Support user-provided timeouts in intra-cluster communication service

Change-Id: I4ed9cd2e84df83b45ae17af24b9780b9ac97a95d
diff --git a/core/store/dist/src/main/java/org/onosproject/store/flow/impl/DeviceFlowTable.java b/core/store/dist/src/main/java/org/onosproject/store/flow/impl/DeviceFlowTable.java
index 0ffd59c..f3206c3 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/flow/impl/DeviceFlowTable.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/flow/impl/DeviceFlowTable.java
@@ -15,6 +15,7 @@
  */
 package org.onosproject.store.flow.impl;
 
+import java.time.Duration;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedList;
@@ -73,6 +74,7 @@
         .register(LogicalTimestamp.class)
         .register(Timestamped.class)
         .build());
+    private static final int GET_FLOW_ENTRIES_TIMEOUT = 15; // seconds
 
     private final Logger log = LoggerFactory.getLogger(getClass());
 
@@ -243,7 +245,8 @@
                 getFlowsSubject,
                 SERIALIZER::encode,
                 SERIALIZER::decode,
-                replicaInfo.master());
+                replicaInfo.master(),
+                Duration.ofSeconds(GET_FLOW_ENTRIES_TIMEOUT));
         } else {
             return CompletableFuture.completedFuture(Collections.emptySet());
         }
diff --git a/core/store/dist/src/main/java/org/onosproject/store/flow/impl/ECFlowRuleStore.java b/core/store/dist/src/main/java/org/onosproject/store/flow/impl/ECFlowRuleStore.java
index 9a68356..b4e80a8 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/flow/impl/ECFlowRuleStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/flow/impl/ECFlowRuleStore.java
@@ -136,6 +136,7 @@
     private final Logger log = getLogger(getClass());
 
     private static final long FLOW_RULE_STORE_TIMEOUT_MILLIS = 5000;
+    private static final int GET_FLOW_ENTRIES_TIMEOUT = 30; //seconds
 
     /** Number of threads in the message handler pool. */
     private int msgHandlerPoolSize = MESSAGE_HANDLER_THREAD_POOL_SIZE_DEFAULT;
@@ -783,7 +784,7 @@
         public Iterable<FlowEntry> getFlowEntries(DeviceId deviceId) {
             try {
                 return getFlowTable(deviceId).getFlowEntries()
-                    .get(FLOW_RULE_STORE_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
+                    .get(GET_FLOW_ENTRIES_TIMEOUT, TimeUnit.SECONDS);
             } catch (ExecutionException e) {
                 throw new FlowRuleStoreException(e.getCause());
             } catch (TimeoutException e) {