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1 /*
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2 Copyright (c) 2008 Franklin Schmidt <fschmidt@gmail.com>
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3
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4 Permission is hereby granted, free of charge, to any person obtaining a copy
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5 of this software and associated documentation files (the "Software"), to deal
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6 in the Software without restriction, including without limitation the rights
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7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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8 copies of the Software, and to permit persons to whom the Software is
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9 furnished to do so, subject to the following conditions:
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10
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11 The above copyright notice and this permission notice shall be included in
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12 all copies or substantial portions of the Software.
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13
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14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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20 THE SOFTWARE.
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21 */
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22
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23 package fschmidt.util.java;
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24
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25 import org.slf4j.Logger;
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26 import org.slf4j.LoggerFactory;
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27
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28 import java.lang.reflect.Method;
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29 import java.lang.reflect.InvocationTargetException;
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30
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31
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32 public class ProxyIntoThread<T> extends ProxyClass<T> {
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33 private static final Logger logger = LoggerFactory.getLogger(ProxyIntoThread.class);
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34 private final long timeout;
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35 private volatile Thread thread;
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36 private final Object lock = new Object();
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37 private boolean isCalling = false;
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38 private Method method;
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39 private Object[] args;
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40 private Object rtn;
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41 private Throwable ex;
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42
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43 public ProxyIntoThread(String threadName,long timeout,final T obj,Class<T> cls) {
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44 super(obj,cls);
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45 this.timeout = timeout;
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46 logger.info("Name = " + threadName + " / timeout = " + timeout + " / isCalling = " + isCalling);
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47 thread = new Thread(
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48 new Runnable(){public void run(){
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49 synchronized(lock) {
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50 while(thread!=null) {
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51 while( !isCalling ) {
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52 try {
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53 lock.wait(ProxyIntoThread.this.timeout);
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54 } catch(InterruptedException e) {
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55 logger.error("",e);
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56 throw new RuntimeException(e);
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57 }
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58 if( !isCalling ) {
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59 logger.error("timed out");
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60 throw new RuntimeException("timed out");
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61 }
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62 }
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63 try {
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64 rtn = invoke(method,args);
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65 } catch(Throwable e) {
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66 ex = e;
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67 } finally {
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68 isCalling = false;
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69 lock.notifyAll();
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70 }
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71 }
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72 }
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73 }}
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74 , threadName
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75 );
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76 thread.start();
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77 }
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78
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79 public Object invoke(Object proxy,Method method,Object[] args)
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80 throws Throwable
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81 {
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82 synchronized(lock) {
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83 if( thread==null )
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84 throw new RuntimeException("thread died");
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85 if( isCalling )
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86 throw new RuntimeException("Already calling " + this.method.getName());
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87 this.method = method;
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88 this.args = args;
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89 this.ex = null;
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90 isCalling = true;
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91 lock.notifyAll();
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92 while( isCalling ) {
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93 try {
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94 lock.wait(timeout);
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95 } catch(InterruptedException e) {
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96 logger.error("",e);
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97 throw new RuntimeException(e);
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98 }
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99 if( isCalling ) {
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100 logger.error("timed out");
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101 throw new RuntimeException("timed out");
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102 }
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103 }
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104 if( ex != null )
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105 throw ex;
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106 return this.rtn;
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107 }
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108 }
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109
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110 public void stop() {
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111 thread = null;
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112 }
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113 }
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