/**
* 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.hadoop.hbase.master.procedure;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
/**
* Procedures that handle servers -- e.g. server crash -- must implement this Interface.
* It is used by the procedure runner to figure locking and what queuing.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public interface ServerProcedureInterface {
public enum ServerOperationType {
CRASH_HANDLER
};
/**
* @return Name of this server instance.
*/
ServerName getServerName();
/**
* @return True if this server has an hbase:meta table region.
*/
boolean hasMetaTableRegion();
/**
* Given an operation type we can take decisions about what to do with pending operations.
* e.g. if we get a crash handler and we have some assignment operation pending
* we can abort those operations.
* @return the operation type that the procedure is executing.
*/
ServerOperationType getServerOperationType();
}