PersistenceManagerServiceImpl.java

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/*
 * PersistenceManagerServiceImpl.java
 *
 * Created on January 24, 2002
 */

package com.sun.jdo.spi.persistence.support.ejb.ejbc;

import com.sun.jdo.spi.persistence.utility.logging.LogHelper;
import com.sun.jdo.spi.persistence.support.sqlstore.ejb.CMPHelper;
import com.sun.jdo.spi.persistence.support.sqlstore.ejb.SunContainerHelper;
import com.sun.jdo.spi.persistence.support.sqlstore.ejb.LoggerFactoryiAS;

import org.jvnet.hk2.annotations.Service;
import org.glassfish.ejb.spi.CMPService;

/**
 * This class implements CMPService contract and allows to load Sun specific implementation of the
 * ContainerHelper when loaded.
 */
@Service
public class PersistenceManagerServiceImpl implements CMPService {

    // Initialize the appserver loggers.
    static {
        LogHelper.registerLoggerFactory(new LoggerFactoryiAS());
    }

    // Reference and force the initialization of the Sun specific 
    // implementation of the TransactionHelper and the ContainerHelper.
    private static final Class helper = forceInit(SunContainerHelper.class);

    // Reference and force the initialization of the DeploymentEventListener
    // implementation.
/**
    private static final Class listener = 
        forceInit("com.sun.jdo.spi.persistence.support.ejb.ejbc.DeploymentEventListenerImpl");
**/

    public boolean isReady() {
        // Checks that SunContainerHelper regeistered with CMPHelper
        return CMPHelper.isContainerReady();
    }

    /**
     * Forces the initialization of the class pertaining to the specified
     * <tt>Class</tt> object. This method does nothing if the class is already
     * initialized prior to invocation.
     *
     * @param klass the class for which to force initialization
     * @return <tt>klass</tt>
     */
    private static <T> Class<T> forceInit(Class<T> klass) {
        try {
            Class.forName(klass.getName(), true, klass.getClassLoader());
        } catch (ClassNotFoundException e) {
            throw new AssertionError(e);  // Can't happen
        }
        return klass;
    }

}