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annotate src/luan/modules/ThreadLuan.java @ 1322:d5739c101bd6

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improve Thread
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 06 Feb 2019 01:11:12 -0700
parents 70eecde81820
children f41919741100
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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4c0131c2b650 merge luan/lib into modules
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diff changeset
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.ScheduledThreadPoolExecutor;
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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 luan.Luan;
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15 import luan.LuanState;
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16 import luan.LuanFunction;
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17 import luan.LuanTable;
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18 import luan.LuanException;
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19 import luan.LuanCloner;
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20 import luan.LuanCloneable;
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22
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23 public final class ThreadLuan {
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24 private static final Executor exec = Executors.newCachedThreadPool();
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25 public static final ScheduledThreadPoolExecutor scheduler = new ScheduledThreadPoolExecutor(1);
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26
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27 public static void fork(LuanState luan,LuanFunction fn) {
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28 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE);
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29 final LuanState newLuan = (LuanState)cloner.clone(luan);
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30 final LuanFunction newFn = (LuanFunction)cloner.get(fn);
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31 exec.execute(new Runnable(){public void run() {
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32 try {
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33 newFn.call(newLuan);
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34 } catch(LuanException e) {
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35 e.printStackTrace();
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36 }
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37 }});
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38 }
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39 /*
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40 public static LuanFunction synchronized_(final LuanState luan,final LuanFunction fn) throws LuanException {
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41 Utils.checkNotNull(fn);
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42 return new LuanFunction() {
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43 @Override public Object call(LuanState ingored,Object[] args) throws LuanException {
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44 synchronized(luan) {
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45 return fn.call(luan,args);
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46 }
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47 }
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48 };
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49 }
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50 */
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51 public static void schedule(LuanState luan,long delay,LuanFunction fn,String repeating)
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52 throws LuanException
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53 {
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54 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE);
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55 final LuanState newLuan = (LuanState)cloner.clone(luan);
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56 final LuanFunction newFn = (LuanFunction)cloner.get(fn);
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57 Runnable r = new Runnable(){public void run() {
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58 try {
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59 newFn.call(newLuan);
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60 } catch(LuanException e) {
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61 e.printStackTrace();
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62 }
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63 }};
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64 final ScheduledFuture sf;
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65 if( repeating==null ) {
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66 sf = scheduler.schedule(r,delay,TimeUnit.MILLISECONDS);
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67 } else if( repeating.equals("with_fixed_delay") ) {
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68 sf = scheduler.scheduleWithFixedDelay(r,delay,delay,TimeUnit.MILLISECONDS);
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69 } else if( repeating.equals("at_fixed_rate") ) {
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70 sf = scheduler.scheduleAtFixedRate(r,delay,delay,TimeUnit.MILLISECONDS);
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71 } else {
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72 throw new LuanException("repeating must be nil or 'with_fixed_delay' or 'at_fixed_rate'");
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73 }
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74 final Closeable c = new Closeable(){public void close(){
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75 boolean b = sf.cancel(false);
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76 }};
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77 newLuan.registry().put(luan,luan); // prevent gc
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78 luan.registry().put(c,c); // prevent gc
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79 luan.onClose(c);
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80 }
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81
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82 /*
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83 public static class GlobalMap {
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84
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85 private static class Value {
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86 final long time = System.currentTimeMillis();
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87 final Object v;
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88
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89 Value(Object v) {
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90 this.v = v;
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91 }
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92 }
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93
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94 public long timeout = 60000L; // one minute
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95 private Map<String,Value> map = new LinkedHashMap<String,Value>() {
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96 protected boolean removeEldestEntry(Map.Entry<String,Value> eldest) {
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97 return eldest.getValue().time < System.currentTimeMillis() - timeout;
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98 }
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99 };
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100
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101 public synchronized Object get(String key) {
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102 Value val = map.get(key);
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103 return val==null ? null : val.v;
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104 }
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105
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106 public synchronized Object put(String key,Object v) throws LuanException {
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107 Value val;
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108 if( v == null ) {
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109 val = map.remove(key);
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110 } else {
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111 if( !(v instanceof String || v instanceof Boolean || v instanceof Number) )
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112 throw new LuanException("can't assign type "+Luan.type(v)+" to Thread.global");
