org.springframework.amqp.support.postprocessor.GZipPostProcessor Maven / Gradle / Ivy
/*
* Copyright 2014-2016 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.support.postprocessor;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.GZIPOutputStream;
import org.springframework.amqp.core.MessageProperties;
/**
* A post processor that uses a {@link GZIPOutputStream} to compress the
* message body. Sets {@link MessageProperties#SPRING_AUTO_DECOMPRESS} to true
* by default.
*
* @author Gary Russell
* @since 1.4.2
*/
public class GZipPostProcessor extends AbstractDeflaterPostProcessor {
public GZipPostProcessor() {
super();
}
public GZipPostProcessor(boolean autoDecompress) {
super(autoDecompress);
}
@Override
protected OutputStream getCompressorStream(OutputStream zipped) throws IOException {
return new SettableLevelGZIPOutputStream(zipped, this.level);
}
@Override
protected String getEncoding() {
return "gzip";
}
private static final class SettableLevelGZIPOutputStream extends GZIPOutputStream {
SettableLevelGZIPOutputStream(OutputStream out, int level) throws IOException {
super(out);
this.def.setLevel(level);
}
}
}