kafka TimeIntervalTransactionsGenerator 源码
kafka TimeIntervalTransactionsGenerator 代码
文件路径：/trogdor/src/main/java/org/apache/kafka/trogdor/workload/TimeIntervalTransactionsGenerator.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;
import org.apache.kafka.common.utils.Time;
/**
* A transactions generator where we commit a transaction every N milliseconds
*/
public class TimeIntervalTransactionsGenerator implements TransactionGenerator {
private static final long NULL_START_MS = -1;
private final Time time;
private final int intervalMs;
private long lastTransactionStartMs = NULL_START_MS;
@JsonCreator
public TimeIntervalTransactionsGenerator(@JsonProperty("transactionIntervalMs") int intervalMs) {
this(intervalMs, Time.SYSTEM);
}
TimeIntervalTransactionsGenerator(@JsonProperty("transactionIntervalMs") int intervalMs,
Time time) {
if (intervalMs < 1) {
throw new IllegalArgumentException("Cannot have a negative interval");
}
this.time = time;
this.intervalMs = intervalMs;
}
@JsonProperty
public int transactionIntervalMs() {
return intervalMs;
}
@Override
public synchronized TransactionAction nextAction() {
if (lastTransactionStartMs == NULL_START_MS) {
lastTransactionStartMs = time.milliseconds();
return TransactionAction.BEGIN_TRANSACTION;
}
if (time.milliseconds() - lastTransactionStartMs >= intervalMs) {
lastTransactionStartMs = NULL_START_MS;
return TransactionAction.COMMIT_TRANSACTION;
}
return TransactionAction.NO_OP;
}
}
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