Examples of org.osgi.util.tracker.BundleTracker

org.osgi.util.tracker.BundleTracker
The {@code BundleTracker} class simplifies tracking bundles much like the{@code ServiceTracker} simplifies tracking services.
A {@code BundleTracker} is constructed with state criteria and a{@code BundleTrackerCustomizer} object. A {@code BundleTracker} can use the{@code BundleTrackerCustomizer} to select which bundles are tracked and tocreate a customized object to be tracked with the bundle. The {@code BundleTracker} can then be opened to begin tracking all bundles whosestate matches the specified state criteria.
The {@code getBundles} method can be called to get the {@code Bundle} objectsof the bundles being tracked. The {@code getObject} method can be called toget the customized object for a tracked bundle.
The {@code BundleTracker} class is thread-safe. It does not call a{@code BundleTrackerCustomizer} while holding any locks.{@code BundleTrackerCustomizer} implementations must also be thread-safe. @param < T> The type of the tracked object. @ThreadSafe @author $Id: 9a1b57568a8be735292700584f4eb936fc80f2ff $ @since 1.4

  private Map<Long, List<BundleScriptEngineResolver>> resolvers = new ConcurrentHashMap<Long, List<BundleScriptEngineResolver>>();


  public Extender(BundleContext context) {
    Extender.context = context;
    this.engineServiceTracker = new ServiceTracker(context, ProcessEngine.class.getName(), this);
    this.bundleTracker = new BundleTracker(context, Bundle.RESOLVED | Bundle.STARTING | Bundle.ACTIVE, this);
  }

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    @Override
    public synchronized void start(final BundleContext context) throws Exception {
        super.start(context);
        lst = new LogServiceTracker(context, LogService.class.getName(), null);
        lst.open();
      bt = new BundleTracker(context, Bundle.ACTIVE, new CommandMapBundleTrackerCustomizer(this, context.getBundle()));
      bt.open();
  }

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        DiscoveryRegistry registry = new DiscoveryRegistry();
        SystemInstance.get().setComponent(DiscoveryRegistry.class, registry);
        
        started = Boolean.FALSE;
        ServerServiceTracker t = new ServerServiceTracker();
        tracker = new BundleTracker(bundleContext, Bundle.ACTIVE | Bundle.STOPPING, t);
        tracker.open();       
    }

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        new LocatorTrackerCustomizer());
    locatorServiceTracker.open();
    // Create bundle tracker for reading local/xml-file endpoint
    // descriptions
    bundleTrackerCustomizer = new EndpointDescriptionBundleTrackerCustomizer();
    bundleTracker = new BundleTracker(context, Bundle.ACTIVE
        | Bundle.STARTING, bundleTrackerCustomizer);
    // This may trigger local endpoint description discovery
    bundleTracker.open();
  }

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