Mercurial Hosting > luan
annotate src/luan/modules/ThreadLuan.java @ 1372:431d5bec3ca4
add Thread.new_synchronizer
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Mon, 01 Jul 2019 15:37:51 -0600 |
parents | ae2321a09723 |
children | 8d7a39ca2c0c |
rev | line source |
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167
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merge luan/lib into modules
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1 package luan.modules; |
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2 |
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3 import java.io.Closeable; |
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4 import java.util.Arrays; |
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5 import java.util.Iterator; |
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6 import java.util.Map; |
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7 import java.util.HashMap; |
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8 import java.util.LinkedHashMap; |
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9 import java.util.concurrent.Executor; |
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10 import java.util.concurrent.Executors; |
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11 import java.util.concurrent.ScheduledExecutorService; |
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12 import java.util.concurrent.ScheduledFuture; |
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13 import java.util.concurrent.TimeUnit; |
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14 import java.util.concurrent.locks.Lock; |
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15 import java.util.concurrent.locks.ReadWriteLock; |
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16 import java.util.concurrent.locks.ReentrantLock; |
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17 import java.util.concurrent.locks.ReentrantReadWriteLock; |
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18 import luan.Luan; |
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19 import luan.LuanFunction; |
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20 import luan.LuanTable; |
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21 import luan.LuanException; |
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22 import luan.LuanCloner; |
1322 | 23 import luan.LuanCloneable; |
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24 |
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25 |
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26 public final class ThreadLuan { |
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27 private static final Executor exec = Executors.newCachedThreadPool(); |
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28 public static final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1); |
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29 |
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30 private static Runnable runnable(final LuanFunction fn) { |
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31 return new Runnable() { |
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32 public synchronized void run() { |
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33 try { |
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34 fn.call(); |
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35 } catch(LuanException e) { |
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36 e.printStackTrace(); |
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37 } |
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38 } |
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39 }; |
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40 } |
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41 |
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42 public static void fork(LuanFunction fn) { |
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43 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
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44 final LuanFunction newFn = (LuanFunction)cloner.get(fn); |
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45 exec.execute(runnable(newFn)); |
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46 } |
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47 |
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48 public static void schedule(LuanFunction fn,LuanTable options) |
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49 throws LuanException |
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50 { |
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51 Map map = options.asMap(); |
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52 Number delay = (Number)map.remove("delay"); |
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53 Number repeatingDelay = (Number)map.remove("repeating_delay"); |
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54 Number repeatingRate = (Number)map.remove("repeating_rate"); |
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55 boolean daemon = Boolean.TRUE.equals(map.remove("daemon")); |
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56 final boolean runOnClose = Boolean.TRUE.equals(map.remove("run_on_close")); |
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57 if( repeatingDelay!=null && repeatingRate!=null ) |
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58 throw new LuanException("can't define both repeating_delay and repeating_rate"); |
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59 boolean repeating = repeatingDelay!=null || repeatingRate!=null; |
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60 if( !map.isEmpty() ) |
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61 throw new LuanException( "unrecognized options: "+map ); |
1335 | 62 Luan luan = fn.luan(); |
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63 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
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64 final Luan newLuan = (Luan)cloner.clone(luan); |
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65 final LuanFunction newFn = (LuanFunction)cloner.get(fn); |
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66 final Runnable r = runnable(newFn); |
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67 final ScheduledFuture sf; |
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68 if( repeatingDelay != null ) { |
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69 if( delay==null ) |
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70 delay = repeatingDelay; |
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71 sf = scheduler.scheduleWithFixedDelay(r,delay.longValue(),repeatingDelay.longValue(),TimeUnit.MILLISECONDS); |
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72 } else if( repeatingRate != null ) { |
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73 if( delay==null ) |
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74 delay = repeatingRate; |
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75 sf = scheduler.scheduleWithFixedDelay(r,delay.longValue(),repeatingRate.longValue(),TimeUnit.MILLISECONDS); |
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76 } else if( delay != null ) { |
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77 sf = scheduler.schedule(r,delay.longValue(),TimeUnit.MILLISECONDS); |
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78 } else if( runOnClose ) { |
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79 Closeable c = new Closeable(){public void close(){ |
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80 scheduler.schedule(r,0L,TimeUnit.MILLISECONDS); |
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81 }}; |
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82 luan.registry().put(c,c); // prevent gc |
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83 luan.onClose(c); |
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84 return; |
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85 } else { |
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86 scheduler.schedule(r,0L,TimeUnit.MILLISECONDS); |
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87 return; |
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88 } |
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89 Closeable c = new Closeable(){public void close(){ |
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90 boolean b = sf.cancel(false); |
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91 if( runOnClose ) |
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92 scheduler.schedule(r,0L,TimeUnit.MILLISECONDS); |
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93 }}; |
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94 if( !daemon ) |
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95 newLuan.registry().put(luan,luan); // prevent gc |
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96 luan.registry().put(c,c); // prevent gc |
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97 luan.onClose(c); |
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98 } |
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99 |
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100 /* |
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101 public static class GlobalMap { |
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102 |
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103 private static class Value { |
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104 final long time = System.currentTimeMillis(); |
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105 final Object v; |
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106 |
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107 Value(Object v) { |
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108 this.v = v; |
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109 } |
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110 } |
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111 |
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112 public long timeout = 60000L; // one minute |
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113 private Map<String,Value> map = new LinkedHashMap<String,Value>() { |
1080 | 114 protected boolean removeEldestEntry(Map.Entry<String,Value> eldest) { |
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115 return eldest.getValue().time < System.currentTimeMillis() - timeout; |
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116 } |
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117 }; |
