opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/impl/PrefixLeaderHandler.java

   1 /*
   2  * Copyright (c) 2017 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.clustering.it.provider.impl;
  10
  11 import com.google.common.util.concurrent.Futures;
  12 import com.google.common.util.concurrent.ListenableFuture;
  13 import java.util.Collections;
  14 import java.util.concurrent.CompletionStage;
  15 import org.opendaylight.controller.cluster.dom.api.CDSDataTreeProducer;
  16 import org.opendaylight.controller.cluster.dom.api.CDSShardAccess;
  17 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
  18 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  19 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  20 import org.opendaylight.mdsal.dom.api.DOMDataTreeProducerException;
  21 import org.opendaylight.mdsal.dom.api.DOMDataTreeService;
  22 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.BecomePrefixLeaderInput;
  23 import org.opendaylight.yangtools.yang.common.RpcResult;
  24 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  25 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 public class PrefixLeaderHandler {
  30
  31     private static final Logger LOG = LoggerFactory.getLogger(PrefixLeaderHandler.class);
  32
  33     private final DOMDataTreeService domDataTreeService;
  34     private final BindingNormalizedNodeSerializer serializer;
  35
  36     public PrefixLeaderHandler(final DOMDataTreeService domDataTreeService,
  37                                final BindingNormalizedNodeSerializer serializer) {
  38         this.domDataTreeService = domDataTreeService;
  39         this.serializer = serializer;
  40     }
  41
  42     public ListenableFuture<RpcResult<Void>> makeLeaderLocal(final BecomePrefixLeaderInput input) {
  43
  44         final YangInstanceIdentifier yid = serializer.toYangInstanceIdentifier(input.getPrefix());
  45         final DOMDataTreeIdentifier prefix = new DOMDataTreeIdentifier(LogicalDatastoreType.CONFIGURATION, yid);
  46
  47         try (final CDSDataTreeProducer producer =
  48                      (CDSDataTreeProducer) domDataTreeService.createProducer(Collections.singleton(prefix))) {
  49
  50             final CDSShardAccess shardAccess = producer.getShardAccess(prefix);
  51
  52             final CompletionStage<Void> completionStage = shardAccess.makeLeaderLocal();
  53
  54             completionStage.exceptionally(throwable -> {
  55                 LOG.error("Leader movement failed.", throwable);
  56                 return null;
  57             });
  58         } catch (final DOMDataTreeProducerException e) {
  59             LOG.warn("Error while closing producer", e);
  60         }
  61
  62         return Futures.immediateFuture(RpcResultBuilder.<Void>success().build());
  63     }
  64 }