org.springframework.amqp.support.postprocessor.DeflaterPostProcessor Maven / Gradle / Ivy
/*
* Copyright 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.DeflaterOutputStream;
/**
* A post processor that uses a {@link DeflaterOutputStream} to compress the message body.
* Sets {@link org.springframework.amqp.core.MessageProperties#SPRING_AUTO_DECOMPRESS} to
* true by default.
*
* @author David Diehl
* @since 2.2
*/
public class DeflaterPostProcessor extends AbstractDeflaterPostProcessor {
public DeflaterPostProcessor() {
}
public DeflaterPostProcessor(boolean autoDecompress) {
super(autoDecompress);
}
@Override
protected OutputStream getCompressorStream(OutputStream zipped) throws IOException {
return new DeflaterPostProcessor.SettableLevelDeflaterOutputStream(zipped, getLevel());
}
@Override
protected String getEncoding() {
return "deflate";
}
private static final class SettableLevelDeflaterOutputStream extends DeflaterOutputStream {
SettableLevelDeflaterOutputStream(OutputStream out, int level) {
super(out);
this.def.setLevel(level);
}
}
}