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HelloSingleton.java
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HelloSingleton.java
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/*
* Copyright (c) 2010, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.acme.ejb.impl;
import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;
import jakarta.annotation.Resource;
import jakarta.ejb.DependsOn;
import jakarta.ejb.SessionContext;
import jakarta.ejb.Singleton;
import jakarta.ejb.Startup;
import jakarta.inject.Inject;
import jakarta.persistence.EntityManagerFactory;
import jakarta.persistence.PersistenceUnit;
import com.acme.ejb.api.Hello;
import com.acme.util.TestDatabase;
import com.acme.util.TestDependentBeanInLib;
import com.acme.util.TestSessionScopedBeanInLib;
import com.acme.util.UtilInLibDir;
@Singleton
@Startup
@DependsOn("Singleton4")
public class HelloSingleton implements Hello {
@Resource
SessionContext sessionCtx;
@PersistenceUnit(unitName = "pu1")
@TestDatabase
private EntityManagerFactory emf;
@Inject
TestDependentBeanInLib tdbil;
@Inject
TestSessionScopedBeanInLib tssil;
@PostConstruct
private void init() {
System.out.println("HelloSingleton::init()");
String appName;
String moduleName;
appName = (String) sessionCtx.lookup("java:app/AppName");
moduleName = (String) sessionCtx.lookup("java:module/ModuleName");
System.out.println("AppName = " + appName);
System.out.println("ModuleName = " + moduleName);
}
public String hello() {
System.out.println("HelloSingleton::hello()");
String res = testEMF();
if (!res.equals(""))
return res;
res = testInjectionOfBeansInLibDir();
if (!res.equals(""))
return res;
UtilInLibDir uilb = new UtilInLibDir();
if (!(uilb.add(1, 2) == 3)) {
return "Can't use utility class in library directory";
}
return ALL_OK_STRING;
}
private String testInjectionOfBeansInLibDir() {
if (tdbil == null)
return "Injection of Dependent Bean in lib into an EJB in that ear failed";
if (tssil == null)
return "Injection of SessionScoped Bean in lib into an EJB in that ear failed";
return "";
}
private String testEMF() {
if (emf == null)
return "EMF injection failed, is null in Singleton EJB";
if (emf.createEntityManager() == null)
return "Usage of EMF failed in Singleton EJB";
return "";
}
@PreDestroy
private void destroy() {
System.out.println("HelloSingleton::destroy()");
}
}