Spring

Spring

• 1.
  mustafa daşgınmdasgin.blogspot.commustafa.dasgin@prime.com.trSpring
• 2.
  Expert One-on-One J2EEDesign and Development (Rod Johnson)Sıradan Java sınıflarına yetenekler kazandırır.Transactions, Monitoring, Concurrency, RemotingBağımlılık aktarımını üstlenirModüler yapılıCoreVeri erişimi/entegrasyonuWebAOPTestSpring’e Giriş
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  Spring Modülleri
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  Konfigürasyona göre “bean”yaratıp yönetimini üstlenirXML tabanlıNotlandırma (Annotation) tabanlıJava tabanlıorg.springframework.context.ApplicationContext ClassPathXmlApplicationContextFileSystemXmlApplicationContextXmlWebApplicationContextAnnotationConfigApplicationContextAnnotationConfigWebApplicationContextIoC Container
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  IoC Container (Devam)
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  XML Tabanlı Konfigürasyon<beansxmlns=“...><bean id=“userService" class=“com.prime.UserServiceImpl"> <property name=“userDao" ref=“userDao"/><!– diger ek tanımlamalar --></bean><bean id=“userDao" class=“com.prime.UserDaoImpl"><!– diger ek tanımlamalar --></bean></beans
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  Notlandırma Tabanlı Konfig.<beansxmlns=“...><context:component-scan base-package="org.example"/></beans>@Service //@Component@Scope("prototype")publicclassSimpleMovieLister { @Autowired//@ResourceprivateMovieFindermovieFinder;publicSimpleMovieLister(MovieFindermovieFinder) { this.movieFinder= movieFinder;}}@Repository //@ComponentpublicclassJpaMovieFinderimplementsMovieFinder { // implementation elided for clarity}
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  AnnotationConfigWebApplicationContextCGLIB jar gerekliJavaTabanlı Konfigürasyon@ConfigurationpublicclassAppConfig{@Bean(name = "myFoo",initMethod= "init")@Scope("prototype")publicFoofoo() { returnnewFoo(bar());} @Bean publicBar bar() { returnnewBar(); } }
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  IoC Container tarafındanyaratılıp, bağımlılıkları ve yaşam döngüsü yönetilen basit Java nesneleri (POJO)Tanımlanırken;Sınıfıid ve/veya ismiScope değeriBağımlılıklarıYaşam döngüsü metotları belirtilebilir.Container 3 farklı yöntemle beanleri yaratır:Sınıfın yapıcısı (constructor)static factory metotinstance factory metotBean Nedir?
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  Yapıcı ileStatic Factorymetot ileBean Yaratma Yöntemleri<bean id="exampleBean" class="examples.ExampleBean"/><bean id="clientService" class="examples.ClientFactoryService“factory-method="createClient"/>publicclassClientFactoryService { publicstaticClientServicecreateClient() { new ClientService(); }}
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  Instance Factory metotileBean Yaratma Yöntemleri (Devam)<bean id="serviceLocator" class="examples.DefaultServiceLocator“/><bean id="clientService“factory-bean="serviceLocator“factory-method="createClientServiceInstance"/>publicclassDefaultServiceLocator { publicClientServicecreateClientServiceInstance() { returnnew ClientService();}}
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  Bean Scopeları<web-app>... <listener><listener-class>org.springframework.web.context.request.RequestContextListener</listener-class></listener> ...</web-app>
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  Singleton Scope
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  Prototype Scope
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  org.springframework.beans.factory.InitializingBeanorg.springframework.beans.factory.DisposableBeanBean Yaşam Döngüsü<beanid="exampleBean" class="examples.ExampleBean"/>publicclassExampleBeanimplementsInitializingBean, DisposableBean{ publicvoidafterPropertiesSet() {// do some initialization work}publicvoid destroy() { // do some destruction work}}
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  init-methoddestroy-methodBean Yaşam Döngüsü(Devam)<bean id="exampleBean" class="examples.ExampleBean" init-method="init“ destroy-method=“cleanup”/>publicclassExampleBean { publicvoid init() { // do some initialization work} publicvoid cleanup() { // do some destruction work}}
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  @PostConstruct@PreDestroyBean Yaşam Döngüsü(Devam)publicclassExampleBean {@PostConstructpublicvoidinit() { //...} @PreDestroypublicvoidcleanup() { //...}}
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  Yapıcı ile AktarımBağımlılıkAktarımıpackagex.y; publicclassFoo { publicFoo(Bar bar, Bazbaz) { // ...}}<beans> <bean id="foo" class="x.y.Foo"><constructor-arg ref="bar"/><constructor-arg ref="baz"/></bean><bean id="bar" class="x.y.Bar"/><bean id="baz" class="x.y.Baz"/></beans>
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  Yapıcı ile Aktarım(Devam..)Bağımlılık Aktarımı (Devam)<bean id="exampleBean" class="examples.ExampleBean"> <constructor-arg index="0" value="7500000"/><constructor-arg index="1" value="42"/></bean><bean id="exampleBean" class="examples.ExampleBean"> <constructor-arg name="years" value="7500000"/><constructor-arg name="ultimateanswer" value="42"/> </bean>
