lightweight javaee with guice
DESCRIPTION
Lightweight JavaEE with GuiceTRANSCRIPT
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Lightweight JavaEE
with Guice
(c) copyright 2013 nuboat in wonderlandSunday, June 16, 13
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About MeCTO & Co-Founder @ Signature App House
Software Architecture @ FICO.com
Blogger at thjug.blogspot.com
Twitter Addict
Programmer lover <3
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RequirementJava SDK 7u21 or latest
Netbeans JavaEE 7.3 or latest
PostgreSQL 9.2 or latest
Chrome Browser latest version
Postman - REST Client
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TopicsNetbeans - Create Development Test Deploy
Maven - Library Management
Servlet + JAX-RS - RESTful Webservice
Guice - Transaction & Dependency Injection
JPA - Object Relational Mapping
Shiro - Encrypt Password
TestNG - Unit Test Framework
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Netbeans
NetBeans IDE lets you quickly and easily develop Java desktop, mobile, and web applications, while also providing great tools for PHP and C/C++ developers. It is free and open source and has a large community of users and developers around the world.
Best Support for Latest Java Technologies
NetBeans IDE provides first-class comprehensive support for the newest Java technologies and latest Java enhancements before other IDEs. It is the first IDE providing support for JDK 7, Java EE 7, and JavaFX 2.
With its constantly improving Java Editor, many rich features and an extensive range of tools, templates and samples, NetBeans IDE sets the standard for developing with cutting edge technologies out of the box
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MavenStandard Build Infrastructure
Build Tool
Dependency Management Tool
Quality Tool
Opensource Apache Project
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http://thjug.blogspot.com/2013/04/what-is-maven-1.html
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MVN Standard Directory
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my-app|-- pom.xml|-- target|-- src |-- main | `-- java | `-- resources | `-- webapp | |-- test `-- java `-- resources
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Jersey
Jersey is the open source, production quality, JAX-RS (JSR 311 & JSR 339) Reference Implementation for building RESTful Web services. But, it is also more than the Reference Implementation. Jersey provides an API so that developers may extend Jersey to suit their needs.
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GuiceGoogle Guice (pronounced "juice")[1] is an open source software framework for the Java platform released by Google under the Apache License. It provides support for dependency injection using annotations to configure Java objects.[2] Dependency injection is a design pattern whose core principle is to separate behavior from dependency resolution.
Example@InjectLogger Logger logger;@Inject SigninFacade facade;@Inject EntityManager em;
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JPADevelopment of a new version of JPA, namely JPA 2.0 JSR 317 was started in July 2007. JPA 2.0 was approved as final on December 10, 2009.The focus of JPA 2.0 was to address features that were present in some of the popular ORM vendors but couldn't gain consensus approval for JPA 1.0.The main features included in this update are:• Expanded object-relational mapping functionality
• support for collections of embedded objects, linked in the ORM with a many-to-one relationship
• multiple levels of embedded objects• ordered lists• combinations of access types
• A criteria query API• standardization of query 'hints'[clarify]
• standardization of additional metadata to support DDL generation• support for validation
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Create Project
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Create Project
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pom.xmlModel Attribute
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<modelVersion>4.0.0</modelVersion>
<groupId>com.thjug</groupId> <artifactId>Services</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging>
<name>Services</name>
<properties> <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties>
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pom.xmlRepositories Attribute
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! <repositories>! ! <repository>! ! ! <id>EclipseLink</id>! ! ! <url>http://download.eclipse.org/rt/eclipselink/maven.repo</url>! ! </repository>! </repositories>
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pom.xmlServlet Dependency
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! ! <dependency>! ! ! <groupId>org.apache.openejb</groupId>! ! ! <artifactId>javaee-api</artifactId>! ! ! <version>6.0-5</version>! ! </dependency>! ! <dependency>! ! ! <groupId>com.sun.jersey</groupId>! ! ! <artifactId>jersey-server</artifactId>! ! ! <version>1.17.1</version>! ! </dependency>! ! <dependency>! ! ! <groupId>com.sun.jersey</groupId>! ! ! <artifactId>jersey-servlet</artifactId>! ! ! <version>1.17.1</version>! ! </dependency>! ! <dependency>! ! ! <groupId>com.sun.jersey.contribs</groupId>! ! ! <artifactId>jersey-guice</artifactId>! ! ! <version>1.17.1</version>! ! </dependency>
