[Emu][ONOS-2593, ONOS-2594] BGP SBI controller and session handler

Change-Id: Ia95717ff173b2e3e1198bdd0fafef7cb0aa8f734
diff --git a/bgp/ctl/src/main/java/org/onosproject/bgp/controller/impl/BGPControllerImpl.java b/bgp/ctl/src/main/java/org/onosproject/bgp/controller/impl/BGPControllerImpl.java
new file mode 100755
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+++ b/bgp/ctl/src/main/java/org/onosproject/bgp/controller/impl/BGPControllerImpl.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2015 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.bgp.controller.impl;
+
+import static org.onlab.util.Tools.groupedThreads;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+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.Service;
+import org.onosproject.bgp.controller.BGPCfg;
+import org.onosproject.bgp.controller.BGPController;
+import org.onosproject.bgp.controller.BGPId;
+import org.onosproject.bgpio.protocol.BGPMessage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@Component(immediate = true)
+@Service
+public class BGPControllerImpl implements BGPController {
+
+    private static final Logger log = LoggerFactory.getLogger(BGPControllerImpl.class);
+
+    private final ExecutorService executorMsgs = Executors.newFixedThreadPool(32,
+                                                                              groupedThreads("onos/bgp",
+                                                                                      "event-stats-%d"));
+
+    private final ExecutorService executorBarrier = Executors.newFixedThreadPool(4,
+                                                                                 groupedThreads("onos/bgp",
+                                                                                         "event-barrier-%d"));
+
+    final Controller ctrl = new Controller(this);
+
+    private BGPConfig bgpconfig = new BGPConfig();
+
+    @Activate
+    public void activate() {
+        this.ctrl.start();
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        // Close all connected peers
+        this.ctrl.stop();
+        log.info("Stopped");
+    }
+
+    @Override
+    public void writeMsg(BGPId bgpId, BGPMessage msg) {
+        // TODO: Send message
+    }
+
+    @Override
+    public void processBGPPacket(BGPId bgpId, BGPMessage msg) {
+
+        switch (msg.getType()) {
+        case OPEN:
+            // TODO: Process Open message
+            break;
+        case KEEP_ALIVE:
+            // TODO: Process keepalive message
+            break;
+        case NOTIFICATION:
+            // TODO: Process notificatoin message
+            break;
+        case UPDATE:
+            // TODO: Process update message
+            break;
+        default:
+            // TODO: Process other message
+            break;
+        }
+    }
+
+    /**
+     * Get controller instance.
+     *
+     * @return ctrl the controller.
+     */
+    public Controller getController() {
+        return ctrl;
+    }
+
+    @Override
+    public BGPCfg getConfig() {
+        return this.bgpconfig;
+    }
+}
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