io.undertow.conduits.DebuggingStreamSourceConduit Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

The newest version!

/*
 * JBoss, Home of Professional Open Source.
 * 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();
        }

    }
}