Refactor: split api from SONA simple fabric

Change-Id: Icbdb10b730af29057097b14df8ddc377f4107853
diff --git a/apps/simplefabric/api/src/main/java/org/onosproject/simplefabric/api/SimpleFabricService.java b/apps/simplefabric/api/src/main/java/org/onosproject/simplefabric/api/SimpleFabricService.java
new file mode 100644
index 0000000..18464dc
--- /dev/null
+++ b/apps/simplefabric/api/src/main/java/org/onosproject/simplefabric/api/SimpleFabricService.java
@@ -0,0 +1,189 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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.simplefabric.api;
+
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.VlanId;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.event.ListenerService;
+import org.onosproject.net.intf.Interface;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.Host;
+
+import java.io.OutputStream;
+import java.util.Set;
+import java.util.Collection;
+
+/**
+ * Provides information about the routing configuration.
+ */
+public interface SimpleFabricService
+        extends ListenerService<SimpleFabricEvent, SimpleFabricListener> {
+
+    // App symbols
+    static final String APP_ID = "org.onosproject.simplefabric";
+    static final String L2FORWARD_APP_ID = "org.onosproject.simplefabric.l2forward";
+    static final String REACTIVE_APP_ID = "org.onosproject.simplefabric.reactive";
+
+    // Priority for l2NetworkRouting: L2NETWORK_UNICAST or L2NETWORK_BROADCAST
+    static final int PRI_L2NETWORK_UNICAST = 601;
+    static final int PRI_L2NETWORK_BROADCAST = 600;
+
+    // Reactive Routing within Local Subnets
+    // ASSUME: local subnets NEVER overlaps each other
+    static final int PRI_REACTIVE_LOCAL_FORWARD = 501;
+    static final int PRI_REACTIVE_LOCAL_INTERCEPT = 500;
+    // Reactive Routing for Border Routes with local subnet
+    // Priority: REACTIVE_BROUTE_BASE + routeIpPrefix * REACTIVE_BROUTE_STEP
+    //           + REACTIVE_BROUTE_FORWARD or REACTIVE_BROUTE_INTERCEPT
+    static final int PRI_REACTIVE_BORDER_BASE = 100;
+    static final int PRI_REACTIVE_BORDER_STEP = 2;
+    static final int PRI_REACTIVE_BORDER_FORWARD = 1;
+    static final int PRI_REACTIVE_BORDER_INTERCEPT = 0;
+
+    // Simple fabric event related timers
+    static final long IDLE_INTERVAL_MSEC = 5000;
+
+    // Feature control parameters
+    static final boolean ALLOW_IPV6 = false;
+    static final boolean ALLOW_ETH_ADDRESS_SELECTOR = true;
+    static final boolean REACTIVE_SINGLE_TO_SINGLE = false;
+    static final boolean REACTIVE_ALLOW_LINK_CP = false;  // MUST BE false (yjlee, 2017-10-18)
+    static final boolean REACTIVE_HASHED_PATH_SELECTION = false;
+    static final boolean REACTIVE_MATCH_IP_PROTO = false;
+
+    /**
+     * Gets appId.
+     *
+     * @return appId of simple fabric app
+     */
+    ApplicationId getAppId();
+
+    /**
+     * Gets all the l2Networks.
+     *
+     * @return all the l2Networks
+     */
+    Collection<L2Network> getL2Networks();
+
+    /**
+     * Retrieves the entire set of ipSubnets configuration.
+     *
+     * @return all the ipSubnets
+     */
+    Set<IpSubnet> getIpSubnets();
+
+    /**
+     * Retrieves the entire set of static routes to outer networks.
+     *
+     * @return the set of static routes to outer networks.
+     */
+    Set<Route> getBorderRoutes();
+
+    /**
+     * Evaluates whether a mac is of Virtual Gateway Mac Addresses.
+     *
+     * @param mac the MacAddress to evaluate
+     * @return true if the mac is of any Vitrual Gateway Mac Address of ipSubnets
+     */
+    boolean isVMac(MacAddress mac);
+
+    /**
+     * Evaluates whether an Interface belongs to l2Networks.
+     *
+     * @param intf the interface to evaluate
+     * @return true if the inteface belongs to l2Networks configed, otherwise false
+     */
+    boolean isL2NetworkInterface(Interface intf);
+
+    /**
+     * Find Virtual Gateway Mac Address for Local Subnet Virtual Gateway Ip.
+     *
+     * @param ip the ip to check for Virtual Gateway Ip
+     * @return mac address of virtual gateway
+     */
+    MacAddress findVMacForIp(IpAddress ip);
+
+    /**
+     * Finds the L2 Network with given port and vlanId.
+     *
+     * @param port the port to be matched
+     * @param vlanId the vlanId to be matched
+     * @return the L2 Network for specific port and vlanId or null
+     */
+    L2Network findL2Network(ConnectPoint port, VlanId vlanId);
+
+    /**
+     * Finds the L2 Network of the name.
+     *
+     * @param name the name to be matched
+     * @return the L2 Network for specific name
+     */
+    L2Network findL2Network(String name);
+
+    /**
+     * Finds the IpSubnet containing the ipAddress.
+     *
+     * @param ipAddress the ipAddress to be matched
+     * @return the IpSubnet for specific ipAddress
+     */
+    IpSubnet findIpSubnet(IpAddress ipAddress);
+
+    /**
+     * Finds the Border Route containing the ipAddress.
+     * ASSUME: ipAddress is out of ipSubnets
+     *
+     * @param ipAddress the ipAddress to be matched
+     * @return the IpSubnet for specific ipAddress
+     */
+    Route findBorderRoute(IpAddress ipAddress);
+
+    /**
+     * Finds the network interface related to the host.
+     *
+     * @param host the host
+     * @return the interface related to the host
+     */
+    Interface findHostInterface(Host host);
+
+    /**
+     * Sends Neighbour Query (ARP or NDP) to Find Host Location.
+     *
+     * @param ip the ip address to resolve
+     * @return true if request mac packets are emitted. otherwise false
+     */
+    boolean requestMac(IpAddress ip);
+
+    /**
+     * Sends Dump Event to all SimpleFabricListeners to Dump Info on the Subject.
+     *
+     * @param subject the subject to dump
+     * @param out the output stream to dump
+     */
+    void dumpToStream(String subject, OutputStream out);
+
+    /**
+     * Triggers to send Refresh Notification to all sub modules.
+     */
+    void triggerRefresh();
+
+    /**
+     * Triggers to send Flush Notification to all sub modules.
+     */
+    void triggerFlush();
+
+}