kafka PendingUpdateAction 源码
kafka PendingUpdateAction 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/processor/internals/PendingUpdateAction.java
/*
* 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.kafka.streams.processor.internals;
import org.apache.kafka.common.TopicPartition;
import java.util.Objects;
import java.util.Set;
public class PendingUpdateAction {
enum Action {
UPDATE_INPUT_PARTITIONS,
RECYCLE,
SUSPEND,
CLOSE_DIRTY,
CLOSE_CLEAN
}
private final Set<TopicPartition> inputPartitions;
private final Action action;
private PendingUpdateAction(final Action action, final Set<TopicPartition> inputPartitions) {
this.action = action;
this.inputPartitions = inputPartitions;
}
private PendingUpdateAction(final Action action) {
this(action, null);
}
public static PendingUpdateAction createUpdateInputPartition(final Set<TopicPartition> inputPartitions) {
Objects.requireNonNull(inputPartitions, "Set of input partitions to update is null!");
return new PendingUpdateAction(Action.UPDATE_INPUT_PARTITIONS, inputPartitions);
}
public static PendingUpdateAction createRecycleTask(final Set<TopicPartition> inputPartitions) {
Objects.requireNonNull(inputPartitions, "Set of input partitions to update is null!");
return new PendingUpdateAction(Action.RECYCLE, inputPartitions);
}
public static PendingUpdateAction createSuspend() {
return new PendingUpdateAction(Action.SUSPEND);
}
public static PendingUpdateAction createCloseDirty() {
return new PendingUpdateAction(Action.CLOSE_DIRTY);
}
public static PendingUpdateAction createCloseClean() {
return new PendingUpdateAction(Action.CLOSE_CLEAN);
}
public Set<TopicPartition> getInputPartitions() {
if (action != Action.UPDATE_INPUT_PARTITIONS && action != Action.RECYCLE) {
throw new IllegalStateException("Action type " + action + " does not have a set of input partitions!");
}
return inputPartitions;
}
public Action getAction() {
return action;
}
}
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