diff options
Diffstat (limited to 'java/sca/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/service/discovery/impl/AbstractDiscoveryService.java')
| -rw-r--r-- | java/sca/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/service/discovery/impl/AbstractDiscoveryService.java | 280 |
1 files changed, 0 insertions, 280 deletions
diff --git a/java/sca/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/service/discovery/impl/AbstractDiscoveryService.java b/java/sca/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/service/discovery/impl/AbstractDiscoveryService.java deleted file mode 100644 index 5b0b311d7a..0000000000 --- a/java/sca/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/service/discovery/impl/AbstractDiscoveryService.java +++ /dev/null @@ -1,280 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you under the Apache License, Version 2.0 (the - * "License"); you may not use this file except in compliance - * with the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, - * software distributed under the License is distributed on an - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY - * KIND, either express or implied. See the License for the - * specific language governing permissions and limitations - * under the License. - */ - -package org.apache.tuscany.sca.osgi.service.discovery.impl; - -import static org.apache.tuscany.sca.osgi.remoteserviceadmin.EndpointListener.ENDPOINT_LISTENER_SCOPE; - -import java.util.ArrayList; -import java.util.Collection; -import java.util.Dictionary; -import java.util.HashMap; -import java.util.Hashtable; -import java.util.Iterator; -import java.util.List; -import java.util.Map; -import java.util.concurrent.ConcurrentHashMap; -import java.util.logging.Level; -import java.util.logging.Logger; - -import org.apache.tuscany.sca.core.ExtensionPointRegistry; -import org.apache.tuscany.sca.core.LifeCycleListener; -import org.apache.tuscany.sca.node.NodeFactory; -import org.apache.tuscany.sca.node.impl.NodeFactoryImpl; -import org.apache.tuscany.sca.osgi.remoteserviceadmin.EndpointDescription; -import org.apache.tuscany.sca.osgi.remoteserviceadmin.EndpointListener; -import org.apache.tuscany.sca.osgi.remoteserviceadmin.RemoteConstants; -import org.apache.tuscany.sca.osgi.remoteserviceadmin.impl.OSGiHelper; -import org.osgi.framework.Bundle; -import org.osgi.framework.BundleContext; -import org.osgi.framework.Constants; -import org.osgi.framework.Filter; -import org.osgi.framework.ServiceReference; -import org.osgi.util.tracker.ServiceTracker; - -/** - * - */ -public abstract class AbstractDiscoveryService implements Discovery, LifeCycleListener { - protected final static int ADDED = 0x1; - protected final static int REMOVED = 0x2; - protected final static int MODIFIED = 0x4; - - protected final static Logger logger = Logger.getLogger(AbstractDiscoveryService.class.getName()); - - protected BundleContext context; - protected ExtensionPointRegistry registry; - - private Map<String, List<EndpointListener>> filtersToListeners = new HashMap<String, List<EndpointListener>>(); - // this is effectively a set which allows for multiple service descriptions with the - // same interface name but different properties and takes care of itself with respect to concurrency - protected Map<EndpointDescription, Bundle> servicesInfo = new ConcurrentHashMap<EndpointDescription, Bundle>(); - private Map<EndpointListener, Collection<String>> listenersToFilters = - new HashMap<EndpointListener, Collection<String>>(); - private ServiceTracker trackerTracker; - - public AbstractDiscoveryService(BundleContext context) { - super(); - this.context = context; - } - - public void start() { - // track the registration of EndpointListener - trackerTracker = new ServiceTracker(this.context, EndpointListener.class.getName(), null) { - public Object addingService(ServiceReference reference) { - Object result = super.addingService(reference); - cacheTracker(reference, result); - return result; - } - - public void modifiedService(ServiceReference reference, Object service) { - super.modifiedService(reference, service); - updateTracker(reference, service); - } - - public void removedService(ServiceReference reference, Object service) { - super.removedService(reference, service); - clearTracker(service); - } - }; - - trackerTracker.open(); - } - - public void stop() { - trackerTracker.close(); - } - - protected ExtensionPointRegistry getExtensionPointRegistry() { - NodeFactoryImpl factory = (NodeFactoryImpl)NodeFactory.newInstance(); - factory.init(); - ServiceTracker tracker = new ServiceTracker(context, ExtensionPointRegistry.class.getName(), null); - tracker.open(); - // tracker.waitForService(1000); - registry = (ExtensionPointRegistry)tracker.getService(); - tracker.close(); - return registry; - } - - protected Dictionary<String, Object> getProperties() { - Dictionary headers = context.getBundle().getHeaders(); - Hashtable<String, Object> props = new Hashtable<String, Object>(); - props.put(PRODUCT_NAME, "Apache Tuscany SCA"); - props.put(PRODUCT_VERSION, headers.get(Constants.BUNDLE_VERSION)); - props.put(VENDOR_NAME, headers.get(Constants.BUNDLE_VENDOR)); - // props.put(SUPPORTED_PROTOCOLS, new String[] {"local", "org.osgi.sca"}); - return