1 | package omq.server; |
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2 | |
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3 | import java.io.IOException; |
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4 | import java.lang.reflect.InvocationTargetException; |
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5 | import java.util.Properties; |
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6 | |
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7 | import omq.common.broker.Broker; |
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8 | import omq.common.message.Request; |
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9 | import omq.common.message.Response; |
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10 | import omq.common.util.Serializer; |
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11 | import omq.exception.OmqException; |
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12 | |
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13 | import org.apache.log4j.Logger; |
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14 | |
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15 | import com.rabbitmq.client.AMQP.BasicProperties; |
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16 | import com.rabbitmq.client.Channel; |
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17 | import com.rabbitmq.client.QueueingConsumer; |
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18 | import com.rabbitmq.client.QueueingConsumer.Delivery; |
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19 | |
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20 | public abstract class AInvocationThread extends Thread { |
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21 | |
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22 | private static final Logger logger = Logger.getLogger(AInvocationThread.class.getName()); |
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23 | |
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24 | // RemoteObject |
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25 | protected RemoteObject obj; |
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26 | protected String reference; |
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27 | protected String UID; |
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28 | protected Properties env; |
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29 | |
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30 | protected RemoteThreadPool pool; |
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31 | |
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32 | // Broker |
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33 | protected Broker broker; |
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34 | protected Serializer serializer; |
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35 | |
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36 | // Consumer |
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37 | protected Channel channel; |
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38 | protected QueueingConsumer consumer; |
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39 | protected boolean killed = false; |
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40 | |
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41 | public AInvocationThread(RemoteObject obj) throws Exception { |
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42 | this.obj = obj; |
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43 | this.UID = obj.getUID(); |
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44 | this.reference = obj.getRef(); |
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45 | this.env = obj.getEnv(); |
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46 | this.broker = obj.getBroker(); |
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47 | this.pool = obj.getPool(); |
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48 | this.serializer = broker.getSerializer(); |
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49 | } |
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50 | |
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51 | @Override |
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52 | public synchronized void start() { |
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53 | try { |
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54 | startQueues(); |
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55 | super.start(); |
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56 | } catch (Exception e) { |
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57 | logger.error("Cannot start a remoteObject", e); |
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58 | } |
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59 | |
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60 | } |
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61 | |
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62 | /** |
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63 | * This method starts the queues using the information got in the |
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64 | * environment. |
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65 | * |
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66 | * @throws Exception |
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67 | */ |
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68 | protected abstract void startQueues() throws Exception; |
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69 | |
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70 | protected void executeTask(Delivery delivery) throws Exception{ |
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71 | String serializerType = delivery.getProperties().getType(); |
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72 | |
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73 | // Deserialize the request |
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74 | Request request = serializer.deserializeRequest(serializerType, delivery.getBody(), obj); |
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75 | String methodName = request.getMethod(); |
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76 | String requestID = request.getId(); |
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77 | |
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78 | logger.debug("Object: " + obj.getRef() + ", method: " + methodName + " corrID: " + requestID + ", serializerType: " |
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79 | + serializerType); |
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80 | |
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81 | // Invoke the method |
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82 | Object result = null; |
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83 | OmqException error = null; |
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84 | try { |
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85 | result = obj.invokeMethod(request.getMethod(), request.getParams()); |
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86 | } catch (InvocationTargetException e) { |
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87 | Throwable throwable = e.getTargetException(); |
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88 | logger.error("Object: " + obj.getRef() + " at method: " + methodName + ", corrID" + requestID, throwable); |
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89 | error = new OmqException(throwable.getClass().getCanonicalName(), throwable.getMessage()); |
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90 | } catch (NoSuchMethodException e) { |
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91 | logger.error("Object: " + obj.getRef() + " cannot find method: " + methodName); |
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92 | error = new OmqException(e.getClass().getCanonicalName(), e.getMessage()); |
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93 | } |
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94 | |
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95 | // Reply if it's necessary |
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96 | if (!request.isAsync()) { |
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97 | Response resp = new Response(request.getId(), obj.getRef(), result, error); |
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98 | |
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99 | BasicProperties props = delivery.getProperties(); |
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100 | |
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101 | BasicProperties replyProps = new BasicProperties.Builder().appId(obj.getRef()).correlationId(props.getCorrelationId()) |
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102 | .build(); |
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103 | |
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104 | byte[] bytesResponse = serializer.serialize(serializerType, resp); |
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105 | channel.basicPublish("", props.getReplyTo(), replyProps, bytesResponse); |
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106 | logger.debug("Publish sync response -> Object: " + obj.getRef() + ", method: " + methodName + " corrID: " + requestID |
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107 | + " replyTo: " + props.getReplyTo()); |
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108 | } |
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109 | |
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110 | channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false); |
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111 | } |
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112 | |
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113 | public void kill() throws IOException { |
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114 | logger.info("Killing objectmq: " + reference + " thread id"); |
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115 | killed = true; |
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116 | interrupt(); |
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117 | channel.close(); |
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118 | } |
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119 | |
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120 | public RemoteObject getObj() { |
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121 | return obj; |
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122 | } |
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123 | |
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124 | public void setObj(RemoteObject obj) { |
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125 | this.obj = obj; |
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126 | } |
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127 | } |
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