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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.commons.io;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Random;
import org.apache.commons.io.input.CharSequenceInputStream;
import org.apache.commons.io.input.DemuxInputStream;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.commons.io.output.DemuxOutputStream;
import org.apache.commons.io.test.TestUtils;
import org.junit.jupiter.api.Test;
/**
* Tests {@link DemuxInputStream}.
*/
public class DemuxInputStreamTest {
private static final class ReaderThread extends Thread {
private final DemuxInputStream demuxInputStream;
private final InputStream inputStream;
private final StringBuffer stringBuffer = new StringBuffer();
ReaderThread(final String name, final InputStream input, final DemuxInputStream demux) {
super(name);
inputStream = input;
demuxInputStream = demux;
}
public String getData() {
return stringBuffer.toString();
}
@Override
public void run() {
demuxInputStream.bindStream(inputStream);
try {
int ch = demuxInputStream.read();
while (-1 != ch) {
// System.out.println( "Reading: " + (char)ch );
stringBuffer.append((char) ch);
final int sleepMillis = Math.abs(RANDOM.nextInt() % 10);
TestUtils.sleep(sleepMillis);
ch = demuxInputStream.read();
}
} catch (final Exception e) {
e.printStackTrace();
}
}
}
private static final class WriterThread extends Thread {
private final byte[] byteArray;
private final DemuxOutputStream demuxOutputStream;
private final OutputStream outputStream;
WriterThread(final String name, final String data, final OutputStream output, final DemuxOutputStream demux) {
super(name);
outputStream = output;
demuxOutputStream = demux;
byteArray = data.getBytes();
}
@Override
public void run() {
demuxOutputStream.bindStream(outputStream);
for (final byte element : byteArray) {
try {
// System.out.println( "Writing: " + (char)byteArray[ i ] );
demuxOutputStream.write(element);
final int sleepMillis = Math.abs(RANDOM.nextInt() % 10);
TestUtils.sleep(sleepMillis);
} catch (final Exception e) {
e.printStackTrace();
}
}
}
}
private static final Random RANDOM = new Random();
private static final String DATA1 = "Data for thread1";
private static final String DATA2 = "Data for thread2";
private static final String DATA3 = "Data for thread3";
private static final String DATA4 = "Data for thread4";
private static final String T1 = "Thread1";
private static final String T2 = "Thread2";
private static final String T3 = "Thread3";
private static final String T4 = "Thread4";
private final HashMap<String, ByteArrayOutputStream> outputMap = new HashMap<>();
private final HashMap<String, Thread> threadMap = new HashMap<>();
private void doJoin() throws InterruptedException {
for (final String name : threadMap.keySet()) {
final Thread thread = threadMap.get(name);
thread.join();
}
}
private void doStart() {
threadMap.keySet().forEach(name -> threadMap.get(name).start());
}
private String getInput(final String threadName) {
final ReaderThread thread = (ReaderThread) threadMap.get(threadName);
assertNotNull(thread, "getInput()");
return thread.getData();
}
private String getOutput(final String threadName) {
final ByteArrayOutputStream output = outputMap.get(threadName);
assertNotNull(output, "getOutput()");
return output.toString(StandardCharsets.UTF_8);
}
private void startReader(final String name, final String data, final DemuxInputStream demux) {
final InputStream input = CharSequenceInputStream.builder().setCharSequence(data).get();
final ReaderThread thread = new ReaderThread(name, input, demux);
threadMap.put(name, thread);
}
private void startWriter(final String name, final String data, final DemuxOutputStream demux) {
final ByteArrayOutputStream output = new ByteArrayOutputStream();
outputMap.put(name, output);
final WriterThread thread = new WriterThread(name, data, output, demux);
threadMap.put(name, thread);
}
@Test
public void testInputStream() throws Exception {
try (final DemuxInputStream input = new DemuxInputStream()) {
startReader(T1, DATA1, input);
startReader(T2, DATA2, input);
startReader(T3, DATA3, input);
startReader(T4, DATA4, input);
doStart();
doJoin();
assertEquals(DATA1, getInput(T1), "Data1");
assertEquals(DATA2, getInput(T2), "Data2");
assertEquals(DATA3, getInput(T3), "Data3");
assertEquals(DATA4, getInput(T4), "Data4");
}
}
@Test
public void testOutputStream() throws Exception {
try (final DemuxOutputStream output = new DemuxOutputStream()) {
startWriter(T1, DATA1, output);
startWriter(T2, DATA2, output);
startWriter(T3, DATA3, output);
startWriter(T4, DATA4, output);
doStart();
doJoin();
assertEquals(DATA1, getOutput(T1), "Data1");
assertEquals(DATA2, getOutput(T2), "Data2");
assertEquals(DATA3, getOutput(T3), "Data3");
assertEquals(DATA4, getOutput(T4), "Data4");
}
}
@Test
public void testReadEOF() throws Exception {
try (final DemuxInputStream input = new DemuxInputStream()) {
assertEquals(IOUtils.EOF, input.read());
}
}
}
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