props; - } - - private synchronized void cacheTracker(ServiceReference reference, Object service) { - if (service instanceof EndpointListener) { - EndpointListener listener = (EndpointListener)service; - Collection<String> filters = - addTracker(reference, listener, ENDPOINT_LISTENER_SCOPE, filtersToListeners, listenersToFilters); - - triggerCallbacks(null, filters, listener, true); - } - } - - private synchronized void clearTracker(Object service) { - if (service instanceof EndpointListener) { - removeTracker((EndpointListener)service, filtersToListeners, listenersToFilters); - } - } - - private synchronized void updateTracker(ServiceReference reference, Object service) { - if (service instanceof EndpointListener) { - EndpointListener listener = (EndpointListener)service; - if (logger.isLoggable(Level.FINE)) { - logger.fine("updating listener: " + listener); - } - Collection<String> oldFilters = removeTracker(listener, filtersToListeners, listenersToFilters); - - Collection<String> newFilters = - addTracker(reference, listener, ENDPOINT_LISTENER_SCOPE, filtersToListeners, listenersToFilters); - - triggerCallbacks(oldFilters, newFilters, listener, true); - } - } - - private void triggerCallbacks(Collection<String> oldInterest, - Collection<String> newInterest, - EndpointListener listener, - boolean isFilter) { - // compute delta between old & new interfaces/filters and - // trigger callbacks for any entries in servicesInfo that - // match any *additional* interface/filters - Collection<String> deltaInterest = new ArrayList<String>(); - if (newInterest != null && !newInterest.isEmpty()) { - if (oldInterest == null || oldInterest.isEmpty()) { - deltaInterest.addAll(newInterest); - } else { - Iterator<String> i = newInterest.iterator(); - while (i.hasNext()) { - String next = (String)i.next(); - if (!oldInterest.contains(next)) { - deltaInterest.add(next); - } - } - } - } - - if (logger.isLoggable(Level.FINE)) { - if (servicesInfo.size() > 0) { - logger.fine("search for matches to trigger callbacks with delta: " + deltaInterest); - } else { - logger.fine("nothing to search for matches to trigger callbacks with delta: " + deltaInterest); - } - } - Iterator<String> i = deltaInterest.iterator(); - while (i.hasNext()) { - String next = i.next(); - for (EndpointDescription sd : servicesInfo.keySet()) { - triggerCallbacks(listener, next, sd, ADDED); - } - } - } - - private void triggerCallbacks(EndpointListener listener, String matchedFilter, EndpointDescription sd, int type) { - switch (type) { - case ADDED: - listener.endpointAdded(sd, matchedFilter); - break; - case REMOVED: - listener.endpointRemoved(sd, matchedFilter); - break; - case MODIFIED: - listener.endpointRemoved(sd, matchedFilter); - listener.endpointAdded(sd, matchedFilter); - break; - } - } - - private boolean filterMatches(String filterValue, EndpointDescription sd) { - Filter filter = OSGiHelper.createFilter(context, filterValue); - Hashtable<String, Object> props = new Hashtable<String, Object>(sd.getProperties()); - // Add two faked properties to make the filter match - props.put(Constants.OBJECTCLASS, sd.getInterfaces()); - props.put(RemoteConstants.SERVICE_IMPORTED, "true"); - return filter != null ? filter.match(props) : false; - } - - static Collection<String> removeTracker(EndpointListener listener, - Map<String, List<EndpointListener>> forwardMap, - Map<EndpointListener, Collection<String>> reverseMap) { - Collection<String> collection = reverseMap.get(listener); - if (collection != null && !collection.isEmpty()) { - reverseMap.remove(listener); - Iterator<String> i = collection.iterator(); - while (i.hasNext()) { - String element = i.next(); - if (forwardMap.containsKey(element)) { - forwardMap.get(element).remove(listener); - } else { - // if the element wasn't on the forwardmap, its a new element and - // shouldn't be returned as part of the collection of old ones - i.remove(); - } - } - } - return collection; - } - - @SuppressWarnings("unchecked") - static Collection<String> addTracker(ServiceReference reference, - EndpointListener listener, - String property, - Map<String, List<EndpointListener>> forwardMap, - Map<EndpointListener, Collection<String>> reverseMap) { - Collection<String> collection = OSGiHelper.getStringCollection(reference, property); - if (logger.isLoggable(Level.FINE)) { - logger.fine("adding listener: " + listener - + " collection: " - + collection - + " registered against prop: " - + property); - } - if (collection != null && !collection.isEmpty()) { - reverseMap.put(listener, new ArrayList<String>(collection)); - Iterator<String> i = collection.iterator(); - while (i.hasNext()) { - String element = i.next(); - if (forwardMap.containsKey(element)) { - forwardMap.get(element).add(listener); - } else { - List<EndpointListener> trackerList = new ArrayList<EndpointListener>(); - trackerList.add(listener); - forwardMap.put(element, trackerList); - } - } - } - return collection; - } - - protected void endpointChanged(EndpointDescription sd, int type) { - for (Map.Entry<EndpointListener, Collection<String>> entry : listenersToFilters.entrySet()) { - for (String filter : entry.getValue()) { - if (filterMatches(filter, sd)) { - triggerCallbacks(entry.getKey(), filter, sd, type); - } - } - } - } - -} |