com.hazelcast.mapreduce.JobPartitionState Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.mapreduce;
import com.hazelcast.nio.Address;
import com.hazelcast.spi.annotation.Beta;
/**
* An implementation of this interface contains current information about
* the status of an process piece while operation is executing.
*
* @since 3.2
*/
@Beta
public interface JobPartitionState {
/**
* Returns the owner of this partition
*
* @return owner of the partition
*/
Address getOwner();
/**
* Returns the current processing state of this partition
*
* @return processing state of the partition
*/
State getState();
/**
* Definition of the processing states
*/
enum State {
/**
* Partition waits for being calculated
*/
WAITING,
/**
* Partition is in mapping phase
*/
MAPPING,
/**
* Partition is in reducing phase (mapping may still
* not finished when this state is reached since there
* is a chunked based operation underlying)
*/
REDUCING,
/**
* Partition is fully processed
*/
PROCESSED,
/**
* Partition calculation cancelled due to an internal exception
*/
CANCELLED;
/**
* Returns an processing state by its given ordinal
*
* @param ordinal ordinal to search for
* @return the processing state for the given ordinal
*/
public static State byOrdinal(int ordinal) {
for (State state : values()) {
if (state.ordinal() == ordinal) {
return state;
}
}
return null;
}
}
}