io.undertow.conduits.DebuggingStreamSourceConduit Maven / Gradle / Ivy
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* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 io.undertow.conduits;
import org.xnio.Buffers;
import org.xnio.IoUtils;
import org.xnio.channels.StreamSinkChannel;
import org.xnio.conduits.AbstractStreamSourceConduit;
import org.xnio.conduits.ConduitReadableByteChannel;
import org.xnio.conduits.StreamSourceConduit;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
/**
* Conduit that saves all the data that is written through it and can dump it to the console
*
* Obviously this should not be used in production.
*
* @author Stuart Douglas
*/
public class DebuggingStreamSourceConduit extends AbstractStreamSourceConduit {
private static final List data = new CopyOnWriteArrayList<>();
/**
* Construct a new instance.
*
* @param next the delegate conduit to set
*/
public DebuggingStreamSourceConduit(StreamSourceConduit next) {
super(next);
}
public long transferTo(final long position, final long count, final FileChannel target) throws IOException {
return target.transferFrom(new ConduitReadableByteChannel(this), position, count);
}
public long transferTo(final long count, final ByteBuffer throughBuffer, final StreamSinkChannel target) throws IOException {
return IoUtils.transfer(new ConduitReadableByteChannel(this), count, throughBuffer, target);
}
@Override
public int read(ByteBuffer dst) throws IOException {
int pos = dst.position();
int res = super.read(dst);
if (res > 0) {
byte[] d = new byte[res];
for (int i = 0; i < res; ++i) {
d[i] = dst.get(i + pos);
}
data.add(d);
}
return res;
}
@Override
public long read(ByteBuffer[] dsts, int offs, int len) throws IOException {
for (int i = offs; i < len; ++i) {
if (dsts[i].hasRemaining()) {
return read(dsts[i]);
}
}
return 0;
}
public static void dump() {
for (int i = 0; i < data.size(); ++i) {
System.out.println("Buffer " + i);
StringBuilder sb = new StringBuilder();
try {
Buffers.dump(ByteBuffer.wrap(data.get(i)), sb, 0, 20);
} catch (IOException e) {
throw new RuntimeException(e);
}
System.out.println(sb);
System.out.println();
}
}
}