org.springframework.amqp.support.postprocessor.ZipPostProcessor Maven / Gradle / Ivy
/*
* Copyright 2014-2019 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
*
* https://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.ZipEntry;
import java.util.zip.ZipOutputStream;
/**
* A post processor that uses a {@link ZipOutputStream} to compress the message body. Sets
* {@link org.springframework.amqp.core.MessageProperties#SPRING_AUTO_DECOMPRESS} to true
* by default.
*
* @author Gary Russell
* @since 1.4.2
*/
public class ZipPostProcessor extends AbstractDeflaterPostProcessor {
public ZipPostProcessor() {
}
public ZipPostProcessor(boolean autoDecompress) {
super(autoDecompress);
}
@Override
protected OutputStream getCompressorStream(OutputStream zipped) throws IOException {
ZipOutputStream zipper = new SettableLevelZipOutputStream(zipped, getLevel());
zipper.putNextEntry(new ZipEntry("amqp"));
return zipper;
}
@Override
protected String getEncoding() {
return "zip";
}
private static final class SettableLevelZipOutputStream extends ZipOutputStream {
SettableLevelZipOutputStream(OutputStream zipped, int level) {
super(zipped);
this.setLevel(level);
}
}
}