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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.hyperion.internal.connection;
  14
  15 import java.io.BufferedReader;
  16 import java.io.DataOutputStream;
  17 import java.io.IOException;
  18 import java.io.InputStreamReader;
  19 import java.io.Reader;
  20 import java.net.InetAddress;
  21 import java.net.Socket;
  22 import java.net.UnknownHostException;
  23
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 /**
  28  * The {@link JsonTcpConnection} class is responsible for handling
  29  * the communication with the Hyperion json server.
  30  *
  31  * @author Daniel Walters - Initial contribution
  32  */
  33 public class JsonTcpConnection {
  34
  35     private final Logger logger = LoggerFactory.getLogger(JsonTcpConnection.class);
  36     private InetAddress address;
  37     private int port;
  38     private Socket hyperionServerSocket;
  39
  40     public JsonTcpConnection(InetAddress address, int port) {
  41         this.setAddress(address);
  42         this.port = port;
  43     }
  44
  45     public JsonTcpConnection(String sAddress, int port) throws UnknownHostException {
  46         this(InetAddress.getByName(sAddress), port);
  47     }
  48
  49     public int getPort() {
  50         return port;
  51     }
  52
  53     public InetAddress getAddress() {
  54         return address;
  55     }
  56
  57     public void setAddress(InetAddress address) {
  58         this.address = address;
  59     }
  60
  61     public String send(String json) throws IOException {
  62         String response = null;
  63         try (Socket hyperionServer = new Socket(address, port);
  64                 DataOutputStream outToServer = new DataOutputStream(hyperionServer.getOutputStream());
  65                 Reader isr = new InputStreamReader(hyperionServer.getInputStream());
  66                 BufferedReader inFromServer = new BufferedReader(isr)) {
  67             logger.debug("Sending: {}", json);
  68             outToServer.writeBytes(json + System.lineSeparator());
  69             outToServer.flush();
  70             response = inFromServer.readLine();
  71         }
  72         logger.debug("Received: {}", response);
  73         return response;
  74     }
  75
  76     public void connect() throws IOException {
  77         if (hyperionServerSocket == null || !hyperionServerSocket.isConnected()) {
  78             hyperionServerSocket = new Socket(address, port);
  79         }
  80     }
  81
  82     public void close() throws IOException {
  83         if (hyperionServerSocket != null && hyperionServerSocket.isConnected()) {
  84             hyperionServerSocket.close();
  85         }
  86     }
  87
  88     public boolean isConnected() {
  89         return hyperionServerSocket != null && hyperionServerSocket.isConnected();
  90     }
  91 }