107 lines
2.2 KiB
D
107 lines
2.2 KiB
D
module tristanable.watcher;
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import std.socket : Socket;
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import core.sync.mutex : Mutex;
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import bmessage : receiveMessage;
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import tristanable.queue : Queue;
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import tristanable.queueitem : QueueItem;
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import tristanable.manager : Manager;
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import core.thread : Thread;
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import tristanable.encoding;
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import tristanable.exceptions;
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public final class Watcher : Thread
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{
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/* The manager */
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private Manager manager;
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/* The socket to read from */
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private Socket socket;
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private bool running;
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this(Manager manager, Socket endpoint)
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{
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super(&run);
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this.manager = manager;
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socket = endpoint;
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running = true;
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start();
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}
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public void shutdown()
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{
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running=false;
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/* Close the socket, causing an error, breaking the event loop */
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socket.close();
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}
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private void run()
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{
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/* Continuously dequeue tristanable packets from socket */
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while(true)
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{
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/* Receive payload (tag+data) */
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byte[] receivedPayload;
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/* Block for socket response */
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bool recvStatus = receiveMessage(socket, receivedPayload);
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/* If the receive was successful */
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if(recvStatus)
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{
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/* Decode the ttag-encoded message */
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DataMessage message = DataMessage.decode(receivedPayload);
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/* TODO: Remove isTag, improve later, oneshot */
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/* The matching queue (if any) */
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Queue queue = manager.getQueue(message.getTag());
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/* If the tag belongs to a queue */
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if(queue)
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{
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/* Add an item to this queue */
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queue.enqueue(new QueueItem(message.getData()));
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}
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/* If the tag is unknwon */
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else
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{
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/* TODO: Add to dropped queue? */
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/* Do nothing */
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}
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}
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/* If the receive failed */
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else
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{
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/* TODO: depending on `running`, different error */
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/* TODO: Stop everything */
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break;
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}
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/**
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* Like in `dequeue` we don't want the possibility
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* of racing back to the top of the loop and locking
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* the mutex again right before a thread switch,
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* so we make sure that a switch occurs to a different
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* thread
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*/
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Thread.getThis().yield();
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}
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/* Check if we had an error */
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if(running)
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{
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throw new TristanableException(manager, "bformat socket error");
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}
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else
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{
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/* Actual shut down, do nothing */
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}
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}
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} |