core/org.eclipse.smila.solr/code/src/org/eclipse/smila/solr/Activator.java

/*******************************************************************************
 * Copyright (c) 2010 Empolis GmbH and brox IT Solutions GmbH. All rights reserved. This program and the accompanying
 * materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: Thomas Menzel (brox IT Solution GmbH) initial implementation
 *******************************************************************************/

package org.eclipse.smila.solr;

import org.eclipse.smila.management.ManagementRegistration;
import org.eclipse.smila.search.api.SearchService;
import org.eclipse.smila.solr.admin.SolrAdminAgent;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.util.tracker.ServiceTracker;

/**
 * The solr BundleActivator class.
 */
public class Activator implements BundleActivator {

  /**
   * The bundle name.
   */
  public static final String BUNDLE_ID = "org.eclipse.smila.solr";

  /**
   * this instance is set and unset by the activator, so it might return null depending on the state of the bundle but
   * otherwise this servers as a static handle to get to the important stuff of this bundle.
   */
  private static Activator s_instance;

  /**
   * The SolrManager instance.
   */
  private SolrServerManager _serverManager;

  /**
   * The SearchService service tracker.
   */
  private ServiceTracker _searchServiceTracker;

  /**
   * {@inheritDoc}
   * 
   * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
   */
  @Override
  public void start(BundleContext context) throws Exception {
    s_instance = this;
    _serverManager = new SolrServerManager();
    ManagementRegistration.INSTANCE.registerAgent(new SolrServerManagerAgent(_serverManager));
    ManagementRegistration.INSTANCE.registerAgent(new SolrAdminAgent(_serverManager.getSolrAdmin()));

    _searchServiceTracker = new ServiceTracker(context, SearchService.class.getName(), null);
    _searchServiceTracker.open();
  }

  /**
   * {@inheritDoc}
   * 
   * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
   */
  @Override
  public void stop(BundleContext context) throws Exception {
    s_instance = null;
    _searchServiceTracker.close();
  }

  /**
   * Get activator instance.
   * 
   * @return the activator instance.
   */
  public static Activator getInstance() {
    return s_instance;
  }

  /**
   * Get SolrServerManager.
   * 
   * @return the SolrServerManager.
   */
  public SolrServerManager getSolrManager() {
    return _serverManager;
  }

  /**
   * Get SearchService.
   * 
   * @return the SearchService.
   */
  public SearchService getSearchService() {
    return (SearchService) _searchServiceTracker.getService();
  }

}