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113 val = map.put(key,new Value(v));
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114 }
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115 return val==null ? null : val.v;
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116 }
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117 }
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118 */
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119
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120 public static void sleep(long millis) throws InterruptedException {
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121 Thread.sleep(millis);
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122 }
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123
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124
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125 private static class Unsafe {
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126 private final String reason;
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127
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128 Unsafe(String reason) {
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129 this.reason = reason;
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130 }
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131 }
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132
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133 private static Object makeSafe(LuanState luan,Object v) {
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134 if( v instanceof LuanTable ) {
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135 LuanTable tbl = (LuanTable)v;
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136 if( tbl.getMetatable() != null )
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137 return new Unsafe("table with metatable");
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138 LuanTable rtn = new LuanTable(luan);
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139 for( Map.Entry entry : tbl.rawIterable() ) {
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140 Object key = makeSafe( luan, entry.getKey() );
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141 if( key instanceof Unsafe )
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142 return key;
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143 Object value = makeSafe( luan, entry.getValue() );
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144 if( value instanceof Unsafe )
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145 return value;
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146 rtn.rawPut(key,value);
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147 }
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148 return rtn;
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149 } else if( v instanceof Object[] ) {
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150 Object[] a = (Object[])v;
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151 for( int i=0; i<a.length; i++ ) {
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152 Object obj = makeSafe(luan,a[i]);
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153 if( obj instanceof Unsafe )
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154 return obj;
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155 a[i] = obj;
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156 }
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157 return a;
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158 } else {
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159 if( v instanceof LuanCloneable )
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160 return new Unsafe("type "+Luan.type(v));
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161 return v;
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162 }
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163 }
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164
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165 public static final class Callable {
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166 private long expires;
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167 private final LuanState luan = new LuanState();
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168 private final LuanTable fns;
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169
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170 Callable(LuanState luan,LuanTable fns) {
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171 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE);
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172 this.fns = (LuanTable)cloner.get(fns);
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173 }
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174
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175 public synchronized Object call(LuanState callerLuan,String fnName,Object... args) throws LuanException {
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176 Object obj = makeSafe(luan,args);
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177 if( obj instanceof Unsafe )
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178 throw new LuanException("can't pass "+((Unsafe)obj).reason+" to global_callable "+Arrays.asList(args));
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179 args = (Object[])obj;
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180 Object f = fns.get(fnName);
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181 if( f == null )
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182 throw new LuanException("function '"+fnName+"' not found in global_callable");
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183 if( !(f instanceof LuanFunction) )
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184 throw new LuanException("value of '"+fnName+"' not a function in global_callable");
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185 LuanFunction fn = (LuanFunction)f;
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186 Object rtn = fn.call(luan,args);
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187 rtn = makeSafe(callerLuan,rtn);
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188 if( rtn instanceof Unsafe )
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189 throw new LuanException("can't return "+((Unsafe)rtn).reason+" from global_callable");
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190 return rtn;
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191 }
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192 }
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193
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194 private static Map<String,Callable> callableMap = new HashMap<String,Callable>();
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195
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196 private static void sweep() {
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197 long now = System.currentTimeMillis();
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198 for( Iterator<Callable> iter = callableMap.values().iterator(); iter.hasNext(); ) {
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199 Callable callable = iter.next();
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200 if( callable.expires < now )
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201 iter.remove();
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202 }
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203 }
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204
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205 public static synchronized Callable globalCallable(LuanState luan,String name,LuanTable fns,long timeout) {
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206 Callable callable = callableMap.get(name);
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207 if( callable == null ) {
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208 sweep();
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209 callable = new Callable(luan,fns);
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210 callableMap.put(name,callable);
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211 }
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212 callable.expires = System.currentTimeMillis() + timeout;
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213 return callable;
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214 }
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215
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216 public static synchronized void removeGlobalCallable(String name) {
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217 callableMap.remove(name);
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218 }
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219
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220 }