/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.apache.tajo.master.rm;
/**
* It presents the states of {@link Worker}.
*/
public enum WorkerState {
/** New worker */
NEW,
/** Running worker */
RUNNING,
/** Worker is unhealthy */
UNHEALTHY,
/** worker is out of service */
DECOMMISSIONED,
/** worker has not sent a heartbeat for some configured time threshold */
LOST;
@SuppressWarnings("unused")
public boolean isUnusable() {
return (this == UNHEALTHY || this == DECOMMISSIONED || this == LOST);
}
}