Implementation for enabling remote rpc calls between 2 instances of md-sal

[controller.git] / opendaylight / md-sal / sal-dom-api / src / main / java / org / opendaylight / controller / sal / core / api / AbstractProvider.java

diff --git a/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/sal/core/api/AbstractProvider.java b/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/sal/core/api/AbstractProvider.java
index 621ef92132a636aabc347e87b69f6b8ac89c3c8f..1cb1a2bc8522b65301e3f70470e2c41e06d3b32c 100644 (file)
--- a/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/sal/core/api/AbstractProvider.java
+++ b/opendaylight/md-sal/sal-dom-api/src/main/java/org/opendaylight/controller/sal/core/api/AbstractProvider.java
@@ -10,16 +10,20 @@ package org.opendaylight.controller.sal.core.api;
 import java.util.Collection;
 import java.util.Collections;
 
+import javax.naming.Context;
+
 import org.opendaylight.controller.sal.core.api.Broker.ProviderSession;
 import org.osgi.framework.BundleActivator;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.ServiceReference;
+import org.osgi.util.tracker.ServiceTracker;
+import org.osgi.util.tracker.ServiceTrackerCustomizer;
 
-public abstract class AbstractProvider implements BundleActivator, Provider {
+public abstract class AbstractProvider implements BundleActivator, Provider,ServiceTrackerCustomizer<Broker, Broker> {
 
-    private ServiceReference<Broker> brokerRef;
     private Broker broker;
-
+    private BundleContext context;
+    private ServiceTracker<Broker, Broker> tracker;
     @Override
     public Collection<ProviderFunctionality> getProviderFunctionality() {
         return Collections.emptySet();
@@ -27,12 +31,10 @@ public abstract class AbstractProvider implements BundleActivator, Provider {
 
     @Override
     public final void start(BundleContext context) throws Exception {
-        brokerRef = context.getServiceReference(Broker.class);
-        broker = context.getService(brokerRef);
-
+        this.context = context;
         this.startImpl(context);
-
-        broker.registerProvider(this,context);
+        tracker = new ServiceTracker<>(context, Broker.class, this);
+        tracker.open();
     }
 
     protected void startImpl(BundleContext context) {
@@ -44,7 +46,31 @@ public abstract class AbstractProvider implements BundleActivator, Provider {
 
     @Override
     public final void stop(BundleContext context) throws Exception {
+        broker = null;
+        tracker.close();
+        tracker = null;
         stopImpl(context);
     }
 
+    @Override
+    public Broker addingService(ServiceReference<Broker> reference) {
+        if(broker == null) {
+            broker = context.getService(reference);
+            broker.registerProvider(this, context);
+            return broker;
+        }
+        
+        return null;
+    }
+    
+    @Override
+    public void modifiedService(ServiceReference<Broker> reference, Broker service) {
+        // NOOP
+    }
+    
+    @Override
+    public void removedService(ServiceReference<Broker> reference, Broker service) {
+        stopImpl(context);
+    }
+    
 }