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ServiceLocator.java
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ServiceLocator.java
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/*
* Copyright 2014, Red Hat, Inc. 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.zanata.util;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import org.jboss.seam.Component;
import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.AutoCreate;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.annotations.intercept.BypassInterceptors;
/**
* Service Locator for Seam components, intended for obtaining short-lived
* components to use inside methods of long-lived components, such as DAOs
* inside application scope singletons.
* <p>
* It's still an anti-pattern, but at least this way callers don't use
* Component.getInstance() directly, and ServiceLocator can be subclassed
* to return mock objects for testing.
* @author Sean Flanigan <a href="mailto:sflaniga@redhat.com">sflaniga@redhat.com</a>
*
*/
@AutoCreate
@Name("serviceLocator")
@Scope(ScopeType.STATELESS)
public class ServiceLocator {
public <T> T getInstance(Class<T> clazz) {
return (T) Component.getInstance(clazz);
}
public EntityManager getEntityManager() {
return (EntityManager) Component.getInstance("entityManager");
}
public EntityManagerFactory getEntityManagerFactory() {
return (EntityManagerFactory) Component.getInstance("entityManagerFactory");
}
}