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pom.xmlCommon Dependency
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! ! <dependency>! ! ! <groupId>commons-lang</groupId>! ! ! <artifactId>commons-lang</artifactId>! ! ! <version>2.6</version>! ! </dependency>! ! <dependency>! ! ! <groupId>commons-io</groupId>! ! ! <artifactId>commons-io</artifactId>! ! ! <version>2.4</version>! ! </dependency>! ! <dependency>! ! ! <groupId>commons-fileupload</groupId>! ! ! <artifactId>commons-fileupload</artifactId>! ! ! <version>1.3</version>! ! </dependency>
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pom.xmlGuice Dependency
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! ! <dependency>! ! ! <groupId>com.google.inject</groupId>! ! ! <artifactId>guice</artifactId>! ! ! <version>3.0</version>! ! </dependency>! ! <dependency>! ! ! <groupId>com.google.inject.extensions</groupId>! ! ! <artifactId>guice-servlet</artifactId>! ! ! <version>3.0</version>! ! </dependency>! ! <dependency>! ! ! <groupId>com.google.inject.extensions</groupId>! ! ! <artifactId>guice-persist</artifactId>! ! ! <version>3.0</version>! ! </dependency>
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pom.xmlModel Dependency
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! ! <dependency>! ! ! <groupId>postgresql</groupId>! ! ! <artifactId>postgresql</artifactId>! ! ! <version>9.1-901-1.jdbc4</version>! ! </dependency>! ! <dependency>! ! ! <groupId>org.eclipse.persistence</groupId>! ! ! <artifactId>eclipselink</artifactId>! ! ! <version>2.5.0</version>! ! ! <exclusions>! ! ! ! <exclusion>! ! ! ! ! <artifactId>commonj.sdo</artifactId>! ! ! ! ! <groupId>commonj.sdo</groupId>! ! ! ! </exclusion>! ! ! </exclusions>! ! </dependency>
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pom.xmlLogging Dependency
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! ! <dependency>! ! ! <groupId>ch.qos.logback</groupId>! ! ! <artifactId>logback-classic</artifactId>! ! ! <version>1.0.13</version>! ! </dependency>! ! <dependency>! ! ! <groupId>commons-logging</groupId>! ! ! <artifactId>commons-logging</artifactId>! ! ! <version>1.1.3</version>! ! </dependency>
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pom.xmlSecurity Dependency
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! ! <dependency>! ! ! <groupId>org.apache.shiro</groupId>! ! ! <artifactId>shiro-core</artifactId>! ! ! <version>1.2.2</version>! ! </dependency>
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pom.xmlTest Dependency
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! ! <dependency>! ! ! <groupId>org.testng</groupId>! ! ! <artifactId>testng</artifactId>! ! ! <version>6.8.5</version>! ! ! <scope>test</scope>! ! </dependency>
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web.xml
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! <display-name>Services</display-name>! <filter>! ! <filter-name>guiceFilter</filter-name>! ! <filter-class>com.google.inject.servlet.GuiceFilter</filter-class>! </filter>! <filter-mapping>! ! <filter-name>guiceFilter</filter-name>! ! <url-pattern>/*</url-pattern>! </filter-mapping>! <listener>! ! <description>Guice Initiate</description>! ! <listener-class>com.thjug.base.ServletContextListener</listener-class>! </listener>! <welcome-file-list>! ! <welcome-file>index.jsp</welcome-file>! </welcome-file-list>
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web.xml
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! <display-name>Services</display-name>! <filter>! ! <filter-name>guiceFilter</filter-name>! ! <filter-class>com.google.inject.servlet.GuiceFilter</filter-class>! </filter>! <filter-mapping>! ! <filter-name>guiceFilter</filter-name>! ! <url-pattern>/*</url-pattern>! </filter-mapping>! <listener>! ! <description>Guice Initiate</description>! ! <listener-class>com.thjug.base.ServletContextListener</listener-class>! </listener>! <welcome-file-list>! ! <welcome-file>index.jsp</welcome-file>! </welcome-file-list>
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logback.xml
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<?xml version="1.0" encoding="UTF-8"?><configuration>! <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">! ! <layout class="ch.qos.logback.classic.PatternLayout">! ! ! <Pattern>%d{HH:mm:ss.SSS} %logger{0} - %msg%n</Pattern>! ! </layout>! </appender>
! <logger name="com.thjug" level="DEBUG"/>
! <root level="debug">! ! <appender-ref ref="STDOUT" />! </root></configuration>
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persistence.xml
