WIP(ch9lab) add source for java-based todo-api app

todo-api-micro/pom.xml

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+<?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/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.redhat.training.example</groupId>
+  <artifactId>todo-api</artifactId>
+  <name>WildFly Swarm Example</name>
+  <version>1.0.0-SNAPSHOT</version>
+  <packaging>war</packaging>
+
+  <properties>
+    <version.wildfly.swarm>2017.12.1</version.wildfly.swarm>
+    <version.mysql>6.0.6</version.mysql>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <maven.compiler.target>1.8</maven.compiler.target>
+    <failOnMissingWebXml>false</failOnMissingWebXml>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <fabric8.maven.plugin.version>3.1.80.redhat-000019</fabric8.maven.plugin.version>
+    <fabric8.version>2.3.6</fabric8.version>
+  </properties>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.wildfly.swarm</groupId>
+        <artifactId>bom-all</artifactId>
+        <version>${version.wildfly.swarm}</version>
+        <scope>import</scope>
+        <type>pom</type>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
+  <build>
+    <finalName>demo</finalName>
+    <plugins>
+      <plugin>
+        <groupId>org.wildfly.swarm</groupId>
+        <artifactId>wildfly-swarm-plugin</artifactId>
+        <version>${version.wildfly.swarm}</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>package</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>io.fabric8</groupId>
+        <artifactId>fabric8-maven-plugin</artifactId>
+        <executions>
+          <execution>
+            <goals>
+              <goal>resource</goal>
+              <goal>build</goal>
+            </goals>
+          </execution>
+        </executions>
+        <configuration>
+          <generator>
+            <includes>
+              <include>wildfly-swarm</include>
+            </includes>
+            <excludes>
+              <exclude>webapp</exclude>
+            </excludes>
+            <config>
+              <wildfly-swarm>
+                <fromMode>isTag</fromMode>
+                <from>redhat-openjdk18-openshift</from>
+              </wildfly-swarm>
+            </config>
+          </generator>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+  <dependencies>
+    <!-- Java EE 7 dependency -->
+    <dependency>
+      <groupId>javax</groupId>
+      <artifactId>javaee-api</artifactId>
+      <version>7.0</version>
+      <scope>provided</scope>
+    </dependency>
+    <!-- WildFly Swarm Fractions -->
+    <dependency>
+      <groupId>org.wildfly.swarm</groupId>
+      <artifactId>jaxrs-jsonp</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.wildfly.swarm</groupId>
+      <artifactId>jpa</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.wildfly.swarm</groupId>
+      <artifactId>ejb</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.wildfly.swarm</groupId>
+      <artifactId>datasources</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>mysql</groupId>
+      <artifactId>mysql-connector-java</artifactId>
+      <version>${version.mysql}</version>
+    </dependency>
+  </dependencies>
+</project>

todo-api-micro/src/main/fabric8/deployment.yml

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+spec:
+  template:
+    spec:
+      containers:
+        - 
+          resources:
+            requests:
+              cpu: "0.2"
+#              memory: 256Mi
+            limits:
+              cpu: "1.0"
+#              memory: 256Mi
+          env:
+          - name: DATABASE_USER
+            value: '${database.user}'
+          - name: DATABASE_PASSWORD
+            value: '${database.password}'
+          - name: DATABASE_SVC_HOSTNAME
+            value: '${database.svc.hostname}'
+          - name: DATABASE_NAME
+            value: '${database.name}'

todo-api-micro/src/main/fabric8/route.yml

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+---
+apiVersion: v1
+kind: Route
+metadata:
+  labels:
+    expose: "true"
+    app: ${project.artifactId}
+    provider: fabric8
+    version: "1.0"
+    group: com.redhat.training
+  name: ${project.artifactId}
+spec:
+  host: ${hostname}
+  port:
+    targetPort: ${service-port}
+  to:
+    kind: Service
+    name: ${project.artifactId}

todo-api-micro/src/main/fabric8/svc.yml

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+---
+apiVersion: v1
+kind: Service
+metadata:
+  annotations:
+    fabric8.io/iconUrl: img/icons/camel.svg
+  labels:
+    expose: "true"
+    app: ${project.artifactId}
+    provider: fabric8
+    version: "1.0"
+    group: com.redhat.training
+  name: ${project.artifactId}
+spec:
+  ports:
+  - name: http
+    port: ${service-port}
+    protocol: TCP
+    targetPort: ${service-port}
+  selector:
+    deploymentconfig: ${project.artifactId}

todo-api-micro/src/main/java/com/redhat/training/example/todoapi/rest/HelloWorldEndpoint.java

