Fault tolerance module based on events, now it is event driven.

Switch roles from floodlightdefault.properties.

Fault tolerance with primary-backup or distributed, without reconfiguration.
One time crashed the controller shall restart with all switches in slave mode.
This can be achieved from floodlight.properties file.

The second properties file, floodlighBackupNode.properties is for backup nodes, and swicthes shall be configures in slave mode.

Regards

src/main/java/net/floodlightcontroller/core/internal/OFChannelHandler.java

@@ -688,7 +688,7 @@ class OFChannelHandler extends SimpleChannelInboundHandler<Iterable<OFMessage>>
 
 	@Override
 	public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
-		//log.debug("channelIdle on OFChannelHandler {}", String.format("%08x", System.identityHashCode(this)));
+		log.debug("channelIdle on OFChannelHandler {}", String.format("%08x", System.identityHashCode(this)));
 		OFChannelHandler handler = ctx.pipeline().get(OFChannelHandler.class);
 		handler.sendEchoRequest();
 	}

src/main/java/org/sdnplatform/sync/ISyncService.java

@@ -143,8 +143,10 @@ public interface ISyncService extends IFloodlightService {
     
    
     /**
-     * Listener to RPC connections, used in simple Fault tolerance module
-     * The listener is dispatched either connected or disconnected nodes
+     * Listener to RPC connections, used in simple Fault tolerance module,
+     * or other modules that need cluster monitor nodes (connect and disconnect).
+     * The listener is dispatched at connected or disconnected events.
+     * The listener inform the node id of connected or disconnected nodes on cluster.
      * @param listener
      */
 	public void addRPCListener(IRPCListener listener);

src/main/java/org/sdnplatform/sync/internal/rpc/IRPCListener.java

@@ -13,7 +13,15 @@ package org.sdnplatform.sync.internal.rpc;
 
 public interface IRPCListener {
 	
+	/**
+	 * Inform to listeners when a node is disconnected.
+	 * @param nodeId
+	 */
 	public void disconnectedNode(Short nodeId);
-
+	
+	/**
+	 * Inform to listeners when a node is connected.
+	 * @param nodeId
+	 */
 	public void connectedNode(Short nodeId);
 }

src/main/resources/logback-test.xml

@@ -22,7 +22,7 @@
   <logger name="net.floodlightcontroller.devicemanager" level="INFO"></logger>
   <logger name="net.floodlightcontroller.linkdiscovery" level="INFO"></logger>
   <logger name="net.floodlightcontroller.forwarding" level="INFO"></logger>
-  <logger name="net.floodlightcontroller.simpleft.FT" level="TRACE"></logger>
+  <logger name="net.floodlightcontroller.simpleft.FT" level="INFO"></logger>
   <logger name="net.floodlightcontroller.core" level="INFO"></logger>
   <logger name="net.floodlightcontroller.topology" level="INFO" ></logger>
   <logger name="org.projectfloodlight.openflow" level="INFO" ></logger>