OSFUSE-296: Provide example usage of properties from ConfigMap in Karaf quickstart

README.md

@@ -1,16 +1,25 @@
 # Karaf Camel Log QuickStart
 
-This quickstart shows a simple Apache Camel application that logs a message to the server log every 5th second.
-
-This example is implemented using solely the XML DSL (there is no Java code). The source code is provided in the following XML file `src/main/resources/OSGI-INF/blueprint/camel-log.xml`.
+This quickstart shows a simple Apache Camel application that logs a message taken from a Kubernetes ConfigMap to the server log every 5th second.
 It also shows how Karaf assembly files can be overriden using resources from `src/main/resources/assembly/`. The included sample log file `etc/org.ops4j.pax.logging.cfg` sets the log level to DEBUG. 
 
+Before running the example you should create a ConfigMap named camel-log in Kubernetes with at least a single key named message.
+
+* Kubernetes:
+    ```
+    kubectl create configmap camel-log --from-literal=message=Hello
+    ```
+
+* OpenShift:
+    ```
+    oc create configmap camel-log --from-literal=message=Hello
+    ```
 
 ### Building
 
 The example can be built with
 
-    mvn clean install
+    mvn clean install -Ddocker.skip
 
 
 ### Running the example in fabric8

pom.xml

@@ -33,9 +33,8 @@
     <!-- configure the versions you want to use here -->
     <camel.version>2.17.3</camel.version>
     <karaf.version>2.4.4</karaf.version>
-    <karaf.plugin.version>4.0.5</karaf.plugin.version>
+    <karaf.plugin.version>4.0.6</karaf.plugin.version>
     <fabric8.version>2.2.161</fabric8.version>
-    <kubernetes-client.version>1.3.72</kubernetes-client.version>
 
     <maven-compiler-plugin.version>3.3</maven-compiler-plugin.version>
     <maven-surefire-plugin.version>2.18.1</maven-surefire-plugin.version>
@@ -115,13 +114,6 @@
       <classifier>features</classifier>
       <type>xml</type>
     </dependency>
-    <dependency>
-      <groupId>io.fabric8.kubernetes</groupId>
-      <artifactId>kubernetes-karaf</artifactId>
-      <version>${kubernetes-client.version}</version>
-      <classifier>features</classifier>
-      <type>xml</type>
-    </dependency>
     <dependency>
       <groupId>io.fabric8</groupId>
       <artifactId>fabric8-karaf-features</artifactId>
@@ -206,8 +198,6 @@
             <feature>jaas</feature>
             <feature>aries-blueprint</feature>
             <feature>camel-blueprint</feature>
-            <feature>kubernetes-client</feature>
-            <feature>openshift-client</feature>
             <feature>fabric8-karaf-blueprint</feature>
           </startupFeatures>
           <startupBundles>
@@ -220,7 +210,6 @@
             -->
             <feature>static</feature>
           </blacklistedFeatures>
-          <blacklistPolicy>Discard</blacklistPolicy>
           <libraries>
             <library>
               mvn:org.apache.karaf.jaas/org.apache.karaf.jaas.boot/${karaf.version};type:=boot;export:=true;delegate:=true

src/main/java/io/fabric8/quickstarts/camel/log/MyBean.java

@@ -0,0 +1,28 @@
+/**
+ *  Copyright 2005-2016 Red Hat, Inc.
+ *
+ *  Red Hat 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 io.fabric8.quickstarts.camel.log;
+
+public class MyBean {
+    private final String message;
+
+    public MyBean(String message) {
+        this.message = message;
+    }
+
+    public String getMessage() {    
+        return message;    
+    }
+}

src/main/resources/OSGI-INF/blueprint/camel-log.xml

@@ -23,34 +23,46 @@
    The root element for any OSGi Blueprint file is 'blueprint' - you also see the namespace definitions for both the Blueprint
    and the Camel namespaces.
 -->
-<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0" 
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:ext="http://aries.apache.org/blueprint/xmlns/blueprint-ext/v1.2.0"
     xsi:schemaLocation="
-             http://www.osgi.org/xmlns/blueprint/v1.0.0 https://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd
-             http://camel.apache.org/schema/blueprint http://camel.apache.org/schema/blueprint/camel-blueprint.xsd">
-
-    <!--
-      The namespace for the camelContext element in Blueprint is 'http://camel.apache.org/schema/blueprint'.
-
-      While it is not required to assign id's to the <camelContext/> and <route/> elements, it is a good idea
-      to set those for runtime management purposes (logging, JMX MBeans, ...)
-    -->
-    <camelContext id="log-example-context" xmlns="http://camel.apache.org/schema/blueprint" >
-
-        <!--
-          A very simple Camel route, that uses a timer to trigger a message every 5 second.
-
-          The <setBody> sets a body into the Camel Message.
-
-          The <log/> elements are used to add human-friendly business logging statements. They make it easier to see what the
-          route is doing.
-        -->
-        <route id="log-route">
-          <from uri="timer:foo?period=1s"/>
-            <setBody>
-                <simple>Hello from Camel!</simple>
-            </setBody>
-            <log message=">>> ${body} : ${id}"/>
-        </route>
-    </camelContext>
+      http://www.osgi.org/xmlns/blueprint/v1.0.0 
+      https://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd
+      http://camel.apache.org/schema/blueprint 
+      http://camel.apache.org/schema/blueprint/camel-blueprint.xsd
+      http://aries.apache.org/blueprint/xmlns/blueprint-ext/v1.3.0
+      http://aries.apache.org/schemas/blueprint-ext/blueprint-ext-1.3.xsd">
+
+  <ext:property-placeholder evaluator="fabric8" placeholder-prefix="$[" placeholder-suffix="]"/>
+
+  <bean id="myBean" class="io.fabric8.quickstarts.camel.log.MyBean">
+    <argument value="$[k8s:map:camel-log/message]"/>
+  </bean>
+
+  <!--
+    The namespace for the camelContext element in Blueprint is 'http://camel.apache.org/schema/blueprint'.
+
+    While it is not required to assign id's to the <camelContext/> and <route/> elements, it is a good idea
+    to set those for runtime management purposes (logging, JMX MBeans, ...)
+  -->
+  <camelContext id="log-example-context" xmlns="http://camel.apache.org/schema/blueprint" >
+
+      <!--
+        A very simple Camel route, that uses a timer to trigger a message every 5 second.
+
+        The <setBody> sets a body into the Camel Message.
+
+        The <log/> elements are used to add human-friendly business logging statements. They make it easier to see what the
+        route is doing.
+      -->
+      <route id="log-route">
+        <from uri="timer:foo?period=1s"/>
+          <setBody>
+              <method ref="myBean" method="message"/>
+          </setBody>
+          <log message=">>> ${body} : ${id}"/>
+      </route>
+  </camelContext>
 
 </blueprint>