Examples with ServiceTracker org.osgi.util.tracker.ServiceTracker used on opensource projects

Example 6 with ServiceTracker

use of org.osgi.util.tracker.ServiceTracker in project aries by apache.

the class AbstractJPATransactionTest method getService.

protected <T> T getService(Class<T> clazz, String filter, long timeout) throws InvalidSyntaxException {
    Filter f = FrameworkUtil.createFilter(filter == null ? "(|(foo=bar)(!(foo=bar)))" : filter);
    ServiceTracker<T, T> tracker = new ServiceTracker<T, T>(context, clazz, null) {

        @Override
        public T addingService(ServiceReference<T> reference) {
            return f.match(reference) ? super.addingService(reference) : null;
        }
    };
    tracker.open();
    try {
        T t = tracker.waitForService(timeout);
        if (t == null) {
            throw new NoSuchElementException(clazz.getName());
        }
        return t;
    } catch (InterruptedException e) {
        throw new RuntimeException("Error waiting for service " + clazz.getName(), e);
    } finally {
        trackers.add(tracker);
    }
}

Example 7 with ServiceTracker

use of org.osgi.util.tracker.ServiceTracker in project jackrabbit-oak by apache.

the class OsgiWhiteboard method track.

/**
     * Returns a tracker for services of the given type. The returned tracker
     * is optimized for frequent {@link Tracker#getServices()} calls through
     * the use of a pre-compiled list of services that's atomically updated
     * whenever services are added, modified or removed.
     */
@Override
public <T> Tracker<T> track(final Class<T> type) {
    checkNotNull(type);
    final AtomicReference<List<T>> list = new AtomicReference<List<T>>(Collections.<T>emptyList());
    final ServiceTrackerCustomizer customizer = new ServiceTrackerCustomizer() {

        private final Map<ServiceReference, T> services = newHashMap();

        @Override
        @SuppressWarnings("unchecked")
        public synchronized Object addingService(ServiceReference reference) {
            Object service = context.getService(reference);
            if (type.isInstance(service)) {
                services.put(reference, (T) service);
                list.set(getServiceList(services));
                return service;
            } else {
                context.ungetService(reference);
                return null;
            }
        }

        @Override
        @SuppressWarnings("unchecked")
        public synchronized void modifiedService(ServiceReference reference, Object service) {
            // TODO: Figure out if the old reference instance
            // would automatically reflect the updated properties.
            // For now we play it safe by replacing the old key
            // with the new reference instance passed as argument.
            services.remove(reference);
            services.put(reference, (T) service);
            list.set(getServiceList(services));
        }

        @Override
        public synchronized void removedService(ServiceReference reference, Object service) {
            services.remove(reference);
            list.set(getServiceList(services));
            // TODO: Note that the service might still be in use
            // by some client that called getServices() before
            // this method was invoked.
            context.ungetService(reference);
        }
    };
    final ServiceTracker tracker = new ServiceTracker(context, type.getName(), customizer);
    tracker.open();
    return new Tracker<T>() {

        @Override
        public List<T> getServices() {
            return list.get();
        }

        @Override
        public void stop() {
            tracker.close();
        }
    };
}

Example 8 with ServiceTracker

use of org.osgi.util.tracker.ServiceTracker in project karaf by apache.

the class EncryptableConfigAdminPropertyPlaceholderTest method getOsgiService.

protected <T> T getOsgiService(Class<T> type, String filter, long timeout) {
    ServiceTracker tracker = null;
    try {
        String flt;
        if (filter != null) {
            if (filter.startsWith("(")) {
                flt = "(&(" + Constants.OBJECTCLASS + "=" + type.getName() + ")" + filter + ")";
            } else {
                flt = "(&(" + Constants.OBJECTCLASS + "=" + type.getName() + ")(" + filter + "))";
            }
        } else {
            flt = "(" + Constants.OBJECTCLASS + "=" + type.getName() + ")";
        }
        Filter osgiFilter = FrameworkUtil.createFilter(flt);
        tracker = new ServiceTracker(bundleContext, osgiFilter, null);
        tracker.open(true);
        // Note that the tracker is not closed to keep the reference
        // This is buggy, as the service reference may change i think
        Object svc = type.cast(tracker.waitForService(timeout));
        if (svc == null) {
            Dictionary dic = bundleContext.getBundle().getHeaders();
            System.err.println("Test bundle headers: " + explode(dic));
            for (ServiceReference ref : asCollection(bundleContext.getAllServiceReferences(null, null))) {
                System.err.println("ServiceReference: " + ref);
            }
            for (ServiceReference ref : asCollection(bundleContext.getAllServiceReferences(null, flt))) {
                System.err.println("Filtered ServiceReference: " + ref);
            }
            throw new RuntimeException("Gave up waiting for service " + flt);
        }
        return type.cast(svc);
    } catch (InvalidSyntaxException e) {
        throw new IllegalArgumentException("Invalid filter", e);
    } catch (InterruptedException e) {
        throw new RuntimeException(e);
    }
}

Example 9 with ServiceTracker

use of org.osgi.util.tracker.ServiceTracker in project karaf by apache.

the class EncryptablePropertyPlaceholderTest method getOsgiService.

protected <T> T getOsgiService(Class<T> type, String filter, long timeout) {
    ServiceTracker tracker = null;
    try {
        String flt;
        if (filter != null) {
            if (filter.startsWith("(")) {
                flt = "(&(" + Constants.OBJECTCLASS + "=" + type.getName() + ")" + filter + ")";
            } else {
                flt = "(&(" + Constants.OBJECTCLASS + "=" + type.getName() + ")(" + filter + "))";
            }
        } else {
            flt = "(" + Constants.OBJECTCLASS + "=" + type.getName() + ")";
        }
        Filter osgiFilter = FrameworkUtil.createFilter(flt);
        tracker = new ServiceTracker(bundleContext, osgiFilter, null);
        tracker.open(true);
        // Note that the tracker is not closed to keep the reference
        // This is buggy, as the service reference may change i think
        Object svc = type.cast(tracker.waitForService(timeout));
        if (svc == null) {
            Dictionary dic = bundleContext.getBundle().getHeaders();
            System.err.println("Test bundle headers: " + explode(dic));
            for (ServiceReference ref : asCollection(bundleContext.getAllServiceReferences(null, null))) {
                System.err.println("ServiceReference: " + ref);
            }
            for (ServiceReference ref : asCollection(bundleContext.getAllServiceReferences(null, flt))) {
                System.err.println("Filtered ServiceReference: " + ref);
            }
            throw new RuntimeException("Gave up waiting for service " + flt);
        }
        return type.cast(svc);
    } catch (InvalidSyntaxException e) {
        throw new IllegalArgumentException("Invalid filter", e);
    } catch (InterruptedException e) {
        throw new RuntimeException(e);
    }
}

Example 10 with ServiceTracker

use of org.osgi.util.tracker.ServiceTracker in project sling by apache.

the class BindingsValuesProvidersByContextImpl method activate.

@Activate
public void activate(ComponentContext ctx) {
    bundleContext = ctx.getBundleContext();
    synchronized (pendingRefs) {
        for (ServiceReference ref : pendingRefs) {
            addingService(ref);
        }
        pendingRefs.clear();
    }
    bvpTracker = new ServiceTracker(bundleContext, BindingsValuesProvider.class.getName(), this);
    bvpTracker.open();
    // Map services can also be registered to provide bindings
    mapsTracker = new ServiceTracker(bundleContext, Map.class.getName(), this);
    mapsTracker.open();
}