/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.index.store;

import org.apache.lucene.store.Directory;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.settings.IndexSettings;
import org.elasticsearch.index.shard.AbstractIndexShardComponent;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.index.store.distributor.Distributor;

import java.io.IOException;

/**
 */
public abstract class DirectoryService extends AbstractIndexShardComponent {

    protected DirectoryService(ShardId shardId, @IndexSettings Settings indexSettings) {
        super(shardId, indexSettings);
    }

    public abstract Directory[] build() throws IOException;

    public abstract long throttleTimeInNanos();

    /**
     * Creates a new Directory from the given distributor.
     * The default implementation returns a new {@link org.elasticsearch.index.store.DistributorDirectory}
     */
    public Directory newFromDistributor(Distributor distributor) throws IOException {
        return new DistributorDirectory(distributor);
    }
}
@@ -865,16 +865,64 @@
 ectory;%0A
+import org.apache.lucene.store.FilterDirectory;%0A
 import o
@@ -1728,16 +1728,79 @@
 ectory%7D%0A
+     * if there is more than one data path in the distributor.%0A
      */%0A
@@ -1839,16 +1839,22 @@
 ributor(
+final 
 Distribu
@@ -1891,16 +1891,350 @@
 ption %7B%0A
+        if (distributor.all().length == 1) %7B%0A            // use filter dir for consistent toString methods%0A            return new FilterDirectory(distributor.primary()) %7B%0A                @Override%0A                public String toString() %7B%0A                    return distributor.toString();%0A                %7D%0A            %7D;%0A        %7D%0A
         

Use DistributorDirectory only if there are more than one data direcotry