X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-dom-api%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fsal%2Fcore%2Fapi%2FAbstractConsumer.java;h=46e9cdcd718917c4f26f33647eb1bf197a477d3f;hp=99a38ca43a5be68fd3c9bad328e20ab98d0578a4;hb=e2607370f5ac443a5a2f1f00f693f82a0b57161d;hpb=03abf047ba966c53f4901d36ae5198156d66dc05

diff --git a/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/sal/core/api/AbstractConsumer.java b/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/sal/core/api/AbstractConsumer.java
index 99a38ca43a..46e9cdcd71 100644
--- a/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/sal/core/api/AbstractConsumer.java
+++ b/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/sal/core/api/AbstractConsumer.java
@@ -9,7 +9,6 @@ package org.opendaylight.controller.sal.core.api;
 
 import java.util.Collection;
 import java.util.Collections;
-
 import org.osgi.framework.BundleActivator;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.ServiceReference;
@@ -18,34 +17,33 @@ import org.osgi.util.tracker.ServiceTrackerCustomizer;
 
 public abstract class AbstractConsumer implements Consumer, BundleActivator,ServiceTrackerCustomizer<Broker, Broker> {
 
-    
-    
-    
     private BundleContext context;
     private ServiceTracker<Broker, Broker> tracker;
     private Broker broker;
 
     @Override
-    public final void start(BundleContext context) throws Exception {
-        this.context = context;
-        this.startImpl(context);
-        tracker = new ServiceTracker<>(context, Broker.class, this);
+    public final void start(final BundleContext bundleContext) throws Exception {
+        this.context = bundleContext;
+        this.startImpl(bundleContext);
+        tracker = new ServiceTracker<>(bundleContext, Broker.class, this);
         tracker.open();
     }
 
-
-
     @Override
-    public final void stop(BundleContext context) throws Exception {
-        stopImpl(context);
+    public final void stop(final BundleContext bundleContext) throws Exception {
+        stopImpl(bundleContext);
         broker = null;
-        tracker.close();
+
+        if (tracker != null) {
+            tracker.close();
+        }
     }
 
-    protected void startImpl(BundleContext context) {
+    protected void startImpl(final BundleContext bundleContext) {
         // NOOP
     }
-    protected void stopImpl(BundleContext context) {
+
+    protected void stopImpl(final BundleContext bundleContext) {
         // NOOP
     }
 
@@ -54,25 +52,25 @@ public abstract class AbstractConsumer implements Consumer, BundleActivator,Serv
         return Collections.emptySet();
     }
 
-    
+
     @Override
-    public Broker addingService(ServiceReference<Broker> reference) {
-        if(broker == null) {
+    public Broker addingService(final ServiceReference<Broker> reference) {
+        if (broker == null && context != null) {
             broker = context.getService(reference);
             broker.registerConsumer(this, context);
             return broker;
         }
-        
+
         return null;
     }
-    
+
     @Override
-    public void modifiedService(ServiceReference<Broker> reference, Broker service) {
+    public void modifiedService(final ServiceReference<Broker> reference, final Broker service) {
         // NOOP
     }
-    
+
     @Override
-    public void removedService(ServiceReference<Broker> reference, Broker service) {
+    public void removedService(final ServiceReference<Broker> reference, final Broker service) {
         stopImpl(context);
     }
 }