Examples with ThreadGate org.apache.felix.framework.util.ThreadGate used on opensource projects

Example 1 with ThreadGate

use of org.apache.felix.framework.util.ThreadGate in project felix by apache.

the class Felix method init.

/**
 * @see org.osgi.framework.launch.Framework#init(org.osgi.framework.FrameworkListener[])
 */
@Override
public void init(final FrameworkListener... listeners) throws BundleException {
    // The system bundle can only be initialized if it currently isn't started.
    acquireBundleLock(this, Bundle.INSTALLED | Bundle.RESOLVED | Bundle.STARTING | Bundle.ACTIVE);
    try {
        if ((getState() == Bundle.INSTALLED) || (getState() == Bundle.RESOLVED)) {
            String security = (String) m_configMap.get(Constants.FRAMEWORK_SECURITY);
            if (security != null) {
                if (System.getSecurityManager() != null) {
                    throw new SecurityException("SecurityManager already installed");
                }
                security = security.trim();
                if (Constants.FRAMEWORK_SECURITY_OSGI.equalsIgnoreCase(security) || (security.length() == 0)) {
                    System.setSecurityManager(m_securityManager = new SecurityManager());
                } else {
                    try {
                        System.setSecurityManager(m_securityManager = (SecurityManager) Class.forName(security).newInstance());
                    } catch (Throwable t) {
                        SecurityException se = new SecurityException("Unable to install custom SecurityManager: " + security);
                        se.initCause(t);
                        throw se;
                    }
                }
            }
            // Generate a framework UUID.
            // Spec says we get a new UUID for each invocation of init().
            m_configMutableMap.put(FelixConstants.FRAMEWORK_UUID, Util.randomUUID());
            // Initialize event dispatcher.
            m_dispatcher.startDispatching();
            // Create the bundle cache, if necessary, so that we can reload any
            // installed bundles.
            m_cache = (BundleCache) m_configMutableMap.get(FelixConstants.FRAMEWORK_BUNDLECACHE_IMPL);
            if (m_cache == null) {
                try {
                    m_cache = new BundleCache(m_logger, m_configMap);
                } catch (Exception ex) {
                    m_logger.log(Logger.LOG_ERROR, "Error creating bundle cache.", ex);
                    throw new BundleException("Error creating bundle cache.", ex);
                }
            }
            // we need to flush the bundle cache.
            if (getState() == Bundle.INSTALLED) {
                String clean = (String) m_configMap.get(Constants.FRAMEWORK_STORAGE_CLEAN);
                if ((clean != null) && clean.equalsIgnoreCase(Constants.FRAMEWORK_STORAGE_CLEAN_ONFIRSTINIT)) {
                    try {
                        m_cache.delete();
                    } catch (Exception ex) {
                        throw new BundleException("Unable to flush bundle cache.", ex);
                    }
                }
            }
            // Initialize installed bundle data structures.
            Map[] maps = new Map[] { new HashMap<String, BundleImpl>(1), new TreeMap<Long, BundleImpl>() };
            m_uninstalledBundles = new ArrayList<BundleImpl>(0);
            // Add the system bundle to the set of installed bundles.
            maps[LOCATION_MAP_IDX].put(_getLocation(), this);
            maps[IDENTIFIER_MAP_IDX].put(new Long(0), this);
            m_installedBundles = maps;
            // state to be set to RESOLVED.
            try {
                m_resolver.resolve(Collections.singleton(adapt(BundleRevision.class)), Collections.EMPTY_SET);
            } catch (ResolutionException ex) {
                // This should never happen.
                throw new BundleException("Unresolved constraint in System Bundle:" + ex.getUnresolvedRequirements());
            }
            // Reload the cached bundles before creating and starting the
            // system bundle, since we want all cached bundles to be reloaded
            // when we activate the system bundle and any subsequent system
            // bundle activators passed into the framework constructor.
            BundleArchive[] archives = null;
            // First get cached bundle identifiers.
            try {
                archives = m_cache.getArchives();
            } catch (Exception ex) {
                m_logger.log(Logger.LOG_ERROR, "Unable to list saved bundles.", ex);
                archives = null;
            }
            // Create system bundle activator and bundle context so we can activate it.
            setActivator(new SystemBundleActivator());
            setBundleContext(new BundleContextImpl(m_logger, this, this));
            boolean javaVersionChanged = handleJavaVersionChange();
            // Now load all cached bundles.
            for (int i = 0; (archives != null) && (i < archives.length); i++) {
                try {
                    // Keep track of the max bundle ID currently in use since we
                    // will need to use this as our next bundle ID value if the
                    // persisted value cannot be read.
                    m_nextId = Math.max(m_nextId, archives[i].getId() + 1);
                    // it now.
                    if (archives[i].getPersistentState() == Bundle.UNINSTALLED) {
                        archives[i].closeAndDelete();
                    } else // Otherwise re-install the cached bundle.
                    {
                        // Install the cached bundle.