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  Setter Metotları ileAktarımBağımlılık Aktarımı (Devam..)<bean id="exampleBean" class="examples.ExampleBean“><property name="beanOne"><ref bean="anotherExampleBean"/></property><property name="beanTwo" ref="yetAnotherBean"/><property name="integerProperty" value="1"/></bean><bean id="anotherExampleBean" class="examples.AnotherBean"/> <bean id="yetAnotherBean" class="examples.YetAnotherBean"/>
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  Primitive Değerlerin Aktarımıpackageexamples;publicclassExampleBean{ privateintyears;String ultimateAnswer; publicExampleBean(int years, String ultimateAnswer) {this.years= years;this.ultimateAnswer= ultimateAnswer;}}<bean id="exampleBean" class="examples.ExampleBean"> <constructor-arg type="int" value="7500000"/> <constructor-arg type="java.lang.String" value="42"/> </bean>
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  Collection Yapıların Aktarımı<beanid="moreComplexObject" class="example.ComplexObject"><!-- java.util.Properties --><property name="adminEmails"><props><prop key="administrator">admin@expl.org</prop><prop key="support">support@expl.org</prop><prop key="dev">development@expl.org</prop> </props></property> <!– java.util.List<property name="someList"><list><value>a list element</value><ref bean="myDataSource" /></list></property>
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  Collection Yapılarının Akt.(Devam)<!-- java.util.Map<property name="someMap"><map><entry key="entry" value="just some string"/><entry key ="a ref" value-ref="myDataSource"/></map></property><!-- java.util.Set --><property name="someSet"><set><value>just some string</value><ref bean="myDataSource" /></set></property></bean>
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  Null ve BoşString Aktarımı<!-- Boş String --><bean class="ExampleBean"><property name="email" value=""/></bean><!-- Null --><bean class="ExampleBean"><property name="email"><null/></property></bean>
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  Modları:byNamebyTypeconstructorPrimitive tipler içinkullanılamazAynı tip değerinde birden fazla aday bean varsa hata oluşur.Autowire<bean id=“userService” class=“services.UserService” autowire=“byName”/>
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  web.xmlJSF ile Entegrasyon<listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>...<context-param><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/applicationContext.xml</param-value></context-param>
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  faces-config.xmlApplicationContext erişimi:JSF ileEntegrasyon (Devam)<faces-config><application><el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>... </application></faces-config>ApplicationContextctx = FacesContextUtils.getWebApplicationContext(FacesContext.getCurrentInstance());
• 28.
  Farklı transaction APIleri(JTA, JDBC, Hibernate, JPA) üzerine ortak bir model sunar.Transaction gerçekleştirimi değişse bile kodta değişiklik yapmaya gerek yok.Programlama veya tanımlama ile transaction tanımları yapılabilir.Basit APISpring Transaction Desteği
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  JDBC – DataSourceTransactionManagerJTA– JtaTransactionManagerHibernate – HibernateTransactionManagerJPA - JpaTransactionManagerPlatformTransactionManager<bean id=“txManager" class="org.springframework.orm.jpa.JpaTransactionManager“<property name=“entityManagerFactory” ref="entityManagerFactory"/></bean><bean id=“entityManagerFactory“class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name=“dataSource” ref=“dataSource”/> ...</bean>
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  XML ileTransaction Tanımlama<aop:config><aop:pointcut id="serviceOperation“expression="execution(* x.y.service..*Service.*(..))"/> <aop:advisorpointcut-ref="serviceOperation“advice-ref="txAdvice"/></aop:config><bean id="fooService" class="x.y.service.DefaultFooService"/><bean id="anotherService" class="org.xyz.SomeService"/><tx:advice id="txAdvice“transaction-manager="txManager" ><tx:attributes><tx:method name="get*" read-only="true"/><tx:method name="*"/></tx:attributes>
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  Notlandırma ile TransactionTanım.@Transactional(readOnly = true)publicclassDefaultFooServiceimplementsFooService{publicFoogetFoo(String fooName) { // do something } @Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW)publicvoidupdateFoo(Foofoo) { // do something } }<bean id="fooService" class="x.y.service.DefaultFooService"/> <tx:annotation-driven transaction-manager="txManager"/>
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  LocalEntityManagerFactoryBeanEntityManagerFactory’i JNDI’dan elde etmeLocalContainerEntityManagerFactoryBeanJPADesteği
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  JPA Desteği (Devam)<beanid="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"><property name="dataSource" ref="dataSource"/><property name="persistenceUnitName" value="simpleJpa"/><property name="jpaVendorAdapter"><bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"><property name="showSql" value="true"/><property name="generateDdl" value="true"/><property name="database" value="HSQL"/></bean></property></bean>
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  Spring Reference Documantationhttp://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/Kaynak