kafka UniformTransactionsGenerator 源码
kafka UniformTransactionsGenerator 代码
文件路径：/trogdor/src/main/java/org/apache/kafka/trogdor/workload/UniformTransactionsGenerator.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.trogdor.workload;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
/**
* A uniform transactions generator where every N records are grouped in a separate transaction
*/
public class UniformTransactionsGenerator implements TransactionGenerator {
private final int messagesPerTransaction;
private int messagesInTransaction = -1;
@JsonCreator
public UniformTransactionsGenerator(@JsonProperty("messagesPerTransaction") int messagesPerTransaction) {
if (messagesPerTransaction < 1)
throw new IllegalArgumentException("Cannot have less than one message per transaction.");
this.messagesPerTransaction = messagesPerTransaction;
}
@JsonProperty
public int messagesPerTransaction() {
return messagesPerTransaction;
}
@Override
public synchronized TransactionAction nextAction() {
if (messagesInTransaction == -1) {
messagesInTransaction = 0;
return TransactionAction.BEGIN_TRANSACTION;
}
if (messagesInTransaction == messagesPerTransaction) {
messagesInTransaction = -1;
return TransactionAction.COMMIT_TRANSACTION;
}
messagesInTransaction += 1;
return TransactionAction.NO_OP;
}
}
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