BAEL-1388 Introduction to Java MSF4J Microservices (#4192)

* BAEL-1562 - Thymeleaf sample working

* BAEL-1562 Code added for Fragments sample

* BAEL-1562 - Last correction for the test

* BAEL-1562 - Thymeleaf sample working

* BAEL-1562 Code added for Fragments sample

* BAEL-1562 - Last correction for the test

* Updates Thymeleaf version to 3.0.9.RELEASE

* Added msf4j projects

* updated msf4j project folder

* fixed issue with spring-thymeleaf/pom.xml

* Removed depedency-reduced-pom.xml

* Whitespacing fix

msf4j/pom.xml

@@ -0,0 +1,32 @@
+<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">
+
+    <parent>
+        <groupId>org.wso2.msf4j</groupId>
+        <artifactId>msf4j-service</artifactId>
+        <version>2.6.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.baeldung.msf4j</groupId>
+    <artifactId>msf4j</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>WSO2 MSF4J Microservice</name>
+
+    <properties>
+        <microservice.mainClass>com.baeldung.msf4j.msf4jintro.Application</microservice.mainClass>
+    </properties>
+       <dependencies>
+        <dependency>
+            <groupId>org.wso2.msf4j</groupId>
+            <artifactId>msf4j-spring</artifactId>
+            <version>2.6.1</version>
+        </dependency>
+        <dependency>
+            <groupId>org.wso2.msf4j</groupId>
+            <artifactId>msf4j-mustache-template</artifactId>
+            <version>2.6.1</version>
+        </dependency>
+    </dependencies>
+
+</project>

msf4j/src/main/java/com/baeldung/msf4j/msf4japi/Application.java

@@ -0,0 +1,11 @@
+package com.baeldung.msf4j.msf4japi;
+
+import org.wso2.msf4j.MicroservicesRunner;
+
+public class Application {
+    public static void main(String[] args) {
+        new MicroservicesRunner()
+            .deploy(new MenuService())
+            .start();
+    }
+}

msf4j/src/main/java/com/baeldung/msf4j/msf4japi/Meal.java

@@ -0,0 +1,20 @@
+package com.baeldung.msf4j.msf4japi;
+
+public class Meal {
+    private String name;
+    private Float price;
+
+    public Meal(String name, Float price) {
+        this.name = name;
+        this.price = price;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Float getPrice() {
+        return price;
+    }
+
+}

msf4j/src/main/java/com/baeldung/msf4j/msf4japi/MenuService.java

@@ -0,0 +1,78 @@
+package com.baeldung.msf4j.msf4japi;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.DELETE;
+import javax.ws.rs.GET;
+import javax.ws.rs.POST;
+import javax.ws.rs.PUT;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.Response;
+
+import com.google.gson.Gson;
+
+@Path("/menu")
+public class MenuService {
+
+    private List<Meal> meals = new ArrayList<Meal>();
+    
+    public MenuService() {
+        meals.add(new Meal("Java beans",42.0f));
+    }
+    
+    @GET
+    @Path("/")
+    @Produces({ "application/json" })
+    public Response index() {
+        return Response.ok()
+            .entity(meals)
+            .build();
+    }
+
+    @GET
+    @Path("/{id}")
+    @Produces({ "application/json" })
+    public Response meal(@PathParam("id") int id) {
+        return Response.ok()
+            .entity(meals.get(id))
+            .build();
+    }
+    
+
+    @POST
+    @Path("/")
+    @Consumes("application/json")
+    @Produces({ "application/json" })
+    public Response create(Meal meal) {
+        meals.add(meal);
+        return Response.ok()
+            .entity(meal)
+            .build();
+    }
+
+    @PUT
+    @Path("/{id}")
+    @Consumes("application/json")
+    @Produces({ "application/json" })
+    public Response update(@PathParam("id") int id, Meal meal) {
+        meals.set(id, meal);
+        return Response.ok()
+            .entity(meal)
+            .build();
+    }
+
+    @DELETE
+    @Path("/{id}")
+    @Produces({ "application/json" })
+    public Response delete(@PathParam("id") int id) {
+        Meal meal = meals.get(id);
+        meals.remove(id);
+        return Response.ok()
+            .entity(meal)
+            .build();
+    }
+}

msf4j/src/main/java/com/baeldung/msf4j/msf4jintro/Application.java

@@ -0,0 +1,11 @@
+package com.baeldung.msf4j.msf4jintro;
+
+import org.wso2.msf4j.MicroservicesRunner;
+
+public class Application {
+    public static void main(String[] args) {
+        new MicroservicesRunner()
+            .deploy(new SimpleService())
+            .start();
+    }
+}

msf4j/src/main/java/com/baeldung/msf4j/msf4jintro/SimpleService.java

@@ -0,0 +1,21 @@
+package com.baeldung.msf4j.msf4jintro;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+
+@Path("/")
+public class SimpleService {
+
+    @GET
+    public String index() {
+        return "Default content";
+    }
+
+    @GET
+    @Path("/say/{name}")
+    public String say(@PathParam("name") String name) {
+        return "Hello " + name;
+    }
+
+}

msf4j/src/main/java/com/baeldung/msf4j/msf4jspring/Application.java

@@ -0,0 +1,10 @@
+package com.baeldung.msf4j.msf4jspring;
+
+import org.wso2.msf4j.spring.MSF4JSpringApplication;
+
+public class Application {
+
+    public static void main(String[] args) {
+        MSF4JSpringApplication.run(Application.class, args);
+    }
+}

msf4j/src/main/java/com/baeldung/msf4j/msf4jspring/configuration/PortConfiguration.java

