Refactored bridge config to take bridge description

OVSDB provides lots of bridge configuration options but the exisisting
bridge config implementation only allows some of them by overloading
addBridge method. Also some of the bridge properties were set static
and unable to configure. This patch fixes these limitations.

- Added some bridge config options to the bridge description
- Deprecated multiple overloaded addBridge methods
- Some code clean up

Change-Id: Ibc828177b210bd4b215aea0b63cc359776c13e03
diff --git a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbBridge.java b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbBridge.java
index 73d7dd8..00eb375 100644
--- a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbBridge.java
+++ b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbBridge.java
@@ -15,32 +15,55 @@
  */
 package org.onosproject.ovsdb.controller;
 
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import org.onosproject.net.behaviour.BridgeDescription;
+import org.onosproject.net.behaviour.BridgeDescription.FailMode;
+import org.onosproject.net.behaviour.ControllerInfo;
+
 import static com.google.common.base.MoreObjects.toStringHelper;
+import static org.onosproject.ovsdb.controller.OvsdbConstant.DATAPATH_ID;
+import static org.onosproject.ovsdb.controller.OvsdbConstant.DISABLE_INBAND;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+
 import static com.google.common.base.Preconditions.checkNotNull;
 
-import java.util.Objects;
-
 /**
- * The class representing an ovsdb bridge.
+ * The class representing an OVSDB bridge.
  * This class is immutable.
  */
 public final class OvsdbBridge {
 
-    private final OvsdbBridgeName bridgeName;
-    private final OvsdbDatapathId datapathId;
+    private final String name;
+
+    /* OpenFlow properties */
+    private final Optional<FailMode> failMode;
+    private final List<ControllerInfo> controllers;
+
+    /* Adds more properties */
+
+    /* other optional configs */
+    private final Map<String, String> otherConfigs;
 
     /**
-     * Constructor from an OvsdbBridgeName bridgeName and an OvsdbDatapathId
-     * datapathId.
+     * Default constructor.
      *
-     * @param bridgeName the bridgeName to use
-     * @param datapathId the datapathId to use
+     * @param name name of the bridge
+     * @param failMode openflow controller fail mode policy
+     * @param controllers list of openflow controllers
+     * @param otherConfigs other configs
      */
-    public OvsdbBridge(OvsdbBridgeName bridgeName, OvsdbDatapathId datapathId) {
-        checkNotNull(bridgeName, "bridgeName is not null");
-        checkNotNull(datapathId, "datapathId is not null");
-        this.bridgeName = bridgeName;
-        this.datapathId = datapathId;
+    private OvsdbBridge(String name, Optional<FailMode> failMode,
+                       List<ControllerInfo> controllers,
+                       Map<String, String> otherConfigs) {
+        this.name = checkNotNull(name);
+        this.failMode = failMode;
+        this.controllers = controllers;
+        this.otherConfigs = otherConfigs;
     }
 
     /**
@@ -48,22 +71,49 @@
      *
      * @return the bridge name of bridge
      */
-    public OvsdbBridgeName bridgeName() {
-        return bridgeName;
+    public String name() {
+        return name;
+    }
+
+    /**
+     * Returns the controllers of the bridge.
+     *
+     * @return list of controllers
+     */
+    public List<ControllerInfo> controllers() {
+        return controllers;
+    }
+
+    /**
+     * Returns fail mode of the bridge.
+     *
+     * @return fail mode
+     */
+    public Optional<FailMode> failMode() {
+        return failMode;
+    }
+
+    /**
+     * Returns other configurations of the bridge.
+     *
+     * @return map of configurations
+     */
+    public Map<String, String> otherConfigs() {
+        return otherConfigs;
     }
 
     /**
      * Gets the datapathId of bridge.
      *
-     * @return datapathId the datapathId to use
+     * @return datapath id; null if not used
      */
-    public OvsdbDatapathId datapathId() {
-        return datapathId;
+    public Optional<String> datapathId() {
+        return Optional.ofNullable(otherConfigs.get(DATAPATH_ID));
     }
 
     @Override
     public int hashCode() {
-        return Objects.hash(bridgeName, datapathId);
+        return Objects.hash(name);
     }
 
     @Override
@@ -73,16 +123,154 @@
         }
         if (obj instanceof OvsdbBridge) {
             final OvsdbBridge otherOvsdbBridge = (OvsdbBridge) obj;
-            return Objects.equals(this.bridgeName, otherOvsdbBridge.bridgeName)
-                    && Objects.equals(this.datapathId,
-                                      otherOvsdbBridge.datapathId);
+            return Objects.equals(this.name, otherOvsdbBridge.name);
         }
         return false;
     }
 
     @Override
     public String toString() {
-        return toStringHelper(this).add("bridgeName", bridgeName.value())
-                .add("datapathId", datapathId.value()).toString();
+        return toStringHelper(this)
+                .add("bridgeName", name)
+                .add("failMode", failMode)
+                .add("controllers", controllers)
+                .add("otherConfigs", otherConfigs)
+                .toString();
+    }
+
+    /**
+     * Returns a new builder instance.
+     *
+     * @return ovsdb bridge builder
+     */
+    public static OvsdbBridge.Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Returns OVSDB bridge object with a given bridge description.
+     *
+     * @param bridgeDesc bridge description
+     * @return ovsdb bridge
+     */
+    public static OvsdbBridge.Builder builder(BridgeDescription bridgeDesc) {
+        return new Builder(bridgeDesc);
+    }
+
+    /**
+     * Builder of OVSDB bridge entities.
+     */
+    public static final class Builder {
+        private String name;
+        private Optional<FailMode> failMode = Optional.empty();
+        private List<ControllerInfo> controllers = Lists.newArrayList();
+        private Map<String, String> otherConfigs = Maps.newHashMap();
+
+        private Builder() {
+        }
+
+        /**
+         * Constructs OVSDB bridge builder with a given bridge description.
+         *
+         * @param bridgeDesc bridge description
+         */
+        private Builder(BridgeDescription bridgeDesc) {
+            if (bridgeDesc.datapathId().isPresent()) {
+                otherConfigs.put(DATAPATH_ID, bridgeDesc.datapathId().get());
+            }
+            if (bridgeDesc.disableInBand().isPresent()) {
+                otherConfigs.put(DISABLE_INBAND,
+                                 bridgeDesc.disableInBand().get().toString());
+            }
+
+            this.name = bridgeDesc.name();
+            this.failMode = bridgeDesc.failMode();
+            this.controllers = Lists.newArrayList(bridgeDesc.controllers());
+        }
+
+        /**
+         * Builds an immutable OVSDB bridge.
+         *
+         * @return ovsdb bridge
+         */
+        public OvsdbBridge build() {
+            return new OvsdbBridge(name, failMode, controllers, otherConfigs);
+        }
+
+        /**
+         * Returns OVSDB bridge builder with a given name.
+         *
+         * @param name name of the bridge
+         * @return ovsdb bridge builder
+         */
+        public Builder name(String name) {
+            this.name = name;
+            return this;
+        }
+
+        /**
+         * Returns OVSDB bridge builder with a given fail mode.
+         *
+         * @param failMode fail mode
+         * @return ovsdb bridge builder
+         */
+        public Builder failMode(FailMode failMode) {
+            this.failMode = Optional.ofNullable(failMode);
+            return this;
+        }
+
+        /**
+         * Returns OVSDB bridge builder with given controllers.
+         *
+         * @param controllers list of controllers
+         * @return ovsdb bridge builder
+         */
+        public Builder controllers(List<ControllerInfo> controllers) {
+            this.controllers = Lists.newArrayList(controllers);
+            return this;
+        }
+
+        /**
+         * Returns OVSDB bridge builder with a given controller.
+         *
+         * @param controller controller
+         * @return ovsdb bridge builder
+         */
+        public Builder controller(ControllerInfo controller) {
+            this.controllers = Lists.newArrayList(controller);
+            return this;
+        }
+
+        /**
+         * Returns OVSDB bridge builder with given configs.
+         *
+         * @param otherConfigs other configs
+         * @return ovsdb bridge builder
+         */
+        public Builder otherConfigs(Map<String, String> otherConfigs) {
+            this.otherConfigs = Maps.newHashMap(otherConfigs);
+            return this;
+        }
+
+        /**
+         * Returns OVSDB bridge builder with a given datapath ID.
+         *
+         * @param datapathId datapath id
+         * @return ovsdb bridge builder
+         */
+        public Builder datapathId(String datapathId) {
+            otherConfigs.put(DATAPATH_ID, datapathId);
+            return this;
+        }
+
+        /**
+         * Returns OVSDB bridge builder with a given disable in-band config.
+         *
+         * @return ovsdb bridge builder
+         */
+        public Builder disableInBand() {
+            otherConfigs.put(DATAPATH_ID, Boolean.TRUE.toString());
+            return this;
+        }
     }
 }
diff --git a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbBridgeName.java b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbBridgeName.java
deleted file mode 100644
index dc905bb..0000000
--- a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbBridgeName.java
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * Copyright 2015-present Open Networking Laboratory
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.onosproject.ovsdb.controller;
-
-import static com.google.common.base.MoreObjects.toStringHelper;
-import static com.google.common.base.Preconditions.checkNotNull;
-
-import java.util.Objects;
-
-/**
- * The class representing a bridge name.
- * This class is immutable.
- */
-public final class OvsdbBridgeName {
-
-    private final String value;
-
-    /**
-     * Constructor from a String.
-     *
-     * @param value the bridge name to use
-     */
-    public OvsdbBridgeName(String value) {
-        checkNotNull(value, "value is not null");
-        this.value = value;
-    }
-
-    /**
-     * Gets the value of bridge name.
-     *
-     * @return the value of the bridge name
-     */
-    public String value() {
-        return value;
-    }
-
-    @Override
-    public int hashCode() {
-        return value.hashCode();
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj) {
-            return true;
-        }
-        if (obj instanceof OvsdbBridgeName) {
-            final OvsdbBridgeName otherBridgeName = (OvsdbBridgeName) obj;
-            return Objects.equals(this.value, otherBridgeName.value);
-        }
-        return false;
-    }
-
-    @Override
-    public String toString() {
-        return toStringHelper(this).add("value", value).toString();
-    }
-
-}
diff --git a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbClientService.java b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbClientService.java
index 8db1dbc..bf91497 100644
--- a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbClientService.java
+++ b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbClientService.java
@@ -72,31 +72,45 @@
     /**
      * Creates a bridge.
      *
+     * @deprecated version 1.7.0 - Hummingbird
      * @param bridgeName bridge name
      */
+    @Deprecated
     void createBridge(String bridgeName);
 
