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.datastore.exceptions.TimeoutException;
  16 import org.opendaylight.controller.cluster.dom.api.CDSDataTreeProducer;
  17 import org.opendaylight.controller.cluster.dom.api.CDSShardAccess;
  18 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
  19 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  20 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  21 import org.opendaylight.mdsal.dom.api.DOMDataTreeProducerException;
  22 import org.opendaylight.mdsal.dom.api.DOMDataTreeService;
  23 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.BecomePrefixLeaderInput;
  24 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.BecomePrefixLeaderOutput;
  25 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.BecomePrefixLeaderOutputBuilder;
  26 import org.opendaylight.yangtools.yang.common.RpcError;
  27 import org.opendaylight.yangtools.yang.common.RpcResult;
  28 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  29 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 public class PrefixLeaderHandler {
  34
  35     private static final Logger LOG = LoggerFactory.getLogger(PrefixLeaderHandler.class);
  36
  37     private final DOMDataTreeService domDataTreeService;
  38     private final BindingNormalizedNodeSerializer serializer;
  39
  40     public PrefixLeaderHandler(final DOMDataTreeService domDataTreeService,
  41                                final BindingNormalizedNodeSerializer serializer) {
  42         this.domDataTreeService = domDataTreeService;
  43         this.serializer = serializer;
  44     }
  45
  46     public ListenableFuture<RpcResult<BecomePrefixLeaderOutput>> makeLeaderLocal(final BecomePrefixLeaderInput input) {
  47
  48         final YangInstanceIdentifier yid = serializer.toYangInstanceIdentifier(input.getPrefix());
  49         final DOMDataTreeIdentifier prefix = new DOMDataTreeIdentifier(LogicalDatastoreType.CONFIGURATION, yid);
  50
  51         try (CDSDataTreeProducer producer =
  52                      (CDSDataTreeProducer) domDataTreeService.createProducer(Collections.singleton(prefix))) {
  53
  54             final CDSShardAccess shardAccess = producer.getShardAccess(prefix);
  55
  56             final CompletionStage<Void> completionStage = shardAccess.makeLeaderLocal();
  57
  58             completionStage.exceptionally(throwable -> {
  59                 LOG.error("Leader movement failed.", throwable);
  60                 return null;
  61             });
  62         } catch (final DOMDataTreeProducerException e) {
  63             LOG.warn("Error while closing producer", e);
  64         } catch (final TimeoutException e) {
  65             LOG.warn("Timeout while on producer operation", e);
  66             Futures.immediateFuture(RpcResultBuilder.failed().withError(RpcError.ErrorType.RPC,
  67                     "resource-denied-transport", "Timeout while opening producer please retry.", "clustering-it",
  68                     "clustering-it", e));
  69         }
  70
  71         return Futures.immediateFuture(RpcResultBuilder.success(new BecomePrefixLeaderOutputBuilder().build()).build());
  72     }
  73 }