ONOS-6078
Netconf : Active component

Change-Id: I147193091880c026e198fc723cfe054e5dbea69f
diff --git a/apps/netconfsb/storeadapter/BUCK b/apps/netconfsb/storeadapter/BUCK
new file mode 100644
index 0000000..6444a6c
--- /dev/null
+++ b/apps/netconfsb/storeadapter/BUCK
@@ -0,0 +1,30 @@
+COMPILE_DEPS = [
+    '//lib:CORE_DEPS',
+    '//lib:onos-yang-model',
+    '//lib:onos-yang-runtime',
+    '//apps/config:onos-apps-config',
+    '//protocols/netconf/api:onos-protocols-netconf-api',
+    '//apps/netconfsb/client:onos-apps-netconfsb-client'
+
+
+]
+
+osgi_jar_with_tests (
+  deps = COMPILE_DEPS,
+)
+
+BUNDLES = [
+  '//apps/netconfsb/client:onos-apps-netconfsb-client',
+  '//apps/netconfsb/storeadapter:onos-apps-netconfsb-storeadapter',
+]
+
+onos_app (
+  app_name = 'org.onosproject.netconfsb',
+  title = 'NETCONF Application Module',
+  category = 'Utility',
+  url = 'http://onosproject.org',
+  description = """This application provides an interface for monitoring and modifying datastores
+                   of NETCONF devices using Yang data. It uses the YangRuntime to serialize outbound
+                   messages from Yang into NETCONF and deserialize received messages.""",
+  included_bundles = BUNDLES,
+)
diff --git a/apps/netconfsb/storeadapter/src/main/java/org/onosproject/netconf/storeadapter/NetconfActiveComponent.java b/apps/netconfsb/storeadapter/src/main/java/org/onosproject/netconf/storeadapter/NetconfActiveComponent.java
new file mode 100644
index 0000000..8d824f7
--- /dev/null
+++ b/apps/netconfsb/storeadapter/src/main/java/org/onosproject/netconf/storeadapter/NetconfActiveComponent.java
@@ -0,0 +1,217 @@
+/*
+ * Copyright 2017-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.netconf.storeadapter;
+
+import com.google.common.annotations.Beta;
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onosproject.config.DynamicConfigEvent;
+import org.onosproject.config.DynamicConfigListener;
+import org.onosproject.config.DynamicConfigService;
+import org.onosproject.config.Filter;
+import org.onosproject.mastership.MastershipService;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.resource.Resource;
+import org.onosproject.netconf.client.NetconfTranslator;
+import org.onosproject.netconf.client.NetconfTranslator.OperationType;
+import org.onosproject.netconf.NetconfException;
+import org.onosproject.netconf.NetconfController;
+import java.net.URI;
+import java.net.URISyntaxException;
+import org.onosproject.yang.model.DataNode;
+import org.onosproject.yang.model.LeafNode;
+import org.onosproject.yang.model.ResourceId;
+import org.onosproject.yang.runtime.DefaultResourceData;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+
+@Beta
+@Component(immediate = true)
+public class NetconfActiveComponent implements DynamicConfigListener {
+
+    private static final Logger log = LoggerFactory.getLogger(NetconfActiveComponent.class);
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected DynamicConfigService cfgService;
+    public static final String DEVNMSPACE = "namespace1";
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected NetconfTranslator netconfTranslator;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected MastershipService mastershipService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected NetconfController controller;
+
+    private ResourceId resId = new ResourceId.Builder()
+            .addBranchPointSchema("device", DEVNMSPACE )
+            .build();
+    @Activate
+    protected void activate() {
+        cfgService.addListener(this);
+        log.info("Started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        cfgService.removeListener(this);
+        log.info("Stopped");
+    }
+
+    @Override
+    public boolean isRelevant(DynamicConfigEvent event) {
+        if (event.subject().equals(resId)) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public boolean isMaster(DeviceId deviceId) {
+        if (mastershipService.isLocalMaster(deviceId)) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public void event(DynamicConfigEvent event) {
+        Filter filt = new Filter();
+        DataNode node = cfgService.readNode(event.subject(), filt);
+        DeviceId deviceId = getDeviceId(node);
+        if (!isMaster(deviceId)) {
+            log.info("NetConfListener: not master, ignoring config for {}", event.type());
+            return;
+        }
+        initiateConnection(deviceId);
+        switch (event.type()) {
+            case NODE_ADDED:
+            case NODE_UPDATED:
+            case NODE_REPLACED:
+                configUpdate(node, deviceId, event.subject());
+                break;
+            case NODE_DELETED:
+                configDelete(node, deviceId, event.subject());
+                break;
+            case UNKNOWN_OPRN:
+            default:
+                log.warn("NetConfListener: unknown event: {}", event.type());
+                break;
+        }
+    }
+
+    /**
+     * Performs the delete operation corresponding to the passed event.