     /**
      * Creates a bridge.
      *
+     * @deprecated version 1.7.0 - Hummingbird
      * @param bridgeName bridge name
      * @param dpid data path id
      * @param exPortName external port name
      */
+    @Deprecated
     void createBridge(String bridgeName, String dpid, String exPortName);
 
     /**
      * Creates a bridge with given name and dpid.
      * Sets the bridge's controller with given controllers.
      *
+     * @deprecated version 1.7.0 - Hummingbird
      * @param bridgeName bridge name
      * @param dpid data path id
      * @param controllers controllers
      * @return true if bridge creation is successful, false otherwise
      */
+    @Deprecated
     boolean createBridge(String bridgeName, String dpid, List<ControllerInfo> controllers);
 
     /**
+     * Creates a bridge with a given bridge description.
+     *
+     * @param ovsdbBridge ovsdb bridge description
+     * @return true if bridge creation is successful, otherwise false
+     */
+    boolean createBridge(OvsdbBridge ovsdbBridge);
+
+    /**
      * Drops a bridge.
      *
      * @param bridgeName bridge name
@@ -119,6 +133,15 @@
     Set<ControllerInfo> getControllers(DeviceId openflowDeviceId);
 
     /**
+     * Returns local controller information.
+     * The connection is a TCP connection to the local ONOS instance's IP
+     * and the default OpenFlow port.
+     *
+     * @return local controller
+     */
+    ControllerInfo localController();
+
+    /**
      * Sets the Controllers for the specified bridge.
      * <p>
      * This method will replace the existing controller list with the new controller
diff --git a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbConstant.java b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbConstant.java
index c1d00a1..5bca1f9 100644
--- a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbConstant.java
+++ b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbConstant.java
@@ -29,40 +29,46 @@
     private OvsdbConstant() {
     }
 
+    /** Common column names. */
+    public static final String UUID = "_uuid";
+
     /** Ovsdb database Open_vSwitch. */
     public static final String DATABASENAME = "Open_vSwitch";
 
-    /** Ovsdb table Bridge. */
+    /** Open_vSwitch table. */
+    public static final String BRIDGES = "bridges";
+
+    /** Bridge table. */
     public static final String BRIDGE = "Bridge";
+    public static final String PORTS = "ports";
+    // other configs
+    public static final String DATAPATH_ID = "datapath-id";
+    public static final String DISABLE_INBAND = "disable-in-band";
 
-    /** Ovsdb table Interface. */
+    /** Interface table. */
     public static final String INTERFACE = "Interface";
+    // type
+    public static final String TYPEVXLAN = "vxlan";
+    // virtual machine identifiers
+    public static final String EXTERNAL_ID_INTERFACE_ID = "iface-id";
+    public static final String EXTERNAL_ID_VM_MAC = "attached-mac";
 
-    /** Ovsdb table Controller. */
+    /** Controller table. */
     public static final String CONTROLLER = "Controller";
 
-    /** Ovsdb table Port. */
+    /** Port table. */
     public static final String PORT = "Port";
 
     /** Ovsdb bridge name. */
+    // TODO remove this particular bridge name from OVSDB provider
     public static final String INTEGRATION_BRIDGE = "br-int";
 
-    /** Ovsdb vxlan tunnel type. */
-    public static final String TYPEVXLAN = "vxlan";
-
     /** Openflow version. */
     public static final String OPENFLOW13 = "OpenFlow13";
 
-    /** Ovsdb external_id_interface_id.. */
-    public static final String EXTERNAL_ID_INTERFACE_ID = "iface-id";
-
-    /** Ovsdb external_id_vm_mac. */
-    public static final String EXTERNAL_ID_VM_MAC = "attached-mac";
-
     /** Openflow port. */
     public static final int OFPORT = 6653;
 
