Guards iteration against concurrent modification

- fix or it would throw a ConcurrentModificationException.
Change-Id: I39664b2238ef62d2add96cb76ac8c2113cfc2265
Signed-off-by: Jie Han <han.jie@zte.com.cn>

diff --git a/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/sal/dom/broker/BrokerImpl.java b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/sal/dom/broker/BrokerImpl.java
index 33fc2446196d5473f9742883155b92d25110fc77..7998bdecdd1847f6e86bdf28c5a40efda80b6112 100644 (file)
--- a/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/sal/dom/broker/BrokerImpl.java
+++ b/opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/sal/dom/broker/BrokerImpl.java
@@ -79,9 +79,11 @@ public class BrokerImpl implements Broker, DOMRpcProviderService, DOMRpcService,
     // Validation
     private void checkPredicates(final Provider prov) {
         Preconditions.checkNotNull(prov, "Provider should not be null.");
-        for (final ProviderContextImpl session : providerSessions) {
-            if (prov.equals(session.getProvider())) {
-                throw new IllegalStateException("Provider already registered");
+        synchronized (providerSessions) {
+            for (final ProviderContextImpl session : providerSessions) {
+                if (prov.equals(session.getProvider())) {
+                    throw new IllegalStateException("Provider already registered");
+                }
             }
         }
 
@@ -89,9 +91,11 @@ public class BrokerImpl implements Broker, DOMRpcProviderService, DOMRpcService,
 
     private void checkPredicates(final Consumer cons) {
         Preconditions.checkNotNull(cons, "Consumer should not be null.");
-        for (final ConsumerContextImpl session : sessions) {
-            if (cons.equals(session.getConsumer())) {
-                throw new IllegalStateException("Consumer already registered");
+        synchronized (sessions) {
+            for (final ConsumerContextImpl session : sessions) {
+                if (cons.equals(session.getConsumer())) {
+                    throw new IllegalStateException("Consumer already registered");
+                }
             }
         }
     }