@@ -0,0 +1,15 @@
+package com.baeldung.msf4j.msf4jspring.configuration;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.wso2.msf4j.spring.transport.HTTPTransportConfig;
+
+@Configuration
+public class PortConfiguration {
+
+    @Bean
+    public HTTPTransportConfig http() {
+        return new HTTPTransportConfig(9090);
+    }
+
+}

msf4j/src/main/java/com/baeldung/msf4j/msf4jspring/domain/Meal.java

@@ -0,0 +1,20 @@
+package com.baeldung.msf4j.msf4jspring.domain;
+
+public class Meal {
+    private String name;
+    private Float price;
+
+    public Meal(String name, Float price) {
+        this.name = name;
+        this.price = price;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Float getPrice() {
+        return price;
+    }
+
+}

msf4j/src/main/java/com/baeldung/msf4j/msf4jspring/repositories/MealRepository.java

@@ -0,0 +1,37 @@
+package com.baeldung.msf4j.msf4jspring.repositories;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.springframework.stereotype.Component;
+import com.baeldung.msf4j.msf4jspring.domain.Meal;
+
+@Component
+public class MealRepository {
+
+    private List<Meal> meals = new ArrayList<Meal>();
+
+    public MealRepository() {
+        meals.add(new Meal("Salad", 4.2f));
+        meals.add(new Meal("Litre of cola", 2.99f));
+    }
+
+    public void create(Meal meal) {
+        meals.add(meal);
+    }
+
+    public void remove(Meal meal) {
+        meals.remove(meal);
+    }
+
+    public Meal find(int id) {
+        return meals.get(id);
+    }
+
+    public List<Meal> findAll() {
+        return meals;
+    }
+
+    public void update(int id, Meal meal) {
+        meals.set(id, meal);
+    }
+}

msf4j/src/main/java/com/baeldung/msf4j/msf4jspring/resources/MealResource.java

@@ -0,0 +1,47 @@
+package com.baeldung.msf4j.msf4jspring.resources;
+
+import java.util.Collections;
+import java.util.Map;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+import org.wso2.msf4j.template.MustacheTemplateEngine;
+
+import com.baeldung.msf4j.msf4jspring.services.MealService;
+
+@Component
+@Path("/meal")
+public class MealResource {
+
+    @Autowired
+    private MealService mealService;
+
+    @GET
+    @Path("/")
+    public Response all() {
+        Map map = Collections.singletonMap("meals", mealService.findAll());
+        String html = MustacheTemplateEngine.instance()
+            .render("meals.mustache", map);
+        return Response.ok()
+            .type(MediaType.TEXT_HTML)
+            .entity(html)
+            .build();
+    }
+
+    @GET
+    @Path("/{id}")
+    @Produces({ "text/xml" })
+    public Response meal(@PathParam("id") int id) {
+        return Response.ok()
+            .entity(mealService.find(id))
+            .build();
+    }
+
+}

msf4j/src/main/java/com/baeldung/msf4j/msf4jspring/services/MealService.java

@@ -0,0 +1,27 @@
+package com.baeldung.msf4j.msf4jspring.services;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import com.baeldung.msf4j.msf4jspring.domain.Meal;
+import com.baeldung.msf4j.msf4jspring.repositories.MealRepository;
+
+@Service
+public class MealService {
+    @Autowired
+    private MealRepository mealRepository;
+
+    public Meal find(int id) {
+        return mealRepository.find(id);
+    }
+
+    public List<Meal> findAll() {
+        return mealRepository.findAll();
+    }
+
+    public void create(Meal meal) {
+        mealRepository.create(meal);
+    }
+}

msf4j/src/main/resources/templates/meals.mustache

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<head>
+	<title>Meals</title>
+</head>
+<body>
+	<div>
+	    <h1>Today's Meals</h1>
+	    {{#meals}}
+	    	<div>{{name}}: {{price}}$ </div>
+	    {{/meals}}
+	</div>
+</body>
+</html>

pom.xml

@@ -102,6 +102,7 @@
         <module>metrics</module>
         <module>maven</module>
         <module>mesos-marathon</module>
+        <module>msf4j</module>
         <module>testing-modules/mockito</module>
         <module>testing-modules/mockito-2</module>
         <module>testing-modules/mocks</module>