     /** Ovsdb port. */
     public static final int OVSDBPORT = 6640;
-
 }
diff --git a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/driver/DefaultOvsdbClient.java b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/driver/DefaultOvsdbClient.java
index 3649866..cbb94ac 100644
--- a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/driver/DefaultOvsdbClient.java
+++ b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/driver/DefaultOvsdbClient.java
@@ -17,7 +17,6 @@
 
 import com.fasterxml.jackson.databind.JsonNode;
 import com.google.common.base.Function;
-import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import com.google.common.collect.Sets;
@@ -29,12 +28,10 @@
 
 import org.onlab.packet.IpAddress;
 import org.onosproject.net.DeviceId;
+import org.onosproject.net.behaviour.BridgeDescription;
 import org.onosproject.net.behaviour.ControllerInfo;
 import org.onosproject.ovsdb.controller.OvsdbBridge;
-import org.onosproject.ovsdb.controller.OvsdbBridgeName;
 import org.onosproject.ovsdb.controller.OvsdbClientService;
-import org.onosproject.ovsdb.controller.OvsdbConstant;
-import org.onosproject.ovsdb.controller.OvsdbDatapathId;
 import org.onosproject.ovsdb.controller.OvsdbNodeId;
 import org.onosproject.ovsdb.controller.OvsdbPort;
 import org.onosproject.ovsdb.controller.OvsdbPortName;
@@ -43,7 +40,6 @@
 import org.onosproject.ovsdb.controller.OvsdbStore;
 import org.onosproject.ovsdb.controller.OvsdbTableStore;
 import org.onosproject.ovsdb.controller.OvsdbTunnel;
-import org.onosproject.ovsdb.rfc.exception.BridgeCreateException;
 import org.onosproject.ovsdb.rfc.jsonrpc.Callback;
 import org.onosproject.ovsdb.rfc.message.OperationResult;
 import org.onosproject.ovsdb.rfc.message.TableUpdates;
@@ -77,7 +73,6 @@
 import java.net.InetSocketAddress;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
@@ -88,28 +83,24 @@
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.stream.Collectors;
 
+import static org.onosproject.ovsdb.controller.OvsdbConstant.*;
+
 /**
  * An representation of an ovsdb client.
  */
-public class DefaultOvsdbClient
-        implements OvsdbProviderService, OvsdbClientService {
+public class DefaultOvsdbClient implements OvsdbProviderService, OvsdbClientService {
 
-    private final Logger log = LoggerFactory
-            .getLogger(DefaultOvsdbClient.class);
+    private final Logger log = LoggerFactory.getLogger(DefaultOvsdbClient.class);
 
     private Channel channel;
-
     private OvsdbAgent agent;
     private boolean connected;
     private OvsdbNodeId nodeId;
     private Callback monitorCallBack;
-
     private OvsdbStore ovsdbStore = new OvsdbStore();
 
     private final Map<String, String> requestMethod = Maps.newHashMap();
-    private final Map<String, SettableFuture<? extends Object>> requestResult = Maps
-            .newHashMap();
-
+    private final Map<String, SettableFuture<? extends Object>> requestResult = Maps.newHashMap();
     private final Map<String, DatabaseSchema> schema = Maps.newHashMap();
     private final Set<OvsdbTunnel> ovsdbTunnels = new HashSet<OvsdbTunnel>();
 
@@ -245,11 +236,9 @@
 
     @Override
     public String getPortUuid(String portName, String bridgeUuid) {
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
 
-        Row bridgeRow = getRow(OvsdbConstant.DATABASENAME,
-                               OvsdbConstant.BRIDGE, bridgeUuid);
-
+        Row bridgeRow = getRow(DATABASENAME, BRIDGE, bridgeUuid);
         Bridge bridge = (Bridge) TableGenerator.getTable(dbSchema, bridgeRow,
                                                          OvsdbTable.BRIDGE);
         if (bridge != null) {
@@ -262,27 +251,23 @@
             }
 
             for (Uuid uuid : ports) {
-                Row portRow = getRow(OvsdbConstant.DATABASENAME,
-                                     OvsdbConstant.PORT, uuid.value());
+                Row portRow = getRow(DATABASENAME, PORT, uuid.value());
                 Port port = (Port) TableGenerator.getTable(dbSchema, portRow,
                                                            OvsdbTable.PORT);
                 if (port != null && portName.equalsIgnoreCase(port.getName())) {
                     return uuid.value();
                 }
             }
-
         }
         return null;
     }
 
     @Override
     public String getInterfaceUuid(String portUuid, String portName) {
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
 
-        Row portRow = getRow(OvsdbConstant.DATABASENAME, OvsdbConstant.PORT,
-                             portUuid);
-        Port port = (Port) TableGenerator.getTable(dbSchema, portRow,
-                                                   OvsdbTable.PORT);
+        Row portRow = getRow(DATABASENAME, PORT, portUuid);
+        Port port = (Port) TableGenerator.getTable(dbSchema, portRow, OvsdbTable.PORT);
 
         if (port != null) {
             OvsdbSet setInterfaces = (OvsdbSet) port.getInterfacesColumn().data();
@@ -295,26 +280,22 @@
             }
 
             for (Uuid uuid : interfaces) {
-                Row intfRow = getRow(OvsdbConstant.DATABASENAME,
-                                     OvsdbConstant.INTERFACE, uuid.value());
+                Row intfRow = getRow(DATABASENAME, INTERFACE, uuid.value());
                 Interface intf = (Interface) TableGenerator
                         .getTable(dbSchema, intfRow, OvsdbTable.INTERFACE);
                 if (intf != null && portName.equalsIgnoreCase(intf.getName())) {
                     return uuid.value();
                 }
             }
-
         }
-
         return null;
     }
 
     @Override
     public String getBridgeUuid(String bridgeName) {
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
 
-        OvsdbRowStore rowStore = getRowStore(OvsdbConstant.DATABASENAME,
-                                             OvsdbConstant.BRIDGE);
+        OvsdbRowStore rowStore = getRowStore(DATABASENAME, BRIDGE);
         if (rowStore == null) {
             log.debug("The bridge uuid is null");
             return null;
@@ -328,23 +309,18 @@
 
         for (String uuid : bridgeTableRows.keySet()) {
             Bridge bridge = (Bridge) TableGenerator
-                    .getTable(dbSchema, bridgeTableRows.get(uuid),
-                              OvsdbTable.BRIDGE);
-
+                    .getTable(dbSchema, bridgeTableRows.get(uuid), OvsdbTable.BRIDGE);
             if (bridge.getName().equals(bridgeName)) {
                 return uuid;
             }
-
         }
         return null;
     }
 
     @Override
-    public String getControllerUuid(String controllerName,
-                                    String controllerTarget) {
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
-        OvsdbRowStore rowStore = getRowStore(OvsdbConstant.DATABASENAME,
-                                             OvsdbConstant.CONTROLLER);
+    public String getControllerUuid(String controllerName, String controllerTarget) {
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
+        OvsdbRowStore rowStore = getRowStore(DATABASENAME, CONTROLLER);
         if (rowStore == null) {
             log.debug("The controller uuid is null");
             return null;
@@ -353,7 +329,6 @@
         ConcurrentMap<String, Row> controllerTableRows = rowStore.getRowStore();
         if (controllerTableRows != null) {
             for (String uuid : controllerTableRows.keySet()) {
-
                 Controller controller = (Controller) TableGenerator
                         .getTable(dbSchema, controllerTableRows.get(uuid),
                                   OvsdbTable.CONTROLLER);
@@ -361,7 +336,6 @@
                 if (target.equalsIgnoreCase(controllerTarget)) {
                     return uuid;
                 }
-
             }
         }
         return null;
@@ -369,8 +343,7 @@
 
     @Override
     public String getOvsUuid(String dbName) {
-        OvsdbRowStore rowStore = getRowStore(OvsdbConstant.DATABASENAME,
-                                             OvsdbConstant.DATABASENAME);
+        OvsdbRowStore rowStore = getRowStore(DATABASENAME, DATABASENAME);
         if (rowStore == null) {
             log.debug("The bridge uuid is null");
             return null;
@@ -392,26 +365,19 @@
     public void createPort(String bridgeName, String portName) {
         String bridgeUuid = getBridgeUuid(bridgeName);
         if (bridgeUuid == null) {
-            log.error("Can't find bridge {} in {}", bridgeName,
-                      nodeId.getIpAddress());
+            log.error("Can't find bridge {} in {}", bridgeName, nodeId.getIpAddress());
             return;
         }
 