+     * @param node a relevant dataNode
+     * @param deviceId the deviceId of the device to be updated
+     * @param resourceId the resourceId of the root of the subtree to be edited
+     * @return true if the update succeeds false otherwise
+     */
+    private boolean configDelete(DataNode node, DeviceId deviceId, ResourceId resourceId) {
+        return parseAndEdit(node, deviceId, resourceId, OperationType.DELETE);
+    }
+
+    /**
+     * Performs the update operation corresponding to the passed event.
+     * @param node a relevant dataNode
+     * @param deviceId the deviceId of the device to be updated
+     * @param resourceId the resourceId of the root of the subtree to be edited
+     * @return true if the update succeeds false otherwise
+     */
+    private boolean configUpdate(DataNode node, DeviceId deviceId, ResourceId resourceId) {
+        return parseAndEdit(node, deviceId, resourceId, OperationType.REPLACE);
+    }
+
+    /**
+     * Parses the incoming event and pushes configuration to the effected
+     * device.
+     * @param node the dataNode effecting a particular device of which this node
+     *              is master
+     * @param deviceId the deviceId of the device to be modified
+     * @param resourceId the resourceId of the root of the subtree to be edited
+     * @param operationType the type of editing to be performed
+     * @return true if the operation succeeds, false otherwise
+     */
+    private boolean parseAndEdit(DataNode node, DeviceId deviceId,
+                                 ResourceId resourceId,
+                                 NetconfTranslator.OperationType operationType) {
+        try {
+            return netconfTranslator.editDeviceConfig(
+                    deviceId,
+                    DefaultResourceData.builder()
+                            .addDataNode(node)
+                            .resourceId(resourceId)
+                            .build(),
+                    operationType);
+        } catch (IOException e) {
+            e.printStackTrace();
+            return false;
+        }
+    }
+
+    /**
+     * Retrieves device id from Data node.
+     *
+     * @param node the node associated with the event
+     * @return the deviceId of the effected device
+     */
+    public DeviceId getDeviceId(DataNode node) {
+        String[] temp;
+        String ip, port;
+        if (node.type() == DataNode.Type.SINGLE_INSTANCE_LEAF_VALUE_NODE) {
+            temp = ((LeafNode) node).asString().split("\\:");
+            if (temp.length != 3) {
+                throw new RuntimeException(new NetconfException("Invalid device id form, cannot apply"));
+            }
+            ip = temp[1];
+            port = temp[2];
+        } else {
+            throw new RuntimeException(new NetconfException("Invalid device id type, cannot apply"));
+        }
+        try {
+            return DeviceId.deviceId(new URI("netconf", ip + ":" + port, (String) null));
+        } catch (URISyntaxException var4) {
+            throw new IllegalArgumentException("Unable to build deviceID for device " + ip + ":" + port, var4);
+        }
+    }
+
+    /**
+     * Inititates a Netconf connection to the device.
+     *
+     * @param deviceId of the added device
+     */
+    private void initiateConnection(DeviceId deviceId) {
+        if (controller.getNetconfDevice(deviceId) == null) {
+            try {
+                //if (this.isReachable(deviceId)) {
+                    this.controller.connectDevice(deviceId);
+                //}
+            } catch (Exception ex) {
+                throw new RuntimeException(new NetconfException("Can\'t " +
+                        "connect to NETCONF device on " + deviceId + ":" + deviceId, ex));
+            }
+        }
+    }
+}
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