private <T> Response<T> sendRequest(
RequestType type,
SlaveContext slaveContext,
Serializer serializer,
Deserializer<T> deserializer) {
// TODO Refactor, break into smaller methods
Triplet<Channel, ChannelBuffer, ByteBuffer> channelContext = null;
try {
// Send 'em over the wire
channelContext = getChannel();
Channel channel = channelContext.first();
ChannelBuffer buffer = channelContext.second();
buffer.clear();
buffer = new ChunkingChannelBuffer(buffer, channel, MAX_FRAME_LENGTH);
buffer.writeByte(type.ordinal());
if (type.includesSlaveContext()) {
writeSlaveContext(buffer, slaveContext);
}
serializer.write(buffer, channelContext.third());
if (buffer.writerIndex() > 0) {
channel.write(buffer);
}
// Read the response
@SuppressWarnings("unchecked")
BlockingReadHandler<ChannelBuffer> reader =
(BlockingReadHandler<ChannelBuffer>) channel.getPipeline().get("blockingHandler");
final Triplet<Channel, ChannelBuffer, ByteBuffer> finalChannelContext = channelContext;
DechunkingChannelBuffer dechunkingBuffer =
new DechunkingChannelBuffer(reader) {
@Override
protected ChannelBuffer readNext() {
ChannelBuffer result = super.readNext();
if (result == null) {
channelPool.dispose(finalChannelContext);
throw new HaCommunicationException("Channel has been closed");
}
return result;
}
};
T response = deserializer.read(dechunkingBuffer);
TransactionStream txStreams =
type.includesSlaveContext()
? readTransactionStreams(dechunkingBuffer)
: TransactionStream.EMPTY;
return new Response<T>(response, txStreams);
} catch (ClosedChannelException e) {
channelPool.dispose(channelContext);
throw new HaCommunicationException(e);
} catch (IOException e) {
throw new HaCommunicationException(e);
} catch (InterruptedException e) {
throw new HaCommunicationException(e);
} catch (Exception e) {
throw new HaCommunicationException(e);
}
}
