@GuardedBy("lock")
private void receiveCloseMessage() throws InsufficientMoneyException {
log.info("Got CLOSE message, closing channel");
if (state != null) {
settlePayment(CloseReason.CLIENT_REQUESTED_CLOSE);
} else {
conn.destroyConnection(CloseReason.CLIENT_REQUESTED_CLOSE);
}
}
private void error(String message, Protos.Error.ErrorCode errorCode, CloseReason closeReason) {
log.error(message);
Protos.Error.Builder errorBuilder;
errorBuilder = Protos.Error.newBuilder().setCode(errorCode).setExplanation(message);
conn.sendToClient(
Protos.TwoWayChannelMessage.newBuilder()
.setError(errorBuilder)
.setType(Protos.TwoWayChannelMessage.MessageType.ERROR)
.build());
conn.destroyConnection(closeReason);
}
/**
* Closes the connection by generating a settle message for the client and calls {@link
* ServerConnection#destroyConnection(CloseReason)}. Note that this does not broadcast the payment
* transaction and the client may still resume the same channel if they reconnect
*
* <p>
*
* <p>Note that {@link PaymentChannelServer#connectionClosed()} must still be called after the
* connection fully closes.
*/
public void close() {
lock.lock();
try {
if (connectionOpen && !channelSettling) {
final Protos.TwoWayChannelMessage.Builder msg = Protos.TwoWayChannelMessage.newBuilder();
msg.setType(Protos.TwoWayChannelMessage.MessageType.CLOSE);
conn.sendToClient(msg.build());
conn.destroyConnection(CloseReason.SERVER_REQUESTED_CLOSE);
}
} finally {
lock.unlock();
}
}
/**
* Called when a message is received from the client. Processes the given message and generates
* events based on its content.
*/
public void receiveMessage(Protos.TwoWayChannelMessage msg) {
lock.lock();
try {
checkState(connectionOpen);
if (channelSettling) return;
// If we generate an error, we set errorBuilder and closeReason and break, otherwise we return
Protos.Error.Builder errorBuilder;
CloseReason closeReason;
try {
switch (msg.getType()) {
case CLIENT_VERSION:
receiveVersionMessage(msg);
return;
case PROVIDE_REFUND:
receiveRefundMessage(msg);
return;
case PROVIDE_CONTRACT:
receiveContractMessage(msg);
return;
case UPDATE_PAYMENT:
checkState(step == InitStep.CHANNEL_OPEN && msg.hasUpdatePayment());
receiveUpdatePaymentMessage(msg.getUpdatePayment(), true);
return;
case CLOSE:
receiveCloseMessage();
return;
case ERROR:
checkState(msg.hasError());
log.error(
"Client sent ERROR {} with explanation {}",
msg.getError().getCode().name(),
msg.getError().hasExplanation() ? msg.getError().getExplanation() : "");
conn.destroyConnection(CloseReason.REMOTE_SENT_ERROR);
return;
default:
final String errorText =
"Got unknown message type or type that doesn't apply to servers.";
error(
errorText,
Protos.Error.ErrorCode.SYNTAX_ERROR,
CloseReason.REMOTE_SENT_INVALID_MESSAGE);
}
} catch (VerificationException e) {
log.error("Caught verification exception handling message from client", e);
error(
e.getMessage(),
Protos.Error.ErrorCode.BAD_TRANSACTION,
CloseReason.REMOTE_SENT_INVALID_MESSAGE);
} catch (ValueOutOfRangeException e) {
log.error("Caught value out of range exception handling message from client", e);
error(
e.getMessage(),
Protos.Error.ErrorCode.BAD_TRANSACTION,
CloseReason.REMOTE_SENT_INVALID_MESSAGE);
} catch (InsufficientMoneyException e) {
log.error("Caught insufficient money exception handling message from client", e);
error(
e.getMessage(),
Protos.Error.ErrorCode.BAD_TRANSACTION,
CloseReason.REMOTE_SENT_INVALID_MESSAGE);
} catch (IllegalStateException e) {
log.error("Caught illegal state exception handling message from client", e);
error(
e.getMessage(),
Protos.Error.ErrorCode.SYNTAX_ERROR,
CloseReason.REMOTE_SENT_INVALID_MESSAGE);
}
} finally {
lock.unlock();
}
}
