org.elasticsearch.action.search.SearchOperationThreading Maven / Gradle / Ivy
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* 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.action.search;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.common.Nullable;
/**
* Controls the operation threading model for search operation that are performed
* locally on the executing node.
*
*
*/
public enum SearchOperationThreading {
/**
* No threads are used, all the local shards operations will be performed on the calling
* thread.
*/
NO_THREADS((byte) 0),
/**
* The local shards operations will be performed in serial manner on a single forked thread.
*/
SINGLE_THREAD((byte) 1),
/**
* Each local shard operation will execute on its own thread.
*/
THREAD_PER_SHARD((byte) 2);
private final byte id;
SearchOperationThreading(byte id) {
this.id = id;
}
public byte id() {
return this.id;
}
public static SearchOperationThreading fromId(byte id) {
if (id == 0) {
return NO_THREADS;
}
if (id == 1) {
return SINGLE_THREAD;
}
if (id == 2) {
return THREAD_PER_SHARD;
}
throw new ElasticsearchIllegalArgumentException("No type matching id [" + id + "]");
}
public static SearchOperationThreading fromString(String value, @Nullable SearchOperationThreading defaultValue) {
if (value == null) {
return defaultValue;
}
if ("no_threads".equals(value) || "noThreads".equals(value)) {
return NO_THREADS;
} else if ("single_thread".equals(value) || "singleThread".equals(value)) {
return SINGLE_THREAD;
} else if ("thread_per_shard".equals(value) || "threadPerShard".equals(value)) {
return THREAD_PER_SHARD;
}
throw new ElasticsearchIllegalArgumentException("No value for search operation threading matching [" + value + "]");
}
}