Rough in basic structure.

+build

+<?xml version="1.0"?>
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you 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.
+-->
+
+<project name="comet-messenger" default="jar" basedir=".">
+    <first id="possible.ofbiz.home.common.xml">
+        <resources>
+            <fileset dir="..">
+                <include name="ofbiz/common.xml"/>
+            </fileset>
+            <fileset dir="/">
+                <include name="srv/ofbiz-upstream/common.xml"/>
+                <include name="opt/ofbiz-upstream/common.xml"/>
+                <include name="job/ofbiz-upstream/common.xml"/>
+            </fileset>
+        </resources>
+    </first>
+    <dirname property="possible.ofbiz.home.dir" file="${toString:possible.ofbiz.home.common.xml}"/>
+    <property name="ofbiz.home.dir" value="${possible.ofbiz.home.dir}"/>
+    <import file="${ofbiz.home.dir}/common.xml"/>
+
+    <!-- ================================================================== -->
+    <!-- Initialization of all property settings                            -->
+    <!-- ================================================================== -->
+
+    <property name="desc" value="comet-messenger"/>
+    <property name="name" value="comet-messenger"/>
+
+    <path id="local.class.path">
+        <!--<fileset dir="${lib.dir}" includes="*.jar"/>-->
+        <fileset dir="${ofbiz.home.dir}/framework/webapp/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/webapp/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/base/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/base/lib/commons" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/base/lib/scripting" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/base/lib/j2eespecs" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/base/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/entity/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/entity/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/security/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/service/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/service/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/minilang/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/common/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/webapp/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/applications/party/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/applications/product/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/applications/marketing/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/applications/order/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/applications/accounting/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/applications/securityext/build/lib" includes="*.jar"/>
+
+        <fileset dir="${ofbiz.home.dir}/framework/start/build/lib" includes="*.jar"/>
+        <fileset dir="${ofbiz.home.dir}/framework/catalina/lib" includes="*.jar"/>
+    </path>
+</project>

+
+<entitymodel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="http://ofbiz.apache.org/dtds/entitymodel.xsd">
+  <!-- ========================================================= -->
+  <!-- ======================== Defaults ======================= -->
+  <!-- ========================================================= -->
+    <title>Entity of an Open For Business Project Component</title>
+    <description>None</description>
+    <copyright>Copyright 2001-2009 The Apache Software Foundation</copyright>
+    <author>None</author>
+    <version>1.0</version>
+
+</entitymodel>

+<?xml version="1.0" encoding="UTF-8"?>
+<ofbiz-component name="comet-messenger"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="http://www.ofbiz.org/dtds/ofbiz-component.xsd">
+    <resource-loader name="main" type="component"/>
+    <classpath type="dir" location="config"/>
+    <classpath type="jar" location="lib/*"/>
+    <classpath type="jar" location="build/lib/*"/>
+
+</ofbiz-component>
+

+<?xml version="1.0" encoding="UTF-8"?>
+<services xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="http://ofbiz.apache.org/dtds/services.xsd">
+    <description>DriverUp</description>
+    <vendor>DriverUp</vendor>
+    <version>1.0</version>
+
+</services>

+package com.brainfood.ofbiz;
+
+import org.apache.catalina.comet.CometEvent;
+import org.apache.catalina.comet.CometProcessor;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.ServletException;
+import java.io.IOException;
+
+public class CometMessengerServlet extends HttpServlet implements CometProcessor {
+
+    private static final Integer TIMEOUT = 60 * 1000;
+
+    @Override
+    public void destroy() {
+    }
+
+    @Override
+    public void init() throws ServletException {
+    }
+
+    public void event(final CometEvent event) throws IOException, ServletException {
+        HttpServletRequest request = event.getHttpServletRequest();
+        HttpServletResponse response = event.getHttpServletResponse();
+        if (event.getEventType() == CometEvent.EventType.BEGIN) {
+            request.setAttribute("org.apache.tomcat.comet.timeout", TIMEOUT);
+            log("Begin for session: " + request.getSession(true).getId());
+        } else if (event.getEventType() == CometEvent.EventType.ERROR) {
+            log("Error for session: " + request.getSession(true).getId());
+            event.close();
+        } else if (event.getEventType() == CometEvent.EventType.END) {
+            log("End for session: " + request.getSession(true).getId());
+            event.close();
+        } else if (event.getEventType() == CometEvent.EventType.READ) {
+            throw new UnsupportedOperationException("This servlet does not accept data");
+        }
+    }
+}