/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search licenses this
* file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.cluster.routing.allocation;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.common.collect.Lists;
import org.elasticsearch.common.collect.Maps;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Streamable;
import org.elasticsearch.index.shard.ShardId;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
* @author kimchy (shay.banon)
*/
public class AllocationExplanation implements Streamable {
public static final AllocationExplanation EMPTY = new AllocationExplanation();
public static class NodeExplanation {
private final DiscoveryNode node;
private final String description;
public NodeExplanation(DiscoveryNode node, String description) {
this.node = node;
this.description = description;
}
public DiscoveryNode node() {
return node;
}
public String description() {
return description;
}
}
private final Map<ShardId, List<NodeExplanation>> explanations = Maps.newHashMap();
public AllocationExplanation add(ShardId shardId, NodeExplanation nodeExplanation) {
List<NodeExplanation> list = explanations.get(shardId);
if (list == null) {
list = Lists.newArrayList();
explanations.put(shardId, list);
}
list.add(nodeExplanation);
return this;
}
public Map<ShardId, List<NodeExplanation>> explanations() {
return this.explanations;
}
public static AllocationExplanation readAllocationExplanation(StreamInput in) throws IOException {
AllocationExplanation e = new AllocationExplanation();
e.readFrom(in);
return e;
}
@Override public void readFrom(StreamInput in) throws IOException {
int size = in.readVInt();
for (int i = 0; i < size; i++) {
ShardId shardId = ShardId.readShardId(in);
int size2 = in.readVInt();
List<NodeExplanation> ne = Lists.newArrayListWithCapacity(size2);
for (int j = 0; j < size2; j++) {
DiscoveryNode node = null;
if (in.readBoolean()) {
node = DiscoveryNode.readNode(in);
}
ne.add(new NodeExplanation(node, in.readUTF()));
}
explanations.put(shardId, ne);
}
}
@Override public void writeTo(StreamOutput out) throws IOException {
out.writeVInt(explanations.size());
for (Map.Entry<ShardId, List<NodeExplanation>> entry : explanations.entrySet()) {
entry.getKey().writeTo(out);
out.writeVInt(entry.getValue().size());
for (NodeExplanation nodeExplanation : entry.getValue()) {
if (nodeExplanation.node() == null) {
out.writeBoolean(false);
} else {
out.writeBoolean(true);
nodeExplanation.node().writeTo(out);
}
out.writeUTF(nodeExplanation.description());
}
}
}
}