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annotate src/luan/modules/http/impl/LuanHandler.java @ 1161:6baccd0c85a7

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minor
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 05 Feb 2018 22:59:52 -0700
parents 4beabb087be6
children 7e6f28c769a1
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diff changeset
1 package luan.modules.http.impl;
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2
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3 import java.io.Writer;
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4 import java.io.PrintWriter;
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5 import java.io.IOException;
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6 import java.lang.reflect.Method;
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7 import java.net.BindException;
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8 import java.util.concurrent.locks.ReadWriteLock;
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9 import java.util.concurrent.locks.ReentrantReadWriteLock;
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10 import javax.servlet.http.HttpServletRequest;
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11 import javax.servlet.http.HttpServletResponse;
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12 import org.slf4j.Logger;
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13 import org.slf4j.LoggerFactory;
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14 import luan.webserver.Request;
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15 import luan.webserver.Response;
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16 import luan.webserver.Server;
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17 import luan.webserver.Handler;
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18 import luan.webserver.Status;
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19 import luan.webserver.ResponseOutputStream;
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20 import luan.Luan;
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21 import luan.LuanState;
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22 import luan.LuanTable;
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23 import luan.LuanFunction;
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24 import luan.LuanJavaFunction;
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25 import luan.LuanCloner;
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26 import luan.LuanException;
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27 import luan.modules.PackageLuan;
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29
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30 public class LuanHandler implements Handler {
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31 private final LuanState luanInit;
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32 private final Logger logger;
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33 private final ReadWriteLock lock = new ReentrantReadWriteLock();
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34 private LuanState luan;
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35
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36 private static final Method resetLuanMethod;
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37 static {
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38 try {
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39 resetLuanMethod = LuanHandler.class.getMethod("reset_luan");
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40 } catch(NoSuchMethodException e) {
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41 throw new RuntimeException(e);
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42 }
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43 }
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44
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45 public LuanHandler(LuanState luan,String loggerRoot) {
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46 this.luanInit = luan;
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47 if( loggerRoot==null )
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48 loggerRoot = "";
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49 logger = LoggerFactory.getLogger(loggerRoot+LuanHandler.class.getName());
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50 try {
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51 LuanTable Http = (LuanTable)PackageLuan.require(luanInit,"luan:http/Http.luan");
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52 Http.rawPut( "reset_luan", new LuanJavaFunction(resetLuanMethod,this) );
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53 } catch(LuanException e) {
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54 throw new RuntimeException(e);
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55 }
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56 setLuan();
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57 }
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58
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59 @Override public Response handle(Request request) {
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60 Thread thread = Thread.currentThread();
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61 String oldName = thread.getName();
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62 thread.setName(request.headers.get("host")+request.path);
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63 lock.readLock().lock();
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64 try {
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65 Response response = HttpServicer.service(luan,request);
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66 return response;
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67 } catch(LuanException e) {
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68 //e.printStackTrace();
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69 String err = e.getLuanStackTraceString();
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70 logger.error(err);
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71 String msg = "Internel Server Error\n\n" + err;
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72 return Response.errorResponse( Status.INTERNAL_SERVER_ERROR, msg );
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73 } finally {
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74 lock.readLock().unlock();
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75 thread.setName(oldName);
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76 }
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77 }
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78 /*
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79 @Override protected void doStart() throws Exception {
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80 // Thread.dumpStack();
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81 //System.out.println("qqqqqqqqqqqqqqqqqqqq doStart "+this);
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82 setLuan();
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83 super.doStart();
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84 }
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85
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86 @Override protected void doStop() throws Exception {
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87 synchronized(luan) {
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88 luan.close();
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89 }
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90 //System.out.println("qqqqqqqqqqqqqqqqqqqq doStop "+this);
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91 super.doStop();
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92 }
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93 */
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94 public Object call_rpc(String fnName,Object... args) throws LuanException {
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95 lock.readLock().lock();
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96 try {
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97 LuanFunction fn;
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98 LuanState luan = this.luan;
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99 synchronized(luan) {
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100 PackageLuan.enableLoad(luan,"luan:Rpc.luan");
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101 LuanTable rpc = (LuanTable)PackageLuan.require(luan,"luan:Rpc.luan");
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102 LuanTable fns = (LuanTable)rpc.get(luan,"functions");
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103 fn = (LuanFunction)fns.get(luan,fnName);
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104 if( fn == null )
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105 throw new LuanException( "function not found: " + fnName );
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106 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL);
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107 luan = (LuanState)cloner.clone(luan);
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108 fn = (LuanFunction)cloner.get(fn);
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109 }
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110 return fn.call(luan,args);
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111 } finally {
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112 lock.readLock().unlock();
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113 }
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114 }
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115
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116 public void reset_luan() {
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117 new Thread() {
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118 public void run() {
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119 lock.writeLock().lock();
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120 try {
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121 synchronized(luan) {
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122 luan.close();
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123 setLuan();
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124 }
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125 } catch(IOException e) {
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126 logger.error("reset_luan failed",e);
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127 } finally {
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128 lock.writeLock().unlock();
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129 }
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130 }
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131 }.start();
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132 }
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133
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134 private void setLuan() {
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135 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE);
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136 luan = (LuanState)cloner.clone(luanInit);
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137 try {
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138 PackageLuan.load(luan,"site:/init.luan");
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139 } catch(LuanException e) {
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140 String err = e.getLuanStackTraceString();
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141 logger.error(err);
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142 }
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143 }
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144
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145 public Object runLuan(String sourceText,String sourceName) throws LuanException {
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146 LuanFunction fn = Luan.load(sourceText,sourceName);
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147 synchronized(luan) {
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148 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL);
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149 LuanState luan = (LuanState)cloner.clone(this.luan);
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150 return fn.call(luan);
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151 }
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152 }
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153
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154 public static void start(Server server) throws Exception {
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155 try {
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156 server.start();
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157 } catch(BindException e) {
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158 throw new LuanException(e.toString());
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159 }
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160 }
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161
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162 }