Examples with ServiceEvent org.osgi.framework.ServiceEvent used on opensource projects

Example 51 with ServiceEvent

use of org.osgi.framework.ServiceEvent in project fabric8 by jboss-fuse.

the class ZooKeeperClusterBootstrapImpl method cleanInternal.

private BootstrapConfiguration cleanInternal(final BundleContext syscontext, final BootstrapConfiguration bootConfig, RuntimeProperties runtimeProps) throws TimeoutException {
    LOGGER.debug("Begin clean fabric");
    try {
        Configuration zkClientCfg = null;
        Configuration zkServerCfg = null;
        Configuration[] configsSet = configAdmin.get().listConfigurations("(|(service.factoryPid=io.fabric8.zookeeper.server)(service.pid=io.fabric8.zookeeper))");
        if (configsSet != null) {
            for (Configuration cfg : configsSet) {
                // let's explicitly delete client config first
                if ("io.fabric8.zookeeper".equals(cfg.getPid())) {
                    zkClientCfg = cfg;
                }
                if ("io.fabric8.zookeeper.server".equals(cfg.getFactoryPid())) {
                    zkServerCfg = cfg;
                }
            }
        }
        File karafData = new File(data);
        // Setup the listener for unregistration of {@link BootstrapConfiguration}
        final CountDownLatch unregisterLatch = new CountDownLatch(1);
        ServiceListener listener = new ServiceListener() {

            @Override
            public void serviceChanged(ServiceEvent event) {
                if (event.getType() == ServiceEvent.UNREGISTERING) {
                    LOGGER.debug("Unregistering BootstrapConfiguration");
                    bootConfig.getComponentContext().getBundleContext().removeServiceListener(this);
                    unregisterLatch.countDown();
                }
            }
        };
        String filter = "(objectClass=" + BootstrapConfiguration.class.getName() + ")";
        // FABRIC-1052: register listener using the same bundle context that is used for listeners related to SCR
        bootConfig.getComponentContext().getBundleContext().addServiceListener(listener, filter);
        CountDownLatch unregisterLatch2 = null;
        if (syscontext.getServiceReference(CuratorComplete.class) != null) {
            unregisterLatch2 = new CountDownLatch(1);
            final CountDownLatch finalUnregisterLatch = unregisterLatch2;
            listener = new ServiceListener() {

                @Override
                public void serviceChanged(ServiceEvent event) {
                    if (event.getType() == ServiceEvent.UNREGISTERING) {
                        LOGGER.debug("Unregistering CuratorComplete");
                        bootConfig.getComponentContext().getBundleContext().removeServiceListener(this);
                        finalUnregisterLatch.countDown();
                    }
                }
            };
            bootConfig.getComponentContext().getBundleContext().addServiceListener(listener, "(objectClass=" + CuratorComplete.class.getName() + ")");
        }
        // Disable the BootstrapConfiguration component
        // ENTESB-4827: disabling BootstrapConfiguration leads to deactivation of FabricService and ProfileUrlHandler
        // and we have race condition if we're --cleaning after recently created fabric. previous fabric
        // started FabricConfigAdminBridge which scheduled CM updates for tens of PIDs - among others,
        // org.ops4j.pax.web, which leads to an attempt to reconfigure Jetty with "profile:jetty.xml"
        // and if we disable ProfileUrlHandler we may loose Jetty instance
        LOGGER.debug("Disable BootstrapConfiguration");
        ComponentContext componentContext = bootConfig.getComponentContext();
        componentContext.disableComponent(BootstrapConfiguration.COMPONENT_NAME);
        if (!unregisterLatch.await(30, TimeUnit.SECONDS))
            throw new TimeoutException("Timeout for unregistering BootstrapConfiguration service");
        if (unregisterLatch2 != null && !unregisterLatch2.await(30, TimeUnit.SECONDS))
            throw new TimeoutException("Timeout for unregistering CuratorComplete service");
        // Do the cleanup
        runtimeProps.clearRuntimeAttributes();
        cleanConfigurations(syscontext, zkClientCfg, zkServerCfg);
        cleanZookeeperDirectory(karafData);
        cleanGitDirectory(karafData);
        // Setup the registration listener for the new {@link BootstrapConfiguration}
        final CountDownLatch registerLatch = new CountDownLatch(1);
        final AtomicReference<ServiceReference<?>> sref = new AtomicReference<ServiceReference<?>>();
        listener = new ServiceListener() {

