BAEL-1277: RESTFul CRUD application with JavaLite (#3359)

* BAEL-1277: RESTFul CRUD application with JavaLite.

* BAEL-1277: RESTFul CRUD application with JavaLite. Adding exception handling.

java-lite/README.md

@@ -0,0 +1,2 @@
+### Relevant Articles:
+- [RESTFul CRUD application with JavaLite] ()

java-lite/pom.xml

@@ -0,0 +1,105 @@
+<?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>org.baeldung</groupId>
+    <artifactId>java-lite</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <properties>
+        <jetty.maven.plugin.version>9.3.4.RC1</jetty.maven.plugin.version>
+        <activejdbc.version>1.4.13</activejdbc.version>
+        <activeweb.version>1.15</activeweb.version>
+        <mysql.connector.java.version>5.1.45</mysql.connector.java.version>
+        <sun.tools.version>1.7.0</sun.tools.version>
+        <jackson.version>1.8.2</jackson.version>
+        <junit.version>4.11</junit.version>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.eclipse.jetty</groupId>
+                <artifactId>jetty-maven-plugin</artifactId>
+                <version>${jetty.maven.plugin.version}</version>
+                <configuration>
+                    <systemProperties>
+                        <systemProperty>
+                            <name>activejdbc.log</name>
+                            <value></value>
+                        </systemProperty>
+                        <systemProperty>
+                            <name>active_reload</name>
+                            <value>true</value>
+                        </systemProperty>
+                        <systemProperty>
+                            <name>activeweb.log.request</name>
+                            <value>true</value>
+                        </systemProperty>
+                    </systemProperties>
+                </configuration>
+            </plugin>
+
+            <plugin>
+                <groupId>org.javalite</groupId>
+                <artifactId>activejdbc-instrumentation</artifactId>
+                <version>${activejdbc.version}</version>
+                <executions>
+                    <execution>
+                        <phase>process-classes</phase>
+                        <goals>
+                            <goal>instrument</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.javalite</groupId>
+            <artifactId>activeweb</artifactId>
+            <version>${activeweb.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>${mysql.connector.java.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.sun</groupId>
+            <artifactId>tools</artifactId>
+            <version>${sun.tools.version}</version>
+            <scope>system</scope>
+            <systemPath>${java.home}/../lib/tools.jar</systemPath>
+        </dependency>
+
+        <dependency>
+            <groupId>org.codehaus.jackson</groupId>
+            <artifactId>jackson-core-lgpl</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.jackson</groupId>
+            <artifactId>jackson-mapper-lgpl</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${junit.version}</version>
+        </dependency>
+    </dependencies>
+
+</project>

java-lite/src/main/java/app/config/AppBootstrap.java

@@ -0,0 +1,9 @@
+package app.config;
+
+import org.javalite.activeweb.AppContext;
+import org.javalite.activeweb.Bootstrap;
+
+public class AppBootstrap extends Bootstrap {
+    public void init(AppContext context) {
+    }
+}

java-lite/src/main/java/app/config/AppControllerConfig.java

@@ -0,0 +1,15 @@
+package app.config;
+
+import app.controllers.ProductsController;
+import org.javalite.activeweb.AbstractControllerConfig;
+import org.javalite.activeweb.AppContext;
+import org.javalite.activeweb.controller_filters.DBConnectionFilter;
+import org.javalite.activeweb.controller_filters.TimingFilter;
+
+public class AppControllerConfig extends AbstractControllerConfig {
+    @Override
+    public void init(AppContext appContext) {
+      addGlobalFilters(new TimingFilter());
+      add(new DBConnectionFilter()).to(ProductsController.class);
+    }
+}

java-lite/src/main/java/app/config/DbConfig.java

@@ -0,0 +1,11 @@
+package app.config;
+
+import org.javalite.activeweb.AbstractDBConfig;
+import org.javalite.activeweb.AppContext;
+
+public class DbConfig extends AbstractDBConfig {
+    @Override
+    public void init(AppContext appContext) {
+      this.configFile("/database.properties");
+    }
+}

