/**
* Closes the connection to the peer if one exists, or immediately closes the connection as soon
* as it opens
*/
public void close() {
lock.lock();
try {
if (writeTarget == null) {
closePending = true;
return;
}
} finally {
lock.unlock();
}
writeTarget.closeConnection();
}
/**
* Sets the {@link MessageWriteTarget} used to write messages to the peer. This should almost
* never be called, it is called automatically by {@link org.bitcoinj.net.NioClient} or {@link
* org.bitcoinj.net.NioClientManager} once the socket finishes initialization.
*/
@Override
public void setWriteTarget(MessageWriteTarget writeTarget) {
checkArgument(writeTarget != null);
lock.lock();
boolean closeNow = false;
try {
checkArgument(this.writeTarget == null);
closeNow = closePending;
this.writeTarget = writeTarget;
} finally {
lock.unlock();
}
if (closeNow) writeTarget.closeConnection();
}
/**
* Sends the given message to the peer. Due to the asynchronousness of network programming, there
* is no guarantee the peer will have received it. Throws NotYetConnectedException if we are not
* yet connected to the remote peer. TODO: Maybe use something other than the unchecked
* NotYetConnectedException here
*/
public void sendMessage(Message message) throws NotYetConnectedException {
lock.lock();
try {
if (writeTarget == null) throw new NotYetConnectedException();
} finally {
lock.unlock();
}
// TODO: Some round-tripping could be avoided here
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
serializer.serialize(message, out);
writeTarget.writeBytes(out.toByteArray());
} catch (IOException e) {
exceptionCaught(e);
}
}