            @Override
            public void serviceChanged(ServiceEvent event) {
                if (event.getType() == ServiceEvent.REGISTERED) {
                    LOGGER.debug("Registered BootstrapConfiguration");
                    syscontext.removeServiceListener(this);
                    sref.set(event.getServiceReference());
                    registerLatch.countDown();
                }
            }
        };
        syscontext.addServiceListener(listener, "(objectClass=" + BootstrapConfiguration.class.getName() + ")");
        // Enable the {@link BootstrapConfiguration} component and await the registration of the respective service
        LOGGER.debug("Enable BootstrapConfiguration");
        componentContext.enableComponent(BootstrapConfiguration.COMPONENT_NAME);
        if (!registerLatch.await(30, TimeUnit.SECONDS))
            throw new TimeoutException("Timeout for registering BootstrapConfiguration service");
        return (BootstrapConfiguration) syscontext.getService(sref.get());
    } catch (RuntimeException rte) {
        throw rte;
    } catch (TimeoutException toe) {
        throw toe;
    } catch (Exception ex) {
        throw new FabricException("Unable to delete zookeeper configuration", ex);
    } finally {
        LOGGER.debug("End clean fabric");
    }
}

Example 52 with ServiceEvent

use of org.osgi.framework.ServiceEvent in project spring-roo by spring-projects.

the class Activator method start.

public void start(final BundleContext context) throws Exception {
    startLevelServiceReference = context.getServiceReference(StartLevel.class.getName());
    startLevel = (StartLevel) context.getService(startLevelServiceReference);
    for (final Bundle bundle : context.getBundles()) {
        final String value = bundle.getHeaders().get("Service-Component");
        if (value != null) {
            List<String> componentDescriptions = Arrays.asList(value.split("\\s*,\\s*"));
            for (String desc : componentDescriptions) {
                final URL url = bundle.getResource(desc);
                process(url);
            }
        }
    }
    // Ensure I'm notified of other services changes
    final BundleContext myContext = context;
    context.addServiceListener(new ServiceListener() {

        public void serviceChanged(final ServiceEvent event) {
            final ServiceReference sr = event.getServiceReference();
            final String className = getClassName(sr, myContext);
            if (sr != null) {
                myContext.ungetService(sr);
            }
            if (className == null) {
                // Something went wrong
                return;
            }
            if (event.getType() == ServiceEvent.REGISTERED) {
                if (requiredImplementations.keySet().contains(className)) {
                    runningImplementations.add(className);
                    potentiallyChangeStartLevel();
                }
            } else if (event.getType() == ServiceEvent.UNREGISTERING) {
                if (runningImplementations.contains(className)) {
                    runningImplementations.remove(className);
                    potentiallyChangeStartLevel();
                }
            }
        }
    });
    // Now identify if any services I was interested in are already running
    for (final String requiredService : requiredImplementations.keySet()) {
        final String correspondingInterface = requiredImplementations.get(requiredService);
        final ServiceReference[] srs = context.getServiceReferences(correspondingInterface, null);
        if (srs != null) {
            for (final ServiceReference sr : srs) {
                final String className = getClassName(sr, context);
                if (className == null) {
                    // Something went wrong
                    continue;
                }
                if (requiredImplementations.keySet().contains(className)) {
                    runningImplementations.add(className);
                }
            }
        }
    }
    // Potentially change the start level, now that we've added all the
    // known started services
    potentiallyChangeStartLevel();
}

Example 53 with ServiceEvent

use of org.osgi.framework.ServiceEvent in project ecf by eclipse.

the class Activator method start.

