Make OpenFlow port configurable via cfg command

Example:
cfg set org.onosproject.openflow.controller.impl.OpenFlowControllerImpl openflowPort 6633

Change-Id: I2fa4b0db671003d0b357e63df619f1b0dec38e03

@@ -55,6 +55,10 @@
                 <groupId>org.apache.felix</groupId>
                 <artifactId>maven-scr-plugin</artifactId>
             </plugin>
+            <plugin>
+                <groupId>org.onosproject</groupId>
+                <artifactId>onos-maven-plugin</artifactId>
+            </plugin>
         </plugins>
     </build>
 

@@ -15,6 +15,7 @@
  */
 package org.onosproject.openflow.controller.impl;
 
+import com.google.common.base.Strings;
 import com.google.common.collect.ArrayListMultimap;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Multimap;
@@ -22,9 +23,11 @@ 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.Modified;
+import org.apache.felix.scr.annotations.Property;
 import org.apache.felix.scr.annotations.Reference;
 import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.apache.felix.scr.annotations.Service;
+import org.onosproject.cfg.ComponentConfigService;
 import org.onosproject.net.driver.DefaultDriverProviderService;
 import org.onosproject.net.driver.DriverService;
 import org.onosproject.openflow.controller.DefaultOpenFlowPacketContext;
@@ -77,11 +80,14 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 
+import static org.onlab.util.Tools.get;
 import static org.onlab.util.Tools.groupedThreads;
 
 @Component(immediate = true)
 @Service
 public class OpenFlowControllerImpl implements OpenFlowController {
+    private static final int DEFAULT_OFPORT = 6633;
+    private static final int DEFAULT_WORKER_THREADS = 16;
 
     private static final Logger log =
             LoggerFactory.getLogger(OpenFlowControllerImpl.class);
@@ -93,6 +99,17 @@ public class OpenFlowControllerImpl implements OpenFlowController {
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     protected DefaultDriverProviderService defaultDriverProviderService;
 
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected ComponentConfigService cfgService;
+
+    @Property(name = "openflowPort", intValue = DEFAULT_OFPORT,
+            label = "Port number used by OpenFlow protocol; default is 6633")
+    private int openflowPort = DEFAULT_OFPORT;
+
+    @Property(name = "workerThreads", intValue = DEFAULT_WORKER_THREADS,
+            label = "Number of controller worker threads; default is 16")
+    private int workerThreads = DEFAULT_WORKER_THREADS;
+
     private final ExecutorService executorMsgs =
         Executors.newFixedThreadPool(32, groupedThreads("onos/of", "event-stats-%d"));
 
@@ -130,6 +147,7 @@ public class OpenFlowControllerImpl implements OpenFlowController {
 
     @Activate
     public void activate(ComponentContext context) {
+        cfgService.registerProperties(getClass());
         Map<String, String> properties = readComponentConfiguration(context);
         ctrl.setConfigParams(properties);
         ctrl.start(agent, driverService);
@@ -137,6 +155,7 @@ public class OpenFlowControllerImpl implements OpenFlowController {
 
     @Deactivate
     public void deactivate() {
+        cfgService.unregisterProperties(getClass(), false);
         ctrl.stop();
     }
 
@@ -148,22 +167,26 @@ public class OpenFlowControllerImpl implements OpenFlowController {
     private Map<String, String> readComponentConfiguration(ComponentContext context) {
         Dictionary<?, ?> properties = context.getProperties();
         Map<String, String> outProperties = new HashMap<>();
-        try {
-            String strDpid = (String) properties.get("corsaDpid");
-            if (strDpid != null) {
-                outProperties.put("corsaDpid", strDpid);
-            }
-        } catch (ClassCastException e) {
-            return outProperties;
+
+        String port = get(properties, "openflowPort");
+        if (!Strings.isNullOrEmpty(port)) {
+            outProperties.put("openflowport", port);
         }
+
+        String thread = get(properties, "workerThreads");
+        if (!Strings.isNullOrEmpty(thread)) {
+            outProperties.put("workerthreads", thread);
+        }
+
         return outProperties;
     }
 
     @Modified
     public void modified(ComponentContext context) {
-        // Blank @Modified method to catch modifications to the context.
-        // If no @Modified method exists, @Activate is called again
-        // when the context is modified.
+        Map<String, String> properties = readComponentConfiguration(context);
+        ctrl.stop();
+        ctrl.setConfigParams(properties);
+        ctrl.start(agent, driverService);
     }
 
     @Override