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
         String portUuid = getPortUuid(portName, bridgeUuid);
-
-        Port port = (Port) TableGenerator
-                .createTable(dbSchema, OvsdbTable.PORT);
-
+        Port port = (Port) TableGenerator.createTable(dbSchema, OvsdbTable.PORT);
         port.setName(portName);
         if (portUuid == null) {
-            insertConfig(OvsdbConstant.PORT, "_uuid", OvsdbConstant.BRIDGE,
-                         "ports", bridgeUuid, port.getRow());
+            insertConfig(PORT, UUID, BRIDGE, PORTS, bridgeUuid, port.getRow());
         } else {
-            updateConfig(OvsdbConstant.PORT, "_uuid", portUuid, port.getRow());
+            updateConfig(PORT, UUID, portUuid, port.getRow());
         }
-
-        return;
     }
 
     @Override
@@ -425,220 +391,103 @@
         String portUuid = getPortUuid(portName, bridgeUuid);
         if (portUuid != null) {
             log.info("Port {} delete", portName);
-            deleteConfig(OvsdbConstant.PORT, "_uuid", portUuid,
-                         OvsdbConstant.BRIDGE, "ports");
+            deleteConfig(PORT, UUID, portUuid, BRIDGE, PORTS);
         }
     }
 
+    @Deprecated
     @Override
     public void createBridge(String bridgeName) {
-        log.debug("create bridge {}", bridgeName);
+        OvsdbBridge ovsdbBridge = OvsdbBridge.builder()
+                .name(bridgeName)
+                .build();
 
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
-        if (dbSchema == null) {
-            log.warn("The schema is null");
-            return;
-        }
-
-        Bridge bridge = (Bridge) TableGenerator.createTable(dbSchema,
-                                                            OvsdbTable.BRIDGE);
-        if (bridge == null) {
-            log.debug("Can not create bridge");
-            return;
-        }
-
-        Set<String> failModes = new HashSet<>();
-        failModes.add("secure");
-        bridge.setFailMode(failModes);
-
-        Set<String> protocols = new HashSet<>();
-        protocols.add(OvsdbConstant.OPENFLOW13);
-        bridge.setProtocols(protocols);
-
-        String ovsUuid = getOvsUuid(OvsdbConstant.DATABASENAME);
-        if (ovsUuid == null) {
-            log.warn("The Open_vSwitch is null");
-            return;
-        }
-
-        Map<String, String> options = new HashMap<>();
-        options.put("disable-in-band", "true");
-        bridge.setOtherConfig(options);
-
-        String bridgeUuid = getBridgeUuid(bridgeName);
-        if (bridgeUuid == null) {
-            log.debug("Create a new bridge");
-
-            bridge.setName(bridgeName);
-            bridgeUuid = insertConfig(OvsdbConstant.BRIDGE, "_uuid",
-                                      OvsdbConstant.DATABASENAME, "bridges",
-                                      ovsUuid, bridge.getRow());
-
-            if (bridgeUuid != null) {
-                Port port = (Port) TableGenerator.createTable(dbSchema,
-                                                              OvsdbTable.PORT);
-                if (port != null) {
-                    log.debug("the port is not null");
-                    port.setName(bridgeName);
-
-                    insertConfig(OvsdbConstant.PORT, "_uuid", "Bridge", "ports", bridgeUuid,
-                                 port.getRow());
-                }
-            } else {
-                String message = BridgeCreateException.createMessage(ovsUuid);
-                throw new BridgeCreateException(message);
-            }
-
-        } else {
-            log.info("Update a bridge");
-            updateConfig(OvsdbConstant.BRIDGE, "_uuid", bridgeUuid, bridge.getRow());
-        }
-
-        setControllerAuto(bridgeUuid);
-        log.info("Create bridge success");
+        createBridge(ovsdbBridge);
     }
 
+    @Deprecated
     @Override
     public void createBridge(String bridgeName, String dpid, String exPortName) {
-        log.debug("create bridge {}", bridgeName);
+        OvsdbBridge ovsdbBridge = OvsdbBridge.builder()
+                .name(bridgeName)
+                .failMode(BridgeDescription.FailMode.SECURE)
+                .datapathId(dpid)
+                .disableInBand()
+                .controllers(Lists.newArrayList(localController()))
+                .build();
 
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
-        if (dbSchema == null) {
-            log.warn("The schema is null");
-            return;
-        }
+        createBridge(ovsdbBridge);
 
-        Bridge bridge = (Bridge) TableGenerator.createTable(dbSchema,
-                                                            OvsdbTable.BRIDGE);
-        if (bridge == null) {
-            log.debug("Can not create bridge");
-            return;
-        }
-
-        Set<String> failModes = new HashSet<>();
-        failModes.add("secure");
-        bridge.setFailMode(failModes);
-
-        Set<String> protocols = new HashSet<>();
-        protocols.add(OvsdbConstant.OPENFLOW13);
-        bridge.setProtocols(protocols);
-
-        String ovsUuid = getOvsUuid(OvsdbConstant.DATABASENAME);
-        if (ovsUuid == null) {
-            log.warn("The Open_vSwitch is null");
-            return;
-        }
-
-        Map<String, String> options = new HashMap<>();
-        options.put("disable-in-band", "true");
-        if (dpid != null) {
-            options.put("datapath-id", dpid);
-        }
-        bridge.setOtherConfig(options);
-
-        String bridgeUuid = getBridgeUuid(bridgeName);
-        if (bridgeUuid == null) {
-            log.debug("Create a new bridge");
-
-            bridge.setName(bridgeName);
-            bridgeUuid = insertConfig(OvsdbConstant.BRIDGE, "_uuid",
-                                      OvsdbConstant.DATABASENAME, "bridges",
-                                      ovsUuid, bridge.getRow());
-
-            if (bridgeUuid != null) {
-                Port port = (Port) TableGenerator.createTable(dbSchema,
-                                                              OvsdbTable.PORT);
-                if (port != null) {
-                    log.debug("the port is not null");
-                    port.setName(bridgeName);
-
-                    insertConfig(OvsdbConstant.PORT, "_uuid", "Bridge", "ports", bridgeUuid,
-                                 port.getRow());
-                }
-            } else {
-                String message = BridgeCreateException.createMessage(ovsUuid);
-                throw new BridgeCreateException(message);
-            }
-
-        } else {
-            log.info("Update a bridge");
-            updateConfig(OvsdbConstant.BRIDGE, "_uuid", bridgeUuid, bridge.getRow());
-        }
-        // Create external port
         if (exPortName != null) {
             createPort(bridgeName, exPortName);
         }
+    }
 
-        setControllerAuto(bridgeUuid);
-        log.info("Create bridge success");
+    @Deprecated
+    @Override
+    public boolean createBridge(String bridgeName, String dpid, List<ControllerInfo> controllers) {
+        OvsdbBridge ovsdbBridge = OvsdbBridge.builder()
+                .name(bridgeName)
+                .failMode(BridgeDescription.FailMode.SECURE)
+                .datapathId(dpid)
+                .disableInBand()
+                .controllers(controllers)
+                .build();
+
+        return createBridge(ovsdbBridge);
     }
 
     @Override
-    public boolean createBridge(String bridgeName, String dpid, List<ControllerInfo> controllers) {
-
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
-        String ovsUuid = getOvsUuid(OvsdbConstant.DATABASENAME);
+    public boolean createBridge(OvsdbBridge ovsdbBridge) {
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
+        String ovsUuid = getOvsUuid(DATABASENAME);
 
         if (dbSchema == null || ovsUuid == null) {
-            log.warn("Couldn't find database Open_vSwitch");
+            log.error("Can't find database Open_vSwitch");
             return false;
         }
 
