opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/impl/PrefixShardHandler.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 com.google.common.util.concurrent.SettableFuture;
  14 import java.util.Collections;
  15 import java.util.HashMap;
  16 import java.util.Map;
  17 import java.util.concurrent.CompletionStage;
  18 import java.util.stream.Collectors;
  19 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  20 import org.opendaylight.controller.cluster.sharding.DistributedShardFactory;
  21 import org.opendaylight.controller.cluster.sharding.DistributedShardFactory.DistributedShardRegistration;
  22 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
  23 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  24 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  25 import org.opendaylight.mdsal.dom.api.DOMDataTreeShardingConflictException;
  26 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.CreatePrefixShardInput;
  27 import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.RemovePrefixShardInput;
  28 import org.opendaylight.yangtools.yang.common.RpcError;
  29 import org.opendaylight.yangtools.yang.common.RpcResult;
  30 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
  31 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 public class PrefixShardHandler {
  36
  37     private static final Logger LOG = LoggerFactory.getLogger(PrefixShardHandler.class);
  38
  39     private final DistributedShardFactory shardFactory;
  40     private final BindingNormalizedNodeSerializer serializer;
  41
  42     private final Map<YangInstanceIdentifier, DistributedShardRegistration> registrations =
  43             Collections.synchronizedMap(new HashMap<>());
  44
  45     public PrefixShardHandler(final DistributedShardFactory shardFactory,
  46                               final BindingNormalizedNodeSerializer serializer) {
  47
  48         this.shardFactory = shardFactory;
  49         this.serializer = serializer;
  50     }
  51
  52     public ListenableFuture<RpcResult<Void>> onCreatePrefixShard(final CreatePrefixShardInput input) {
  53
  54         final SettableFuture<RpcResult<Void>> future = SettableFuture.create();
  55
  56         final CompletionStage<DistributedShardRegistration> completionStage;
  57         final YangInstanceIdentifier identifier = serializer.toYangInstanceIdentifier(input.getPrefix());
  58
  59         try {
  60              completionStage = shardFactory.createDistributedShard(
  61                     new DOMDataTreeIdentifier(LogicalDatastoreType.CONFIGURATION, identifier),
  62                     input.getReplicas().stream().map(MemberName::forName).collect(Collectors.toList()));
  63
  64             completionStage.thenAccept(registration -> {
  65                 LOG.debug("Shard[{}] created successfully.", identifier);
  66                 registrations.put(identifier, registration);
  67                 future.set(RpcResultBuilder.<Void>success().build());
  68             });
  69             completionStage.exceptionally(throwable -> {
  70                 LOG.warn("Shard[{}] creation failed:", identifier, throwable);
  71
  72                 final RpcError error = RpcResultBuilder.newError(RpcError.ErrorType.APPLICATION, "create-shard-failed",
  73                         "Shard creation failed", "cluster-test-app", "", throwable);
  74                 future.set(RpcResultBuilder.<Void>failed().withRpcError(error).build());
  75                 return null;
  76             });
  77         } catch (final DOMDataTreeShardingConflictException e) {
  78             LOG.warn("Unable to register shard for: {}.", identifier);
  79
  80             final RpcError error = RpcResultBuilder.newError(RpcError.ErrorType.APPLICATION, "create-shard-failed",
  81                     "Sharding conflict", "cluster-test-app", "", e);
  82             future.set(RpcResultBuilder.<Void>failed().withRpcError(error).build());
  83         }
  84
  85         return future;
  86     }
  87
  88     public ListenableFuture<RpcResult<Void>> onRemovePrefixShard(final RemovePrefixShardInput input) {
  89
  90         final YangInstanceIdentifier identifier = serializer.toYangInstanceIdentifier(input.getPrefix());
  91         final DistributedShardRegistration registration = registrations.get(identifier);
  92
  93         if (registration == null) {
  94             final RpcError error = RpcResultBuilder.newError(RpcError.ErrorType.APPLICATION, "registration-missing",
  95                     "No shard registered at this prefix.");
  96             return Futures.immediateFuture(RpcResultBuilder.<Void>failed().withRpcError(error).build());
  97         }
  98
  99         final SettableFuture<RpcResult<Void>> future = SettableFuture.create();
 100
 101         final CompletionStage<Void> close = registration.close();
 102         close.thenRun(() -> future.set(RpcResultBuilder.<Void>success().build()));
 103         close.exceptionally(throwable -> {
 104             LOG.warn("Shard[{}] removal failed:", identifier, throwable);
 105
 106             final RpcError error = RpcResultBuilder.newError(RpcError.ErrorType.APPLICATION, "remove-shard-failed",
 107                     "Shard removal failed", "cluster-test-app", "", throwable);
 108             future.set(RpcResultBuilder.<Void>failed().withRpcError(error).build());
 109             return null;
 110         });
 111
 112         return future;
 113     }
 114 }