RunLevelBridge.java

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package com.sun.enterprise.v3.server;

import org.glassfish.hk2.api.PostConstruct;
import org.glassfish.hk2.api.PreDestroy;
import org.glassfish.hk2.api.ServiceHandle;
import org.glassfish.hk2.api.ServiceLocator;

import javax.inject.Inject;
import java.util.LinkedList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Abstract base for all run level bridges.
 * 
 * @author Jeff Trent
 * @author Tom Beerbower
 */
@SuppressWarnings("rawtypes")
abstract class RunLevelBridge implements PostConstruct, PreDestroy {

    private final static Logger logger = Logger.getLogger(RunLevelBridge.class.getName());

    private final static Level level = AppServerStartup.level;

    @Inject
    private ServiceLocator locator;

    /**
     * The legacy type we are bridging to.
     */
    private final Class bridgeClass;

    /**
     * The service handles for the services that have been activated.
     */
    private List<ServiceHandle<?>> services = new LinkedList<ServiceHandle<?>>();


    // ----- Constructors ----------------------------------------------------

    RunLevelBridge(Class bridgeClass) {
        this.bridgeClass = bridgeClass;
    }


    // ----- PostConstruct ---------------------------------------------------

    @SuppressWarnings("unchecked")
    @Override
    public void postConstruct() {
        List<ServiceHandle<?>> serviceHandles = locator.getAllServiceHandles(bridgeClass);
        for (ServiceHandle<?> serviceHandle : serviceHandles) {
            long start = System.currentTimeMillis();
            logger.log(level, "starting {0}", serviceHandle);
            try {
                activate(serviceHandle);
            } catch (RuntimeException e) {
                logger.log(Level.SEVERE, "problem starting {0}: {1}", new Object[] {serviceHandle, e.getMessage()});
                logger.log(Level.SEVERE, "nested error", e);
                throw e;
            } catch (Exception e) {
                logger.log(Level.SEVERE, "problem starting {0}: {1}", new Object[] {serviceHandle, e.getMessage()});
                logger.log(Level.SEVERE, "nested error", e);
            }
            if (logger.isLoggable(level)) {
                logger.log(level, "start of " + serviceHandle + " done in "
                    + (System.currentTimeMillis() - start) + " ms");
            }
        }
    }


    // ----- PreDestroy ------------------------------------------------------

    @SuppressWarnings("unchecked")
    @Override
    public void preDestroy() {
        for (ServiceHandle serviceHandle : services) {
            logger.log(level, "releasing {0}", serviceHandle);
            try {
                serviceHandle.getActiveDescriptor().dispose(serviceHandle.getService());
            } catch (Exception e) {
                logger.log(Level.SEVERE, "problem releasing {0}: {1}", new Object[] {serviceHandle, e.getMessage()});
                logger.log(level, "nested error", e);
            }
        }
    }


    // ----- helper methods --------------------------------------------------

    /**
     * Activate a service handle.
     *
     * @param serviceHandle  the service handle
     *
     * @return the service
     */
    protected Object activate(ServiceHandle<?> serviceHandle) {
        Object service = serviceHandle.getService();
        services.add(0, serviceHandle);
        return service;
    }

}