         Bridge bridge = (Bridge) TableGenerator.createTable(dbSchema, OvsdbTable.BRIDGE);
-        Set<String> failMode = new HashSet<>(Arrays.asList("secure"));
-        bridge.setFailMode(failMode);
+        bridge.setOtherConfig(ovsdbBridge.otherConfigs());
 
-        Set<String> protocols = new HashSet<>(Arrays.asList(OvsdbConstant.OPENFLOW13));
-        bridge.setProtocols(protocols);
-
-        Map<String, String> options = new HashMap<>();
-        options.put("disable-in-band", "true");
-        if (dpid != null) {
-            options.put("datapath-id", dpid);
+        if (ovsdbBridge.failMode().isPresent()) {
+            String failMode = ovsdbBridge.failMode().get().name().toLowerCase();
+            bridge.setFailMode(Sets.newHashSet(failMode));
         }
-        bridge.setOtherConfig(options);
 
-        String bridgeUuid = getBridgeUuid(bridgeName);
+        String bridgeUuid = getBridgeUuid(ovsdbBridge.name());
         if (bridgeUuid == null) {
-            bridge.setName(bridgeName);
-            bridgeUuid = insertConfig(OvsdbConstant.BRIDGE, "_uuid",
-                                      OvsdbConstant.DATABASENAME, "bridges",
-                                      ovsUuid, bridge.getRow());
+            bridge.setName(ovsdbBridge.name());
+            bridgeUuid = insertConfig(
+                    BRIDGE, UUID, DATABASENAME, BRIDGES,
+                    ovsUuid, bridge.getRow());
         } else {
-            updateConfig(OvsdbConstant.BRIDGE, "_uuid", bridgeUuid, bridge.getRow());
+            // update the bridge if it's already existing
+            updateConfig(BRIDGE, UUID, bridgeUuid, bridge.getRow());
         }
 
-        if (bridgeUuid != null) {
-            createPort(bridgeName, bridgeName);
-        } else {
-            log.warn("Failed to create bridge {} on {}", bridgeName, nodeId.toString());
+        if (bridgeUuid == null) {
+            log.warn("Failed to create bridge {} on {}", ovsdbBridge.name(), nodeId);
             return false;
         }
 
-        setControllersWithUuid(Uuid.uuid(bridgeUuid), controllers);
+        createPort(ovsdbBridge.name(), ovsdbBridge.name());
+        setControllersWithUuid(Uuid.uuid(bridgeUuid), ovsdbBridge.controllers());
+
+        log.info("Created bridge {}", ovsdbBridge.name());
         return true;
     }
 
-    /**
-     * Sets the bridge's controller automatically.
-     * <p/>
-     * The connection is a TCP connection to the local ONOS instance's IP
-     * and the default OpenFlow port.
-     *
-     * @param bridgeUuid bridge uuid
-     */
-    private void setControllerAuto(String bridgeUuid) {
-        IpAddress ipAddress = IpAddress.valueOf(((InetSocketAddress) channel.localAddress()).getAddress());
-        ControllerInfo controllerInfo = new ControllerInfo(ipAddress, OvsdbConstant.OFPORT, "tcp");
-        log.debug("Automatically setting controller for bridge {} to {}",
-                  bridgeUuid, controllerInfo.target());
-        setControllersWithUuid(Uuid.uuid(bridgeUuid), ImmutableList.of(controllerInfo));
+    @Override
+    public ControllerInfo localController() {
+        IpAddress ipAddress = IpAddress.valueOf(((InetSocketAddress)
+                channel.localAddress()).getAddress());
+        return new ControllerInfo(ipAddress, OFPORT, "tcp");
     }
 
     @Override
     public void setControllersWithUuid(Uuid bridgeUuid, List<ControllerInfo> controllers) {
-
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
         if (dbSchema == null) {
             log.debug("There is no schema");
             return;
@@ -662,31 +511,27 @@
                 removeControllers.add(controller);
             }
         });
-        OvsdbRowStore controllerRowStore = getRowStore(OvsdbConstant.DATABASENAME,
-                                                       OvsdbConstant.CONTROLLER);
+        OvsdbRowStore controllerRowStore = getRowStore(DATABASENAME, CONTROLLER);
         if (controllerRowStore == null) {
             log.debug("There is no controller table");
             return;
         }
 
-        removeControllers.forEach(c -> deleteConfig(OvsdbConstant.CONTROLLER, "_uuid", c.getRow().uuid().value(),
-                                                    OvsdbConstant.BRIDGE, "controller"));
-
+        removeControllers.forEach(c -> deleteConfig(CONTROLLER, UUID, c.getRow().uuid().value(),
+                                                    BRIDGE, "controller"));
         newControllers.stream().map(c -> {
             Controller controller = (Controller) TableGenerator
                     .createTable(dbSchema, OvsdbTable.CONTROLLER);
             controller.setTarget(c.target());
             return controller;
         }).forEach(c -> {
-            String uuid = insertConfig(OvsdbConstant.CONTROLLER, "_uuid",
-                                       OvsdbConstant.BRIDGE, "controller", bridgeUuid.value(),
+            String uuid = insertConfig(CONTROLLER, UUID, BRIDGE, "controller", bridgeUuid.value(),
                                        c.getRow());
             newControllerUuids.add(Uuid.uuid(uuid));
 
         });
 
-        OvsdbRowStore rowStore = getRowStore(OvsdbConstant.DATABASENAME,
-                                             OvsdbConstant.BRIDGE);
+        OvsdbRowStore rowStore = getRowStore(DATABASENAME, BRIDGE);
         if (rowStore == null) {
             log.debug("There is no bridge table");
             return;
@@ -695,7 +540,7 @@
         Row bridgeRow = rowStore.getRow(bridgeUuid.value());
         Bridge bridge = (Bridge) TableGenerator.getTable(dbSchema, bridgeRow, OvsdbTable.BRIDGE);
         bridge.setController(OvsdbSet.ovsdbSet(newControllerUuids));
-        updateConfig(OvsdbConstant.BRIDGE, "_uuid", bridgeUuid.value(), bridge.getRow());
+        updateConfig(BRIDGE, UUID, bridgeUuid.value(), bridge.getRow());
     }
 
     @Override
@@ -710,13 +555,11 @@
             log.warn("Could not find bridge in node", nodeId.getIpAddress());
             return;
         }
-        deleteConfig(OvsdbConstant.BRIDGE, "_uuid", bridgeUuid,
-                     OvsdbConstant.DATABASENAME, "bridges");
+        deleteConfig(BRIDGE, UUID, bridgeUuid, DATABASENAME, "bridges");
     }
 
     @Override
     public boolean createTunnel(String bridgeName, String portName, String tunnelType, Map<String, String> options) {
-
         String bridgeUuid  = getBridgeUuid(bridgeName);
         if (bridgeUuid == null) {
             log.warn("Couldn't find bridge {} in {}", bridgeName, nodeId.getIpAddress());
@@ -730,7 +573,7 @@
         }
 
         ArrayList<Operation> operations = Lists.newArrayList();
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
 
         // insert a new port to the port table
         Port port = (Port) TableGenerator.createTable(dbSchema, OvsdbTable.PORT);
@@ -740,8 +583,8 @@
         operations.add(portInsert);
 
         // update the bridge table
-        Condition condition = ConditionUtil.isEqual("_uuid", Uuid.uuid(bridgeUuid));
-        Mutation mutation = MutationUtil.insert("ports", Uuid.uuid("Port"));
+        Condition condition = ConditionUtil.isEqual(UUID, Uuid.uuid(bridgeUuid));
+        Mutation mutation = MutationUtil.insert(PORTS, Uuid.uuid("Port"));
         List<Condition> conditions = new ArrayList<>(Arrays.asList(condition));
         List<Mutation> mutations = new ArrayList<>(Arrays.asList(mutation));
         operations.add(new Mutate(dbSchema.getTableSchema("Bridge"), conditions, mutations));
@@ -754,15 +597,15 @@
         Insert intfInsert = new Insert(dbSchema.getTableSchema("Interface"), "Interface", intf.getRow());
         operations.add(intfInsert);
 
