// 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 streamer;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import streamer.debug.FakeSource;
public class OutputStreamSink extends BaseElement {
protected OutputStream os;
protected SocketWrapperImpl socketWrapper;
public OutputStreamSink(String id) {
super(id);
}
public OutputStreamSink(String id, OutputStream os) {
super(id);
this.os = os;
}
public OutputStreamSink(String id, SocketWrapperImpl socketWrapper) {
super(id);
this.socketWrapper = socketWrapper;
}
public void setOutputStream(OutputStream os) {
this.os = os;
// Resume links
resumeLinks();
}
/**
* Send incoming data to stream.
*/
@Override
public void handleData(ByteBuffer buf, Link link) {
if (buf == null)
return;
try {
if (verbose)
System.out.println("[" + this + "] INFO: Writing data to stream: " + buf + ".");
os.write(buf.data, buf.offset, buf.length);
os.flush();
} catch (IOException e) {
System.err.println("[" + this + "] ERROR: " + e.getMessage());
closeStream();
}
}
@Override
public void handleEvent(Event event, Direction direction) {
switch (event) {
case SOCKET_UPGRADE_TO_SSL:
socketWrapper.upgradeToSsl();
break;
default:
super.handleEvent(event, direction);
}
}
@Override
public void setLink(String padName, Link link, Direction direction) {
switch (direction) {
case IN:
super.setLink(padName, link, direction);
if (os == null)
// Pause links until data stream will be ready
link.pause();
break;
case OUT:
throw new RuntimeException("Cannot assign link to output pad in sink element. Element: " + this + ", pad: " + padName + ", link: " + link + ".");
}
}
private void resumeLinks() {
for (DataSource source : inputPads.values())
((Link)source).resume();
}
@Override
protected void onClose() {
closeStream();
}
private void closeStream() {
if (verbose)
System.out.println("[" + this + "] INFO: Closing stream.");
try {
os.close();
} catch (IOException e) {
}
try {
sendEventToAllPads(Event.STREAM_CLOSE, Direction.IN);
} catch (Exception e) {
}
}
@Override
public String toString() {
return "OutputStreamSink(" + id + ")";
}
/**
* Example.
*/
public static void main(String args[]) {
Element source = new FakeSource("source") {
{
verbose = true;
numBuffers = 3;
incommingBufLength = 5;
delay = 100;
}
};
OutputStreamSink sink = new OutputStreamSink("sink") {
{
verbose = true;
}
};
Link link = new SyncLink();
source.setLink(STDOUT, link, Direction.OUT);
sink.setLink(STDIN, link, Direction.IN);
sink.setOutputStream(new ByteArrayOutputStream());
link.sendEvent(Event.STREAM_START, Direction.IN);
link.run();
}
}