1 files changed, 654 insertions, 0 deletions
diff --git a/trunk/infrastructure/net.appjet.oui/execution.scala b/trunk/infrastructure/net.appjet.oui/execution.scala
new file mode 100644
index 0000000..63749b1
--- /dev/null
+++ b/trunk/infrastructure/net.appjet.oui/execution.scala
@@ -0,0 +1,654 @@
+/**
+ * Copyright 2009 Google Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.appjet.oui;
+
+import java.net.URLDecoder;
+import java.util.Enumeration;
+import java.util.concurrent.atomic.AtomicLong;
+
+import javax.servlet.http.{HttpServletRequest, HttpServletResponse, HttpServlet};
+
+import scala.collection.mutable.{ListBuffer, LinkedHashSet, HashMap, ArrayBuffer};
+import scala.collection.immutable.Map;
+import scala.collection.jcl.Conversions;
+
+import org.mozilla.javascript.{Scriptable, Context, Function, ScriptableObject, JavaScriptException};
+import org.mortbay.jetty.RetryRequest;
+
+import net.appjet.bodylock.{BodyLock, Executable, JSRuntimeException, JSCompileException};
+import net.appjet.common.util.{HttpServletRequestFactory, BetterFile};
+
+import Util.enumerationToRichEnumeration;
+
+class RequestWrapper(val req: HttpServletRequest) {
+  req.setCharacterEncoding("UTF-8");
+//   private lazy val parameterNames =
+//     (for (i <- Conversions.convertSet(req.getParameterMap.keySet().asInstanceOf[java.util.Set[String]])) yield i).toList.toArray
+//   private def parameterValues(k: String) = req.getParameterValues(k);
+  def headerCapitalize(s: String) =
+    s.split("-").map(
+      s =>
+        if (s == null || s.length < 1) s
+        else s.substring(0, 1).toUpperCase()+s.substring(1).toLowerCase()
+    ).mkString("-");
+  def isFake = false;
+  lazy val path = req.getRequestURI();
+  lazy val host = {
+    val hostFromHeader = req.getHeader("Host");
+    if ((hostFromHeader ne null) && hostFromHeader.indexOf(':') >= 0) {
+      // fix the port, which may be wrong in Host header (e.g. IE 6)
+      hostFromHeader.substring(0, hostFromHeader.indexOf(':')) + ":" +
+        req.getLocalPort;
+    }
+    else {
+      hostFromHeader;
+    }
+  }
+  lazy val query = req.getQueryString();
+  lazy val method = req.getMethod();
+  lazy val scheme = req.getScheme();
+  lazy val clientAddr = req.getRemoteAddr();
+  
+  def decodeWwwFormUrlencoded(content: => String): Map[String, Array[String]] = {
+    val map = new HashMap[String, ArrayBuffer[String]];
+    if (content != null) {
+      for (pair <- content.split("&").map(_.split("=", 2))) {
+        val key = URLDecoder.decode(pair(0), "UTF-8");
+        val list = map.getOrElseUpdate(key, new ArrayBuffer[String]);
+        if (pair.length > 1) {
+          list += URLDecoder.decode(pair(1), "UTF-8");
+        }
+      }      
+    }
+    Map((for ((k, v) <- map) yield (k, v.toArray)).toSeq: _*);    
+  }
+  
+  def postParams = decodeWwwFormUrlencoded(content.asInstanceOf[String]);
+  def getParams = decodeWwwFormUrlencoded(query);
+
+  lazy val params_i = {
+    if (contentType != null && contentType.startsWith("application/x-www-form-urlencoded")) {
+      if (req.getAttribute("ajcache_parameters") == null) {
+        req.setAttribute("ajcache_parameters", 
+          Map((for (k <- (postParams.keys ++ getParams.keys).toList) 
+                 yield (k, postParams.getOrElse(k, Array[String]()) ++ 
+                           getParams.getOrElse(k, Array[String]()))).toSeq: _*));
+      }
