kafka RecordHeader 源码
kafka RecordHeader 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/header/internals/RecordHeader.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.common.header.internals;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Objects;
import org.apache.kafka.common.header.Header;
import org.apache.kafka.common.utils.Utils;
public class RecordHeader implements Header {
private ByteBuffer keyBuffer;
private String key;
private ByteBuffer valueBuffer;
private byte[] value;
public RecordHeader(String key, byte[] value) {
Objects.requireNonNull(key, "Null header keys are not permitted");
this.key = key;
this.value = value;
}
public RecordHeader(ByteBuffer keyBuffer, ByteBuffer valueBuffer) {
this.keyBuffer = Objects.requireNonNull(keyBuffer, "Null header keys are not permitted");
this.valueBuffer = valueBuffer;
}
public String key() {
if (key == null) {
key = Utils.utf8(keyBuffer, keyBuffer.remaining());
keyBuffer = null;
}
return key;
}
public byte[] value() {
if (value == null && valueBuffer != null) {
value = Utils.toArray(valueBuffer);
valueBuffer = null;
}
return value;
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
RecordHeader header = (RecordHeader) o;
return Objects.equals(key(), header.key()) &&
Arrays.equals(value(), header.value());
}
@Override
public int hashCode() {
int result = key().hashCode();
result = 31 * result + Arrays.hashCode(value());
return result;
}
@Override
public String toString() {
return "RecordHeader(key = " + key() + ", value = " + Arrays.toString(value()) + ")";
}
}
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