/*
* 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.flink.runtime.operators.shipping;
/**
* Enumeration defining the different shipping types of the output, such as local forward, re-partitioning by hash,
* or re-partitioning by range.
*/
public enum ShipStrategyType {
/**
* Constant used as an indicator for an unassigned ship strategy.
*/
NONE(false, false),
/**
* Forwarding the data locally in memory.
*/
FORWARD(false, false),
/**
* Repartitioning the data randomly, typically when the parallelism between two nodes changes.
*/
PARTITION_RANDOM(true, false),
/**
* Repartitioning the data deterministically through a hash function.
*/
PARTITION_HASH(true, true),
/**
* Partitioning the data in ranges according to a total order.
*/
PARTITION_RANGE(true, true),
/**
* Partitioning the data evenly, forced at a specific location (cannot be pushed down by optimizer).
*/
PARTITION_FORCED_REBALANCE(true, false),
/**
* Replicating the data set to all instances.
*/
BROADCAST(true, false),
/**
* Partitioning using a custom partitioner.
*/
PARTITION_CUSTOM(true, true);
// --------------------------------------------------------------------------------------------
private final boolean isNetwork;
private final boolean requiresComparator;
private ShipStrategyType(boolean network, boolean requiresComparator) {
this.isNetwork = network;
this.requiresComparator = requiresComparator;
}
public boolean isNetworkStrategy() {
return this.isNetwork;
}
public boolean requiresComparator() {
return this.requiresComparator;
}
}