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<?xml version="1.0" encoding="UTF-8"?><persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">! <persistence-unit name="dbUnit" transaction-type="RESOURCE_LOCAL">! ! <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>! ! <class>com.thjug.entity.Account</class>! ! <class>com.thjug.entity.History</class>! ! <shared-cache-mode>ENABLE_SELECTIVE</shared-cache-mode>! ! <properties>! ! ! <property name="eclipselink.logging.level" value="FINE"/>! ! ! <property name="eclipselink.logging.parameters" value="true"/>! ! ! <property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver"/>! ! ! <property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/training"/>! ! ! <property name="javax.persistence.jdbc.user" value="training"/>! ! ! <property name="javax.persistence.jdbc.password" value="password"/>! ! </properties>! </persistence-unit></persistence>
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import com.google.inject.Guice;import com.google.inject.Injector;import com.google.inject.Singleton;import com.google.inject.persist.jpa.JpaPersistModule;import com.google.inject.servlet.GuiceServletContextListener;import com.sun.jersey.guice.JerseyServletModule;import com.sun.jersey.guice.spi.container.servlet.GuiceContainer;import com.sun.jersey.spi.container.servlet.ServletContainer;import com.thjug.restws.Echo;import com.thjug.restws.Signin;import com.thjug.restws.Status;
public class ServletContextListener extends GuiceServletContextListener {! @Override! protected Injector getInjector() {! ! final Injector injector = Guice.createInjector(new JerseyServletModule() {! ! ! @Override! ! ! protected void configureServlets() {! ! ! ! bind(Echo.class);! ! ! ! bind(Status.class);! ! ! ! bind(Signin.class);! ! ! ! bind(ServletContainer.class).in(Singleton.class);! ! ! ! serve("/rest/*").with(GuiceContainer.class);! ! ! }! ! }, new JpaPersistModule("dbUnit"));! ! injector.getInstance(JPAInitializer.class);! ! return injector;! }}
ServletContextListener.java
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(c) copyright 2013 nuboat in wonderland
import com.google.inject.Inject;import com.google.inject.Singleton;import com.google.inject.persist.PersistService;
@Singletonpublic final class JPAInitializer {
! @Inject! public JPAInitializer(final PersistService service) {! ! service.start();! }
}
JPAInitializer.java
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(c) copyright 2013 nuboat in wonderland
import javax.ws.rs.GET;import javax.ws.rs.Path;import javax.ws.rs.core.Response;
@Path("/status")public final class Status {
! @GET! public final Response getJson() {! ! return Response.status(200).entity("live!").build();! }
}
Status.java
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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.slf4j.Logger;import org.slf4j.LoggerFactory;
@Path("/echo")public final class Echo {
! private static final Logger LOG = LoggerFactory.getLogger(Echo.class);
! @GET! @Path("/{param}")! @Produces(MediaType.APPLICATION_JSON)! public final Response getJson(@PathParam("param") final String msg) {! ! final String echomsg = msg.length() <= 24 ? msg : msg.substring(0, 24);
! ! LOG.info("Echo: {}", echomsg);! ! return Response.status(200).entity(echomsg).build();! }
}
Echo.java
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(c) copyright 2013 nuboat in wonderland
import com.google.inject.Inject;import com.thjug.facade.SigninFacade;import javax.ws.rs.FormParam;import javax.ws.rs.POST;import javax.ws.rs.Path;import javax.ws.rs.core.Response;import org.slf4j.Logger;import org.slf4j.LoggerFactory;
@Path("/signin")public final class Signin {! private static final Logger LOG = LoggerFactory.getLogger(Signin.class);! @Inject! private SigninFacade facade;! @POST! public final Response getJson(! ! ! @FormParam("username") final String username,! ! ! @FormParam("password") final String password) {! ! LOG.info("Username: {} Password: {}", username, password);! ! String result;! ! try {! ! ! result = (facade.authen(username, password)) ? "pass" : "fail";! ! } catch (final Exception e) {! ! ! LOG.error(e.getMessage(), e);! ! ! result = e.getMessage();! ! }! ! return Response.status(200).entity(result).build();! }}
Signin.java
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public enum Enable {
! T('T', "True"),! F('F', "False");! private char id;! private String text;
! private Enable(final char id, final String text) {! ! this.id = id;! ! this.text = text;! }
! public char getId() {! ! return id;! }
! public String getText() {! ! return text;! }}
Enum - Enable.java
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@Entity@Table(name = "ACCOUNT")@NamedQueries({! @NamedQuery(name = Account.countAll, query = "SELECT COUNT(a) FROM Account a"),! @NamedQuery(name = Account.findByUsername, query = "SELECT a FROM Account a WHERE UPPER(a.username) = ?1"),})public class Account implements Serializable {
! private static final long serialVersionUID = 1L;! public static final String countAll = "Account.countAll";! public static final String findByUsername = "Account.findByUsername";
! @Id! @Basic(optional = false)! @NotNull! @Column(name = "id", nullable = false)! @SequenceGenerator(name = "account_seq_gen", sequenceName = "account_id_seq", allocationSize = 1)! @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "account_seq_gen")! private Integer id;
.......! @Basic(optional = false)! @NotNull! @Size(min = 1, max = 64)! @Column(name = "username")! private String username;
......
