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/*******************************************************************************
* Copyright (c) 2010 Boeing.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.access.internal;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.logging.Level;
import org.eclipse.osee.framework.access.IAccessProvider;
import org.eclipse.osee.framework.core.data.IOseeBranch;
import org.eclipse.osee.framework.core.enums.PermissionEnum;
import org.eclipse.osee.framework.core.model.IBasicArtifact;
import org.eclipse.osee.framework.core.model.access.AccessDataQuery;
import org.eclipse.osee.framework.core.services.IAccessControlService;
import org.eclipse.osee.framework.core.services.IOseeCachingService;
import org.eclipse.osee.framework.core.services.IdentityService;
import org.eclipse.osee.framework.core.util.Conditions;
import org.eclipse.osee.framework.database.IOseeDatabaseService;
import org.eclipse.osee.framework.jdk.core.type.OseeCoreException;
import org.eclipse.osee.framework.lifecycle.ILifecycleService;
import org.eclipse.osee.framework.logging.OseeLog;
import org.eclipse.osee.framework.skynet.core.event.OseeEventService;
import org.eclipse.osee.framework.skynet.core.event.listener.EventQosType;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
public final class AccessControlServiceProxy implements IAccessControlService {
private final List<ServiceReference<IAccessProvider>> registered =
new CopyOnWriteArrayList<ServiceReference<IAccessProvider>>();
private final List<ServiceReference<IAccessProvider>> pendingProviders =
new CopyOnWriteArrayList<ServiceReference<IAccessProvider>>();
private IOseeDatabaseService dbService;
private IOseeCachingService cachingService;
private IdentityService identityService;
private OseeEventService eventService;
private ILifecycleService lifecycleService;
private AccessControlService accessService;
private AccessEventListener accessEventListener;
private Thread thread;
public void setDbService(IOseeDatabaseService dbService) {
this.dbService = dbService;
}
public void setCachingService(IOseeCachingService cachingService) {
this.cachingService = cachingService;
}
public void setIdentityService(IdentityService identityService) {
this.identityService = identityService;
}
public void setEventService(OseeEventService eventService) {
this.eventService = eventService;
}
public void setLifecycleService(ILifecycleService service) {
this.lifecycleService = service;
}
public void addAccessProvider(ServiceReference<IAccessProvider> reference) {
if (isReady()) {
register(reference);
registered.add(reference);
} else {
pendingProviders.add(reference);
}
}
public void removeAccessProvider(ServiceReference<IAccessProvider> reference) {
if (isReady()) {
deregister(reference);
registered.remove(reference);
} else {
pendingProviders.remove(reference);
}
}
private IAccessProvider getService(ServiceReference<IAccessProvider> reference) {
Bundle bundle = reference.getBundle();
BundleContext bundleContext = bundle.getBundleContext();
return bundleContext.getService(reference);
}
private void register(ServiceReference<IAccessProvider> reference) {
try {
IAccessProvider accessProvider = getService(reference);
lifecycleService.addHandler(AccessProviderVisitor.TYPE, accessProvider);
} catch (OseeCoreException ex) {
OseeLog.log(AccessControlHelper.class, Level.SEVERE, ex);
}
}
private void deregister(ServiceReference<IAccessProvider> reference) {
try {
IAccessProvider accessProvider = getService(reference);
lifecycleService.removeHandler(AccessProviderVisitor.TYPE, accessProvider);
} catch (OseeCoreException ex) {
OseeLog.log(AccessControlHelper.class, Level.SEVERE, ex);
}
}
private synchronized void ensureInitialized() {
if (accessService != null && !pendingProviders.isEmpty()) {
for (ServiceReference<IAccessProvider> reference : pendingProviders) {
register(reference);
}
pendingProviders.clear();
}
}
public AccessControlService getProxiedObject() {
ensureInitialized();
return accessService;
}
public void reloadCache() {
try {
getProxiedObject().reloadCache();
} catch (OseeCoreException ex) {
OseeLog.log(AccessControlServiceProxy.class, Level.WARNING, ex);
}
}
private boolean isReady() {
return accessService != null && lifecycleService != null;
}
public void start() {
accessService = new AccessControlService(dbService, cachingService, identityService, eventService);
accessEventListener = new AccessEventListener(accessService, new AccessControlCacheHandler());
eventService.addListener(EventQosType.PRIORITY, accessEventListener);
accessService.start();
}
public void stop() {
if (thread != null) {
thread.interrupt();
thread = null;
}
for (ServiceReference<IAccessProvider> provider : registered) {
deregister(provider);
}
registered.clear();
if (accessEventListener != null) {
eventService.removeListener(EventQosType.PRIORITY, accessEventListener);
accessEventListener = null;
}
if (accessService != null) {
accessService.stop();
accessService = null;
}
}
private void checkInitialized() throws OseeCoreException {
Conditions.checkNotNull(getProxiedObject(), "accessService", "Access Service not properly initialized");
}
@Override
public boolean hasPermission(Object object, PermissionEnum permission) throws OseeCoreException {
checkInitialized();
return getProxiedObject().hasPermission(object, permission);
}
@Override
public void removePermissions(IOseeBranch branch) throws OseeCoreException {
checkInitialized();
getProxiedObject().removePermissions(branch);
}
@Override
public AccessDataQuery getAccessData(IBasicArtifact<?> userArtifact, Collection<?> itemsToCheck) throws OseeCoreException {
checkInitialized();
return getProxiedObject().getAccessData(userArtifact, itemsToCheck);
}
}
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