+/*
+ * 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.dom.api;
+
+import java.util.Collection;
+import java.util.EventListener;
+import javax.annotation.Nonnull;
+
+/**
+ * An {@link EventListener} used to track RPC implementations becoming (un)available
+ * to a {@link DOMRpcService}.
+ */
+public interface DOMRpcAvailabilityListener extends EventListener {
+ /**
+ * Method invoked whenever an RPC type becomes available.
+ *
+ * @param rpcs RPC types newly available
+ */
+ void onRpcAvailable(@Nonnull Collection<DOMRpcIdentifier> rpcs);
+
+ /**
+ * Method invoked whenever an RPC type becomes unavailable.
+ *
+ * @param rpcs RPC types which became unavailable
+ */
+ void onRpcUnavailable(@Nonnull Collection<DOMRpcIdentifier> rpcs);
+}