// 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.apr;
import org.apache.tomcat.jni.Socket;
import streamer.BaseElement;
import streamer.ByteBuffer;
import streamer.DataSink;
import streamer.Direction;
import streamer.Event;
import streamer.Link;
/**
* Source element, which reads data from InputStream.
*/
public class AprSocketSource extends BaseElement {
protected AprSocketWrapperImpl socketWrapper;
protected Long socket;
public AprSocketSource(String id) {
super(id);
}
public AprSocketSource(String id, AprSocketWrapperImpl socketWrapper) {
super(id);
this.socketWrapper = socketWrapper;
}
@Override
public void handleEvent(Event event, Direction direction) {
switch (event) {
case SOCKET_UPGRADE_TO_SSL:
socketWrapper.upgradeToSsl();
break;
case LINK_SWITCH_TO_PULL_MODE:
// Do nothing - this is the source
break;
default:
super.handleEvent(event, direction);
}
}
@Override
public void setLink(String padName, Link link, Direction direction) {
switch (direction) {
case OUT:
super.setLink(padName, link, direction);
if (socket == null) {
// Pause links until data stream will be ready
link.pause();
}
break;
case IN:
throw new RuntimeException("Cannot assign link to input pad in source element. Element: " + this + ", pad: " + padName + ", link: " + link + ".");
}
}
public void setSocket(long socket) {
this.socket = socket;
// Resume links
resumeLinks();
}
private void resumeLinks() {
for (DataSink sink : outputPads.values())
((Link)sink).resume();
}
/**
* Read data from input stream.
*/
@Override
public void poll(boolean block) {
if (socketWrapper.shutdown) {
socketWrapper.destroyPull();
return;
}
try {
// Create buffer of recommended size and with default offset
ByteBuffer buf = new ByteBuffer(incommingBufLength);
if (verbose)
System.out.println("[" + this + "] INFO: Reading data from stream.");
// FIXME: If pull is destroyed or socket is closed, segfault will happen here
int actualLength = (block) ? // Blocking read
Socket.recv(socket, buf.data, buf.offset, buf.data.length - buf.offset)
: // Non-blocking read
Socket.recvt(socket, buf.data, buf.offset, buf.data.length - buf.offset, 1);
if (socketWrapper.shutdown) {
socketWrapper.destroyPull();
return;
}
if (actualLength < 0) {
if (verbose)
System.out.println("[" + this + "] INFO: End of stream.");
buf.unref();
closeStream();
sendEventToAllPads(Event.STREAM_CLOSE, Direction.OUT);
return;
}
if (actualLength == 0) {
if (verbose)
System.out.println("[" + this + "] INFO: Empty buffer is read from stream.");
buf.unref();
return;
}
buf.length = actualLength;
if (verbose)
System.out.println("[" + this + "] INFO: Data read from stream: " + buf + ".");
pushDataToAllOuts(buf);
} catch (Exception e) {
System.err.println("[" + this + "] ERROR: " + e.getMessage());
closeStream();
}
}
@Override
protected void onClose() {
closeStream();
}
private void closeStream() {
if (socketWrapper.shutdown)
return;
if (verbose)
System.out.println("[" + this + "] INFO: Closing stream.");
try {
sendEventToAllPads(Event.STREAM_CLOSE, Direction.OUT);
} catch (Exception e) {
}
socketWrapper.shutdown();
}
@Override
public String toString() {
return "AprSocketSource(" + id + ")";
}
}