java-lite/src/main/java/app/controllers/ProductsController.java

@@ -0,0 +1,101 @@
+package app.controllers;
+
+import app.models.Product;
+import org.codehaus.jackson.map.ObjectMapper;
+import org.javalite.activeweb.AppController;
+import org.javalite.activeweb.annotations.RESTful;
+
+import java.util.Map;
+
+@RESTful
+public class ProductsController extends AppController {
+
+    public void index() {
+      try {
+        view("products", Product.findAll());
+        render().contentType("application/json");
+      } catch (Exception e) {
+        view("message", "There was an error.", "code", 200);
+        render("message");
+      }
+    }
+
+    public void create() {
+      try {
+        Map payload = new ObjectMapper().readValue(getRequestString(), Map.class);
+        Product p = new Product();
+        p.fromMap(payload);
+        p.saveIt();
+        view("message", "Successfully saved product id " + p.get("id"), "code", 200);
+        render("message");
+      } catch (Exception e) {
+        view("message", "There was an error.", "code", 200);
+        render("message");
+      }
+    }
+
+    public void update() {
+      try {
+        Map payload = new ObjectMapper().readValue(getRequestString(), Map.class);
+        String id = getId();
+        Product p = Product.findById(id);
+        if (p == null) {
+          view("message", "Product id " + id + " not found.", "code", 200);
+          render("message");
+          return;
+        }
+        p.fromMap(payload);
+        p.saveIt();
+        view("message", "Successfully updated product id " + id, "code", 200);
+        render("message");
+      } catch (Exception e) {
+        view("message", "There was an error.", "code", 200);
+        render("message");
+      }
+    }
+
+    public void show() {
+      try {
+        String id = getId();
+        Product p = Product.findById(id);
+        if (p == null) {
+          view("message", "Product id " + id + " not found.", "code", 200);
+          render("message");
+          return;
+        }
+        view("product", p);
+        render("_product");
+      } catch (Exception e) {
+        view("message", "There was an error.", "code", 200);
+        render("message");
+      }
+    }
+
+    public void destroy() {
+      try {
+        String id = getId();
+        Product p = Product.findById(id);
+        if (p == null) {
+          view("message", "Product id " + id + " not found.", "code", 200);
+          render("message");
+          return;
+        }
+        p.delete();
+        view("message", "Successfully deleted product id " + id, "code", 200);
+        render("message");
+      } catch (Exception e) {
+        view("message", "There was an error.", "code", 200);
+        render("message");
+      }
+    }
+
+    @Override
+    protected String getContentType() {
+      return "application/json";
+    }
+
+    @Override
+    protected String getLayout() {
+      return null;
+    }
+}

java-lite/src/main/java/app/models/Product.java

@@ -0,0 +1,7 @@
+package app.models;
+
+import org.javalite.activejdbc.Model;
+
+public class Product extends Model {
+
+}

java-lite/src/main/resources/database.properties

@@ -0,0 +1,4 @@
+development.driver=com.mysql.jdbc.Driver
+development.username=user
+development.password=password
+development.url=jdbc:mysql://localhost/dbname

java-lite/src/main/webapp/WEB-INF/views/products/_comma.ftl

@@ -0,0 +1 @@
+,

java-lite/src/main/webapp/WEB-INF/views/products/_product.ftl

@@ -0,0 +1,4 @@
+{
+"id" : ${product.id},
+"name" : "${product.name}"
+}

java-lite/src/main/webapp/WEB-INF/views/products/index.ftl

@@ -0,0 +1 @@
+[<@render partial="product" collection=products spacer="comma"/>]

java-lite/src/main/webapp/WEB-INF/views/products/message.ftl

@@ -0,0 +1,4 @@
+{
+"message" : "${message}",
+"code" : ${code}
+}

java-lite/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<web-app xmlns="http://java.sun.com/xml/ns/javaee" version="2.5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
+
+
+    <filter>
+        <filter-name>dispatcher</filter-name>
+        <filter-class>org.javalite.activeweb.RequestDispatcher</filter-class>
+        <init-param>
+            <param-name>exclusions</param-name>
+            <param-value>css,images,js,ico</param-value>
+        </init-param>
+         <init-param>
+            <param-name>encoding</param-name>
+            <param-value>UTF-8</param-value>
+        </init-param>
+    </filter>
+
+
+    <filter-mapping>
+        <filter-name>dispatcher</filter-name>
+        <url-pattern>/*</url-pattern>
+    </filter-mapping>
+
+</web-app>

java-lite/src/test/java/app/models/ProductTest.java

@@ -0,0 +1,25 @@
+package app.models;
+
+import org.javalite.activejdbc.Base;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class ProductTest {
+
+    //@Test
+    public void givenSavedProduct_WhenFindFirst_ThenSavedProductIsReturned() {
+      //Open DB connection
+      Base.open("com.mysql.jdbc.Driver", "jdbc:mysql://localhost/dbname", "user", "password");
+
+      //Create a product and save it
+      Product toSaveProduct = new Product();
+      toSaveProduct.set("name", "Bread");
+      toSaveProduct.saveIt();
+
+      //Find product
+      Product savedProduct = Product.findFirst("name = ?", "Bread");
+
+      Assert.assertEquals(toSaveProduct.get("name"), savedProduct.get("name"));
+    }
+
+}

pom.xml

@@ -85,6 +85,7 @@
         <module>jackson</module>
         <!--         <module>persistence-modules/java-cassandra</module> -->
         <module>vavr</module>
+		<module>java-lite</module>
         <module>javax-servlets</module>
         <module>javaxval</module>
         <module>jaxb</module>