+      req.getAttribute("ajcache_parameters").asInstanceOf[Map[String, Array[String]]];
+    } else {
+      Conversions.convertMap(req.getParameterMap().asInstanceOf[java.util.Map[String, Array[String]]]);
+    }
+  }
+  
+  def params(globalScope: Scriptable) = new ScriptableFromMapOfStringArrays(
+    globalScope,
+    params_i.keys.toList,
+    params_i.get(_),
+    false);
+  def headers(globalScope: Scriptable) = new ScriptableFromMapOfStringArrays(
+    globalScope, 
+    req.getHeaderNames().asInstanceOf[Enumeration[String]]
+      .map(headerCapitalize).toList,
+    h => h match {
+      case "Host" => Some(Array(host));
+      case hh => Some(Util.enumerationToArray(req.getHeaders(headerCapitalize(hh)).asInstanceOf[Enumeration[String]])) },
+    true);
+  lazy val protocol = req.getProtocol();
+  lazy val contentType = req.getHeader("Content-Type");
+  lazy val postParamsInBody = contentType != null && contentType.startsWith("application/x-www-form-urlencoded");
+  lazy val content = 
+    if ((contentType != null && contentType.startsWith("text/")) || postParamsInBody) {
+      val reader = req.getReader();
+      if (reader != null)
+        BetterFile.getReaderString(req.getReader());
+      else
+        null;
+    } else {
+      val stream = req.getInputStream();
+      if (stream != null)
+        BetterFile.getStreamBytes(req.getInputStream());        
+      else
+        null;
+    }
+  def files(globalScope: Scriptable): Object = {
+//    if (! req.isInstanceOf[com.oreilly.servlet.MultipartWrapper]) {
+      new ScriptableAdapter();
+//    } else {
+//      val r = req.asInstanceOf[com.oreilly.servlet.MultipartWrapper];
+//      val fileScriptables = new HashMap[String, Scriptable]();
+//      val fileBytes = new HashMap[String, Array[byte]]();
+//      new ScriptableFromMapOfScriptableArrays(globalScope,
+//        r.getFileNames().asInstanceOf[Enumeration[String]].toList,
+//        name => {
+//          if (r.getFile(name) == null) 
+//            None 
+//          else 
+//            Some(Array(fileScriptables.getOrElseUpdate(name, 
+//              new ScriptableFromMapOfArrays[Object](globalScope,
+//                Set("contentType", "filesystemName", "bytes").toSeq,
+//                _ match {
+//                  case "contentType" => Some(Array(r.getContentType(name)));
+//                  case "filesystemName" =>
+//                    Some(Array(r.getFilesystemName(name)));
+//                  case "bytes" =>
+//                    Some(Array(Context.javaToJS(fileBytes.getOrElseUpdate(name,
+//                      BetterFile.getFileBytes(r.getFile(name))), globalScope)));
+//                  case _ => None;
+//                },
+//                true))))
+//        },
+//        true);
+//    }
+  }
+}
+
+class ResponseWrapper(val res: HttpServletResponse) {
+  private lazy val outputStrings = new ListBuffer[String];
+  private lazy val outputBytes = new ListBuffer[Array[byte]];
+  private var statusCode = 200;
+  private var contentType = "text/html";
+  private var redirect: String = null;
+  private lazy val headers = new LinkedHashSet[(String, String, HttpServletResponse => Unit)] {
+    def removeAll(k: String) {
+      this.foreach(x => if (x._1 == k) remove(x));
+    }
+  }
+
+  private[oui] def overwriteOutputWithError(code: Int, errorStr: String) {
+    statusCode = code;
+    outputStrings.clear();
+    outputStrings += errorStr;
+    outputBytes.clear();
+    headers.clear();
