moving Griworks to use the Butterfly webapp framework (this will allow us to make gw more extensible without excessive complexity... as a bonus we gain server side javascript support which might end up being useful)

git-svn-id: http://google-refine.googlecode.com/svn/trunk@940 7d457c2a-affb-35e4-300a-418c747d4874

main/.classpath

@@ -3,6 +3,7 @@
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="src" path="tests/server/src"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
+	<classpathentry kind="lib" path="webapp/WEB-INF/lib/butterfly-trunk-r14.jar" />
 	<classpathentry kind="lib" path="webapp/WEB-INF/lib/commons-codec-1.4.jar" sourcepath="webapp/WEB-INF/lib-src/commons-codec-1.4-sources.jar"/>
 	<classpathentry kind="lib" path="webapp/WEB-INF/lib/commons-lang-2.5.jar" sourcepath="webapp/WEB-INF/lib-src/commons-lang-2.5-sources.jar"/>
 	<classpathentry kind="lib" path="webapp/WEB-INF/lib/commons-fileupload-1.2.1.jar" sourcepath="webapp/WEB-INF/lib-src/commons-fileupload-1.2.1-sources.jar"/>

main/src/com/metaweb/gridworks/GridworksServlet.java

@@ -9,7 +9,6 @@ import java.util.TimerTask;
 
 import javax.servlet.ServletConfig;
 import javax.servlet.ServletException;
-import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
@@ -18,7 +17,9 @@ import org.slf4j.LoggerFactory;
 
 import com.metaweb.gridworks.commands.Command;
 
-public class GridworksServlet extends HttpServlet {
+import edu.mit.simile.butterfly.Butterfly;
+
+public class GridworksServlet extends Butterfly {
     
     static private final String VERSION = "1.0";
     
@@ -31,7 +32,7 @@ public class GridworksServlet extends HttpServlet {
     // timer for periodically saving projects
     static private Timer _timer;
 
-    final static Logger logger = LoggerFactory.getLogger("servlet");
+    final static Logger logger = LoggerFactory.getLogger("gridworks");
 
     // TODO: This belongs in an external config file somewhere
     private static final String[][] commandNames = {
@@ -132,6 +133,8 @@ public class GridworksServlet extends HttpServlet {
     
     @Override
     public void init() throws ServletException {
+        super.init();
+        
         logger.trace("> initialize");
         
         String data = getInitParameter("gridworks.data");
@@ -168,40 +171,41 @@ public class GridworksServlet extends HttpServlet {
 
         this.config = null;
         
-        super.destroy();
-
         logger.trace("< destroy");
+
+        super.destroy();
     }
     
-    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+    @Override
+    public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        if (request.getPathInfo().startsWith("/command")) {
             String commandName = getCommandName(request);
             Command command = commands.get(commandName);
             if (command != null) {
+                if (request.getMethod().equals("GET")) {
                     logger.trace("> GET {}", commandName);
                     command.doGet(request, response);
                     logger.trace("< GET {}", commandName);
-        } else {
+                } else if (request.getMethod().equals("POST")) {
-            response.sendError(404);
-        }
-    }
-    
-    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-        String commandName = getCommandName(request);
-        Command command = commands.get(commandName);
-        if (command != null) {
                     logger.trace("> POST {}", commandName);
                     command.doPost(request, response);
                     logger.trace("< POST {}", commandName);
+                } else {
+                    response.sendError(405);
+                }
             } else {
                 response.sendError(404);
             }
+        } else {
+            super.service(request, response);
+        }
     }
             
     protected String getCommandName(HttpServletRequest request) {
         // Remove extraneous path segments that might be there for other purposes,
         // e.g., for /export-rows/filename.ext, export-rows is the command while
         // filename.ext is only for the browser to prompt a convenient filename. 
-        String commandName = request.getPathInfo().substring(1);
+        String commandName = request.getPathInfo().substring("/command/".length());
         int slash = commandName.indexOf('/');
         return slash > 0 ? commandName.substring(0, slash) : commandName;
     }

main/webapp/WEB-INF/butterfly.properties

@@ -0,0 +1,28 @@
+#
+#  Butterfly Configuration
+#
+# NOTE: properties passed to the JVM using '-Dkey=value' from the command line
+#       override the settings in this file.
+
+# indicates the URL path where butterfly is available in the proxy URL space
+# as there is no way of knowing otherwise as this information is not 
+# transferred thru the HTTP protocol or otherwise (different story if
+# the appserver is connected thru a different protocol such as AJP)
+
+butterfly.url = / 
+
+# ---------- Miscellaneous ----------
+
+#butterfly.locale.language = en
+#butterfly.locale.country = US
+#butterfly.timeZone = GMT+09:00
+
+# ---------- Module ------
+
+butterfly.modules.path = modules
+butterfly.modules.wirings = WEB-INF/modules.properties
+
+# ---------- Clustering ----
+
+#butterfly.routing.cookie.maxage = -1
+

main/webapp/WEB-INF/modules.properties

@@ -0,0 +1,5 @@
+#
+#  Butterfly Modules Configuration
+#
+
+core = /

main/webapp/WEB-INF/velocity.properties

@@ -0,0 +1,11 @@
+runtime.log.logsystem.class=org.apache.velocity.runtime.log.SimpleLog4JLogSystem
+runtime.log.logsystem.log4j.category=Velocity
+
+parser.pool.size=5
+
+velocimacro.context.localscope=false
+velocimacro.library.autoreload=false
+velocimacro.permissions.allow.inline.local.scope=true
+
+input.encoding=UTF-8
+output.encoding=UTF-8

main/webapp/WEB-INF/web.xml

@@ -5,6 +5,19 @@
     "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
 
 <web-app>
+
+    <!--+
+        | This forces all the session cookies to default to the root path.
+        | to allow sessions to work even when butterfly is handling
+        | multiple zones.
+        | NOTE: this is jetty-specific, so other web-app servers
+        | might require different parameters.
+        +-->
+    <context-param>
+        <param-name>org.mortbay.jetty.servlet.SessionPath</param-name>
+        <param-value>/</param-value>
+    </context-param>
+     
     <servlet>
         <servlet-name>gridworks</servlet-name>
         <servlet-class>com.metaweb.gridworks.GridworksServlet</servlet-class>
@@ -12,11 +25,7 @@
 
     <servlet-mapping>
         <servlet-name>gridworks</servlet-name>
-        <url-pattern>/command/*</url-pattern>
+        <url-pattern>/*</url-pattern>
     </servlet-mapping>
         
-    <welcome-file-list>
-        <welcome-file>index.html</welcome-file>
-    </welcome-file-list>
-    
 </web-app>