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2010-06-01T06:50:25Z

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в 18:01, 31 мая 2010

2010-05-31T18:01:45Z

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== EJB Tutorial from JBoss: Injection ==



<source lang="java">

File: CalculatorBean.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.injection.bean;
import javax.ejb.Stateless;
@Stateless
public class CalculatorBean implements Calculator
{
public int add(int x, int y)
{
return x + y;
}
public int subtract(int x, int y)
{
return x - y;
}
}

File: ShoppingCart.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.injection.bean;
import java.util.HashMap;
import javax.ejb.Remove;
public interface ShoppingCart
{
void buy(String product, int quantity);
HashMap<String, Integer> getCartContents();
@Remove void checkout();
}

File: ShoppingCartBean.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.injection.bean;
import java.util.HashMap;
import javax.ejb.EJB;
import javax.ejb.Remote;
import javax.ejb.Remove;
import javax.ejb.Stateful;

@Stateful
@Remote(ShoppingCart.class)
public class ShoppingCartBean implements ShoppingCart, java.io.Serializable
{
private HashMap<String, Integer> cart = new HashMap<String, Integer>();
@EJB
private Calculator calculator;

private Calculator set;
@EJB(beanName="CalculatorBean")
public void setCalculator(Calculator c)
{
set = c;
}

public void buy(String product, int quantity)
{
if (cart.containsKey(product))
{
int currq = cart.get(product);
currq = calculator.add(currq, quantity);
cart.put(product, currq);
}
else
{
cart.put(product, quantity);
}
}
public HashMap<String, Integer> getCartContents()
{
return cart;
}
@Remove
public void checkout()
{
System.out.println("To be implemented");
}
}

File: Calculator.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.injection.bean;
public interface Calculator
{
int add(int x, int y);
int subtract(int x, int y);
}
File: Client.java
/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.tutorial.injection.client;

import org.jboss.tutorial.injection.bean.ShoppingCart;
import javax.naming.InitialContext;
import java.util.HashMap;
/**
* Comment
*
* @author

== Field Injection ==



<source lang="java">

File: AnotherBean.java
import javax.ejb.Stateless;
@Stateless
public class AnotherBean implements AnotherBeanLocal {
public void doAnother(){
System.out.println("from another bean");
}
}

File: AnotherBeanLocal.java

public interface AnotherBeanLocal {
public void doAnother();
}

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: EmployeeBean.java
import javax.annotation.Resource;
import javax.ejb.EJB;
import javax.ejb.SessionContext;
import javax.ejb.Stateless;
@Stateless
public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {
@EJB AnotherBeanLocal a;
public EmployeeBean() {
}
public void doAction() {
System.out.println("doAction");
a.doAnother();
}
}

File: EmployeeServiceLocal.java
import java.util.Map;
import javax.ejb.Local;

@Local
public interface EmployeeServiceLocal {
public void doAction();
}

File: EmployeeServiceRemote.java

import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote {
public void 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

File: Main.java
import javax.ejb.EJB;
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("EmployeeBean/remote");
service.doAction();
}
}

</source>



== Setter Injection ==



<source lang="java">

File: AnotherBean.java
import javax.ejb.Stateless;
@Stateless
public class AnotherBean implements AnotherBeanLocal {
public void doAnother(){
System.out.println("from another bean");
}
}

File: AnotherBeanLocal.java

public interface AnotherBeanLocal {
public void doAnother();
}

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: EmployeeBean.java
import javax.annotation.Resource;
import javax.ejb.EJB;
import javax.ejb.SessionContext;
import javax.ejb.Stateless;
@Stateless
public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {
private AnotherBeanLocal a;
@EJB
public void setAuditService(AnotherBeanLocal audit) {
this.a = audit;
}
public EmployeeBean() {
}
public void doAction() {
System.out.println("doAction");
a.doAnother();
}
}

File: EmployeeServiceLocal.java
import java.util.Map;
import javax.ejb.Local;

@Local
public interface EmployeeServiceLocal {
public void doAction();
}

File: EmployeeServiceRemote.java

import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote {
public void 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

File: Main.java
import javax.ejb.EJB;
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("EmployeeBean/remote");
service.doAction();
}
}

</source>



== Use EJB To Reference Another EJB In One EJB ==



<source lang="java">

File: AnotherBeanLocal.java

public interface AnotherBeanLocal {
public void doAnother();
}

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: EmployeeBean.java
import javax.ejb.EJB;
import javax.ejb.EJBException;
import javax.ejb.Stateless;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
@Stateless
@EJB(name = "audit", beanInterface = AnotherBeanLocal.class)
public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {
public EmployeeBean() {
}
public void doAction() {
System.out.println("doAction");
try {
Context ctx = new InitialContext();
AnotherBeanLocal a = (AnotherBeanLocal) ctx.lookup("java:comp/env/audit");
a.doAnother();
} catch (NamingException e) {
throw new EJBException(e);
}
}
}

File: EmployeeServiceLocal.java
import java.util.Map;
import javax.ejb.Local;

@Local
public interface EmployeeServiceLocal {
public void doAction();
}

File: EmployeeServiceRemote.java

import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote {
public void doAction();
}

File: AnotherBean.java
import javax.ejb.Stateless;
@Stateless
public class AnotherBean implements AnotherBeanLocal {
public void doAnother(){
System.out.println("from another bean");
}
}

File: Main.java
import javax.ejb.EJB;
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("EmployeeBean/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>



== Use Injected Context To Loopup An other EJB ==



<source lang="java">

File: AnotherBeanLocal.java

public interface AnotherBeanLocal {
public void doAnother();
}

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: EmployeeBean.java
import javax.annotation.Resource;
import javax.ejb.EJB;
import javax.ejb.SessionContext;
import javax.ejb.Stateless;
@Stateless
@EJB(name = "audit", beanInterface = AnotherBeanLocal.class)
public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {
@Resource SessionContext context;
public EmployeeBean() {
}
public void doAction() {
System.out.println("doAction");
AnotherBeanLocal a = (AnotherBeanLocal) context.lookup("audit");;
a.doAnother();
}
}

File: EmployeeServiceLocal.java
import java.util.Map;
import javax.ejb.Local;

@Local
public interface EmployeeServiceLocal {
public void doAction();
}

File: EmployeeServiceRemote.java

import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote {
public void doAction();
}

File: AnotherBean.java
import javax.ejb.Stateless;
@Stateless
public class AnotherBean implements AnotherBeanLocal {
public void doAnother(){
System.out.println("from another bean");
}
}

File: Main.java
import javax.ejb.EJB;
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("EmployeeBean/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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Admin: 1 версия

в 18:01, 31 мая 2010