+    Util.noCacheHeaders.foreach(x => headers += (x._1, x._2, res => res.setHeader(x._1, x._2)));
+    redirect = null;
+    contentType = "text/html; charset=utf-8";
+  }
+
+  def reset() {
+    outputStrings.clear();
+    outputBytes.clear();
+    redirect = null;
+    headers.clear();
+    Util.noCacheHeaders.foreach(x => headers += (x._1, x._2, res => res.setHeader(x._1, x._2)));
+    statusCode = 200;
+    contentType = "text/html; charset=utf-8";
+  }
+  def error(code: Int, errorStr: String) {
+    overwriteOutputWithError(code, errorStr);
+    stop();
+  }
+  def stop() {
+    throw AppGeneratedStopException;
+  }
+
+  def write(s: String) {
+    outputStrings += s;
+  }
+  def getOutput() = outputStrings.mkString("");
+  def writeBytes(bytes: String) {
+    val a = new Array[byte](bytes.length());
+    bytes.getBytes(0, bytes.length(), a, 0);
+    outputBytes += a;
+  }
+  def writeBytes(bytes: Array[Byte]) {
+    outputBytes += bytes;
+  }
+  def getOutputBytes() = outputBytes.flatMap(x => x).toArray
+  def setContentType(s: String) {
+    contentType = s;
+  }
+  def getCharacterEncoding() = {
+    res.setContentType(contentType);
+    res.getCharacterEncoding();
+  }
+  def setStatusCode(sc: Int) {
+    statusCode = sc;
+  }
+  def getStatusCode() = statusCode;
+  def redirect(loc: String) {
+    statusCode = 302;
+    redirect = loc;
+    stop();
+  }
+  def setHeader(name: String, value: String) {
+    headers += ((name, value, res => res.setHeader(name, value)));
+  }
+  def addHeader(name: String, value: String) {
+    headers += ((name, value, res => res.addHeader(name, value)));
+  }
+  def getHeader(name: String) = {
+    headers.filter(_._1 == name).map(_._2).toSeq.toArray;
+  }
+  def removeHeader(name: String) {
+    headers.removeAll(name);
+  }
+
+  var gzipOutput = false;
+  def setGzip(gzip: Boolean) {
+    gzipOutput = gzip;
+  }
+
+  def print() {
+    if (redirect != null && statusCode == 302) {
+      headers.foreach(_._3(res));
+      res.sendRedirect(redirect);
+    } else {
+      res.setStatus(statusCode);
+      res.setContentType(contentType);
+      headers.foreach(_._3(res));
+      if (gzipOutput) res.setHeader("Content-Encoding", "gzip");
+      if (outputStrings.length > 0) {
+        var bytes: Seq[Array[Byte]] = outputStrings.map(_.getBytes(res.getCharacterEncoding()));
+        if (gzipOutput) bytes = List(Util.gzip(Array.concat(bytes:_*)));
+        res.setContentLength((bytes :\ 0) {_.length + _});
+        bytes.foreach(res.getOutputStream.write(_));
+      } else if (outputBytes.length > 0) {
+        var bytes: Seq[Array[Byte]] = outputBytes;
+        if (gzipOutput) bytes = List(Util.gzip(Array.concat(bytes:_*)));
+        res.setContentLength((bytes :\ 0) {_.length + _});
+        bytes.foreach(res.getOutputStream.write(_));
+      }
+    }
+  }
+}
+
+class ScriptableAdapter extends Scriptable {
+  private def unsupported() = throw UnsupportedOperationException;
+  def delete(index: Int) { unsupported(); }
+  def delete(name: String) { unsupported(); }
+  def get(index: Int, start: Scriptable): Object = Context.getUndefinedValue();
+  def get(name: String, start: Scriptable): Object = Context.getUndefinedValue();
+  def getClassName() = getClass.getName();
+  def getDefaultValue(hint: Class[_]) = "[ScriptableAdapter]";
+  def getIds(): Array[Object] = Array[Object]();
+  def getParentScope: Scriptable = null;
+  def getPrototype: Scriptable = null;
