runtime/org.argeo.slc.server/src/main/java/org/argeo/slc/web/ajaxplorer/mvc/AjxpDriverServlet.java

   1 package org.argeo.slc.web.ajaxplorer.mvc;
   2
   3 import java.io.IOException;
   4 import java.util.Enumeration;
   5 import java.util.Map;
   6
   7 import javax.servlet.ServletConfig;
   8 import javax.servlet.ServletException;
   9 import javax.servlet.http.HttpServletRequest;
  10 import javax.servlet.http.HttpServletResponse;
  11
  12 import org.apache.commons.logging.Log;
  13 import org.apache.commons.logging.LogFactory;
  14 import org.argeo.slc.web.ajaxplorer.AjxpAnswer;
  15 import org.argeo.slc.web.ajaxplorer.AjxpDriver;
  16 import org.springframework.beans.BeanWrapper;
  17 import org.springframework.beans.BeanWrapperImpl;
  18 import org.springframework.beans.BeansException;
  19 import org.springframework.web.context.WebApplicationContext;
  20 import org.springframework.web.context.support.WebApplicationContextUtils;
  21 import org.springframework.web.servlet.HttpServletBean;
  22
  23 public class AjxpDriverServlet extends HttpServletBean {
  24         static final long serialVersionUID = 1l;
  25
  26         protected final Log log = LogFactory.getLog(getClass());
  27         private String driverBean;
  28         private AjxpDriver driver;
  29
  30         @Override
  31         public void init(ServletConfig sc) throws ServletException {
  32                 super.init(sc);
  33                 WebApplicationContext context = WebApplicationContextUtils
  34                                 .getRequiredWebApplicationContext(sc.getServletContext());
  35                 driverBean = sc.getInitParameter("driverBean");
  36                 if (driverBean == null) {
  37                         throw new ServletException(
  38                                         "No driver found, please set the driverBean property");
  39                 }
  40
  41                 logger.info("Loading driver " + driverBean);
  42                 driver = (AjxpDriver) context.getBean(driverBean);
  43
  44                 // overrideBeanProperties(sc);
  45         }
  46
  47         @Override
  48         protected void doGet(HttpServletRequest req, HttpServletResponse resp)
  49                         throws ServletException, IOException {
  50                 processRequest("GET", req, resp);
  51         }
  52
  53         @Override
  54         protected void doPost(HttpServletRequest req, HttpServletResponse resp)
  55                         throws ServletException, IOException {
  56                 processRequest("POST", req, resp);
  57         }
  58
  59         protected void processRequest(String method, HttpServletRequest req,
  60                         HttpServletResponse resp) throws ServletException, IOException {
  61                 long id = System.currentTimeMillis();
  62                 try {
  63                         if (log.isDebugEnabled())
  64                                 logRequest(id, method, req);
  65
  66                         AjxpAnswer answer = driver.executeAction(req);
  67                         answer.updateResponse(resp);
  68
  69                         if (log.isDebugEnabled())
  70                                 log.debug(id + " " + method + " completed");
  71                 } catch (Exception e) {
  72                         log.error(id + " Cannot process request.", e);
  73                         throw new ServletException("Cannot process request " + id, e);
  74                 }
  75
  76         }
  77
  78         public void setDriverBean(String driverName) {
  79                 this.driverBean = driverName;
  80         }
  81
  82         protected void logRequest(long id, String method, HttpServletRequest req) {
  83                 if (log.isDebugEnabled()) {
  84                         StringBuffer buf = new StringBuffer(id + " Received " + method
  85                                         + ": ");
  86                         buf.append('{');
  87                         Map<String, String[]> params = req.getParameterMap();
  88                         int count1 = 0;
  89                         for (Map.Entry<String, String[]> entry : params.entrySet()) {
  90                                 if (count1 != 0)
  91                                         buf.append(", ");
  92                                 buf.append(entry.getKey()).append("={");
  93                                 int count2 = 0;
  94                                 for (String value : entry.getValue()) {
  95                                         if (count2 != 0)
  96                                                 buf.append(',');
  97                                         buf.append(value);
  98                                         count2++;
  99                                 }
 100                                 buf.append('}');
 101                                 count1++;
 102                         }
 103                         buf.append('}');
 104                         log.debug(buf.toString());
 105                 }
 106         }
 107
 108         protected void overrideBeanProperties(ServletConfig sc)
 109                         throws ServletException {
 110                 BeanWrapper wrapper = new BeanWrapperImpl(driver);
 111                 Enumeration<String> en = sc.getInitParameterNames();
 112                 while (en.hasMoreElements()) {
 113                         String name = en.nextElement();
 114                         if (name.indexOf(driverBean + '.') == 0
 115                                         && name.length() > (driverBean.length() + 1)) {
 116                                 String propertyName = name.substring(driverBean.length() + 1);
 117                                 String value = sc.getInitParameter(name);
 118                                 if (value != null) {
 119                                         try {
 120                                                 wrapper.setPropertyValue(propertyName, value);
 121                                         } catch (BeansException e) {
 122                                                 throw new ServletException("Cannot set property "
 123                                                                 + propertyName + " of bean " + driverBean, e);
 124                                         }
 125                                 }
 126                         }
 127                 }
 128         }
 129 }