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TransportMessage.java
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TransportMessage.java
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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.transport;
import com.google.common.collect.Maps;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Streamable;
import org.elasticsearch.common.transport.TransportAddress;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
*
*/
public abstract class TransportMessage<TM extends TransportMessage<TM>> implements Streamable {
private Map<String, Object> headers;
private TransportAddress remoteAddress;
protected TransportMessage() {
}
protected TransportMessage(TM message) {
// create a new copy of the headers, since we are creating a new request which might have
// its headers changed in the context of that specific request
if (message.getHeaders() != null) {
this.headers = new HashMap<>(message.getHeaders());
}
}
public void remoteAddress(TransportAddress remoteAddress) {
this.remoteAddress = remoteAddress;
}
public TransportAddress remoteAddress() {
return remoteAddress;
}
@SuppressWarnings("unchecked")
public final TM putHeader(String key, Object value) {
if (headers == null) {
headers = Maps.newHashMap();
}
headers.put(key, value);
return (TM) this;
}
@SuppressWarnings("unchecked")
public final <V> V getHeader(String key) {
if (headers == null) {
return null;
}
return (V) headers.get(key);
}
public Map<String, Object> getHeaders() {
return this.headers;
}
@Override
public void readFrom(StreamInput in) throws IOException {
if (in.readBoolean()) {
headers = in.readMap();
}
}
@Override
public void writeTo(StreamOutput out) throws IOException {
if (headers == null) {
out.writeBoolean(false);
} else {
out.writeBoolean(true);
out.writeMap(headers);
}
}
}