BUG 2676 : Introduce API for accessing akka dispatchers

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / utils / Dispatchers.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/utils/Dispatchers.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/utils/Dispatchers.java
new file mode 100644 (file)
index 0000000..8de8a9d
--- /dev/null
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/utils/Dispatchers.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.cluster.datastore.utils;
+
+import com.google.common.base.Preconditions;
+import scala.concurrent.ExecutionContext;
+
+public class Dispatchers {
+    public static final String DEFAULT_DISPATCHER_PATH = "akka.actor.default-dispatcher";
+    public static final String CLIENT_DISPATCHER_PATH = "client-dispatcher";
+    public static final String TXN_DISPATCHER_PATH = "txn-dispatcher";
+    public static final String SHARD_DISPATCHER_PATH = "shard-dispatcher";
+    public static final String NOTIFICATION_DISPATCHER_PATH = "notification-dispatcher";
+
+    private final akka.dispatch.Dispatchers dispatchers;
+
+    public static enum DispatcherType {
+        Client(CLIENT_DISPATCHER_PATH),
+        Transaction(TXN_DISPATCHER_PATH),
+        Shard(SHARD_DISPATCHER_PATH),
+        Notification(NOTIFICATION_DISPATCHER_PATH);
+
+        private final String path;
+        private DispatcherType(String path){
+            this.path = path;
+        }
+        private String path(akka.dispatch.Dispatchers dispatchers){
+            if(dispatchers.hasDispatcher(path)){
+                return path;
+            }
+            return DEFAULT_DISPATCHER_PATH;
+        }
+
+        private ExecutionContext dispatcher(akka.dispatch.Dispatchers dispatchers){
+            if(dispatchers.hasDispatcher(path)){
+                return dispatchers.lookup(path);
+            }
+            return dispatchers.defaultGlobalDispatcher();
+        }
+    }
+
+    public Dispatchers(akka.dispatch.Dispatchers dispatchers){
+        Preconditions.checkNotNull(dispatchers, "dispatchers should not be null");
+        this.dispatchers = dispatchers;
+    }
+
+    public ExecutionContext getDispatcher(DispatcherType dispatcherType){
+        return dispatcherType.dispatcher(this.dispatchers);
+    }
+
+    public String getDispatcherPath(DispatcherType dispatcherType){
+        return dispatcherType.path(this.dispatchers);
+    }
+}