Enterprise Java Web Application Frameworks Sample Stack Implementation

Enterprise Java Web Application Frameworks & Sample Stack Implementation Mert ÇALIŞKAN mcaliskan@stm.com.tr STM Inc. 2009

Who am I? • The Software Plumber :) SCJP certiﬁed dude bla bla... • Open Source Evangelist Founder & Author of various Open Source Projects • Member of MyFaces Community OpenLogic Expert Community Member

Agenda • The aim: Enterprise Java WebApp Framework • Which stack to choose? • • The Stack • Questions are welcome anytime..!

The aim: Enterprise WebApp Framework • MVC pattern • Quality & Competency of “The Stack” • Performance & Scalability • Learning Curve & Development Speed ! don’t let cutting edge turn into bleeding edge... release early & release often..! • Community Factor & Open Source support (forums- mailing lists & etc.)

Which stack to choose? UI Controller/Dep.Inj. JSF Struts Spring Guice HiveMind Spring MVC WebWork ZK picoContainer XWork Wicket Tapestry GWT Model/Persistence Layer Echo3 Cocoon Hibernate iBatis Integration Toplink KODO Apache CXF Apache Axis2 IDE EclipseLink Eclipse IntelliJ Spring WS IDEA JDeveloper NetBEANS

• It’s nothing new! not “yet another java framework” • It’s a stack demonstration with OSS • Released on 01.2009 • http://code.google.com/p/mesir • 2000+ downloads

DOMAIN MODEL AddressBook Contact id id 1 0..* text name creationDate email contacts phone

THE STACK VIEW MAVEN JSF ECLIPSE FACELETS ORCHESTRA Apache CXF MODEL CONTROLLER JPA HIBERNATE H.SEARCH SPRING H.VALIDATOR with SecuRITY ENVERS

JSF-1 • A standard (v1.2_13 and v2.0.1 FCS) • A component oriented & event-driven framework • Binding makes JSF Powerful Bind a bean’s variable to component <h:inputText value=“#{person.name}” /> Bind a method to the action component <h:commandButton action=“#{personSavePage.savePerson}” /> • Conversion & Validation no hassle with java.util.Date extensible - write your own converter & validator

JSF-2 • 3rd Party Ajaxiﬁed Frameworks PrimeFACES - Crazy Turks RichFACES - JBoss IceFACES - Sun ADFFaces - Oracle • IDE Support (Eclipse - NetBeans - JDeveloper) • Everything’s gonna be alright with JSF 2.0 :)

FACELETS • ViewHandler created for JSF • mixing JSF + JSP for JSF 1.x • well balanced HTML : xhtml • Templating • Composite Components

SPRING-1 • Dependency Injection & IoC with XML and annotations • JEE ( JMS, EJBs, JCA ...) • AOP • ORM Integration, DAO Support tx management, entityManager

SPRING-2 ORM DAO Web Hibernate Spring JDBC JPA JEE Spring WEB MVC TopLink Framework Transaction JDO Integration management JMX OJB Struts iBatis JMS Tapestry JCA JSF Remoting JSPs EJB Velocity Email FreeMarker AOP JasperReports Excel Spring Portlet MVC Spring AOP AspectJ Integration

SPRING-3 <context:property-placeholder location="classpath:application.properties"> ... <context:component-scan base-package="tr.mesir" /> ... <tx:annotation-driven /> ... <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" destroy- method="close"> <property name="driverClassName" value="${database.driver}"/> <property name="url" value="${database.uri}"/> <property name="username" value="${database.username}"/> <property name="password" value="${database.password}"/> </bean> ... <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory" />

SPRING-4 @Service("addressBookService") public class AddressBookServiceImpl implements AddressBookService { ... @Autowired private AddressBookDAO addressBookDAO; ... } @Repository public class AddressBookDAOImpl implements AddressBookDAO { ... @PersistenceContext protected EntityManager entityManager; ... }

MyFaces ORCHESTRA • Conversation Scoped beans & Conversation Scoped Persistence Contexts LazyInitializationException or NonUniqueObjectException • Heavily built-on Spring Framework

JPA-1 • Standard (Java EE 5.0) object/relational mapping and persistent management interface • Support from different vendors hibernate - toplink - eclipselink - kodo ... • Enhanced Query Langugage (JPQL)

JPA-2 @Entity public class AddressBook extends BaseObject { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; @OneToMany(cascade={CascadeType.ALL}) @Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN) private List<Contact> contacts = new ArrayList<Contact>(); }

JPA-3 Some DAO code: public AddressBook loadById(Long id) { return entityManager.find(AddressBook.class, id); } public void save(AddressBook addressBook) { entityManager.persist(addressBook); } public List<String> findAllTitles() { return entityManager.createQuery("select ab.title from AddressBook ab").getResultList(); }

HIBERNATE-1 • Object / Relational Mapping framework • No hassle with result set handling object conversion and SQL, well almost for SQL :) • Support for any DB with dialects Oracle, MySQL, PostgreSQL, HSQL, DB2, Sybase and many more....

