Mercurial Hosting > luan
annotate src/luan/modules/http/LuanHandler.java @ 1351:21b153b4bcc4
better reset_luan for luanhost
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Mon, 04 Mar 2019 12:12:45 -0700 |
parents | d8754a50adf1 |
children | 1d31c1f3ea30 |
rev | line source |
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1171 | 1 package luan.modules.http; |
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2 |
1231 | 3 import java.io.Closeable; |
1160 | 4 import java.io.Writer; |
5 import java.io.PrintWriter; | |
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6 import java.io.IOException; |
1264 | 7 import java.lang.ref.Reference; |
8 import java.lang.ref.WeakReference; | |
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9 import java.lang.reflect.Method; |
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10 import java.net.BindException; |
1264 | 11 import java.util.List; |
12 import java.util.ArrayList; | |
13 import java.util.concurrent.locks.ReadWriteLock; | |
14 import java.util.concurrent.locks.ReentrantReadWriteLock; | |
1337 | 15 import luan.lib.logging.Logger; |
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16 import luan.lib.webserver.Request; |
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17 import luan.lib.webserver.Response; |
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18 import luan.lib.webserver.Status; |
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19 import luan.lib.webserver.Server; |
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20 import luan.lib.webserver.Handler; |
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21 import luan.lib.webserver.ResponseOutputStream; |
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22 import luan.Luan; |
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23 import luan.LuanTable; |
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24 import luan.LuanFunction; |
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25 import luan.LuanJavaFunction; |
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26 import luan.LuanCloner; |
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27 import luan.LuanException; |
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28 import luan.modules.PackageLuan; |
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29 import luan.modules.BasicLuan; |
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30 import luan.modules.logging.LuanLogger; |
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31 |
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32 |
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33 public final class LuanHandler implements Handler, Luan.OnClose { |
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34 private final Luan luanInit; |
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35 private final Logger logger; |
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36 private final ReadWriteLock lock = new ReentrantReadWriteLock(); |
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37 private final List<Reference<Closeable>> onClose = new ArrayList<Reference<Closeable>>(); |
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38 private volatile Luan currentLuan; |
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39 private volatile boolean isDisabled = false; |
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40 |
1186 | 41 private static final Method resetLuanMethod; |
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42 private static final Method evalInRootMethod; |
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43 private static final Method disableLuanMethod; |
1186 | 44 static { |
45 try { | |
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46 resetLuanMethod = LuanHandler.class.getMethod( "reset_luan" ); |
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47 evalInRootMethod = LuanHandler.class.getMethod( "eval_in_root", String.class ); |
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48 disableLuanMethod = LuanHandler.class.getMethod( "disable_luan" ); |
1186 | 49 } catch(NoSuchMethodException e) { |
50 throw new RuntimeException(e); | |
51 } | |
52 } | |
53 | |
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54 public LuanHandler(Luan luanInit) { |
1231 | 55 this.luanInit = luanInit; |
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56 this.logger = LuanLogger.getLogger(luanInit,LuanHandler.class.getName()); |
1186 | 57 try { |
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58 LuanTable Http = (LuanTable)luanInit.require("luan:http/Http.luan"); |
1350 | 59 if( Http.get("reset_luan") == null ) |
60 Http.put( "reset_luan", new LuanJavaFunction(luanInit,resetLuanMethod,this) ); | |
1335 | 61 Http.put( "eval_in_root", new LuanJavaFunction(luanInit,evalInRootMethod,this) ); |
62 Http.put( "disable_luan", new LuanJavaFunction(luanInit,disableLuanMethod,this) ); | |
1186 | 63 } catch(LuanException e) { |
64 throw new RuntimeException(e); | |
65 } | |
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66 currentLuan = newLuan(); |
1186 | 67 } |
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68 |
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69 private Luan newLuan() { |
1335 | 70 Luan luan; |
71 synchronized(luanInit) { | |
72 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); | |
73 luan = (Luan)cloner.clone(luanInit); | |
74 } | |
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75 luan.onClose = this; |
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76 try { |
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77 PackageLuan.load(luan,"site:/init.luan"); |
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78 } catch(LuanException e) { |
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79 //e.printStackTrace(); |
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80 String err = e.getLuanStackTraceString(); |
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81 logger.error(err); |
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82 } |
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83 return luan; |
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84 } |
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85 |
1264 | 86 /* |
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87 public Luan getLuan() { |
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88 return luan; |
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89 } |
1264 | 90 */ |
1160 | 91 @Override public Response handle(Request request) { |
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92 if( isDisabled ) |
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93 return null; |
1167 | 94 if( request.path.endsWith("/") ) |
95 return null; | |
96 String modName = "site:" + request.path +".luan"; | |
97 return handle(request,modName); | |
98 } | |
99 | |
100 Response handle(Request request,String modName) { | |
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101 Thread thread = Thread.currentThread(); |
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102 String oldName = thread.getName(); |
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103 thread.setName(request.headers.get("host")+request.path); |
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104 lock.readLock().lock(); |
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105 try { |
1335 | 106 return service(request,modName); |
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107 } catch(LuanException e) { |
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108 String err = e.getLuanStackTraceString(); |
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109 logger.error(err+"\n"+request.rawHead.trim()+"\n"); |
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110 String msg = "Internel Server Error\n\n" + err; |
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111 return Response.errorResponse( Status.INTERNAL_SERVER_ERROR, msg ); |
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112 } finally { |
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113 lock.readLock().unlock(); |
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114 thread.setName(oldName); |
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115 } |
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116 } |
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117 |
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118 public void onClose(Closeable c) { |
