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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.rotel.internal.communication;
  14
  15 import java.io.InterruptedIOException;
  16
  17 import org.eclipse.jdt.annotation.NonNullByDefault;
  18 import org.openhab.binding.rotel.internal.RotelException;
  19 import org.openhab.binding.rotel.internal.protocol.RotelAbstractProtocolHandler;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 /**
  24  * A class that reads messages from the Rotel device in a dedicated thread
  25  *
  26  * @author Laurent Garnier - Initial contribution
  27  */
  28 @NonNullByDefault
  29 public class RotelReaderThread extends Thread {
  30
  31     private static final int READ_BUFFER_SIZE = 16;
  32
  33     private final Logger logger = LoggerFactory.getLogger(RotelReaderThread.class);
  34
  35     private final RotelConnector connector;
  36     private final RotelAbstractProtocolHandler protocolHandler;
  37
  38     /**
  39      * Constructor
  40      *
  41      * @param connector the connector to read input data
  42      * @param protocolHandler the protocol handler
  43      * @param threadName the name of the thread
  44      */
  45     public RotelReaderThread(RotelConnector connector, RotelAbstractProtocolHandler protocolHandler,
  46             String threadName) {
  47         super(threadName);
  48         this.connector = connector;
  49         this.protocolHandler = protocolHandler;
  50     }
  51
  52     @Override
  53     public void run() {
  54         logger.debug("Data listener started");
  55
  56         byte[] readDataBuffer = new byte[READ_BUFFER_SIZE];
  57
  58         try {
  59             while (!Thread.interrupted()) {
  60                 int len = connector.readInput(readDataBuffer);
  61                 if (len > 0) {
  62                     protocolHandler.handleIncomingData(readDataBuffer, len);
  63                 }
  64             }
  65         } catch (InterruptedIOException e) {
  66             Thread.currentThread().interrupt();
  67             logger.debug("Interrupted via InterruptedIOException");
  68         } catch (RotelException e) {
  69             logger.debug("Reading failed: {}", e.getMessage(), e);
  70             protocolHandler.handleInIncomingError();
  71         }
  72
  73         logger.debug("Data listener stopped");
  74     }
  75 }