Hibernate Search • Bringing full text search engine to the persistence domain model e.g. : amazon search • Apache Lucene™ under the hood • Lucene Directory File - DB - in mem • JPA Triggered Event System Persist - Update - Delete

H.S. - How To Use • Conﬁguration Transparent with JPA (hibernate entity manager) (hibernate annotations) • Annotation Based @Indexed @Field(store, index) @IndexedEmbedded .....

H.S. - Example @Entity @Indexed public class AddressBook extends BaseObject { @Field(index=Index.TOKENIZED, store=Store.NO) private String title; @OneToMany(cascade={CascadeType.ALL}) @Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN) @IndexedEmbedded private List<Contact> contacts = new ArrayList<Contact>(); .... }

H.S. - Example @SuppressWarnings("unchecked") public List<AddressBook> findByWord(String searchWord) throws ParseException { // Since contacts list is declared as @IndexedEmbedded inside AddressBook, // we can search through the name or email of a contact also. MultiFieldQueryParser parser = new MultiFieldQueryParser(new String[] { "title", "contacts.name", "contacts.email" }, new StandardAnalyzer()); Query query = parser.parse(searchWord); FullTextQuery ftq = getFullTextEntityManager().createFullTextQuery( query, AddressBook.class); return ftq.getResultList(); }

HIBERNATE VALIDATOR-1 • Reference implementation for JSR 303: Bean Validation • DRY (Don’t Repeat Yourself) express your domain constraints once..! property2DDLSchema • annotation-based @NotNull @NotEmpty @Length(min=, max=) ........ @Email @Pattern @Valid ........ • custom validators

HIBERNATE VALIDATOR-2 @Field @NotEmpty(message="Name should not be empty") @Length(min=4, max=40) private String name; @Field @NotEmpty(message="Email should not be empty") @Email private String email;

HIBERNATE ENVERS-1 • Versioning for JPA entities • A part of Hibernate with Hib.3.5 • Simple to implement with annotations @Audited .... • Querying on Revisions, Entity at Revisions

HIBERNATE ENVERS-2 Entities R id=”1” id=”4” e data=”x” data=”p” v id=”2” id=”3” i data=”a” data=”x” s id=”1” id=”2” i data=”y” data=”b” o n id=”2” id=”4” data=”c” data=”r” s

HIBERNATE ENVERS-3 @Entity @Indexed @Audited public class Contact extends BaseObject { @Field @Versioned private String name; }

Apache CXF-1 • open-source services framework • annotation driven • JAX-WS & JAX-RS compliant • soap + rest • xml + json

Apache CXF-2 @Component("addressBookWebService") @WebService public class AddressBookWebService { @Autowired private AddressBookService addressBookService; @WebMethod public List<String> allAddressBookTitles() { return addressBookService.findAllTitles(); } } spring configuration: <jaxws:endpoint id="addressBookWS" implementor="#addressBookWebService" address="/addressbook" />

Apache CXF-3 http://localhost:8080/mesir/ws/addressbook/allAddressBookTitles

MAVEN • Stop “building the build” and focus on building the application...! • A uniform build system... • Project Object Model (POM) • Guidelines for best practices while doing development (TDD - Cont. Int. & etc.)

MAVEN - The POM-1 <project ...> <modelVersion>4.0.0</modelVersion> <groupId>tr.mc</groupId> <artifactId>mesir</artifactId> <packaging>war</packaging> <version>1.0-SNAPSHOT</version> <name>mesir</name> <url>http://code.google.com/p/mesir</url> <description>Skeleton project for java based web applications</description> ... ... ... ... </project>

MAVEN - The POM-2 <dependencies> ... <dependency> <groupId>org.springframework</groupId> <artifactId>spring</artifactId> <version>2.5.6</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>2.5.6</version> <scope>test</scope> </dependency> ... </dependencies>

MAVEN - The POM-3 <repositories> <repository> <id>mesir-repo</id> <url>http://mesir.googlecode.com/svn/trunk/mavenrepo</url> </repository> <repository> <id>jboss</id> <url>http://repository.jboss.com/maven2</url> </repository> <repository> <id>apache-snapshot</id> <url>http://people.apache.org/repo/m2-snapshot-repository</url> </repository> </repositories>

ECLIPSE-1 • Universal toolset for Development • Open Source IDE • Extensible architecture based on plugins • Speciﬁed mostly on Java but development language is independent... CDT - PHP - Cobol • Plugins used while developing mesir: subclipse m2eclipse

ECLIPSE-2 •

Thank you... http://www.jroller.com/mert http://www.twitter.com/mertcaliskan

Enterprise Java Web Application Frameworks Sample Stack Implementation

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