+  def has(index: Int, start: Scriptable): Boolean = false;
+  def has(name: String, start: Scriptable): Boolean = false;
+  def hasInstance(instance: Scriptable): Boolean = false;
+  def put(index: Int, start: Scriptable, value: Object) { unsupported(); }
+  def put(name: String, start: Scriptable, value: Object) { unsupported(); }
+  def setParentScope(parent: Scriptable) { unsupported(); }
+  def setPrototype(prototype: Scriptable) { unsupported(); }
+}
+
+class ScriptableFromMapOfStringArrays(globalScope: Scriptable,
+  keys: Seq[String], values: String => Option[Array[String]],
+  zeroMeansNone: Boolean) extends ScriptableFromMapOfArrays[String](
+    globalScope, keys, values, zeroMeansNone);
+
+class ScriptableFromMapOfScriptableArrays(globalScope: Scriptable,
+  keys: Seq[String], values: String => Option[Array[Scriptable]],
+  zeroMeansNone: Boolean) extends ScriptableFromMapOfArrays[Scriptable](
+    globalScope, keys, values, zeroMeansNone);
+
+
+class ScriptableFromMapOfArrays[V <: Object](globalScope: Scriptable,
+                                keys: Seq[String], values: String => Option[Array[V]], 
+                                zeroMeansNone: Boolean) extends ScriptableAdapter {
+  override def get(n: String, start: Scriptable): Object = {
+    val v = values(n);
+    if (v.isEmpty || (zeroMeansNone && v.get.length == 0)) {
+      Context.getUndefinedValue();
+    } else if (v.get.length == 1) {
+      v.get.apply(0);
+    } else {
+      Context.getCurrentContext().newArray(globalScope, v.get.map(x => x.asInstanceOf[Object]));
+    }
+  }
+  override def getIds(): Array[Object] = keys.toArray[Object];
+  override def getPrototype = ScriptableObject.getObjectPrototype(globalScope);
+  override def has(n: String, start: Scriptable): Boolean = ! (values(n).isEmpty || (zeroMeansNone && values(n).get.length == 0));
+}
+
+object AppGeneratedStopException extends JSRuntimeException("User-generated stop.", null);
+class NoHandlerException(msg: String) extends JSRuntimeException(msg, null);
+object UnsupportedOperationException extends JSRuntimeException("Unsupported operation.", null);
+
+object ExecutionContextUtils {
+  val uniqueIds = new AtomicLong(0);
+
+  val ecVar = new NoninheritedDynamicVariable[ExecutionContext](null);
+  def withContext[E](ec: ExecutionContext)(block: => E): E = {
+    ecVar.withValue(ec)(block);
+  }
+  
+  def currentContext = ecVar.value;
+}
+
+case class ExecutionContext(
+  val request: RequestWrapper,
+  val response: ResponseWrapper,
+  var runner: ScopeReuseManager.Runner) {
+  val asyncs = new ListBuffer[Function];
+  lazy val attributes = new HashMap[String, Any];
+  var completed = false;
+  lazy val executionId = ""+ExecutionContextUtils.uniqueIds.incrementAndGet();
+  var result: AnyRef = null;
+}
+
+object CometSupport {
+  trait CometHandler {
+    def handleCometRequest(req: HttpServletRequest, res: HttpServletResponse);
+  }
+  var cometHandler: CometHandler = null;
+}
+
+class OuiServlet extends HttpServlet {
+  override def doGet(req: HttpServletRequest, res: HttpServletResponse) {
+    execute(req, res);
+  }
+
+  override def doPost(req: HttpServletRequest, res: HttpServletResponse) {
+    execute(req, res);
+  }
+
+  override def doHead(req: HttpServletRequest, res: HttpServletResponse) {
+    execute(req, res);
+  }
+
+  override def doPut(req: HttpServletRequest, res: HttpServletResponse) {
+    execute(req, res);
+  }
+
