FELIX-1196: Allow Felix Web Console to show Karaf features

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@782261 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/karaf/webconsole/src/main/java/org/apache/felix/karaf/webconsole/FeaturesPlugin.java b/karaf/webconsole/src/main/java/org/apache/felix/karaf/webconsole/FeaturesPlugin.java
new file mode 100644
index 0000000..3351220
--- /dev/null
+++ b/karaf/webconsole/src/main/java/org/apache/felix/karaf/webconsole/FeaturesPlugin.java
@@ -0,0 +1,98 @@
+/*
+ * 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.felix.karaf.webconsole;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import javax.servlet.Servlet;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.apache.felix.karaf.gshell.features.FeaturesService;
+import org.apache.felix.webconsole.AbstractWebConsolePlugin;
+
+/**
+ * Felix Web Console plugin to interact with Karaf features
+ *
+ * @author Marcin Wilkos
+ */
+public class FeaturesPlugin extends AbstractWebConsolePlugin implements Servlet {
+
+    private static final String LABEL = "features";
+    private static final String TITLE = "Features";
+    
+    private FeaturesService featuresService;
+    
+    public FeaturesPlugin() {
+        super();
+    }
+
+    public String getTitle() {
+        return TITLE;
+    }
+
+    public String getLabel() {
+        return LABEL;
+    }
+
+    protected void renderContent(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        PrintWriter pw = response.getWriter();
+        pw.println("<pre>");
+        pw.println("</pre>");
+
+        pw.println( "<table class='content' cellpadding='0' cellspacing='0' width='100%'>" );
+
+        pw.println( "<tr class='content'>" );
+        pw.println( "<th class='content container'>" + getTitle() + "</th>" );
+        pw.println( "</tr>" );
+
+        pw.println( "<tr class='content'>" );
+        pw.println( "<td class='content'>" );
+        pw.println( "<pre>" );
+
+        pw.println("*** Features:");
+        String[] features;
+        try {
+            features = getFeatures();
+        } catch (Exception e) {
+            throw new ServletException("Unable to fetch features", e);
+        }
+        for(int i=0; i<features.length;i++){
+            pw.println(features[i]);
+        }
+
+        pw.println( "</pre>" );
+        pw.println( "</td>" );
+        pw.println( "</tr>" );
+        pw.println( "</table>" );
+    }
+
+    /*
+     * Get the list of installed/uninstalled features
+     */
+    private String[] getFeatures() throws Exception {        
+        return getFeaturesService().listFeatures();
+    }
+    
+    public FeaturesService getFeaturesService() {
+        return featuresService;
+    }
+    
+    public void setFeaturesService(FeaturesService featuresService) {
+        this.featuresService = featuresService;
+    }
+}
diff --git a/karaf/webconsole/src/main/resources/META-INF/spring/webconsole.xml b/karaf/webconsole/src/main/resources/META-INF/spring/webconsole.xml
new file mode 100644
index 0000000..3d24aad
--- /dev/null
+++ b/karaf/webconsole/src/main/resources/META-INF/spring/webconsole.xml
@@ -0,0 +1,53 @@
+<?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.
+
+-->
+<beans xmlns="http://www.springframework.org/schema/beans"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xmlns:ctx="http://www.springframework.org/schema/context"
+       xmlns:osgi="http://www.springframework.org/schema/osgi"
+       xmlns:osgix="http://www.springframework.org/schema/osgi-compendium"
+       xmlns:util="http://www.springframework.org/schema/util"
+       xmlns:gshell="http://servicemix.apache.org/schema/servicemix-gshell"
+       xsi:schemaLocation="
+  http://www.springframework.org/schema/beans
+  http://www.springframework.org/schema/beans/spring-beans.xsd
+  http://www.springframework.org/schema/context
+  http://www.springframework.org/schema/context/spring-context.xsd
+  http://www.springframework.org/schema/osgi
+  http://www.springframework.org/schema/osgi/spring-osgi.xsd
+  http://www.springframework.org/schema/osgi-compendium
+  http://www.springframework.org/schema/osgi-compendium/spring-osgi-compendium.xsd
+  http://www.springframework.org/schema/util
+  http://www.springframework.org/schema/util/spring-util.xsd
+  http://servicemix.apache.org/schema/servicemix-gshell
+  http://servicemix.apache.org/schema/servicemix-gshell/servicemix-gshell.xsd">
+
+    <osgi:reference id="featuresService" interface="org.apache.felix.karaf.gshell.features.FeaturesService" cardinality="1..1"/>
+
+    <bean id="featuresPlugin" class="org.apache.felix.karaf.webconsole.FeaturesPlugin">
+        <property name="featuresService" ref="featuresService" />
+    </bean>
+
+    <osgi:service ref="featuresPlugin" interface="javax.servlet.Servlet" >
+        <osgi:service-properties>
+            <entry key="felix.webconsole.label" value="features"/>
+        </osgi:service-properties>
+    </osgi:service>
+
+</beans>