/* (non-Javadoc)
	 * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
	 */
public void start(final BundleContext context) throws Exception {
    final ServiceReference configAdminServiceRef = context.getServiceReference(ConfigurationAdmin.class.getName());
    if (configAdminServiceRef == null) {
        System.err.println("You don't have config admin deployed. Some tests will fail that require configuration!");
        return;
    }
    final ConfigurationAdmin configAdmin = (ConfigurationAdmin) context.getService(configAdminServiceRef);
    Configuration config = configAdmin.createFactoryConfiguration(DnsSdTestHelper.ECF_DISCOVERY_DNSSD + ".locator", null);
    Dictionary properties = new Hashtable();
    properties.put(IDnsSdDiscoveryConstants.CA_SEARCH_PATH, new String[] { DnsSdTestHelper.DOMAIN });
    properties.put(IDnsSdDiscoveryConstants.CA_RESOLVER, DnsSdTestHelper.DNS_RESOLVER);
    properties.put(IDnsSdDiscoveryConstants.CA_TSIG_KEY, DnsSdTestHelper.TSIG_KEY);
    properties.put(IDnsSdDiscoveryConstants.CA_TSIG_KEY_NAME, DnsSdTestHelper.TSIG_KEY_NAME);
    config.update(properties);
    String filter = "(" + Constants.SERVICE_PID + "=" + config.getPid() + ")";
    // add the service listener
    locListener = new ServiceListener() {

        public void serviceChanged(ServiceEvent event) {
            switch(event.getType()) {
                case ServiceEvent.REGISTERED:
                    ServiceReference serviceReference = event.getServiceReference();
                    discoveryLocator = (IDiscoveryLocator) context.getService(serviceReference);
                    synchronized (locLock) {
                        locLock.notifyAll();
                    }
            }
        }
    };
    context.addServiceListener(locListener, filter);
    // try to get the service initially
    ServiceReference[] references = context.getServiceReferences(IDiscoveryLocator.class.getName(), filter);
    if (references != null) {
        for (int i = 0; i < references.length; ) {
            ServiceReference serviceReference = references[i];
            discoveryLocator = (IDiscoveryLocator) context.getService(serviceReference);
            synchronized (locLock) {
                locLock.notifyAll();
            }
        }
    }
    // advertiser
    config = configAdmin.createFactoryConfiguration(DnsSdTestHelper.ECF_DISCOVERY_DNSSD + ".advertiser", null);
    properties = new Hashtable();
    properties.put(IDnsSdDiscoveryConstants.CA_SEARCH_PATH, new String[] { DnsSdTestHelper.DOMAIN });
    properties.put(IDnsSdDiscoveryConstants.CA_RESOLVER, DnsSdTestHelper.DNS_RESOLVER);
    properties.put(IDnsSdDiscoveryConstants.CA_TSIG_KEY, DnsSdTestHelper.TSIG_KEY);
    properties.put(IDnsSdDiscoveryConstants.CA_TSIG_KEY_NAME, DnsSdTestHelper.TSIG_KEY_NAME);
    config.update(properties);
    filter = "(" + Constants.SERVICE_PID + "=" + config.getPid() + ")";
    // add the service listener
    advListener = new ServiceListener() {

        public void serviceChanged(ServiceEvent event) {
            switch(event.getType()) {
                case ServiceEvent.REGISTERED:
                    ServiceReference serviceReference = event.getServiceReference();
                    discoveryAdvertiser = (IDiscoveryAdvertiser) context.getService(serviceReference);
                    synchronized (advLock) {
                        advLock.notifyAll();
                    }
            }
        }
    };
    context.addServiceListener(advListener, filter);
    // try to get the service initially
    references = context.getServiceReferences(IDiscoveryAdvertiser.class.getName(), filter);
    if (references != null) {
        for (int i = 0; i < references.length; ) {
            ServiceReference serviceReference = references[i];
            discoveryAdvertiser = (IDiscoveryAdvertiser) context.getService(serviceReference);
            synchronized (advLock) {
                advLock.notifyAll();
            }
        }
    }
}

Example 54 with ServiceEvent

use of org.osgi.framework.ServiceEvent in project aries by apache.

the class BundleEventHookTest method testIgnoreUninstalledOriginBundleInAsyncInstalledEvent.