-        transactConfig(OvsdbConstant.DATABASENAME, operations);
+        transactConfig(DATABASENAME, operations);
         return true;
     }
 
     @Override
     public void dropTunnel(IpAddress srcIp, IpAddress dstIp) {
-        String bridgeName = OvsdbConstant.INTEGRATION_BRIDGE;
-        String portName = getTunnelName(OvsdbConstant.TYPEVXLAN, dstIp);
-        String bridgeUuid = getBridgeUuid(OvsdbConstant.INTEGRATION_BRIDGE);
+        String bridgeName = INTEGRATION_BRIDGE;
+        String portName = getTunnelName(TYPEVXLAN, dstIp);
+        String bridgeUuid = getBridgeUuid(INTEGRATION_BRIDGE);
         if (bridgeUuid == null) {
             log.warn("Could not find bridge {} in {}", bridgeName,
                      nodeId.getIpAddress());
@@ -772,11 +615,8 @@
         String portUuid = getPortUuid(portName, bridgeUuid);
         if (portUuid != null) {
             log.info("Delete tunnel");
-            deleteConfig(OvsdbConstant.PORT, "_uuid", portUuid,
-                         OvsdbConstant.BRIDGE, "ports");
+            deleteConfig(PORT, UUID, portUuid, BRIDGE, PORTS);
         }
-
-        return;
     }
 
     /**
@@ -791,7 +631,7 @@
     private void deleteConfig(String childTableName, String childColumnName,
                               String childUuid, String parentTableName,
                               String parentColumnName) {
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
         TableSchema childTableSchema = dbSchema.getTableSchema(childTableName);
 
         ArrayList<Operation> operations = Lists.newArrayList();
@@ -817,9 +657,7 @@
         conditions.add(condition);
         Delete del = new Delete(childTableSchema, conditions);
         operations.add(del);
-        transactConfig(OvsdbConstant.DATABASENAME, operations);
-
-        return;
+        transactConfig(DATABASENAME, operations);
     }
 
     /**
@@ -832,7 +670,7 @@
      */
     private void updateConfig(String tableName, String columnName, String uuid,
                               Row row) {
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
         TableSchema tableSchema = dbSchema.getTableSchema(tableName);
 
         List<Condition> conditions = Lists.newArrayList();
@@ -844,7 +682,7 @@
         ArrayList<Operation> operations = Lists.newArrayList();
         operations.add(update);
 
-        transactConfig(OvsdbConstant.DATABASENAME, operations);
+        transactConfig(DATABASENAME, operations);
     }
 
     /**
@@ -861,7 +699,7 @@
     private String insertConfig(String childTableName, String childColumnName,
                                 String parentTableName, String parentColumnName,
                                 String parentUuid, Row row) {
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
         TableSchema tableSchema = dbSchema.getTableSchema(childTableName);
 
         Insert insert = new Insert(tableSchema, childTableName, row);
@@ -881,32 +719,27 @@
             mutations.add(mutation);
 
             List<Condition> conditions = Lists.newArrayList();
-            Condition condition = ConditionUtil.isEqual("_uuid",
-                                                       Uuid.uuid(parentUuid));
+            Condition condition = ConditionUtil.isEqual(UUID, Uuid.uuid(parentUuid));
             conditions.add(condition);
 
             Mutate op = new Mutate(parentTableSchema, conditions, mutations);
             operations.add(op);
         }
-        if (childTableName.equalsIgnoreCase(OvsdbConstant.PORT)) {
-            log.info("Handle port insert");
-            Insert intfInsert = handlePortInsertTable(OvsdbConstant.INTERFACE,
-                                                      row);
+        if (childTableName.equalsIgnoreCase(PORT)) {
+            log.debug("Handle port insert");
+            Insert intfInsert = handlePortInsertTable(INTERFACE, row);
 
             if (intfInsert != null) {
                 operations.add(intfInsert);
             }
 
             Insert ins = (Insert) operations.get(0);
-            ins.getRow().put("interfaces",
-                             Uuid.uuid(OvsdbConstant.INTERFACE));
+            ins.getRow().put("interfaces", Uuid.uuid(INTERFACE));
         }
 
         List<OperationResult> results;
         try {
-            results = transactConfig(OvsdbConstant.DATABASENAME, operations)
-                    .get();
-
+            results = transactConfig(DATABASENAME, operations).get();
             return results.get(0).getUuid().value();
         } catch (InterruptedException e) {
             log.warn("Interrupted while waiting to get result");
@@ -926,30 +759,23 @@
      * @return insert, empty if null
      */
     private Insert handlePortInsertTable(String tableName, Row portRow) {
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
 
-        TableSchema portTableSchema = dbSchema
-                .getTableSchema(OvsdbConstant.PORT);
+        TableSchema portTableSchema = dbSchema.getTableSchema(PORT);
         ColumnSchema portColumnSchema = portTableSchema.getColumnSchema("name");
 
         String portName = (String) portRow.getColumn(portColumnSchema.name()).data();
-
-        Interface inf = (Interface) TableGenerator
-                .createTable(dbSchema, OvsdbTable.INTERFACE);
-
+        Interface inf = (Interface) TableGenerator.createTable(dbSchema, OvsdbTable.INTERFACE);
         inf.setName(portName);
 
-        TableSchema intfTableSchema = dbSchema
-                .getTableSchema(OvsdbConstant.INTERFACE);
-        Insert insert = new Insert(intfTableSchema, OvsdbConstant.INTERFACE,
-                                   inf.getRow());
-        return insert;
+        TableSchema intfTableSchema = dbSchema.getTableSchema(INTERFACE);
+        return new Insert(intfTableSchema, INTERFACE, inf.getRow());
     }
 
     /**
      * Gets tunnel name.
      *
-     * @param tunnelType
+     * @param tunnelType tunnel type
      * @param dstIp      the remote ip address
      * @return tunnel name
      */
@@ -966,20 +792,15 @@
         if (databaseSchema == null) {
             List<String> dbNames = new ArrayList<String>();
             dbNames.add(dbName);
-            Function<JsonNode, DatabaseSchema> rowFunction = new Function<JsonNode, DatabaseSchema>() {
-                @Override
-                public DatabaseSchema apply(JsonNode input) {
-                    log.info("Get ovsdb database schema {}", dbName);
-                    DatabaseSchema dbSchema = FromJsonUtil
-                            .jsonNodeToDbSchema(dbName, input);
-                    if (dbSchema == null) {
-                        log.debug("Get ovsdb database schema error");
-                        return null;
-                    }
-                    schema.put(dbName, dbSchema);
-
-                    return dbSchema;
+            Function<JsonNode, DatabaseSchema> rowFunction = input -> {
+                log.debug("Get ovsdb database schema {}", dbName);
+                DatabaseSchema dbSchema = FromJsonUtil.jsonNodeToDbSchema(dbName, input);
+                if (dbSchema == null) {
+                    log.debug("Get ovsdb database schema error");
+                    return null;
                 }
+                schema.put(dbName, dbSchema);
+                return dbSchema;
             };
 