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119 synchronized(onClose) { |
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120 onClose.add(new WeakReference<Closeable>(c)); |
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121 } |
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122 } |
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123 |
1231 | 124 public void close() { |
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125 synchronized(onClose) { |
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126 for( Reference<Closeable> ref : onClose ) { |
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127 Closeable c = ref.get(); |
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128 if( c != null ) { |
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129 try { |
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130 c.close(); |
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131 } catch(IOException e) { |
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132 logger.error(c.toString(),e); |
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133 } |
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134 } |
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135 } |
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136 onClose.clear(); |
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137 } |
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138 } |
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139 |
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140 public Object call_rpc(String fnName,Object... args) throws LuanException { |
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141 lock.readLock().lock(); |
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142 try { |
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143 LuanFunction fn; |
1335 | 144 synchronized(luanInit) { |
145 enableLoad("luan:Rpc.luan"); | |
146 LuanTable rpc = (LuanTable)currentLuan.require("luan:Rpc.luan"); | |
1267 | 147 LuanTable fns = (LuanTable)rpc.get("functions"); |
148 fn = (LuanFunction)fns.get(fnName); | |
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149 if( fn == null ) |
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150 throw new LuanException( "function not found: " + fnName ); |
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151 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); |
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152 fn = (LuanFunction)cloner.get(fn); |
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153 } |
1335 | 154 return fn.call(args); |
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155 } finally { |
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156 lock.readLock().unlock(); |
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157 } |
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158 } |
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159 |
1186 | 160 public void reset_luan() { |
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161 lock.writeLock().lock(); |
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162 try { |
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163 close(); |
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164 currentLuan = newLuan(); |
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165 } finally { |
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166 lock.writeLock().unlock(); |
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167 } |
1186 | 168 } |
169 | |
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170 public void disable_luan() { |
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171 isDisabled = true; |
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172 } |
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173 |
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174 public Object runLuan(String sourceText,String sourceName) throws LuanException { |
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175 lock.readLock().lock(); |
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176 try { |
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177 Luan luan = currentLuan; |
1335 | 178 synchronized(luanInit) { |
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179 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); |
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180 Luan luan2 = (Luan)cloner.clone(luan); |
1335 | 181 LuanFunction fn = luan2.load(sourceText,sourceName); |
182 return fn.call(); | |
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183 } |
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184 } finally { |
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185 lock.readLock().unlock(); |
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186 } |
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187 } |
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188 |
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189 public void eval_in_root(String text) throws LuanException { |
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190 Luan luan; |
1335 | 191 synchronized(luanInit) { |
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192 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
1335 | 193 luan = (Luan)cloner.clone(currentLuan); |
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194 } |
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195 luan.onClose = this; |
1335 | 196 luan.load(text,"<eval_in_root>",null).call(); |
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197 currentLuan = luan; |
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198 } |
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199 |
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200 public static void start(Server server) throws Exception { |
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201 try { |
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202 server.start(); |
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203 } catch(BindException e) { |
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204 throw new LuanException(e.toString()); |
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205 } |
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206 } |
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207 |
1335 | 208 |
209 | |
210 // from HttpServicer | |
211 | |
212 private Response service(Request request,String modName) | |
213 throws LuanException | |
214 { | |
215 try { | |
216 return serviceLuan(request,modName); | |
217 } catch(LuanException e) { | |
218 return handleError(request,e); | |
219 } | |
220 } | |
221 | |
222 private Response handleError(Request request,LuanException e) | |
223 throws LuanException | |
224 { | |
225 //e.printStackTrace(); | |
226 Luan luan; | |
227 synchronized(luanInit) { | |
228 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); | |
229 luan = (Luan)cloner.clone(currentLuan); | |
230 } | |
231 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
232 return (Response)module.fn("handle_error").call( request, e.table(luan) ); | |
233 } | |
234 | |
235 private Response serviceLuan(Request request,String modName) | |
236 throws LuanException | |
237 { | |
238 LuanFunction fn; | |
239 Luan luan; | |
240 synchronized(luanInit) { | |
241 enableLoad("luan:http/Http.luan",modName); | |
242 PackageLuan.require(currentLuan,"luan:http/Http.luan"); | |
243 Object mod = PackageLuan.load(currentLuan,modName); | |
244 if( mod.equals(Boolean.FALSE) ) | |
245 return null; | |
246 if( !(mod instanceof LuanFunction) ) | |
247 throw new LuanException( "module '"+modName+"' must return a function" ); | |
248 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); | |
249 luan = (Luan)cloner.clone(currentLuan); | |
250 fn = (LuanFunction)cloner.get(mod); | |
251 } | |
252 | |
253 LuanTable module = (LuanTable)luan.require("luan:http/Http.luan"); | |
254 module.fn("new_request").call(request); | |
255 module.fn("new_response").call(); | |
256 | |
257 fn.call(); | |
258 | |
259 return (Response)module.fn("finish").call(); | |
260 } | |
261 | |
262 private void enableLoad(String... mods) throws LuanException { | |
263 LuanTable loaded = PackageLuan.loaded(currentLuan); | |
264 for( String mod : mods ) { | |
265 if( loaded.rawGet(mod) == null ) { | |
266 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); | |
267 currentLuan = (Luan)cloner.clone(currentLuan); | |
268 break; | |
269 } | |
270 } | |
271 } | |
272 | |
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273 } |