Mercurial Hosting > luan
annotate src/luan/modules/http/LuanHandler.java @ 1004:3fa54d9d19cd
better handling of BindException
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sat, 22 Oct 2016 23:00:57 -0600 |
parents | 32d4b569567c |
children | 0d884377e923 |
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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.net.BindException; |
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6 import java.util.concurrent.locks.ReadWriteLock; |
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7 import java.util.concurrent.locks.ReentrantReadWriteLock; |
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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.Server; |
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13 import org.eclipse.jetty.server.handler.AbstractHandler; |
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14 import luan.Luan; |
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15 import luan.LuanState; |
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16 import luan.LuanTable; |
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17 import luan.LuanFunction; |
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18 import luan.LuanJavaFunction; |
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19 import luan.LuanCloner; |
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20 import luan.LuanException; |
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21 import luan.modules.PackageLuan; |
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22 |
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23 |
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24 public class LuanHandler extends AbstractHandler { |
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25 private final LuanState luanInit; |
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26 private final Logger logger; |
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27 private String welcomeFile = "index.html"; |
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28 private final ReadWriteLock lock = new ReentrantReadWriteLock(); |
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29 private LuanState luan; |
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30 |
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31 private static final Method resetLuanMethod; |
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32 static { |
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33 try { |
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34 resetLuanMethod = LuanHandler.class.getMethod("reset_luan"); |
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35 } catch(NoSuchMethodException e) { |
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36 throw new RuntimeException(e); |
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37 } |
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38 } |
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39 |
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40 public LuanHandler(LuanState luan,String loggerRoot) { |
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41 this.luanInit = luan; |
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42 if( loggerRoot==null ) |
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43 loggerRoot = ""; |
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44 logger = LoggerFactory.getLogger(loggerRoot+LuanHandler.class.getName()); |
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45 try { |
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46 LuanTable Http = (LuanTable)PackageLuan.require(luanInit,"luan:http/Http.luan"); |
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47 Http.rawPut( "reset_luan", new LuanJavaFunction(resetLuanMethod,this) ); |
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48 } catch(LuanException e) { |
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49 throw new RuntimeException(e); |
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50 } |
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51 } |
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52 |
1000 | 53 @Override |
54 public void handle(String target,Request request,HttpServletResponse response) | |
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55 throws IOException |
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56 { |
874 | 57 //Thread.dumpStack(); |
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58 if( target.endsWith("/") ) |
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59 target += welcomeFile; |
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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.getHeader("host")+request.getRequestURI()); |
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63 lock.readLock().lock(); |
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64 try { |
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65 if( !HttpServicer.service(luan,request,response,"site:"+target+".luan") ) |
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66 return; |
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67 } catch(LuanException e) { |
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68 //e.printStackTrace(); |
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69 String err = e.getFullMessage(); |
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70 logger.error(err); |
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71 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,err); |
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72 } finally { |
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73 lock.readLock().unlock(); |
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74 thread.setName(oldName); |
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75 } |
1000 | 76 request.setHandled(true); |
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77 } |
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78 |
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79 public void setWelcomeFile(String welcomeFile) { |
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80 this.welcomeFile = welcomeFile; |
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81 } |
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82 |
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83 @Override protected void doStart() throws Exception { |
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84 // Thread.dumpStack(); |
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85 //System.out.println("qqqqqqqqqqqqqqqqqqqq doStart "+this); |
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86 setLuan(); |
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87 super.doStart(); |
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88 } |
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89 |
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90 @Override protected void doStop() throws Exception { |
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91 synchronized(luan) { |
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92 luan.close(); |
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93 } |
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94 //System.out.println("qqqqqqqqqqqqqqqqqqqq doStop "+this); |
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95 super.doStop(); |
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96 } |
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97 /* |
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98 @Override public void destroy() { |
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99 System.out.println("qqqqqqqqqqqqqqqqqqqq destroy "+this); |
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100 super.destroy(); |
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101 } |
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102 */ |
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103 |
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104 public Object call_rpc(String fnName,Object... args) throws LuanException { |
798 | 105 lock.readLock().lock(); |
106 try { | |
107 LuanFunction fn; | |
108 LuanState luan = this.luan; | |
109 synchronized(luan) { | |
110 PackageLuan.enableLoad(luan,"luan:Rpc.luan"); | |
111 LuanTable rpc = (LuanTable)PackageLuan.require(luan,"luan:Rpc.luan"); | |
112 LuanTable fns = (LuanTable)rpc.get(luan,"functions"); | |
113 fn = (LuanFunction)fns.get(luan,fnName); | |
114 if( fn == null ) | |
115 throw new LuanException( "function not found: " + fnName ); | |
116 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); | |
117 luan = (LuanState)cloner.clone(luan); | |
118 fn = (LuanFunction)cloner.get(fn); | |
119 } | |
120 return fn.call(luan,args); | |
121 } finally { | |
122 lock.readLock().unlock(); | |
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123 } |
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124 } |
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125 |
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126 public void reset_luan() { |
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127 new Thread() { |
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128 public void run() { |
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129 lock.writeLock().lock(); |
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130 try { |
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131 synchronized(luan) { |
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132 luan.close(); |
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133 setLuan(); |
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134 } |
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135 } catch(IOException e) { |
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136 logger.error("reset_luan failed",e); |
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137 } finally { |
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138 lock.writeLock().unlock(); |
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139 } |
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140 } |
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141 }.start(); |
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142 } |
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143 |
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144 private void setLuan() { |
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145 LuanCloner cloner = new LuanCloner(LuanCloner.Type.COMPLETE); |
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146 luan = (LuanState)cloner.clone(luanInit); |
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147 try { |
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148 PackageLuan.load(luan,"site:/init.luan"); |
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149 } catch(LuanException e) { |
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150 String err = e.getFullMessage(); |
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151 logger.error(err); |
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152 } |
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153 } |
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154 |
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155 public Object runLuan(String sourceText,String sourceName) throws LuanException { |
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156 LuanFunction fn = Luan.load(sourceText,sourceName); |
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157 synchronized(luan) { |
798 | 158 LuanCloner cloner = new LuanCloner(LuanCloner.Type.INCREMENTAL); |
159 LuanState luan = (LuanState)cloner.clone(this.luan); | |
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160 return fn.call(luan); |
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161 } |
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162 } |
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163 |
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164 public static void start(Server server) throws Exception { |
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165 try { |
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166 server.start(); |
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167 } catch(BindException e) { |
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168 throw new LuanException(e.toString()); |
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169 } |
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170 } |
175
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171 } |