com.uuweaver.ucore.amqp.core.Message.java Source code

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Here is the source code for com.uuweaver.ucore.amqp.core.Message.java

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/*
 * Copyright 2002-2010 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 com.uuweaver.ucore.amqp.core;

import org.apache.commons.lang.SerializationUtils;

import java.nio.charset.Charset;

/**
 * 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
 */
public class Message {

    private static final String ENCODING = Charset.defaultCharset().name();

    private final MessageProperties messageProperties;

    private final byte[] body;

    public Message(byte[] body, MessageProperties messageProperties) {
        this.body = body;
        this.messageProperties = messageProperties;
    }

    public byte[] getBody() {
        return this.body;
    }

    public MessageProperties getMessageProperties() {
        return this.messageProperties;
    }

    public String toString() {
        StringBuffer buffer = new StringBuffer();
        buffer.append("(");
        buffer.append("Body:'" + this.getBodyContentAsString() + "'");
        if (messageProperties != null) {
            buffer.append("; ID:" + messageProperties.getMessageId());
            buffer.append("; Content:" + messageProperties.getContentType());
            buffer.append("; Headers:" + messageProperties.getHeaders());
            buffer.append("; Exchange:" + messageProperties.getReceivedExchange());
            buffer.append("; RoutingKey:" + messageProperties.getReceivedRoutingKey());
            buffer.append("; Reply:" + messageProperties.getReplyTo());
            buffer.append("; DeliveryMode:" + messageProperties.getDeliveryMode());
            buffer.append("; DeliveryTag:" + messageProperties.getDeliveryTag());
        }
        buffer.append(")");
        return buffer.toString();
    }

    private String getBodyContentAsString() {
        if (body == null) {
            return null;
        }
        try {
            String contentType = (messageProperties != null) ? messageProperties.getContentType() : null;
            if (MessageProperties.CONTENT_TYPE_SERIALIZED_OBJECT.equals(contentType)) {
                return SerializationUtils.deserialize(body).toString();
            }
            if (MessageProperties.CONTENT_TYPE_TEXT_PLAIN.equals(contentType)) {
                return new String(body, ENCODING);
            }
            if (MessageProperties.CONTENT_TYPE_JSON.equals(contentType)) {
                return new String(body, ENCODING);
            }
        } catch (Exception e) {
            // ignore
        }
        return body.toString() + "(byte[" + body.length + "])"; // Comes out as '[B@....b' (so harmless)
    }

}