--- /dev/null
+/*
+ * Copyright (c) 2017 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.clustering.it.provider.impl;
+
+import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.controller.md.sal.dom.api.DOMRpcException;
+import org.opendaylight.controller.md.sal.dom.api.DOMRpcIdentifier;
+import org.opendaylight.controller.md.sal.dom.api.DOMRpcImplementation;
+import org.opendaylight.controller.md.sal.dom.api.DOMRpcImplementationRegistration;
+import org.opendaylight.controller.md.sal.dom.api.DOMRpcProviderService;
+import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
+import org.opendaylight.controller.md.sal.dom.spi.DefaultDOMRpcResult;
+import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
+import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
+import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceRegistration;
+import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
+import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableContainerNodeBuilder;
+import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableLeafNodeBuilder;
+import org.opendaylight.yangtools.yang.model.api.SchemaPath;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class SingletonGetConstantService implements DOMRpcImplementation, ClusterSingletonService {
+
+ private static final Logger LOG = LoggerFactory.getLogger(SingletonGetConstantService.class);
+
+ private static final QName OUTPUT =
+ QName.create("tag:opendaylight.org,2017:controller:yang:lowlevel:target","2017-02-15", "output");
+ private static final QName CONSTANT =
+ QName.create("tag:opendaylight.org,2017:controller:yang:lowlevel:target","2017-02-15", "constant");
+ private static final QName CONTEXT =
+ QName.create("tag:opendaylight.org,2017:controller:yang:lowlevel:target","2017-02-15", "context");
+ private static final QName GET_SINGLETON_CONSTANT =
+ QName.create("tag:opendaylight.org,2017:controller:yang:lowlevel:target","2017-02-15",
+ "get-singleton-constant");
+
+ private static final ServiceGroupIdentifier SERVICE_GROUP_IDENTIFIER =
+ ServiceGroupIdentifier.create("get-singleton-constant-service");
+
+ private final DOMRpcProviderService rpcProviderService;
+ private final String constant;
+ private DOMRpcImplementationRegistration<SingletonGetConstantService> rpcRegistration;
+
+ private SingletonGetConstantService(final DOMRpcProviderService rpcProviderService,
+ final String constant) {
+
+
+ this.rpcProviderService = rpcProviderService;
+ this.constant = constant;
+ }
+
+ public static ClusterSingletonServiceRegistration registerNew(final ClusterSingletonServiceProvider singletonService,
+ final DOMRpcProviderService rpcProviderService,
+ final String constant) {
+ LOG.debug("Registering get-singleton-constant into ClusterSingletonService, value {}", constant);
+
+ return singletonService
+ .registerClusterSingletonService(new SingletonGetConstantService(rpcProviderService, constant));
+ }
+
+ @Nonnull
+ @Override
+ public CheckedFuture<DOMRpcResult, DOMRpcException> invokeRpc(@Nonnull DOMRpcIdentifier rpc, @Nullable NormalizedNode<?, ?> input) {
+ LOG.debug("get-singleton-constant invoked, current value: {}", constant);
+
+ final LeafNode<Object> value = ImmutableLeafNodeBuilder.create()
+ .withNodeIdentifier(new NodeIdentifier(CONSTANT))
+ .withValue(constant)
+ .build();
+
+ final ContainerNode result = ImmutableContainerNodeBuilder.create()
+ .withNodeIdentifier(new NodeIdentifier(OUTPUT))
+ .withChild(value)
+ .build();
+
+ return Futures.immediateCheckedFuture(new DefaultDOMRpcResult(result));
+ }
+
+ @Override
+ public void instantiateServiceInstance() {
+ LOG.debug("Gained ownership of get-singleton-constant, registering service into rpcService");
+ final DOMRpcIdentifier id = DOMRpcIdentifier.create(SchemaPath.create(true, GET_SINGLETON_CONSTANT));
+
+ rpcRegistration = rpcProviderService.registerRpcImplementation(this, id);
+ }
+
+ @Override
+ public ListenableFuture<Void> closeServiceInstance() {
+ LOG.debug("Closing get-singleton-constant instance");
+ rpcRegistration.close();
+ return Futures.immediateFuture(null);
+ }
+
+ @Override
+ public ServiceGroupIdentifier getIdentifier() {
+ return SERVICE_GROUP_IDENTIFIER;
+ }
+}