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annotate src/luan/modules/ThreadLuan.java @ 1202:d3a3ca116e42

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gc site instances
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 05 Mar 2018 19:30:51 -0700
parents 7ef40e1923b7
children 3ffc7c4a3b85
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rev   line source
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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
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21
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22 public final class ThreadLuan {
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23 private static final Executor exec = Executors.newCachedThreadPool();
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24 public static final ScheduledThreadPoolExecutor scheduler = new ScheduledThreadPoolExecutor(1);
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25
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26 public static void fork(LuanState luan,LuanFunction fn,Object... args) {
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27 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE);
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28 final LuanState newLuan = (LuanState)cloner.clone(luan);
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29 final LuanFunction newFn = (LuanFunction)cloner.get(fn);
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30 final Object[] newArgs = cloner.clone(args);
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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,newArgs);
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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,boolean repeat,LuanFunction fn,Object... args) {
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52 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE);
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53 final LuanState newLuan = (LuanState)cloner.clone(luan);
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54 final LuanFunction newFn = (LuanFunction)cloner.get(fn);
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55 final Object[] newArgs = cloner.clone(args);
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56 Runnable r = new Runnable(){public void run() {
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57 try {
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58 newFn.call(newLuan,newArgs);
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59 } catch(LuanException e) {
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60 e.printStackTrace();
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61 }
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62 }};
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63 final ScheduledFuture sf;
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64 if( repeat ) {
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65 sf = scheduler.scheduleWithFixedDelay(r,delay,delay,TimeUnit.MILLISECONDS);
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66 } else {
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67 sf = scheduler.schedule(r,delay,TimeUnit.MILLISECONDS);
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68 }
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69 final Closeable c = new Closeable(){public void close(){
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70 boolean b = sf.cancel(false);
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71 }};
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72 newLuan.registry().put(luan,luan); // prevent gc
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73 luan.registry().put(c,c); // prevent gc
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74 luan.onClose(c);
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75 }
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76
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77 /*
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78 public static class GlobalMap {
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79
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80 private static class Value {
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81 final long time = System.currentTimeMillis();
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82 final Object v;
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83
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84 Value(Object v) {
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85 this.v = v;
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86 }
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87 }
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88
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89 public long timeout = 60000L; // one minute
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90 private Map<String,Value> map = new LinkedHashMap<String,Value>() {
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91 protected boolean removeEldestEntry(Map.Entry<String,Value> eldest) {
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92 return eldest.getValue().time < System.currentTimeMillis() - timeout;
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93 }
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94 };
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95
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96 public synchronized Object get(String key) {
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97 Value val = map.get(key);
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98 return val==null ? null : val.v;
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99 }
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100
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101 public synchronized Object put(String key,Object v) throws LuanException {
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102 Value val;
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103 if( v == null ) {
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104 val = map.remove(key);
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105 } else {
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106 if( !(v instanceof String || v instanceof Boolean || v instanceof Number) )
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107 throw new LuanException("can't assign type "+Luan.type(v)+" to Thread.global");
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108 val = map.put(key,new Value(v));
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109 }
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110 return val==null ? null : val.v;
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111 }
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112 }
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113 */
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114
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115 public static void sleep(long millis) throws InterruptedException {
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116 Thread.sleep(millis);
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117 }
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118
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119
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120 private static boolean isPrimitive(Object v) {
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121 if( v instanceof Object[] ) {
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122 Object[] a = (Object[])v;
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123 for( Object obj : a ) {
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124 if( !isPrimitive(obj) )
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125 return false;
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126 }
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127 return true;
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128 } else {
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129 return v==null || v instanceof String || v instanceof Boolean || v instanceof Number;
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130 }
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131 }
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132
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133 public static final class Callable {
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134 private long expires;
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135 private final LuanState luan = new LuanState();
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136 private final LuanTable fns;
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137
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138 Callable(LuanState luan,LuanTable fns) {
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139 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE);
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140 this.fns = (LuanTable)cloner.get(fns);
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141 }
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142
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143 public synchronized Object call(String fnName,Object... args) throws LuanException {
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144 if( !isPrimitive(args) )
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145 throw new LuanException("can't pass non-primitive type to global_callable "+Arrays.asList(args));
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146 Object f = fns.get(luan,fnName);
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147 if( f == null )
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148 throw new LuanException("function '"+fnName+"' not found in global_callable");
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149 if( !(f instanceof LuanFunction) )
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150 throw new LuanException("value of '"+fnName+"' not a function in global_callable");
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151 LuanFunction fn = (LuanFunction)f;
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152 Object rtn = fn.call(luan,args);
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153 if( !isPrimitive(rtn) )
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154 throw new LuanException("can't return non-primitive type from global_callable");
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155 return rtn;
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156 }
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157 }
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158
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159 private static Map<String,Callable> callableMap = new HashMap<String,Callable>();
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160
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161 private static void sweep() {
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162 long now = System.currentTimeMillis();
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163 for( Iterator<Callable> iter = callableMap.values().iterator(); iter.hasNext(); ) {
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164 Callable callable = iter.next();
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165 if( callable.expires < now )
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166 iter.remove();
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167 }
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168 }
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169
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170 public static synchronized Callable globalCallable(LuanState luan,String name,long timeout,LuanTable fns) {
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171 Callable callable = callableMap.get(name);
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172 if( callable == null ) {
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173 sweep();
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174 callable = new Callable(luan,fns);
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175 callableMap.put(name,callable);
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176 }
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177 callable.expires = System.currentTimeMillis() + timeout;
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178 return callable;
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179 }
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180
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181 public static synchronized void removeGlobalCallable(String name) {
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182 callableMap.remove(name);
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183 }
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184
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185 }