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+package com.redhat.training.example.todoapi.rest;
+
+
+import javax.ws.rs.Path;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.GET;
+import javax.ws.rs.Produces;
+
+
+@Path("/hello")
+public class HelloWorldEndpoint {
+
+	@GET
+	@Produces("text/plain")
+	public Response doGet() {
+		return Response.ok("Hello World!").build();
+
+	}
+}

todo-api-micro/src/main/java/com/redhat/training/example/todoapi/rest/Main.java

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+package com.redhat.training.example.todoapi.rest;
+
+import org.wildfly.swarm.Swarm;
+import org.wildfly.swarm.datasources.DatasourcesFraction;
+
+public class Main {
+    public static void main(String[] args) throws Exception {
+        String host = System.getenv("HOST");
+        new Swarm()
+                .fraction(new DatasourcesFraction()
+                        .jdbcDriver("mysql", (d) -> {
+                            d.driverClassName("com.mysql.cj.jdbc.Driver");
+                            d.xaDatasourceClass("com.mysql.jdbc.jdbc2.optional.MysqlXADataSource");
+                            d.driverModuleName("com.mysql");
+                        })
+                        .dataSource("MySQLDS", (ds) -> {
+                            ds.driverName("mysql");
+                            ds.connectionUrl("jdbc:mysql://"+host+":8889/todo");
+                            ds.userName("root");
+                            ds.password("root");
+                        }))
+                .start()
+                .deploy();
+    }
+}

todo-api-micro/src/main/java/com/redhat/training/model/Host.java

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+package com.redhat.training.model;
+
+import java.net.InetAddress;
+
+public class Host {
+
+	private String ip;
+	private String hostname;
+
+	public Host(String ip, String hostname) {
+		this.ip = ip;
+		this.hostname = hostname;
+	}
+
+	public String getIp() {
+		return ip;
+	}
+
+	public String getHostname() {
+		return hostname;
+	}
+
+}
+

todo-api-micro/src/main/java/com/redhat/training/model/Item.java

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+package com.redhat.training.model;
+
+import javax.persistence.*;
+
+@Entity
+public class Item {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String description;
+
+    private Boolean done = false;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public Boolean isDone() {
+        return done;
+    }
+
+    public void setDone(Boolean done) {
+        this.done = done;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) { return true; }
+        if (o == null || getClass() != o.getClass()) { return false; }
+
+        Item item = (Item) o;
+
+        return id.equals(item.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return id.hashCode();
+    }
+}

todo-api-micro/src/main/java/com/redhat/training/rest/CORSRequestFilter.java

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+package com.redhat.training.rest;
+
+import java.io.IOException;
+import java.util.logging.Logger;
+
+import javax.ws.rs.container.ContainerRequestContext;
+import javax.ws.rs.container.ContainerRequestFilter;
+import javax.ws.rs.container.PreMatching;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.Provider;
+
+@Provider
+@PreMatching
+public class CORSRequestFilter implements ContainerRequestFilter {
+
+    private final static Logger log = Logger.getLogger(CORSRequestFilter.class.getName());
+
+    @Override
+    public void filter(ContainerRequestContext requestCtx) throws IOException {
+        log.fine("Executing REST request filter");
+
+        // When HttpMethod comes as OPTIONS, just acknowledge that it accepts...
+        if (requestCtx.getRequest().getMethod().equals( "OPTIONS" )) {
+            log.fine("HTTP Method (OPTIONS) - Detected!");
+
+            // Just send a OK signal back to the browser
+            requestCtx.abortWith(Response.status(Response.Status.OK).build());
+        }
+    }
+}

todo-api-micro/src/main/java/com/redhat/training/rest/CORSResponseFilter.java

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+package com.redhat.training.rest;
+
+import java.io.IOException;
+import java.util.logging.Logger;
+
+import javax.ws.rs.container.ContainerRequestContext;
+import javax.ws.rs.container.ContainerResponseContext;
+import javax.ws.rs.container.ContainerResponseFilter;
+import javax.ws.rs.container.PreMatching;
+import javax.ws.rs.core.MultivaluedMap;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.Provider;
+
+@Provider
+@PreMatching
+public class CORSResponseFilter implements ContainerResponseFilter {
+
+    private final static Logger log = Logger.getLogger(CORSResponseFilter.class.getName());
+
+    @Override
+	public void filter(ContainerRequestContext requestCtx, ContainerResponseContext responseCtx) throws IOException {
+        log.fine("Executing REST response filter");
+
+		MultivaluedMap<String, Object> headers = responseCtx.getHeaders();
+
+		headers.add("Access-Control-Allow-Origin", "*");
+		headers.add("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, OPTIONS");			
+		headers.add("Access-Control-Allow-Headers", "X-Requested-With, Content-Type");
+		//responseCtx.getHeaders().add( "Access-Control-Allow-Credentials", "true" );
+	}
+
+}

todo-api-micro/src/main/java/com/redhat/training/rest/HostService.java

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+package com.redhat.training.rest;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+import javax.ejb.Stateless;
+import javax.ws.rs.Consumes;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+
+import com.redhat.training.model.Host;
+
+@Stateless
+@Path("host")
+@Consumes(MediaType.APPLICATION_JSON)
+@Produces(MediaType.APPLICATION_JSON)
+public class HostService {
+
+    @GET
+    public Host getHostInfo() throws UnknownHostException {
+    	InetAddress address = InetAddress.getLocalHost();
+    	Host host = new Host(address.getHostAddress(), address.getHostName());
+    	return host;
+    }
+}
+