+  override def doDelete(req: HttpServletRequest, res: HttpServletResponse) {
+    execute(req, res);
+  }
+
+  override def doTrace(req: HttpServletRequest, res: HttpServletResponse) {
+    execute(req, res);
+  }
+
+  override def doOptions(req: HttpServletRequest, res: HttpServletResponse) {
+    execute(req, res);
+  }
+
+  def execute(req: HttpServletRequest, res: HttpServletResponse) {
+    if (req.getProtocol() == "HTTP/1.1" && req.getHeader("Host") == null) {
+      res.sendError(HttpServletResponse.SC_BAD_REQUEST, "Invalid HTTP/1.1 request: No \"Host\" header found.");
+    } else if (config.transportPrefix != null && req.getRequestURI().startsWith(config.transportPrefix)) {
+      val runner = ScopeReuseManager.getRunner;
+      val ec = new ExecutionContext(new RequestWrapper(req), new ResponseWrapper(res), runner);
+      req.setAttribute("executionContext", ec);
+      req.setAttribute("isServerPushConnection", true);
+      try {
+        CometSupport.cometHandler.handleCometRequest(req, res);
+      } catch {
+        case e: RetryRequest => {
+          ec.runner = null;
+          ScopeReuseManager.freeRunner(runner);
+          throw e;
+        }
+        case _ => {};
+      }
+      try {
+        ec.response.print();
+        execution.onprint(ec, BodyLock.subScope(runner.mainScope));
+      } finally {
+        ec.runner = null;
+        ScopeReuseManager.freeRunner(runner);
+      }
+    } else {
+      execution.execute(req, res);
+    }
+  }
+}
+
+object execution {
+  // maybe find a better place for this?
+  { // initialize ajstdlib
+    val c = Class.forName("net.appjet.ajstdlib.ajstdlib$");
+    val m = c.getDeclaredMethod("init");
+    val o = c.getDeclaredField("MODULE$");
+    m.invoke(o.get(null));
+  }
+
+  val requestLib = new FixedDiskLibrary(new SpecialJarOrNotFile(config.ajstdlibHome, "onrequest.js"));
+  val errorLib = new FixedDiskLibrary(new SpecialJarOrNotFile(config.ajstdlibHome, "onerror.js"));
+  val printLib = new FixedDiskLibrary(new SpecialJarOrNotFile(config.ajstdlibHome, "onprint.js"));
+  val syntaxErrorLib = new FixedDiskLibrary(new SpecialJarOrNotFile(config.ajstdlibHome, "syntaxerror.js"));
+  val onSyntaxErrorLib = new FixedDiskLibrary(new SpecialJarOrNotFile(config.ajstdlibHome, "onsyntaxerror.js"));
+  val sarsLib = new FixedDiskLibrary(new SpecialJarOrNotFile(config.ajstdlibHome, "onsars.js"));
+  val scheduledTaskLib = new FixedDiskLibrary(new SpecialJarOrNotFile(config.ajstdlibHome, "onscheduledtask.js"));
+  def requestExecutable = requestLib.executable;
+  def errorExecutable = errorLib.executable;
+  def printExecutable = printLib.executable;
+  def syntaxErrorExecutable = syntaxErrorLib.executable;
+  def onSyntaxErrorExecutable = onSyntaxErrorLib.executable;
+  def sarsExecutable = sarsLib.executable;
+  def scheduledTaskExecutable = scheduledTaskLib.executable;
+
+  def postSuccessfulRun(ec: ExecutionContext) {
+    try {
+      for (f <- ec.asyncs) {
+        BodyLock.runInContext({ cx =>
+          f.call(cx, f.getParentScope(), ec.runner.mainScope, Array[Object]());
+        });
+      }
+    } catch {
+      case e => exceptionlog(e);
+    }
+  }
+
+  def onprint(ec: ExecutionContext, scope: Scriptable) { 
+    try {
+//      ec.runner.globalScope.put("_appjetcontext_", ec.runner.globalScope, ec);
+      printExecutable.execute(scope);
+    } catch {
+      case e => { exceptionlog(e); } // shrug. this was best-effort anyway.
