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annotate src/luan/tools/WebServlet.java @ 77:4bf3d0c0b6b9

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make LuanState cloneable git-svn-id: https://luan-java.googlecode.com/svn/trunk@78 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 15 Feb 2013 09:55:17 +0000
parents 97b03fc807ad
children 9df729fa4419
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan.tools;
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2
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3 import java.io.IOException;
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4 import javax.servlet.ServletException;
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5 import javax.servlet.ServletOutputStream;
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6 import javax.servlet.http.HttpServlet;
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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 luan.LuanState;
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10 import luan.LuanException;
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11 import luan.LuanRuntimeException;
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12 import luan.LuanFunction;
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13 import luan.LuanElement;
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14 import luan.interp.LuanCompiler;
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15 import luan.lib.HttpLib;
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16 import luan.lib.BasicLib;
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17 import luan.lib.PackageLib;
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18 import luan.lib.MathLib;
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19 import luan.lib.StringLib;
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20 import luan.lib.TableLib;
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21 import luan.lib.HtmlLib;
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24 public class WebServlet extends HttpServlet {
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26 public static final String HTTP_SERVER = "http_server";
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28 protected LuanState luanState = null;
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30 protected void loadLibs(LuanState luan) throws LuanException {
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31 luan.load(BasicLib.LOADER,BasicLib.NAME);
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32 luan.load(PackageLib.LOADER,PackageLib.NAME);
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33 luan.load(MathLib.LOADER,MathLib.NAME);
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34 luan.load(StringLib.LOADER,StringLib.NAME);
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35 luan.load(TableLib.LOADER,TableLib.NAME);
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36 luan.load(HtmlLib.LOADER,HtmlLib.NAME);
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37 }
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39 protected void loadLuan(LuanState luan) throws LuanException {
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40 PackageLib.require(luan,HTTP_SERVER);
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41 Object fn = luan.global().get(HttpLib.FN_NAME);
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42 if( !(fn instanceof LuanFunction) )
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43 throw new LuanException( luan, LuanElement.JAVA, "function '"+HttpLib.FN_NAME+"' not defined" );
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44 }
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46 protected LuanState newLuanState() throws LuanException {
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47 LuanState luan = LuanCompiler.newLuanState();
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48 loadLibs(luan);
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49 loadLuan(luan);
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50 return luan;
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51 }
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53 protected LuanState getLuanState() throws LuanException {
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54 synchronized(this) {
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55 if( luanState == null )
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56 luanState = newLuanState();
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57 }
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58 return luanState.deepClone();
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59 }
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61 protected void service(HttpServletRequest request,HttpServletResponse response)
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62 throws ServletException, IOException
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63 {
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64 try {
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65 LuanState luan = getLuanState();
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66 HttpLib.service(luan,request,response);
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67 } catch(LuanException e) {
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68 throw new LuanRuntimeException(e);
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69 }
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70 }
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72 }