1 files changed, 53 insertions, 0 deletions
diff --git a/framework/src/onos/apps/pim/src/main/java/org/onosproject/pim/impl/PIMTimer.java b/framework/src/onos/apps/pim/src/main/java/org/onosproject/pim/impl/PIMTimer.java
new file mode 100644
index 00000000..c131a53b
--- /dev/null
+++ b/framework/src/onos/apps/pim/src/main/java/org/onosproject/pim/impl/PIMTimer.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.pim.impl;
+
+import org.jboss.netty.util.HashedWheelTimer;
+
+/**
+ * PIM Timer used for PIM Neighbors.
+ */
+public final class PIMTimer {
+
+    private static volatile HashedWheelTimer timer;
+
+    // Ban public construction
+    private PIMTimer() {
+    }
+
+    /**
+     * Returns the singleton hashed-wheel timer.
+     *
+     * @return hashed-wheel timer
+     */
+    public static HashedWheelTimer getTimer() {
+        if (PIMTimer.timer == null) {
+            initTimer();
+        }
+        return PIMTimer.timer;
+    }
+
+    // Start the PIM timer.
+    private static synchronized  void initTimer() {
+        if (PIMTimer.timer == null) {
+
+            // Create and start a new hashed wheel timer, if it does not exist.
+            HashedWheelTimer hwTimer = new HashedWheelTimer();
+            hwTimer.start();
+            PIMTimer.timer = hwTimer;
+        }
+    }
+}