             ListenableFuture<JsonNode> input = getSchema(dbNames);
@@ -999,18 +820,14 @@
         }
         DatabaseSchema dbSchema = schema.get(dbName);
         if (dbSchema != null) {
-            Function<JsonNode, TableUpdates> rowFunction = new Function<JsonNode, TableUpdates>() {
-                @Override
-                public TableUpdates apply(JsonNode input) {
-                    log.info("Get table updates");
-                    TableUpdates updates = FromJsonUtil
-                            .jsonNodeToTableUpdates(input, dbSchema);
-                    if (updates == null) {
-                        log.debug("Get table updates error");
-                        return null;
-                    }
-                    return updates;
+            Function<JsonNode, TableUpdates> rowFunction = input -> {
+                log.debug("Get table updates");
+                TableUpdates updates = FromJsonUtil.jsonNodeToTableUpdates(input, dbSchema);
+                if (updates == null) {
+                    log.debug("Get table updates error");
+                    return null;
                 }
+                return updates;
             };
             return Futures.transform(monitor(dbSchema, id), rowFunction);
         }
@@ -1026,18 +843,15 @@
         DatabaseSchema dbSchema = schema.get(dbName);
         if (dbSchema != null) {
             Function<List<JsonNode>, List<OperationResult>> rowFunction = (input -> {
-                log.info("Get ovsdb operation result");
-                List<OperationResult> result = FromJsonUtil
-                        .jsonNodeToOperationResult(input, operations);
-
+                log.debug("Get ovsdb operation result");
+                List<OperationResult> result = FromJsonUtil.jsonNodeToOperationResult(input, operations);
                 if (result == null) {
                     log.debug("The operation result is null");
                     return null;
                 }
                 return result;
             });
-            return Futures.transform(transact(dbSchema, operations),
-                                     rowFunction);
+            return Futures.transform(transact(dbSchema, operations), rowFunction);
         }
         return null;
     }
@@ -1053,7 +867,6 @@
 
         channel.writeAndFlush(getSchemaString);
         return sf;
-
     }
 
     @Override
@@ -1067,7 +880,6 @@
 
         channel.writeAndFlush(echoString);
         return sf;
-
     }
 
     @Override
@@ -1083,7 +895,6 @@
 
         channel.writeAndFlush(monitorString);
         return sf;
-
     }
 
     @Override
@@ -1097,7 +908,6 @@
 
         channel.writeAndFlush(listDbsString);
         return sf;
-
     }
 
     @Override
@@ -1113,7 +923,6 @@
 
         channel.writeAndFlush(transactString);
         return sf;
-
     }
 
     @SuppressWarnings({"rawtypes", "unchecked"})
@@ -1127,12 +936,7 @@
             return;
         }
         String methodName = requestMethod.get(requestId);
-
-        Object result;
-        result = FromJsonUtil.jsonResultParser(response, methodName);
-
-        sf.set(result);
-        return;
+        sf.set(FromJsonUtil.jsonResultParser(response, methodName));
     }
 
     @Override
@@ -1143,12 +947,8 @@
 
             String replyString = FromJsonUtil.getEchoRequestStr(requestJson);
             channel.writeAndFlush(replyString);
-
-            return;
         } else {
-            FromJsonUtil
-                    .jsonCallbackRequestParser(requestJson, monitorCallBack);
-            return;
+            FromJsonUtil.jsonCallbackRequestParser(requestJson, monitorCallBack);
         }
     }
 
@@ -1164,19 +964,18 @@
 
     @Override
     public Set<OvsdbBridge> getBridges() {
-        Set<OvsdbBridge> ovsdbBridges = new HashSet<OvsdbBridge>();
-        OvsdbTableStore tableStore = getTableStore(OvsdbConstant.DATABASENAME);
+        Set<OvsdbBridge> ovsdbBridges = new HashSet<>();
+        OvsdbTableStore tableStore = getTableStore(DATABASENAME);
         if (tableStore == null) {
             return null;
         }
-        OvsdbRowStore rowStore = tableStore.getRows(OvsdbConstant.BRIDGE);
+        OvsdbRowStore rowStore = tableStore.getRows(BRIDGE);
         if (rowStore == null) {
             return null;
         }
         ConcurrentMap<String, Row> rows = rowStore.getRowStore();
         for (String uuid : rows.keySet()) {
-            Row row = getRow(OvsdbConstant.DATABASENAME, OvsdbConstant.BRIDGE,
-                             uuid);
+            Row row = getRow(DATABASENAME, BRIDGE, uuid);
             OvsdbBridge ovsdbBridge = getOvsdbBridge(row);
             if (ovsdbBridge != null) {
                 ovsdbBridges.add(ovsdbBridge);
@@ -1197,19 +996,17 @@
             log.warn("bad list of controllers");
             return null;
         }
-        return controllers.stream().
-                map(controller -> new ControllerInfo(
-                        (String) controller.getTargetColumn()
-                                .data())).collect(Collectors.toSet());
+        return controllers.stream().map(controller -> new ControllerInfo(
+                (String) controller.getTargetColumn()
+                        .data())).collect(Collectors.toSet());
     }
 
     private List<Controller> getControllers(Uuid bridgeUuid) {
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
         if (dbSchema == null) {
             return null;
         }
-        OvsdbRowStore rowStore = getRowStore(OvsdbConstant.DATABASENAME,
-                                             OvsdbConstant.BRIDGE);
+        OvsdbRowStore rowStore = getRowStore(DATABASENAME, BRIDGE);
         if (rowStore == null) {
             log.debug("There is no bridge table");
             return null;
@@ -1224,10 +1021,8 @@
                 .data().getClass());
         Set<Uuid> controllerUuids = (Set<Uuid>) ((OvsdbSet) bridge
                 .getControllerColumn().data()).set();
-//        Set<String> controllerUuidStrings = (Set<String>) bridge.getControllerColumn().data();
 
-        OvsdbRowStore controllerRowStore = getRowStore(OvsdbConstant.DATABASENAME,
-                                                       OvsdbConstant.CONTROLLER);
+        OvsdbRowStore controllerRowStore = getRowStore(DATABASENAME, CONTROLLER);
         if (controllerRowStore == null) {
             log.debug("There is no controller table");
             return null;
@@ -1248,12 +1043,11 @@
 
 
     private Uuid getBridgeUuid(DeviceId openflowDeviceId) {
-        DatabaseSchema dbSchema = schema.get(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = schema.get(DATABASENAME);
         if (dbSchema == null) {
             return null;
         }
-        OvsdbRowStore rowStore = getRowStore(OvsdbConstant.DATABASENAME,
-                                             OvsdbConstant.BRIDGE);
+        OvsdbRowStore rowStore = getRowStore(DATABASENAME, BRIDGE);
         if (rowStore == null) {
             log.debug("There is no bridge table");
             return null;
@@ -1262,10 +1056,12 @@
         ConcurrentMap<String, Row> bridgeTableRows = rowStore.getRowStore();
         final AtomicReference<Uuid> uuid = new AtomicReference<>();
         for (Map.Entry<String, Row> entry : bridgeTableRows.entrySet()) {
-            Bridge b = (Bridge) TableGenerator.getTable(dbSchema,
-                                                        entry.getValue(),
-                                                        OvsdbTable.BRIDGE);
-            if (matchesDpid(b, openflowDeviceId)) {
+            Bridge bridge = (Bridge) TableGenerator.getTable(
+                    dbSchema,
+                    entry.getValue(),
+                    OvsdbTable.BRIDGE);
+
+            if (matchesDpid(bridge, openflowDeviceId)) {
                 uuid.set(Uuid.uuid(entry.getKey()));
                 break;
             }
@@ -1274,7 +1070,6 @@
             log.debug("There is no bridge for {}", openflowDeviceId);
         }
         return uuid.get();
-
     }
 
     private static boolean matchesDpid(Bridge b, DeviceId deviceId) {
@@ -1286,19 +1081,18 @@
 
