org.springframework.amqp.core.Message Maven / Gradle / Ivy
/*
* Copyright 2002-2017 the original author or authors.
*
* Licensed 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.springframework.amqp.core;
import java.io.Serializable;
import java.nio.charset.Charset;
import java.util.Arrays;
import org.springframework.amqp.support.converter.SerializerMessageConverter;
/**
* The 0-8 and 0-9-1 AMQP specifications do not define an Message class or interface. Instead, when performing an
* operation such as basicPublish the content is passed as a byte-array argument and additional properties are passed in
* as separate arguments. Spring AMQP defines a Message class as part of a more general AMQP domain model
* representation. The purpose of the Message class is to simply encapsulate the body and properties within a single
* instance so that the rest of the AMQP API can in turn be simpler.
*
* @author Mark Pollack
* @author Mark Fisher
* @author Oleg Zhurakousky
* @author Dave Syer
* @author Gary Russell
* @author Alex Panchenko
*/
public class Message implements Serializable {
private static final long serialVersionUID = -7177590352110605597L;
private static final String ENCODING = Charset.defaultCharset().name();
private static final SerializerMessageConverter SERIALIZER_MESSAGE_CONVERTER = new SerializerMessageConverter();
static {
SERIALIZER_MESSAGE_CONVERTER.setWhiteListPatterns(Arrays.asList("java.util.*", "java.lang.*"));
}
private final MessageProperties messageProperties;
private final byte[] body;
public Message(byte[] body, MessageProperties messageProperties) { //NOSONAR
this.body = body; //NOSONAR
this.messageProperties = messageProperties;
}
/**
* Add patterns to the white list of permissable package/class name patterns for
* deserialization in {@link #toString()}.
* The patterns will be applied in order until a match is found.
* A class can be fully qualified or a wildcard '*' is allowed at the
* beginning or end of the class name.
* Examples: {@code com.foo.*}, {@code *.MyClass}.
* By default, only {@code java.util} and {@code java.lang} classes will be
* deserialized.
* @param patterns the patterns.
* @since 1.5.7
*/
public static void addWhiteListPatterns(String... patterns) {
SERIALIZER_MESSAGE_CONVERTER.addWhiteListPatterns(patterns);
}
public byte[] getBody() {
return this.body; //NOSONAR
}
public MessageProperties getMessageProperties() {
return this.messageProperties;
}
@Override
public String toString() {
StringBuilder buffer = new StringBuilder();
buffer.append("(");
buffer.append("Body:'").append(this.getBodyContentAsString()).append("'");
if (this.messageProperties != null) {
buffer.append(" ").append(this.messageProperties.toString());
}
buffer.append(")");
return buffer.toString();
}
private String getBodyContentAsString() {
if (this.body == null) {
return null;
}
try {
String contentType = (this.messageProperties != null) ? this.messageProperties.getContentType() : null;
if (MessageProperties.CONTENT_TYPE_SERIALIZED_OBJECT.equals(contentType)) {
return SERIALIZER_MESSAGE_CONVERTER.fromMessage(this).toString();
}
if (MessageProperties.CONTENT_TYPE_TEXT_PLAIN.equals(contentType)
|| MessageProperties.CONTENT_TYPE_JSON.equals(contentType)
|| MessageProperties.CONTENT_TYPE_JSON_ALT.equals(contentType)
|| MessageProperties.CONTENT_TYPE_XML.equals(contentType)) {
return new String(this.body, ENCODING);
}
}
catch (Exception e) {
// ignore
}
// Comes out as '[[email protected]' (so harmless)
return this.body.toString() + "(byte[" + this.body.length + "])"; //NOSONAR
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + Arrays.hashCode(this.body);
result = prime * result + ((this.messageProperties == null) ? 0 : this.messageProperties.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
Message other = (Message) obj;
if (!Arrays.equals(this.body, other.body)) {
return false;
}
if (this.messageProperties == null) {
if (other.messageProperties != null) {
return false;
}
}
else if (!this.messageProperties.equals(other.messageProperties)) {
return false;
}
return true;
}
}