[OLINGO-266] initial reference scenario servlet

lib/ref/pom.xml

@@ -24,7 +24,7 @@
   <modelVersion>4.0.0</modelVersion>
 
   <artifactId>olingo-ref</artifactId>
-  <packaging>jar</packaging>
+  <packaging>war</packaging>
   <name>${project.artifactId}</name>
 
   <parent>
@@ -35,6 +35,13 @@
   </parent>
 
   <dependencies>
+    <dependency>
+      <groupId>javax.servlet</groupId>
+      <artifactId>servlet-api</artifactId>
+      <version>2.5</version>
+      <scope>provided</scope>
+    </dependency>
+
     <dependency>
       <groupId>org.apache.olingo</groupId>
       <artifactId>olingo-server-api</artifactId>
@@ -55,7 +62,6 @@
       <groupId>org.mockito</groupId>
       <artifactId>mockito-all</artifactId>
     </dependency>
-
   </dependencies>
 
 </project>

lib/ref/src/main/java/org/apache/olingo/ref/ReferenceServlet.java

@@ -0,0 +1,42 @@
+/*
+ * 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.
+ */
+package org.apache.olingo.ref;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.olingo.server.api.ODataServer;
+
+public class ReferenceServlet extends HttpServlet {
+
+  private static final long serialVersionUID = 1L;
+
+  @Override
+  protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+    
+    ODataServer server = ODataServer.newInstance();
+    server.handle(req, resp);
+    
+  }
+
+}

lib/ref/src/main/resources/simplelogger.properties

@@ -0,0 +1,20 @@
+#
+# 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.
+#
+org.slf4j.simpleLogger.defaultLogLevel=debug
+org.slf4j.simpleLogger.logFile=System.out

lib/ref/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  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.
+-->
+<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+	id="WebApp_ID" version="2.5">
+
+	<display-name>Apache Olingo OData 4.0 Reference Scenario Service</display-name>
+
+	<welcome-file-list>
+		<welcome-file>index.html</welcome-file>
+	</welcome-file-list>
+	
+	<servlet>
+		<servlet-name>ODataServlet</servlet-name>
+		<servlet-class>org.apache.olingo.ref.ReferenceServlet</servlet-class>
+		<load-on-startup>1</load-on-startup>
+	</servlet>
+   
+	<servlet-mapping>
+		<servlet-name>ODataServlet</servlet-name>
+		<url-pattern>/odata.svc/*</url-pattern>
+	</servlet-mapping>
+
+</web-app>

lib/ref/src/main/webapp/index.html

@@ -0,0 +1,32 @@
+<html>
+<!--
+  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.
+-->
+
+<body>
+ <h1>Olingo OData 4.0 Reference Scenario Service</h1>
+ <hr>
+ <h2>Reference Scenario Service</h2>
+ <lu>
+ <li><a href="odata.svc/">Service Document</a></li>
+ <li><a href="odata.svc/$metadata">Metadata</a></li>
+ </lu>
+
+</body>
+
+</html>

lib/server-api/pom.xml

@@ -40,6 +40,12 @@
       <artifactId>olingo-commons-api</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>javax.servlet</groupId>
+      <artifactId>servlet-api</artifactId>
+      <version>2.5</version>
+      <scope>provided</scope>
+    </dependency>
   </dependencies>
 
 </project>

lib/server-api/src/main/java/org/apache/olingo/server/api/ODataServer.java

@@ -18,6 +18,9 @@
  */
 package org.apache.olingo.server.api;
 
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
 import org.apache.olingo.commons.api.ODataRuntimeException;
 import org.apache.olingo.server.api.serializer.ODataFormat;
 import org.apache.olingo.server.api.serializer.ODataSerializer;
@@ -45,4 +48,6 @@ public abstract class ODataServer {
 
   public abstract ODataSerializer getSerializer(ODataFormat format);
 
+  public abstract void handle(HttpServletRequest req, HttpServletResponse resp);
+
 }

lib/server-core/src/main/java/org/apache/olingo/server/core/ODataServerImpl.java

@@ -18,6 +18,11 @@
  */
 package org.apache.olingo.server.core;
 
+import java.io.IOException;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
 import org.apache.olingo.commons.api.ODataRuntimeException;
 import org.apache.olingo.server.api.ODataServer;
 import org.apache.olingo.server.api.serializer.ODataFormat;
@@ -44,4 +49,15 @@ public class ODataServerImpl extends ODataServer {
     return serializer;
   }
 
+  @Override
+  public void handle(HttpServletRequest req, HttpServletResponse resp) {
+    
+    try {
+      resp.getWriter().print("Hello World!");
+    } catch (IOException e) {
+      throw new ODataRuntimeException(e);
+    }
+    
+  }
+
 }