WIP:feat(ch9s6): add initial code for GE

Dan K

2019-07-16 6e57953cdcd6d4da269b4bf5c9c9a96fa9ad07ca

WIP:feat(ch9s6): add initial code for GE

The "mvn fabric8:deploy" command still does not work, mostly because
it seems that the deployed "service" contains selectors for labels
that are not present on the associated Pod.

 micro-java/pom.xml

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@@ -0,0 +1,102 @@
<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.redhat.training.openshift</groupId>
    <artifactId>micro-java</artifactId>
    <version>1.0</version>
    <packaging>war</packaging>
    <name>Red Hat Training Hello Java app</name>
    <description>Hello microservice using Thorntail</description>

    <properties>
        <!-- Explicitly declaring the source encoding eliminates the following
            message: -->
        <!-- [WARNING] Using platform encoding (UTF-8 actually) to copy filtered
            resources, i.e. build is platform dependent! -->
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <failOnMissingWebXml>false</failOnMissingWebXml>

        <!-- Thorntail dependency versions -->
        <version.thorntail>2.4.0.Final</version.thorntail>

        <!-- other plugin versions -->
        <version.compiler.plugin>3.1</version.compiler.plugin>
        <version.surefire.plugin>2.16</version.surefire.plugin>
        <version.war.plugin>2.5</version.war.plugin>
                <!--
        <version.fabric8.plugin>3.1.80.redhat-000019</version.fabric8.plugin>
        <version.fabric8.plugin>3.5.38</version.fabric8.plugin>
                -->
        <version.fabric8.plugin>4.1.0</version.fabric8.plugin>

        <!-- maven-compiler-plugin -->
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.source>1.8</maven.compiler.source>

    </properties>


    <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>io.thorntail</groupId>
        <artifactId>bom-all</artifactId>
        <version>${version.thorntail}</version>
        <scope>import</scope>
        <type>pom</type>
      </dependency>
    </dependencies>
  </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>io.thorntail</groupId>
            <artifactId>cdi</artifactId>
        </dependency>
        <dependency>
            <groupId>io.thorntail</groupId>
            <artifactId>jaxrs</artifactId>
        </dependency>

    </dependencies>

    <build>
        <!-- Maven will append the version to the finalName (which is the name
            given to the generated war, and hence the context root) -->
        <finalName>hello</finalName>
        <plugins>
            <!-- The Thorntail Maven plugin creates an uber jar -->
            <!-- To use, run: mvn thorntail:run -->
            <plugin>
        <groupId>io.thorntail</groupId>
        <artifactId>thorntail-maven-plugin</artifactId>
        <version>${version.thorntail}</version>
        <executions>
          <execution>
            <goals>
              <goal>package</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>io.fabric8</groupId>
        <artifactId>fabric8-maven-plugin</artifactId>
        <version>${version.fabric8.plugin}</version>
        <executions>
          <execution>
            <id>fmp</id>
            <goals>
              <goal>resource</goal>
              <goal>build</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

</project>

 micro-java/src/main/java/com/redhat/training/openshift/hello/HelloResource.java

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package com.redhat.training.openshift.hello;

import javax.inject.Inject;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;

@Path("/")
public class HelloResource {

    @GET
    @Path("/hello")
    @Produces("text/plain")
    public String hello() {
        String hostname = System.getenv().getOrDefault("HOSTNAME", "unknown");
          String message = System.getenv().getOrDefault("APP_MSG", null);
          String response = "";

          if (message == null)
            response = "Hello world from host "+hostname+"\n";
          else
            response = "Hello world from host ["+hostname+"].";
            response += "Message received = "+message+"\n";

        return response;
    }
}

 micro-java/src/main/java/com/redhat/training/openshift/hello/JaxRsActivator.java

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package com.redhat.training.openshift.hello;

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;

@ApplicationPath("/api")
public class JaxRsActivator extends Application {
}