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118 |
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119 public synchronized Object get(String key) { |
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120 Value val = map.get(key); |
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121 return val==null ? null : val.v; |
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122 } |
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123 |
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124 public synchronized Object put(String key,Object v) throws LuanException { |
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125 Value val; |
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126 if( v == null ) { |
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127 val = map.remove(key); |
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128 } else { |
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129 if( !(v instanceof String || v instanceof Boolean || v instanceof Number) ) |
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130 throw new LuanException("can't assign type "+Luan.type(v)+" to Thread.global"); |
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131 val = map.put(key,new Value(v)); |
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132 } |
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133 return val==null ? null : val.v; |
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134 } |
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135 } |
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136 */ |
1104 | 137 |
138 public static void sleep(long millis) throws InterruptedException { | |
139 Thread.sleep(millis); | |
140 } | |
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141 |
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142 |
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143 private static class Unsafe { |
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144 private final String reason; |
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145 |
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146 Unsafe(String reason) { |
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147 this.reason = reason; |
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148 } |
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149 } |
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150 |
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151 private static Object makeSafe(Luan luan,Object v) throws LuanException { |
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152 if( v instanceof LuanTable ) { |
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153 LuanTable tbl = (LuanTable)v; |
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154 if( tbl.getMetatable() != null ) |
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155 return new Unsafe("table with metatable"); |
1267 | 156 LuanTable rtn = new LuanTable(luan); |
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157 for( Map.Entry entry : tbl.rawIterable() ) { |
1267 | 158 Object key = makeSafe( luan, entry.getKey() ); |
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159 if( key instanceof Unsafe ) |
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160 return key; |
1267 | 161 Object value = makeSafe( luan, entry.getValue() ); |
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162 if( value instanceof Unsafe ) |
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163 return value; |
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164 rtn.rawPut(key,value); |
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165 } |
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166 return rtn; |
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167 } else if( v instanceof Object[] ) { |
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168 Object[] a = (Object[])v; |
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169 for( int i=0; i<a.length; i++ ) { |
1267 | 170 Object obj = makeSafe(luan,a[i]); |
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171 if( obj instanceof Unsafe ) |
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172 return obj; |
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173 a[i] = obj; |
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174 } |
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175 return a; |
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176 } else { |
1322 | 177 if( v instanceof LuanCloneable ) |
178 return new Unsafe("type "+Luan.type(v)); | |
179 return v; | |
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180 } |
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181 } |
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182 |
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183 public static final class Callable { |
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184 private long expires; |
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185 private final Luan luan = new Luan(); |
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186 private final LuanTable fns; |
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187 |
1335 | 188 Callable(LuanTable fns) { |
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189 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
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190 this.fns = (LuanTable)cloner.get(fns); |
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191 } |
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192 |
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193 public synchronized Object call(Luan callerLuan,String fnName,Object... args) throws LuanException { |
1267 | 194 Object obj = makeSafe(luan,args); |
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195 if( obj instanceof Unsafe ) |
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196 throw new LuanException("can't pass "+((Unsafe)obj).reason+" to global_callable "+Arrays.asList(args)); |
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197 args = (Object[])obj; |
1267 | 198 Object f = fns.get(fnName); |
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199 if( f == null ) |
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200 throw new LuanException("function '"+fnName+"' not found in global_callable"); |
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201 if( !(f instanceof LuanFunction) ) |
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202 throw new LuanException("value of '"+fnName+"' not a function in global_callable"); |
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203 LuanFunction fn = (LuanFunction)f; |
1335 | 204 Object rtn = fn.call(args); |
1267 | 205 rtn = makeSafe(callerLuan,rtn); |
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206 if( rtn instanceof Unsafe ) |
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207 throw new LuanException("can't return "+((Unsafe)rtn).reason+" from global_callable"); |
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208 return rtn; |
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209 } |
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210 } |
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211 |
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212 private static Map<String,Callable> callableMap = new HashMap<String,Callable>(); |
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213 |
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214 private static void sweep() { |
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215 long now = System.currentTimeMillis(); |
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216 for( Iterator<Callable> iter = callableMap.values().iterator(); iter.hasNext(); ) { |
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217 Callable callable = iter.next(); |
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218 if( callable.expires < now ) |
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219 iter.remove(); |
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220 } |
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221 } |
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222 |
1335 | 223 public static synchronized Callable globalCallable(String name,LuanTable fns,long timeout) { |
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224 Callable callable = callableMap.get(name); |
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225 if( callable == null ) { |
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226 sweep(); |
1335 | 227 callable = new Callable(fns); |
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228 callableMap.put(name,callable); |
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229 } |
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230 callable.expires = System.currentTimeMillis() + timeout; |
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231 return callable; |
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232 } |
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233 |
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234 public static synchronized void removeGlobalCallable(String name) { |
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235 callableMap.remove(name); |
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236 } |
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237 |
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238 |
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239 public static final ReadWriteLock backupLock = new ReentrantReadWriteLock(); |
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240 |
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241 public static Object runInLock(Lock lock,LuanFunction fn,Object... args) |
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242 throws LuanException, InterruptedException |
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243 { |
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244 if( !lock.tryLock(10,TimeUnit.MINUTES) ) |
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245 throw new LuanException("failed to acquire lock"); |
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246 try { |
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247 return fn.call(args); |
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248 } finally { |
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249 lock.unlock(); |
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250 } |
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251 } |
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252 |
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253 } |