/*
 * 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.action.admin.indices.optimize;

import org.elasticsearch.ElasticSearchException;
import org.elasticsearch.action.ShardOperationFailedException;
import org.elasticsearch.action.TransportActions;
import org.elasticsearch.action.support.DefaultShardOperationFailedException;
import org.elasticsearch.action.support.broadcast.BroadcastShardOperationFailedException;
import org.elasticsearch.action.support.broadcast.TransportBroadcastOperationAction;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.routing.GroupShardsIterator;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.engine.Engine;
import org.elasticsearch.index.shard.service.IndexShard;
import org.elasticsearch.indices.IndicesService;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;

import java.util.List;
import java.util.concurrent.atomic.AtomicReferenceArray;

import static org.elasticsearch.common.collect.Lists.*;

/**
 * Optimize index/indices action.
 *
 * @author kimchy (shay.banon)
 */
public class TransportOptimizeAction extends TransportBroadcastOperationAction<OptimizeRequest, OptimizeResponse, ShardOptimizeRequest, ShardOptimizeResponse> {

    private final IndicesService indicesService;

    @Inject public TransportOptimizeAction(Settings settings, ThreadPool threadPool, ClusterService clusterService,
                                           TransportService transportService, IndicesService indicesService) {
        super(settings, threadPool, clusterService, transportService);
        this.indicesService = indicesService;
    }

    @Override protected String executor() {
        return ThreadPool.Names.CACHED;
    }

    @Override protected String transportAction() {
        return TransportActions.Admin.Indices.OPTIMIZE;
    }

    @Override protected String transportShardAction() {
        return "indices/optimize/shard";
    }

    @Override protected OptimizeRequest newRequest() {
        return new OptimizeRequest();
    }

    @Override protected boolean ignoreNonActiveExceptions() {
        return true;
    }

    @Override protected OptimizeResponse newResponse(OptimizeRequest request, AtomicReferenceArray shardsResponses, ClusterState clusterState) {
        int successfulShards = 0;
        int failedShards = 0;
        List<ShardOperationFailedException> shardFailures = null;
        for (int i = 0; i < shardsResponses.length(); i++) {
            Object shardResponse = shardsResponses.get(i);
            if (shardResponse == null) {
                // a non active shard, ignore...
            } else if (shardResponse instanceof BroadcastShardOperationFailedException) {
                failedShards++;
                if (shardFailures == null) {
                    shardFailures = newArrayList();
                }
                shardFailures.add(new DefaultShardOperationFailedException((BroadcastShardOperationFailedException) shardResponse));
            } else {
                successfulShards++;
            }
        }
        return new OptimizeResponse(shardsResponses.length(), successfulShards, failedShards, shardFailures);
    }

    @Override protected ShardOptimizeRequest newShardRequest() {
        return new ShardOptimizeRequest();
    }

    @Override protected ShardOptimizeRequest newShardRequest(ShardRouting shard, OptimizeRequest request) {
        return new ShardOptimizeRequest(shard.index(), shard.id(), request);
    }

    @Override protected ShardOptimizeResponse newShardResponse() {
        return new ShardOptimizeResponse();
    }

    @Override protected ShardOptimizeResponse shardOperation(ShardOptimizeRequest request) throws ElasticSearchException {
        IndexShard indexShard = indicesService.indexServiceSafe(request.index()).shardSafe(request.shardId());
        indexShard.optimize(new Engine.Optimize()
                .waitForMerge(request.waitForMerge())
                .maxNumSegments(request.maxNumSegments())
                .onlyExpungeDeletes(request.onlyExpungeDeletes())
                .flush(request.flush())
                .refresh(request.refresh())
        );
        return new ShardOptimizeResponse(request.index(), request.shardId());
    }

    /**
     * The refresh request works against *all* shards.
     */
    @Override protected GroupShardsIterator shards(OptimizeRequest request, ClusterState clusterState) {
        return clusterState.routingTable().allShardsGrouped(request.indices());
    }
}
@@ -2266,16 +2266,72 @@
 rvice;%0A%0A
+    private final Object optimizeMutex = new Object();%0A%0A
     @Inj
@@ -4773,16 +4773,59 @@
 ption %7B%0A
+        synchronized (optimizeMutex) %7B%0A    
         
@@ -4935,16 +4935,20 @@
         
+    
 indexSha
@@ -4997,16 +4997,20 @@
         
+    
 .waitFor
@@ -5055,16 +5055,20 @@
         
+   
+ 
 .maxNumS
@@ -5097,24 +5097,28 @@
 Segments())%0A
+    
             
@@ -5187,16 +5187,20 @@
         
+    
 .flush(r
@@ -5231,16 +5231,20 @@
         
+ 
+   
 .refresh
@@ -5271,19 +5271,27 @@
         
-);%0A
+    );%0A    
         
@@ -5356,24 +5356,34 @@
 shardId());%0A
+        %7D%0A
     %7D%0A%0A    /

Optimize API: Don't execute concurrent optimize operations (shard level) on the same node, closes #846.