+    }
+  }
+
+  def execute(req: HttpServletRequest, res: HttpServletResponse) {
+    val runner = try {
+      ScopeReuseManager.getRunner;
+    } catch {
+      case e: JSCompileException => {
+        val r = ScopeReuseManager.getEmpty { r =>
+          syntaxErrorExecutable.execute(r.globalScope)
+        }
+        val ec = ExecutionContext(new RequestWrapper(req), new ResponseWrapper(res), r);
+//        r.globalScope.put("_appjetcontext_", r.globalScope, ec);
+        ExecutionContextUtils.withContext(ec) {
+          ec.attributes("error") = e;
+          ec.result = onSyntaxErrorExecutable.execute(r.globalScope);
+          ec.response.print();
+        }
+        return;
+      }
+    }
+    val ec = ExecutionContext(new RequestWrapper(req), new ResponseWrapper(res), runner);
+    val startTime = executionlatencies.time;
+    execute(ec, 
+            (sc: Int, msg: String) => { 
+              ec.response.overwriteOutputWithError(sc, msg); 
+            },
+            () => { executionlatencies.log(Map(
+              "time" -> (executionlatencies.time - startTime)));
+              ec.response.print() },
+            () => { ScopeReuseManager.freeRunner(runner) },
+            None);
+  }
+
+  def errorToHTML(e: Throwable) = {
+    val trace = new java.io.StringWriter();
+    e.printStackTrace(new java.io.PrintWriter(trace));
+    trace.toString().split("\n").mkString("<br>\n");
+  }
+  def execute(ec: ExecutionContext, 
+              errorHandler: (Int, String) => Unit, 
+              doneWritingHandler: () => Unit, 
+              completedHandler: () => Unit,
+              customExecutable: Option[Executable]) =
+    ExecutionContextUtils.withContext(ec) {
+//      ec.runner.globalScope.put("_appjetcontext_", ec.runner.globalScope, ec);
+      val runScope = BodyLock.subScope(ec.runner.mainScope);
+      try {
+        ec.result = customExecutable.getOrElse(requestExecutable).execute(runScope);
+        ec.completed = true;
+      } catch {
+        case AppGeneratedStopException => { ec.completed = true; }
+        case e: NoHandlerException => errorHandler(500, "No request handler is defined.");
+        case e: RetryRequest => { completedHandler(); throw e; }
+        case e => { 
+          ec.attributes("error") = e; 
+          try {
+            ec.result = errorExecutable.execute(runScope);
+          } catch {
+            case AppGeneratedStopException => { }
+            case nhe: NoHandlerException => { 
+              exceptionlog(e);
+              e.printStackTrace();
+              errorHandler(500, "An error occurred and no error handler is defined.");
+            }
+            case e2 => {
+              exceptionlog(e); exceptionlog(e2); 
+              val etext = e2 match {
+                case jse: JavaScriptException => { (jse.getValue() match {
+                  case ne: org.mozilla.javascript.IdScriptableObject => ne.get("message", ne)
+                  case e => e.getClass.getName
+                }) + "<br>\n" + errorToHTML(jse); }
+                case _ => errorToHTML(e2);
+              }
+              errorHandler(
+                500, 
+                "You like apples? An error occurred in the error handler while handling an error. How do you like <i>them</i> apples?<br>\n"+
+                etext+"<br>\nCaused by:<br>\n"+errorToHTML(e));
+            }
+          }
+        }
+      }
+      onprint(ec, runScope);
+      doneWritingHandler();
+      if (ec.completed && ! ec.asyncs.isEmpty) {
+        main.server.getThreadPool().dispatch(new Runnable {
+          def run() {
+            postSuccessfulRun(ec);
+            completedHandler();
+          }
+        });
+      } else {
+        completedHandler();
+      }
+    }
+
+  def runOutOfBandSimply(executable: Executable,
+                         props: Option[Map[String, Any]]) = {
+    // there must be a context already.
