/**
* 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.requests;
import static org.apache.kafka.common.protocol.Protocol.RESPONSE_HEADER;
import java.nio.ByteBuffer;
import org.apache.kafka.common.protocol.Protocol;
import org.apache.kafka.common.protocol.types.Field;
import org.apache.kafka.common.protocol.types.Struct;
/**
* A response header in the kafka protocol.
*/
public class ResponseHeader extends AbstractRequestResponse {
private static Field CORRELATION_KEY_FIELD = RESPONSE_HEADER.get("correlation_id");
private final int correlationId;
public ResponseHeader(Struct header) {
super(header);
correlationId = struct.getInt(CORRELATION_KEY_FIELD);
}
public ResponseHeader(int correlationId) {
super(new Struct(Protocol.RESPONSE_HEADER));
struct.set(CORRELATION_KEY_FIELD, correlationId);
this.correlationId = correlationId;
}
public int correlationId() {
return correlationId;
}
public static ResponseHeader parse(ByteBuffer buffer) {
return new ResponseHeader(((Struct) Protocol.RESPONSE_HEADER.read(buffer)));
}
}