     @Override
     public Set<OvsdbPort> getPorts() {
-        Set<OvsdbPort> ovsdbPorts = new HashSet<OvsdbPort>();
-        OvsdbTableStore tableStore = getTableStore(OvsdbConstant.DATABASENAME);
+        Set<OvsdbPort> ovsdbPorts = new HashSet<>();
+        OvsdbTableStore tableStore = getTableStore(DATABASENAME);
         if (tableStore == null) {
             return null;
         }
-        OvsdbRowStore rowStore = tableStore.getRows(OvsdbConstant.INTERFACE);
+        OvsdbRowStore rowStore = tableStore.getRows(INTERFACE);
         if (rowStore == null) {
             return null;
         }
         ConcurrentMap<String, Row> rows = rowStore.getRowStore();
         for (String uuid : rows.keySet()) {
-            Row row = getRow(OvsdbConstant.DATABASENAME,
-                             OvsdbConstant.INTERFACE, uuid);
+            Row row = getRow(DATABASENAME, INTERFACE, uuid);
             OvsdbPort ovsdbPort = getOvsdbPort(row);
             if (ovsdbPort != null) {
                 ovsdbPorts.add(ovsdbPort);
@@ -1312,9 +1106,8 @@
         return schema.get(dbName);
     }
 
-    //Gets ovsdb port.
     private OvsdbPort getOvsdbPort(Row row) {
-        DatabaseSchema dbSchema = getDatabaseSchema(OvsdbConstant.DATABASENAME);
+        DatabaseSchema dbSchema = getDatabaseSchema(DATABASENAME);
         Interface intf = (Interface) TableGenerator
                 .getTable(dbSchema, row, OvsdbTable.INTERFACE);
         if (intf == null) {
@@ -1325,17 +1118,12 @@
         if ((ofPort < 0) || (portName == null)) {
             return null;
         }
-
-        OvsdbPort ovsdbPort = new OvsdbPort(new OvsdbPortNumber(ofPort),
-                                            new OvsdbPortName(portName));
-        return ovsdbPort;
+        return new OvsdbPort(new OvsdbPortNumber(ofPort), new OvsdbPortName(portName));
     }
 
-    ////Gets ovsdb bridge.
     private OvsdbBridge getOvsdbBridge(Row row) {
-        DatabaseSchema dbSchema = getDatabaseSchema(OvsdbConstant.DATABASENAME);
-        Bridge bridge = (Bridge) TableGenerator.getTable(dbSchema, row,
-                                                         OvsdbTable.BRIDGE);
+        DatabaseSchema dbSchema = getDatabaseSchema(DATABASENAME);
+        Bridge bridge = (Bridge) TableGenerator.getTable(dbSchema, row, OvsdbTable.BRIDGE);
         if (bridge == null) {
             return null;
         }
@@ -1351,18 +1139,14 @@
         if ((datapathId == null) || (bridgeName == null)) {
             return null;
         }
-
-        OvsdbBridge ovsdbBridge = new OvsdbBridge(new OvsdbBridgeName(bridgeName),
-                                                  new OvsdbDatapathId(datapathId));
-        return ovsdbBridge;
+        return OvsdbBridge.builder().name(bridgeName).datapathId(datapathId).build();
     }
 
-    //Gets ofPort in the interface.
     private long getOfPort(Interface intf) {
         OvsdbSet ofPortSet = (OvsdbSet) intf.getOpenFlowPortColumn().data();
         @SuppressWarnings("unchecked")
         Set<Integer> ofPorts = ofPortSet.set();
-        while (ofPorts == null || ofPorts.size() <= 0) {
+        if (ofPorts == null || ofPorts.size() <= 0) {
             log.debug("The ofport is null in {}", intf.getName());
             return -1;
         }
@@ -1373,41 +1157,38 @@
 
     @Override
     public Set<OvsdbPort> getLocalPorts(Iterable<String> ifaceids) {
-        Set<OvsdbPort> ovsdbPorts = new HashSet<OvsdbPort>();
-        OvsdbTableStore tableStore = getTableStore(OvsdbConstant.DATABASENAME);
+        Set<OvsdbPort> ovsdbPorts = new HashSet<>();
+        OvsdbTableStore tableStore = getTableStore(DATABASENAME);
         if (tableStore == null) {
             return null;
         }
-        OvsdbRowStore rowStore = tableStore.getRows(OvsdbConstant.INTERFACE);
+        OvsdbRowStore rowStore = tableStore.getRows(INTERFACE);
         if (rowStore == null) {
             return null;
         }
         ConcurrentMap<String, Row> rows = rowStore.getRowStore();
         for (String uuid : rows.keySet()) {
-            Row row = getRow(OvsdbConstant.DATABASENAME,
-                             OvsdbConstant.INTERFACE, uuid);
-            DatabaseSchema dbSchema = getDatabaseSchema(OvsdbConstant.DATABASENAME);
+            Row row = getRow(DATABASENAME, INTERFACE, uuid);
+            DatabaseSchema dbSchema = getDatabaseSchema(DATABASENAME);
             Interface intf = (Interface) TableGenerator
                     .getTable(dbSchema, row, OvsdbTable.INTERFACE);
             if (intf == null || getIfaceid(intf) == null) {
                 continue;
             }
             String portName = intf.getName();
+            if (portName == null) {
+                continue;
+            }
             Set<String> ifaceidSet = Sets.newHashSet(ifaceids);
-            if (portName.startsWith("vxlan")
-                    || !ifaceidSet.contains(getIfaceid(intf))) {
+            if (portName.startsWith(TYPEVXLAN) || !ifaceidSet.contains(getIfaceid(intf))) {
                 continue;
             }
             long ofPort = getOfPort(intf);
-            if ((ofPort < 0) || (portName == null)) {
+            if (ofPort < 0) {
                 continue;
             }
-
-            OvsdbPort ovsdbPort = new OvsdbPort(new OvsdbPortNumber(ofPort),
-                                                new OvsdbPortName(portName));
-            if (ovsdbPort != null) {
-                ovsdbPorts.add(ovsdbPort);
-            }
+            ovsdbPorts.add(new OvsdbPort(new OvsdbPortNumber(ofPort),
+                                         new OvsdbPortName(portName)));
         }
         return ovsdbPorts;
     }
@@ -1420,8 +1201,7 @@
             log.warn("The external_ids is null");
             return null;
         }
-        String ifaceid = externalIds
-                .get(OvsdbConstant.EXTERNAL_ID_INTERFACE_ID);
+        String ifaceid = externalIds.get(EXTERNAL_ID_INTERFACE_ID);
         if (ifaceid == null) {
             log.warn("The ifaceid is null");
             return null;
diff --git a/protocols/ovsdb/api/src/test/java/org/onosproject/ovsdb/controller/driver/OvsdbClientServiceAdapter.java b/protocols/ovsdb/api/src/test/java/org/onosproject/ovsdb/controller/driver/OvsdbClientServiceAdapter.java
index a1f719c..c0aaf91 100644
--- a/protocols/ovsdb/api/src/test/java/org/onosproject/ovsdb/controller/driver/OvsdbClientServiceAdapter.java
+++ b/protocols/ovsdb/api/src/test/java/org/onosproject/ovsdb/controller/driver/OvsdbClientServiceAdapter.java
@@ -74,6 +74,11 @@
     }
 
     @Override
+    public boolean createBridge(OvsdbBridge ovsdbBridge) {
+        return true;
+    }
+
+    @Override
     public void dropBridge(String bridgeName) {
 
     }
@@ -89,6 +94,11 @@
     }
 
     @Override
+    public ControllerInfo localController() {
+        return null;
+    }
+
+    @Override
     public void setControllersWithUuid(Uuid bridgeUuid, List<ControllerInfo> controllers) {
 
     }