kafka ConstantPayloadGenerator 源码
kafka ConstantPayloadGenerator 代码
文件路径：/trogdor/src/main/java/org/apache/kafka/trogdor/workload/ConstantPayloadGenerator.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 PayloadGenerator which always generates a constant payload.
*/
public class ConstantPayloadGenerator implements PayloadGenerator {
private final int size;
private final byte[] value;
@JsonCreator
public ConstantPayloadGenerator(@JsonProperty("size") int size,
@JsonProperty("value") byte[] value) {
this.size = size;
this.value = (value == null || value.length == 0) ? new byte[size] : value;
}
@JsonProperty
public int size() {
return size;
}
@JsonProperty
public byte[] value() {
return value;
}
@Override
public byte[] generate(long position) {
byte[] next = new byte[size];
for (int i = 0; i < next.length; i += value.length) {
System.arraycopy(value, 0, next, i, Math.min(next.length - i, value.length));
}
return next;
}
}
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