Bug -3221 : Adding a new DataStoreUnavailableException for external applications.

If cluster member, which is a leader of one or multiple shards becomes unavailable,
Shard re-election happens after certain time period and anyone tries to access datastore,
receives akka.timeout exception. No application can act upon such exception.

DataStoreUnavailableException will help external applications to retry if they see this exception.

Change-Id: Iceb10580bbe73ae91dc8abb4bc6a183cb4fad6f8
Signed-off-by: Harman Singh <harmasin@cisco.com>

diff --git a/opendaylight/md-sal/sal-common-api/src/main/java/org/opendaylight/controller/md/sal/common/api/data/DataStoreUnavailableException.java b/opendaylight/md-sal/sal-common-api/src/main/java/org/opendaylight/controller/md/sal/common/api/data/DataStoreUnavailableException.java
new file mode 100644 (file)
index 0000000..ebbd116
--- /dev/null
+++ b/opendaylight/md-sal/sal-common-api/src/main/java/org/opendaylight/controller/md/sal/common/api/data/DataStoreUnavailableException.java
@@ -0,0 +1,23 @@
+/*
+ * 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.md.sal.common.api.data;
+
+/**
+ * This exception occurs if the datastore is temporarily unavailable.
+ * A retry of the transaction may succeed after a period of time
+ */
+
+public class DataStoreUnavailableException extends Exception {
+    private static final long serialVersionUID = 1L;
+
+    public DataStoreUnavailableException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+
+}