Adding code to the jarv2.5.3

Change-Id: I25fe0ff6a324aab97c13173fa406d427139970e1
Issue-ID: MUSIC-68
Signed-off-by: Vikram Potturi(apotturi) <apotturi@gmail.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/jar/src/main/java/org/onap/music/lockingservice/ZooKeeperOperation.java b/jar/src/main/java/org/onap/music/lockingservice/ZooKeeperOperation.java
new file mode 100644
index 00000000..7020d14d
--- /dev/null
+++ b/jar/src/main/java/org/onap/music/lockingservice/ZooKeeperOperation.java
@@ -0,0 +1,42 @@
+/*
+ * ============LICENSE_START==========================================
+ * org.onap.music
+ * ===================================================================
+ *  Copyright (c) 2017 AT&T Intellectual Property
+ * ===================================================================
+ *  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.
+ * 
+ * ============LICENSE_END=============================================
+ * ====================================================================
+ */
+package org.onap.music.lockingservice;
+
+import org.apache.zookeeper.KeeperException;
+
+/**
+ * A callback object which can be used for implementing retry-able operations in the 
+ * {@link org.onap.music.lockingservice.ProtocolSupport} class
+ *
+ */
+public interface ZooKeeperOperation {
+    
+    /**
+     * Performs the operation - which may be involved multiple times if the connection
+     * to ZooKeeper closes during this operation
+     *
+     * @return the result of the operation or null
+     * @throws KeeperException FILL IN
+     * @throws InterruptedException FILL IN
+     */
+    public boolean execute() throws KeeperException, InterruptedException;
+}