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/*******************************************************************************
* Copyright (c) 2006, 2021 Cognos Incorporated, IBM Corporation and others
*
* This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0 which
* accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
******************************************************************************/
package org.eclipse.osgi.internal.log;
import java.security.AccessController;
import java.security.Permission;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.eclipse.equinox.log.ExtendedLogService;
import org.eclipse.equinox.log.LogPermission;
import org.eclipse.osgi.framework.util.SecureAction;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleEvent;
import org.osgi.framework.BundleListener;
import org.osgi.framework.ServiceFactory;
import org.osgi.framework.ServiceReference;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.log.LogLevel;
import org.osgi.service.log.Logger;
import org.osgi.service.log.admin.LoggerAdmin;
import org.osgi.service.log.admin.LoggerContext;
public class ExtendedLogServiceFactory implements ServiceFactory, BundleListener {
static final SecureAction secureAction = AccessController.doPrivileged(SecureAction.createSecureAction());
final ReentrantReadWriteLock contextsLock = new ReentrantReadWriteLock();
final LoggerContextTargetMap loggerContextTargetMap = new LoggerContextTargetMap();
private final Permission logPermission = new LogPermission("*", LogPermission.LOG); //$NON-NLS-1$
final ExtendedLogReaderServiceFactory logReaderServiceFactory;
private final LoggerAdmin loggerAdmin = new EquinoxLoggerAdmin();
private final boolean captureLogEntryLocation;
public ExtendedLogServiceFactory(ExtendedLogReaderServiceFactory logReaderServiceFactory, boolean captureLogEntryLocation) {
this.logReaderServiceFactory = logReaderServiceFactory;
this.captureLogEntryLocation = captureLogEntryLocation;
}
boolean captureLogEntryLocation() {
return captureLogEntryLocation;
}
@Override
public ExtendedLogServiceImpl getService(Bundle bundle, ServiceRegistration registration) {
return getLogService(bundle);
}
@Override
public void ungetService(Bundle bundle, ServiceRegistration registration, ExtendedLogService service) {
// do nothing
// Notice that we do not remove the the LogService impl for the bundle because other bundles
// still need to be able to get the cached loggers for a bundle.
}
@Override
public void bundleChanged(BundleEvent event) {
if (event.getType() == BundleEvent.UNINSTALLED)
removeLogService(event.getBundle());
}
ExtendedLogServiceImpl getLogService(Bundle bundle) {
contextsLock.writeLock().lock();
try {
return loggerContextTargetMap.getLogService(bundle, this);
} finally {
contextsLock.writeLock().unlock();
}
}
void shutdown() {
contextsLock.writeLock().lock();
try {
loggerContextTargetMap.clear();
} finally {
contextsLock.writeLock().unlock();
}
}
void removeLogService(Bundle bundle) {
contextsLock.writeLock().lock();
try {
loggerContextTargetMap.remove(bundle);
} finally {
contextsLock.writeLock().unlock();
}
}
boolean isLoggable(Bundle bundle, String name, int level) {
return logReaderServiceFactory.isLoggable(bundle, name, level);
}
void log(Bundle bundle, String name, StackTraceElement stackTraceElement, Object context, LogLevel logLevelEnum, int level, String message, ServiceReference ref, Throwable exception) {
logReaderServiceFactory.log(bundle, name, stackTraceElement, context, logLevelEnum, level, message, ref, exception);
}
void checkLogPermission() throws SecurityException {
SecurityManager sm = System.getSecurityManager();
if (sm != null)
sm.checkPermission(logPermission);
}
EquinoxLoggerContext createEquinoxLoggerContext(String name) {
return new EquinoxLoggerContext(name);
}
LoggerAdmin getLoggerAdmin() {
return loggerAdmin;
}
class EquinoxLoggerAdmin implements LoggerAdmin {
@Override
public LoggerContext getLoggerContext(String name) {
contextsLock.writeLock().lock();
try {
return loggerContextTargetMap.createLoggerContext(name, ExtendedLogServiceFactory.this);
} finally {
contextsLock.writeLock().unlock();
}
}
}
class EquinoxLoggerContext implements LoggerContext {
final String contextName;
final Map contextLogLevels = new HashMap<>();
EquinoxLoggerContext(String name) {
this.contextName = name;
}
@Override
public String getName() {
return contextName;
}
@Override
public LogLevel getEffectiveLogLevel(final String name) {
contextsLock.readLock().lock();
try {
LogLevel level = null;
String lookupName = name;
while ((level = contextLogLevels.get(lookupName)) == null) {
int lastDot = lookupName.lastIndexOf('.');
if (lastDot >= 0) {
lookupName = lookupName.substring(0, lastDot);
} else {
break;
}
}
if (level == null) {
level = contextLogLevels.get(Logger.ROOT_LOGGER_NAME);
}
if (level == null && contextName != null) {
// non-null context name is a non-root context;
// must check the root context for non-root contexts
EquinoxLoggerContext rootContext = loggerContextTargetMap.getRootLoggerContext();
if (rootContext != null) {
level = rootContext.getEffectiveLogLevel(name);
}
}
if (level == null) {
level = logReaderServiceFactory.getDefaultLogLevel();
}
return level;
} finally {
contextsLock.readLock().unlock();
}
}
@Override
public Map getLogLevels() {
contextsLock.readLock().lock();
try {
return new HashMap<>(contextLogLevels);
} finally {
contextsLock.readLock().unlock();
}
}
@Override
public void setLogLevels(Map logLevels) {
boolean readLocked = false;
try {
contextsLock.writeLock().lock();
try {
contextLogLevels.clear();
contextLogLevels.putAll(logLevels);
// downgrade to readlock
contextsLock.readLock().lock();
readLocked = true;
} finally {
contextsLock.writeLock().unlock();
}
loggerContextTargetMap.applyLogLevels(this);
} finally {
if (readLocked) {
contextsLock.readLock().unlock();
}
}
}
@Override
public void clear() {
setLogLevels(Collections.emptyMap());
}
@Override
public boolean isEmpty() {
contextsLock.readLock().lock();
try {
return contextLogLevels.isEmpty();
} finally {
contextsLock.readLock().unlock();
}
}
}
}