/*
     * Because bundle events are queued for later asynchronous processing while
     * the root subsystem is initializing, it is possible to see an installed
     * event whose origin bundle has been uninstalled (i.e. the origin bundle's
     * revision will be null). These events should result in the installed
     * bundle being associated with the root subsystem.
     */
@Test
public void testIgnoreUninstalledOriginBundleInAsyncInstalledEvent() throws Exception {
    final Bundle core = getSubsystemCoreBundle();
    core.stop();
    final Bundle b = bundleContext.installBundle(BUNDLE_B, new FileInputStream(BUNDLE_B));
    // Ensure bundle B has a context.
    b.start();
    final AtomicReference<Bundle> a = new AtomicReference<Bundle>();
    bundleContext.addServiceListener(new ServiceListener() {

        @SuppressWarnings("unchecked")
        @Override
        public void serviceChanged(ServiceEvent event) {
            if ((event.getType() & (ServiceEvent.REGISTERED | ServiceEvent.MODIFIED)) == 0)
                return;
            if (a.get() != null)
                // We've been here before and already done what needs doing.
                return;
            ServiceReference sr = (ServiceReference) event.getServiceReference();
            bundleContext.getService(sr);
            try {
                // Queue up the installed event for bundle A using B's context.
                a.set(b.getBundleContext().installBundle(BUNDLE_A, new FileInputStream(BUNDLE_A)));
                // Ensure the origin bundle will be uninstalled before the event is processed.
                b.uninstall();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }, "(&(objectClass=org.osgi.service.subsystem.Subsystem)(subsystem.id=0)(subsystem.state=RESOLVED))");
    try {
        // Before the fix, this would fail due to an NPE resulting from a
        // null bundle revision.
        core.start();
    } catch (BundleException e) {
        e.printStackTrace();
        fail("Subsystems failed to handle an asynchronous bundle installed event after the origin bundle was uninstalled");
    }
    assertBundleState(a.get(), Bundle.INSTALLED);
    assertBundleState(b, Bundle.UNINSTALLED);
    Subsystem root = getRootSubsystem();
    assertState(Subsystem.State.ACTIVE, root);
    assertConstituent(root, a.get().getSymbolicName());
}

Example 55 with ServiceEvent

use of org.osgi.framework.ServiceEvent in project aries by apache.

the class BundleEventHookTest method testNoDeadlockWhenSubsystemsInitializing.

/*
     * See https://issues.apache.org/jira/browse/ARIES-982.
     * 
     * When activating, the subsystems bundle must initialize the root subsystem
     * along with any persisted subsystems. Part of the root subsystem 
     * initialization consists of adding all pre-existing bundles as 
     * constituents. In order to ensure that no bundles are missed, a bundle
     * event hook is registered first. The bundle event hook cannot process
     * events until the initialization is complete. Another part of 
     * initialization consists of registering the root subsystem service.
     * Therefore, a potential deadlock exists if something reacts to the
     * service registration by installing an unmanaged bundle.
     */
@Test
public void testNoDeadlockWhenSubsystemsInitializing() throws Exception {
    final Bundle bundle = getSubsystemCoreBundle();
    bundle.stop();
    final AtomicBoolean completed = new AtomicBoolean(false);
    final ExecutorService executor = Executors.newFixedThreadPool(2);
    try {
        bundleContext.addServiceListener(new ServiceListener() {

            @Override
            public void serviceChanged(ServiceEvent event) {
                Future<?> future = executor.submit(new Runnable() {

                    public void run() {
                        try {
                            Bundle a = bundle.getBundleContext().installBundle(BUNDLE_A, new FileInputStream(BUNDLE_A));
                            completed.set(true);
                            a.uninstall();
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                });
                try {
                    future.get();
                    completed.set(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }, "(&(objectClass=org.osgi.service.subsystem.Subsystem)(subsystem.id=0))");
        Future<?> future = executor.submit(new Runnable() {

            public void run() {
                try {
                    bundle.start();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
        try {
            future.get(3, TimeUnit.SECONDS);
            assertTrue("Deadlock detected", completed.get());
        } catch (TimeoutException e) {
            fail("Deadlock detected");
        }
    } finally {
        executor.shutdownNow();
    }
}