kafka TimestampConstantPayloadGenerator 源码
kafka TimestampConstantPayloadGenerator 代码
文件路径：/trogdor/src/main/java/org/apache/kafka/trogdor/workload/TimestampConstantPayloadGenerator.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;
import java.nio.ByteOrder;
import java.nio.ByteBuffer;
/**
* A PayloadGenerator which generates a timestamped constant payload.
*
* The timestamp used for this class is in milliseconds since epoch, encoded directly to the first several bytes of the
* payload.
*
* This should be used in conjunction with TimestampRecordProcessor in the Consumer to measure true end-to-end latency
* of a system.
*
* `size` - The size in bytes of each message.
*
* Here is an example spec:
*
* {
* "type": "timestampConstant",
* "size": 512
* }
*
* This will generate a 512-byte message with the first several bytes encoded with the timestamp.
*/
public class TimestampConstantPayloadGenerator implements PayloadGenerator {
private final int size;
private final ByteBuffer buffer;
@JsonCreator
public TimestampConstantPayloadGenerator(@JsonProperty("size") int size) {
this.size = size;
if (size < Long.BYTES) {
throw new RuntimeException("The size of the payload must be greater than or equal to " + Long.BYTES + ".");
}
buffer = ByteBuffer.allocate(Long.BYTES);
buffer.order(ByteOrder.LITTLE_ENDIAN);
}
@JsonProperty
public int size() {
return size;
}
@Override
public synchronized byte[] generate(long position) {
// Generate the byte array before the timestamp generation.
byte[] result = new byte[size];
// Do the timestamp generation as the very last task.
buffer.clear();
buffer.putLong(Time.SYSTEM.milliseconds());
buffer.rewind();
System.arraycopy(buffer.array(), 0, result, 0, Long.BYTES);
return result;
}
}
相关信息
相关文章
kafka ConfigurableProducerSpec 源码
kafka ConfigurableProducerWorker 源码
kafka ConnectionStressWorker 源码
kafka ConstantFlushGenerator 源码
kafka ConstantPayloadGenerator 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