+    val currentContext = ExecutionContextUtils.currentContext;
+    val request = 
+      if (currentContext != null) {
+        currentContext.request;
+      } else {
+        val fakeHeaders = scala.collection.jcl.Conversions.convertMap(
+          new java.util.HashMap[String, String]); 
+        fakeHeaders("Host") = "unknown.local";
+        new RequestWrapper(HttpServletRequestFactory.createRequest(
+            "/", fakeHeaders.underlying, "GET", null)) { 
+          override val isFake = true;
+        }
+      }
+    val response =
+      if (currentContext != null && currentContext.response != null) {
+        currentContext.response;
+      } else {
+        new ResponseWrapper(null);
+      }
+    val runner = 
+      if (currentContext != null) {
+        (false, currentContext.runner);
+      } else {
+        (true, ScopeReuseManager.getRunner);
+      }
+    val ec = new ExecutionContext(request, response, runner._2)
+    if (props.isDefined) {
+      for ((k, v) <- props.get) {
+        ec.attributes(k) = v;
+      }
+    }
+    try {
+      ExecutionContextUtils.withContext(ec) {
+        executable.execute(BodyLock.subScope(ec.runner.mainScope));
+      }      
+    } finally {
+      if (runner._1) {
+        ScopeReuseManager.freeRunner(runner._2);
+      }
+    }
+  }
+
+  def runOutOfBand(executable: Executable, name: String, 
+                   props: Option[Map[String, Any]], 
+                   onFailure: Any => Unit) = {
+    var ec: ExecutionContext = null;
+    try {
+      val runner = ScopeReuseManager.getRunner;
+      val currentContext = ExecutionContextUtils.currentContext;
+      val request = 
+        if (currentContext != null) {
+          currentContext.request;
+        } else {
+          val fakeHeaders = scala.collection.jcl.Conversions.convertMap(
+            new java.util.HashMap[String, String]); 
+          fakeHeaders("Host") = "unknown.local";
+          new RequestWrapper(HttpServletRequestFactory.createRequest(
+              "/", fakeHeaders.underlying, "GET", null)) { 
+            override val isFake = true;
+          }
+        }
+      val response =
+        if (currentContext != null && currentContext.response != null) {
+          new ResponseWrapper(currentContext.response.res);
+        } else {
+          new ResponseWrapper(null);
+        }
+      ec = new ExecutionContext(request, response, runner);
+      if (props.isDefined)
+        for ((k, v) <- props.get) {
+          ec.attributes(k) = v;
+        }
+      execution.execute(ec, 
+                        (sc: Int, msg: String) => { println(name+" execution failed with error: "+sc+"\n"+msg); onFailure((sc, msg)); },
+                        () => { },
+                        () => { ScopeReuseManager.freeRunner(runner) },
+                        Some(executable));
+      if (ec.response != null && ec.response.getStatusCode() != 200) {
+        println(name+" execution failed with non-200 response: "+ec.response.getStatusCode());
+        onFailure((ec.response.getStatusCode, ec.response.getOutput()));
+      }
+      ec;
+    } catch {
+      case e: JSCompileException => {
+        val r = ScopeReuseManager.getEmpty { r =>
+          execution.syntaxErrorExecutable.execute(r.globalScope);
+        }
+        val ec = ExecutionContext(null, null, r);
+//        r.globalScope.put("_appjetcontext_", r.globalScope, ec);
+        ExecutionContextUtils.withContext(ec) {
+          ec.attributes("error") = e;
+          ec.result = execution.onSyntaxErrorExecutable.execute(r.globalScope);
+          onFailure(e);
+        }
+        ec;
+      }
+      case e => { 
+        println(name+" execution failed with error."); onFailure(e); ec;
+      }
+    }
+  }
+}