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package org.eclipse.osee.ote.endpoint;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.channels.AsynchronousCloseException;
import java.nio.channels.ClosedByInterruptException;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.DatagramChannel;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.zip.Deflater;
import org.eclipse.osee.framework.jdk.core.util.Lib;
import org.eclipse.osee.framework.logging.OseeLog;
import org.eclipse.osee.ote.collections.ObjectPool;
final class OteEndpointSendRunnable implements Runnable {
private static final int SEND_BUFFER_SIZE = 1024 * 512;
/**
* This is the header for a ZIP file
*/
public static final byte[] MAGIC_NUMBER = {0x04, 0x03, 0x4b, 0x50};
private static final int MAX_DGRAM_SIZE = 65500;
private final ArrayBlockingQueue<AddressBuffer> toSend;
private final ObjectPool<AddressBuffer> buffers;
private final Deflater compressor = new Deflater();
private boolean debug = false;
OteEndpointSendRunnable(ArrayBlockingQueue<AddressBuffer> toSend, ObjectPool<AddressBuffer> buffers, boolean debug) {
this.toSend = toSend;
this.buffers = buffers;
this.debug = debug;
compressor.setLevel(Deflater.BEST_SPEED);
}
@Override
public void run() {
DatagramChannel threadChannel = null;
try {
threadChannel = openAndInitializeDatagramChannel();
boolean keepRunning = true;
final List<AddressBuffer> dataToSend = new ArrayList<>(32);
System.setSecurityManager(null);
while(keepRunning){
try{
dataToSend.clear();
if (toSend.drainTo(dataToSend) < 1) {
try {
// block until something is available
AddressBuffer addrBuf = toSend.poll(15, TimeUnit.SECONDS);
if (addrBuf == null) {
// no activity for a while so lets clean ourselves up. Our master will restart
// a new thread if another event comes along after we self terminate
keepRunning = false;
} else {
dataToSend.add(addrBuf);
}
} catch (InterruptedException e) {
keepRunning = false;
continue;
}
}
int size = dataToSend.size();
for (int i = 0; i < size; i++) {
AddressBuffer data = dataToSend.get(i);
if (data == OteUdpEndpointSender.POISON_PILL) {
keepRunning = false;
break;
}
int bufSize = data.getBuffer().remaining();
if(bufSize > MAX_DGRAM_SIZE) {
compressor.reset();
compressor.setInput(data.getBuffer().array(), 0, bufSize);
compressor.finish();
ByteArrayOutputStream bos = new ByteArrayOutputStream(bufSize);
byte[] buf = new byte[1024];
while (!compressor.finished()) {
int count = compressor.deflate(buf);
bos.write(buf, 0, count);
}
try {
bos.close();
byte[] dataBytes = new byte[bos.size() + 4];
System.arraycopy(MAGIC_NUMBER, 0, dataBytes, 0, 4);
System.arraycopy(bos.toByteArray(), 0, dataBytes, 4, bos.size());
data.setBytes(dataBytes);
}
catch (IOException e) {
OseeLog.log(getClass(), Level.SEVERE, "Error trying to compress data", e);
continue;
}
}
threadChannel.send(data.getBuffer(), data.getAddress());
}
} catch (ClosedByInterruptException ex){
if(debug){
OseeLog.log(getClass(), Level.SEVERE, "Error trying to send data", ex);
}
threadChannel = openAndInitializeDatagramChannel();
} catch (AsynchronousCloseException ex){
if(debug){
OseeLog.log(getClass(), Level.SEVERE, "Error trying to send data", ex);
}
Lib.close(threadChannel);
threadChannel = openAndInitializeDatagramChannel();
} catch (ClosedChannelException ex){
if(debug){
OseeLog.log(getClass(), Level.SEVERE, "Error trying to send data", ex);
}
Lib.close(threadChannel);
threadChannel = openAndInitializeDatagramChannel();
} catch (IOException ex){
OseeLog.log(getClass(), Level.SEVERE, "Error trying to send data", ex);
} finally {
int size = dataToSend.size();
for (int i = 0; i < size; i++) {
buffers.returnObj(dataToSend.get(i));
}
}
}
} catch (IOException ex){
OseeLog.log(getClass(), Level.SEVERE, "Error opening DatagramChannel. Ending OteEndpointSendRunnable unexpectedly.", ex);
} finally{
Lib.close(threadChannel);
}
}
private DatagramChannel openAndInitializeDatagramChannel() throws IOException {
DatagramChannel channel = DatagramChannel.open();
if (channel.socket().getSendBufferSize() < SEND_BUFFER_SIZE) {
channel.socket().setSendBufferSize(SEND_BUFFER_SIZE);
}
channel.socket().setReuseAddress(true);
channel.configureBlocking(true);
return channel;
}
}
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