ConfigConfigBeanListener.java

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package org.glassfish.config.support;

import java.beans.PropertyChangeEvent;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.inject.Inject;
import javax.inject.Named;

import com.sun.enterprise.config.util.ConfigApiLoggerInfo;
import org.glassfish.api.StartupRunLevel;
import org.glassfish.api.admin.ServerEnvironment;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.runlevel.RunLevel;
import org.glassfish.hk2.utilities.BuilderHelper;
import org.glassfish.hk2.utilities.ServiceLocatorUtilities;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.config.ConfigBean;
import org.jvnet.hk2.config.ConfigBeanProxy;
import org.jvnet.hk2.config.ConfigListener;
import org.jvnet.hk2.config.ConfigSupport;
import org.jvnet.hk2.config.UnprocessedChangeEvents;

import com.sun.enterprise.config.serverbeans.Config;
import com.sun.logging.LogDomains;
import static com.sun.enterprise.config.util.ConfigApiLoggerInfo.*;

/**
 * Listens for changes to the Config for the current server and adds an 
 * index for the name ServerEnvironment.DEFAULT_INSTANCE_NAME to any objects
 * that are added.
 */
@Service
@RunLevel(mode=RunLevel.RUNLEVEL_MODE_NON_VALIDATING,value=StartupRunLevel.VAL)
public final class ConfigConfigBeanListener implements ConfigListener {

    @Inject
    private ServiceLocator habitat;
    @Inject @Named(ServerEnvironment.DEFAULT_INSTANCE_NAME)
    Config config;
    static final Logger logger = ConfigApiLoggerInfo.getLogger();


    /* force serial behavior; don't allow more than one thread to make a mess here */
    @Override
    public synchronized UnprocessedChangeEvents changed(PropertyChangeEvent[] events) {
        for (PropertyChangeEvent e : events) {
            // ignore all events for which the source isn't the Config
            if (e.getSource().getClass() != config.getClass()) {
                continue;
            }

            // remove the DEFAULT_INSTANCE_NAME entry for an old value
            Object ov = e.getOldValue();
            if (ov instanceof ConfigBeanProxy) {
                ConfigBeanProxy ovbp = (ConfigBeanProxy) ov;
                logger.log(Level.FINE, removingDefaultInstanceIndexFor,
                        ConfigSupport.getImpl(ovbp).getProxyType().getName());
                ServiceLocatorUtilities.removeFilter(habitat, BuilderHelper.createNameAndContractFilter(
                        ConfigSupport.getImpl(ovbp).getProxyType().getName(),
                        ServerEnvironment.DEFAULT_INSTANCE_NAME));
            }
            
            // add the DEFAULT_INSTANCE_NAME entry for a new value
            Object nv = e.getNewValue();
            if (nv instanceof ConfigBean) {
                ConfigBean nvb = (ConfigBean) nv;
                ConfigBeanProxy nvbp = nvb.getProxy(nvb.getProxyType());
                logger.log(Level.FINE, AddingDefaultInstanceIndexFor,
                        nvb.getProxyType().getName());
                ServiceLocatorUtilities.addOneConstant(habitat, nvbp,
                        ServerEnvironment.DEFAULT_INSTANCE_NAME,
                        nvb.getProxyType());
            }
        }
        return null;
    }
}