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annotate src/luan/modules/http/LuanHandler.java @ 800:e2a446c5c7c4

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minor
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 07 Sep 2016 20:16:28 -0600
parents 9eccfede1094
children dfa742c663f9 ca968ef1747a
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rev   line source
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2b9bc97f0439 change luan:web to luan:http
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1 package luan.modules.http;
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2
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3 import java.io.IOException;
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4 import java.lang.reflect.Method;
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5 import java.util.concurrent.locks.ReadWriteLock;
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6 import java.util.concurrent.locks.ReentrantReadWriteLock;
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7 import javax.servlet.http.HttpServletRequest;
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8 import javax.servlet.http.HttpServletResponse;
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9 import org.slf4j.Logger;
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10 import org.slf4j.LoggerFactory;
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11 import org.eclipse.jetty.server.Request;
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12 import org.eclipse.jetty.server.handler.AbstractHandler;
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13 import luan.Luan;
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14 import luan.LuanState;
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15 import luan.LuanTable;
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16 import luan.LuanFunction;
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17 import luan.LuanJavaFunction;
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18 import luan.LuanCloner;
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19 import luan.LuanException;
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20 import luan.modules.PackageLuan;
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23 public class LuanHandler extends AbstractHandler {
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24 private final LuanState luanInit;
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25 private final Logger logger;
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26 private String welcomeFile = "index.html";
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27 private final ReadWriteLock lock = new ReentrantReadWriteLock();
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28 private LuanState luan;
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29
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30 private static final Method resetLuanMethod;
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31 static {
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32 try {
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33 resetLuanMethod = LuanHandler.class.getMethod("reset_luan");
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34 } catch(NoSuchMethodException e) {
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35 throw new RuntimeException(e);
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36 }
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37 }
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38
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39 public LuanHandler(LuanState luan,String loggerRoot) {
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40 this.luanInit = luan;
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41 if( loggerRoot==null )
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42 loggerRoot = "";
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43 logger = LoggerFactory.getLogger(loggerRoot+LuanHandler.class.getName());
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44 try {
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45 LuanTable Http = (LuanTable)PackageLuan.require(luanInit,"luan:http/Http.luan");
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46 Http.rawPut( "reset_luan", new LuanJavaFunction(resetLuanMethod,this) );
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47 } catch(LuanException e) {
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48 throw new RuntimeException(e);
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49 }
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50 }
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51
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52 @Override public void handle(String target,Request baseRequest,HttpServletRequest request,HttpServletResponse response)
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53 throws IOException
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54 {
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55 if( target.endsWith("/") )
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56 target += welcomeFile;
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57 Thread thread = Thread.currentThread();
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58 String oldName = thread.getName();
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59 thread.setName(request.getHeader("host")+request.getRequestURI());
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60 lock.readLock().lock();
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61 try {
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62 if( !HttpServicer.service(luan,request,response,"site:"+target+".luan") )
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63 return;
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64 } catch(LuanException e) {
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65 //e.printStackTrace();
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66 String err = e.getFullMessage();
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67 logger.error(err);
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68 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,err);
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69 } finally {
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70 lock.readLock().unlock();
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71 thread.setName(oldName);
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72 }
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73 baseRequest.setHandled(true);
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74 }
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75
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76 public void setWelcomeFile(String welcomeFile) {
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77 this.welcomeFile = welcomeFile;
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78 }
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79
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80 @Override protected void doStart() throws Exception {
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81 // Thread.dumpStack();
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82 //System.out.println("qqqqqqqqqqqqqqqqqqqq doStart "+this);
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83 setLuan();
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84 super.doStart();
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85 }
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86
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87 @Override protected void doStop() throws Exception {
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88 synchronized(luan) {
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89 luan.close();
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90 }
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91 //System.out.println("qqqqqqqqqqqqqqqqqqqq doStop "+this);
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92 super.doStop();
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93 }
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94 /*
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95 @Override public void destroy() {
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96 System.out.println("qqqqqqqqqqqqqqqqqqqq destroy "+this);
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97 super.destroy();
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98 }
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99 */
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100
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101 public Object call_rpc(String fnName,Object... args) throws LuanException {
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102 lock.readLock().lock();
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103 try {
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104 LuanFunction fn;
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105 LuanState luan = this.luan;
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106 synchronized(luan) {
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107 PackageLuan.enableLoad(luan,"luan:Rpc.luan");
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108 LuanTable rpc = (LuanTable)PackageLuan.require(luan,"luan:Rpc.luan");
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109 LuanTable fns = (LuanTable)rpc.get(luan,"functions");
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110 fn = (LuanFunction)fns.get(luan,fnName);
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111 if( fn == null )
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112 throw new LuanException( "function not found: " + fnName );
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113 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL);
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114 luan = (LuanState)cloner.clone(luan);
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115 fn = (LuanFunction)cloner.get(fn);
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116 }
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117 return fn.call(luan,args);
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118 } finally {
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119 lock.readLock().unlock();
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120 }
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121 }
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122
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123 public void reset_luan() {
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124 new Thread() {
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125 public void run() {
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126 lock.writeLock().lock();
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127 try {
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128 synchronized(luan) {
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129 luan.close();
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130 setLuan();
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131 }
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132 } catch(IOException e) {
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133 logger.error("reset_luan failed",e);
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134 } finally {
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135 lock.writeLock().unlock();
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136 }
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137 }
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138 }.start();
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139 }
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140
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141 private void setLuan() {
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142 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE);
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143 luan = (LuanState)cloner.clone(luanInit);
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144 try {
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145 PackageLuan.load(luan,"site:/init.luan");
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146 } catch(LuanException e) {
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147 String err = e.getFullMessage();
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148 logger.error(err);
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149 }
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150 }
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151
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152 public Object runLuan(String sourceText,String sourceName) throws LuanException {
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153 LuanFunction fn = Luan.load(sourceText,sourceName);
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154 synchronized(luan) {
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155 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL);
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156 LuanState luan = (LuanState)cloner.clone(this.luan);
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157 return fn.call(luan);
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158 }
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159 }
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160
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161 }