Entity - Account.java
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@Inject! private transient Provider<EntityManager> provider;
! public T create(final T entity) {! ! getEntityManager().persist(entity);! ! return entity;! }
! public T find(final Object id) {! ! return getEntityManager().getReference(entityClass, id);! }
! public T edit(final T entity) {! ! return getEntityManager().merge(entity);! }
! public void remove(final T entity) {! ! getEntityManager().remove(getEntityManager().merge(entity));! }
! protected EntityManager getEntityManager() {! ! return this.provider.get();! }
CRUD - Create Read Update Delete
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! protected <S> S findOne(final String namequery, final Object... param) {! ! final Query q = getEntityManager().createNamedQuery(namequery);! ! for (int i = 0; i < param.length; i++) {! ! ! q.setParameter(i + 1, param[i]);! ! }! ! return (S) q.getSingleResult();! }! protected List<T> findAll(final String namequery, final Object... param) {! ! final Query q = getEntityManager().createNamedQuery(namequery);! ! for (int i = 0; i < param.length; i++) {! ! ! q.setParameter(i + 1, param[i]);! ! }! ! return q.getResultList();! }! protected List<T> findRange(final String namequery, final int offset, final int limit, final Object... param) {! ! final Query q = getEntityManager().createNamedQuery(namequery);! ! for (int i = 0; i < param.length; i++) {! ! ! q.setParameter(i + 1, param[i]);! ! }! ! if (limit != 0) {! ! ! q.setMaxResults(limit);! ! }! ! if (offset != 0) {! ! ! q.setFirstResult(offset);! ! }! ! return q.getResultList();! }
AbstractService<T>.java
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Facade Pattern
http://java.dzone.com/articles/design-patterns-uncovered-1
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Facade Pattern in Project
Signin SigninFacade
SigninService
HistoryService
Client Facade
Class 1
Class 2
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import com.google.inject.ImplementedBy;import com.thjug.facade.impl.SigninFacadeImpl;
@ImplementedBy(value = SigninFacadeImpl.class)public interface SigninFacade {
! public boolean authen(final String username, final String password)! ! ! throws Exception;}
SigninFacade.java
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(c) copyright 2013 nuboat in wonderland
import com.thjug.facade.*;import com.google.inject.Inject;import com.google.inject.persist.Transactional;import com.thjug.entity.Account;import com.thjug.service.AccountService;import org.apache.shiro.crypto.hash.Sha256Hash;
public class SigninFacadeImpl implements SigninFacade {
! @Inject! AccountService accountService;! @Inject! HistoryService historyService;
! @Override! @Transactional! public boolean authen(final String username, final String password)! ! ! throws Exception {! ! final Account account = accountService.findByUsername(username.toUpperCase());! ! final String cyphertext = new Sha256Hash(password).toHex();! ! final boolean result = (cyphertext.equals(account.getPasswd())) ? true : false;
! ! historyService.keepLog("authen", account, Boolean.toString(result));! ! return result;! }}
SigninFacadeImpl.java
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(c) copyright 2013 nuboat in wonderland
import com.thjug.entity.Account;
public class AccountService extends AbstractService<Account> {
! public AccountService() {! ! super(Account.class);! }
! public Account findByUsername(final String username) throws Exception {! ! return findOne(Account.findByUsername, username);! }
}
AccountService.java
Sunday, June 16, 13
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(c) copyright 2013 nuboat in wonderland
import com.thjug.entity.Account;import com.thjug.entity.History;
public class HistoryService extends AbstractService<History> {
! public HistoryService() {! ! super(History.class);! }
! public void keepLog(final String action, final Account account, final String result) {! ! // TODO! }
}
HistoryService.java
Sunday, June 16, 13
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(c) copyright 2013 nuboat in wonderland
import com.google.inject.Guice;import com.google.inject.Injector;import com.google.inject.persist.jpa.JpaPersistModule;import com.thjug.base.JPAInitializer;
public abstract class AbstractFacadeNGTest {
! protected final Injector injector;
! public AbstractFacadeNGTest() {! ! injector = Guice.createInjector(new JpaPersistModule("dbUnit"));! ! injector.getInstance(JPAInitializer.class);! }
}
AbstractFacadeNGTest.java
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(c) copyright 2013 nuboat in wonderland
import static org.testng.Assert.*;import org.testng.annotations.Test;
public class SigninFacadeImplNGTest extends AbstractFacadeNGTest {
! @Test! public void testAuthen() throws Exception {! ! String username = "admin";! ! String password = "password";! ! SigninFacadeImpl instance = injector.getInstance(SigninFacadeImpl.class);
! ! boolean expResult = true;! ! boolean result = instance.authen(username, password);! ! assertEquals(result, expResult);! }}
SigninFacadeImplNGTest.java
Sunday, June 16, 13
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Source Code Availableon
https://github.com/nuboat/Services
git clone [email protected]:nuboat/Services.git
(c) copyright 2013 nuboat in wonderlandSunday, June 16, 13
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THANK YOU :)
(c) copyright 2013 nuboat in wonderlandSunday, June 16, 13