                        reloadBundle(archives[i], javaVersionChanged);
                    }
                } catch (Exception ex) {
                    fireFrameworkEvent(FrameworkEvent.ERROR, this, ex);
                    try {
                        m_logger.log(Logger.LOG_ERROR, "Unable to re-install " + archives[i].getLocation(), ex);
                    } catch (Exception ex2) {
                        m_logger.log(Logger.LOG_ERROR, "Unable to re-install cached bundle.", ex);
                    }
                // TODO: FRAMEWORK - Perhaps we should remove the cached bundle?
                }
            }
            for (Bundle extension : m_extensionManager.resolveExtensionBundles(this)) {
                m_extensionManager.startExtensionBundle(this, (BundleImpl) extension);
            }
            // Now that we have loaded all cached bundles and have determined the
            // max bundle ID of cached bundles, we need to try to load the next
            // bundle ID from persistent storage. In case of failure, we should
            // keep the max value.
            m_nextId = Math.max(m_nextId, loadNextId());
            // The framework is now in its startup sequence.
            setBundleStateAndNotify(this, Bundle.STARTING);
            // Now it is possible for threads to wait for the framework to stop,
            // so create a gate for that purpose.
            m_shutdownGate = new ThreadGate();
            // add framework listeners
            if (listeners != null) {
                for (final FrameworkListener fl : listeners) {
                    addFrameworkListener(this, fl);
                }
            }
            // Start services
            m_resolver.start();
            m_fwkWiring.start();
            m_fwkStartLevel.start();
            try {
                Felix.m_secureAction.startActivator(getActivator(), _getBundleContext());
            } catch (Throwable ex) {
                m_dispatcher.stopDispatching();
                m_logger.log(Logger.LOG_ERROR, "Unable to start system bundle.", ex);
                throw new RuntimeException("Unable to start system bundle.");
            }
            // We have to check with the security provider (if there is one).
            // This is to avoid having bundles in the cache that have been tampered with
            SecurityProvider sp = getFramework().getSecurityProvider();
            if ((sp != null) && (System.getSecurityManager() != null)) {
                boolean locked = acquireGlobalLock();
                if (!locked) {
                    throw new BundleException("Unable to acquire the global lock to check the bundle.");
                }
                try {
                    for (Object bundle : m_installedBundles[IDENTIFIER_MAP_IDX].values()) {
                        try {
                            if (bundle != this) {
                                setBundleProtectionDomain(((BundleImpl) bundle).adapt(BundleRevisionImpl.class));
                            }
                        } catch (Exception ex) {
                            ((BundleImpl) bundle).close();
                            maps = new Map[] { new HashMap<String, BundleImpl>(m_installedBundles[LOCATION_MAP_IDX]), new TreeMap<Long, BundleImpl>(m_installedBundles[IDENTIFIER_MAP_IDX]) };
                            maps[LOCATION_MAP_IDX].remove(((BundleImpl) bundle)._getLocation());
                            maps[IDENTIFIER_MAP_IDX].remove(new Long(((BundleImpl) bundle).getBundleId()));
                            m_installedBundles = maps;
                            m_logger.log(Logger.LOG_ERROR, "Bundle in cache doesn't pass security check anymore.", ex);
                        }
                    }
                } finally {
                    // Always release the global lock.
                    releaseGlobalLock();
                }
            }
            m_extensionManager.startPendingExtensionBundles(Felix.this);
            m_fwkWiring.refreshBundles(null);
            // up class lookup for the system bundle.
            synchronized (m_systemBundleClassCache) {
                m_systemBundleClassCache.clear();
            }
        }
    } finally {
        releaseBundleLock(this);
        if (listeners != null) {
            for (final FrameworkListener fl : listeners) {
                removeFrameworkListener(this, fl);
            }
        }
    }
}

Example 2 with ThreadGate

use of org.apache.felix.framework.util.ThreadGate in project felix by apache.

the class Felix method waitForStop.

/**
 * This method will cause the calling thread to block until the framework
 * shuts down.
 * @param timeout A timeout value.
 * @throws java.lang.InterruptedException If the thread was interrupted.
 */
@Override
public FrameworkEvent waitForStop(long timeout) throws InterruptedException {
    // Throw exception if timeout is negative.
    if (timeout < 0) {
        throw new IllegalArgumentException("Timeout cannot be negative.");
    }
    // If there is a gate, wait on it; otherwise, return immediately.
    // Grab a copy of the gate, since it is volatile.
    ThreadGate gate = m_shutdownGate;
    boolean open = false;
    if (gate != null) {
        open = gate.await(timeout);
    }
    FrameworkEvent event;
    if (open && (gate.getMessage() != null)) {
        event = (FrameworkEvent) gate.getMessage();
    } else if (!open && (gate != null)) {
        event = new FrameworkEvent(FrameworkEvent.WAIT_TIMEDOUT, this, null);
    } else {
        event = new FrameworkEvent(FrameworkEvent.STOPPED, this, null);
    }
    return event;
}