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package com.sun.enterprise.glassfish.bootstrap.osgi;

import com.sun.enterprise.glassfish.bootstrap.MainHelper;
import com.sun.enterprise.glassfish.bootstrap.GlassFishImpl;
import com.sun.enterprise.module.ModulesRegistry;
import com.sun.enterprise.module.bootstrap.BootException;
import com.sun.enterprise.module.bootstrap.Main;
import com.sun.enterprise.module.bootstrap.ModuleStartup;
import com.sun.enterprise.module.bootstrap.StartupContext;
import org.glassfish.embeddable.GlassFish;
import org.glassfish.embeddable.GlassFishException;
import org.glassfish.embeddable.GlassFishProperties;
import org.glassfish.embeddable.GlassFishRuntime;
import org.glassfish.hk2.api.ServiceLocator;
import org.osgi.framework.BundleContext;
import org.osgi.util.tracker.ServiceTracker;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

/**
 * Implementation of GlassFishRuntime in an OSGi environment.
 *
 * @author [email protected]
 */
public class EmbeddedOSGiGlassFishRuntime extends GlassFishRuntime {

    // TODO(Sahoo): Merge with StaticGlassFishRuntime and elevate to higher package level.
    // This can be achieved by modelling this as a GlassFishRuntimeDecorator taking StaticGlassFishRuntime
    // as the decorated object.

    List gfs = new ArrayList();

    private final BundleContext context;

    public EmbeddedOSGiGlassFishRuntime(BundleContext context) {
        this.context = context;
    }

    @Override
    public synchronized GlassFish newGlassFish(GlassFishProperties gfProps) throws GlassFishException {
        try {
            // set env props before updating config, because configuration update may actually trigger
            // some code to be executed which may be depending on the environment variable values.
            setEnv(gfProps.getProperties());
            final StartupContext startupContext = new StartupContext(gfProps.getProperties());
            final ServiceTracker hk2Tracker = new ServiceTracker(getBundleContext(), Main.class.getName(), null);
            hk2Tracker.open();
            final Main main = (Main) hk2Tracker.waitForService(0);
            hk2Tracker.close();
            final ModulesRegistry mr = ModulesRegistry.class.cast(getBundleContext().getService(getBundleContext().getServiceReference(ModulesRegistry.class.getName())));
            ServiceLocator serviceLocator = main.createServiceLocator(mr, startupContext, null, null);
            final ModuleStartup gfKernel = main.findStartupService(mr, serviceLocator, null, startupContext);
            GlassFish glassFish = createGlassFish(gfKernel, serviceLocator, gfProps.getProperties());
            gfs.add(glassFish);
            return glassFish;
        } catch (BootException ex) {
            throw new GlassFishException(ex);
        } catch (InterruptedException ex) {
            throw new GlassFishException(ex);
        }
    }

    public synchronized void shutdown() throws GlassFishException {
        // make a copy to avoid ConcurrentModificationException
        for (GlassFish gf : new ArrayList(gfs)) {
            if (gf.getStatus() != GlassFish.Status.DISPOSED) {
                try {
                    gf.dispose();
                } catch (GlassFishException e) {
                    e.printStackTrace();
                }
            }
        }
        gfs.clear();
        shutdownInternal();
        System.out.println("Completed shutdown of GlassFish runtime");
    }

    private void setEnv(Properties properties) {
        final String installRootValue = properties.getProperty(com.sun.enterprise.glassfish.bootstrap.Constants.INSTALL_ROOT_PROP_NAME);
        if (installRootValue != null && !installRootValue.isEmpty()) {
            File installRoot = new File(installRootValue);
            System.setProperty(com.sun.enterprise.glassfish.bootstrap.Constants.INSTALL_ROOT_PROP_NAME, installRoot.getAbsolutePath());
            final Properties asenv = MainHelper.parseAsEnv(installRoot);
            for (String s : asenv.stringPropertyNames()) {
                System.setProperty(s, asenv.getProperty(s));
            }
            System.setProperty(com.sun.enterprise.glassfish.bootstrap.Constants.INSTALL_ROOT_URI_PROP_NAME, installRoot.toURI().toString());
        }
        final String instanceRootValue = properties.getProperty(com.sun.enterprise.glassfish.bootstrap.Constants.INSTANCE_ROOT_PROP_NAME);
        if (instanceRootValue != null && !instanceRootValue.isEmpty()) {
            File instanceRoot = new File(instanceRootValue);
            System.setProperty(com.sun.enterprise.glassfish.bootstrap.Constants.INSTANCE_ROOT_PROP_NAME, instanceRoot.getAbsolutePath());
            System.setProperty(com.sun.enterprise.glassfish.bootstrap.Constants.INSTANCE_ROOT_URI_PROP_NAME, instanceRoot.toURI().toString());
        }
    }

    protected GlassFish createGlassFish(ModuleStartup gfKernel, ServiceLocator habitat, Properties gfProps) throws GlassFishException {
        GlassFish gf = new GlassFishImpl(gfKernel, habitat, gfProps);
        return new EmbeddedOSGiGlassFishImpl(gf, getBundleContext());
    }

    private BundleContext getBundleContext() {
        return context;
    }
}




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