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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.cm;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.logging.Level;
import org.eclipse.osee.framework.access.IAccessProvider;
import org.eclipse.osee.framework.access.internal.AccessControlHelper;
import org.eclipse.osee.framework.access.internal.AccessControlServiceProxy;
import org.eclipse.osee.framework.core.model.IBasicArtifact;
import org.eclipse.osee.framework.core.model.access.AccessData;
import org.eclipse.osee.framework.core.services.CmAccessControl;
import org.eclipse.osee.framework.core.services.CmAccessControlProvider;
import org.eclipse.osee.framework.core.services.IAccessControlService;
import org.eclipse.osee.framework.jdk.core.type.OseeCoreException;
import org.eclipse.osee.framework.jdk.core.util.Conditions;
import org.eclipse.osee.framework.jdk.core.util.Strings;
import org.eclipse.osee.framework.logging.OseeLog;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
/**
* @author Roberto E. Escobar
*/
public final class CmAccessProviderProxy implements IAccessProvider {
private final List<ServiceReference<CmAccessControl>> pending =
new CopyOnWriteArrayList<ServiceReference<CmAccessControl>>();
private final Collection<CmAccessControl> cmServices = new CopyOnWriteArraySet<>();
private IAccessProvider accessProvider;
private CmAccessControlProvider cmProvider;
private BundleContext bundleContext;
private Thread thread;
private volatile boolean requiresReload = true;
public void addCmAccessControl(ServiceReference<CmAccessControl> reference) {
if (isReady()) {
register(bundleContext, reference);
} else {
pending.add(reference);
}
}
public void removeCmAccessControl(ServiceReference<CmAccessControl> reference) {
if (isReady()) {
unregister(bundleContext, reference);
} else {
pending.remove(reference);
}
}
private boolean isReady() {
return bundleContext != null && cmProvider != null;
}
private void register(BundleContext bundleContext, ServiceReference<CmAccessControl> reference) {
CmAccessControl cmAccessControl = bundleContext.getService(reference);
if (isDefault(reference)) {
cmProvider.setDefaultAccessControl(cmAccessControl);
} else {
cmServices.add(cmAccessControl);
}
requiresReload = true;
}
private void unregister(BundleContext bundleContext, ServiceReference<CmAccessControl> reference) {
CmAccessControl cmAccessControl = bundleContext.getService(reference);
if (isDefault(reference)) {
cmProvider.setDefaultAccessControl(null);
} else {
cmServices.remove(cmAccessControl);
}
requiresReload = true;
}
private boolean isDefault(ServiceReference<CmAccessControl> reference) {
boolean toReturn = false;
String value = String.valueOf(reference.getProperty("default"));
if (Strings.isValid(value)) {
toReturn = Boolean.parseBoolean(value);
}
return toReturn;
}
public void start(BundleContext context) {
this.bundleContext = context;
requiresReload = true;
cmProvider = new CmAccessControlProviderImpl(cmServices);
accessProvider = new CmAccessProvider(cmProvider);
for (ServiceReference<CmAccessControl> reference : pending) {
register(bundleContext, reference);
}
pending.clear();
}
public void stop() {
if (thread != null) {
thread.interrupt();
thread = null;
}
accessProvider = null;
cmProvider.setDefaultAccessControl(null);
cmServices.clear();
bundleContext = null;
}
private AccessControlServiceProxy getAccessService() {
AccessControlServiceProxy toReturn = null;
ServiceReference<IAccessControlService> reference =
bundleContext.getServiceReference(IAccessControlService.class);
IAccessControlService service = bundleContext.getService(reference);
if (service instanceof AccessControlServiceProxy) {
toReturn = (AccessControlServiceProxy) service;
} else {
OseeLog.log(AccessControlHelper.class, Level.SEVERE, "Error initializing ObjectAccessProvider");
}
return toReturn;
}
private void reloadCache() {
AccessControlServiceProxy service = getAccessService();
if (service != null) {
service.reloadCache();
}
}
private IAccessProvider getAccessProvider() {
return accessProvider;
}
private void checkInitialized() throws OseeCoreException {
Conditions.checkNotNull(getAccessProvider(), "object access provider",
"Object Access Provider not properly initialized");
if (requiresReload) {
requiresReload = false;
reloadCache();
}
}
@Override
public void computeAccess(IBasicArtifact<?> userArtifact, Collection<?> objToCheck, AccessData accessData) throws OseeCoreException {
checkInitialized();
getAccessProvider().computeAccess(userArtifact, objToCheck, accessData);
}
}
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