в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

Admin: 1 версия

2010-05-31T14:43:59Z

1 версия

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== javax.ejb.Stateless ==



<source lang="java">

File: Employee.java
import javax.persistence.Entity;
import javax.persistence.EntityListeners;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.PostRemove;
@Entity
public class Employee implements java.io.Serializable {
private int id;
private String firstName;
private String lastName;
@Id
@GeneratedValue
public int getId() {
return id;
}

@PostRemove
public void postRemove()
{
System.out.println("@PostRemove");
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String first) {
this.firstName = first;
}
public String getLastName() {
return lastName;
}
public void setLastName(String last) {
this.lastName = last;
}
}

File: EmployeeService.java
import javax.ejb.Stateless;
import javax.transaction.TransactionManager;
@Stateless
public class EmployeeService implements EmployeeServiceLocal, EmployeeServiceRemote {
public EmployeeService() {
}

@JndiInjected("java:/TransactionManager")
TransactionManager tm;
public void doAction() throws Exception {
System.out.println("Is there a transaction: " + (tm.getTransaction() != null));
}
}

File: EmployeeServiceLocal.java

import java.util.Collection;
import javax.ejb.Local;
@Local
public interface EmployeeServiceLocal {
public void doAction() throws Exception;

}

File: EmployeeServiceRemote.java

import java.util.Collection;
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote{
public void doAction() throws Exception;
}

File: JndiInjected.java

import java.lang.annotation.*;
@Target({ElementType.METHOD, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface JndiInjected {
String value();
}

File: JndiInjector.java

import java.lang.reflect.*;
import javax.ejb.*;
import javax.interceptor.*;
import javax.naming.*;
import javax.annotation.PostConstruct;
public class JndiInjector {
@PostConstruct
public void jndiInject(InvocationContext invocation) {
Object target = invocation.getTarget();
Field[] fields = target.getClass().getDeclaredFields();
Method[] methods = target.getClass().getDeclaredMethods();
// find all @JndiInjected fields methods and set them
try {
InitialContext ctx = new InitialContext();
for (Method method : methods) {
JndiInjected inject = method.getAnnotation(JndiInjected.class);
if (inject != null) {
Object obj = ctx.lookup(inject.value());
method.setAccessible(true);
method.invoke(target, obj);
}
}
for (Field field : fields) {
JndiInjected inject = field.getAnnotation(JndiInjected.class);
if (inject != null) {
Object obj = ctx.lookup(inject.value());
field.setAccessible(true);
field.set(target, obj);
}
}
invocation.proceed();
} catch (Exception ex) {
throw new EJBException("Failed to execute @JndiInjected", ex);
}
}
}

File: Main.java
import java.util.Date;
import javax.naming.InitialContext;

public class Main {
public static void main(String[] a) throws Exception {
EmployeeServiceRemote service = null;
// Context compEnv = (Context) new InitialContext().lookup("java:comp/env");
// service = (HelloService)new InitialContext().lookup("java:comp/env/ejb/HelloService");
service = (EmployeeServiceRemote) new InitialContext().lookup("EmployeeService/remote");

service.doAction();
}
}

File: jndi.properties
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099

</source>

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Java by API/javax.ejb/Stateless - История изменений

в 17:43, 31 мая 2010

Admin: 1 версия