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*
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* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at legal-notices/CDDLv1_0.txt.
* If applicable, add the following below this CDDL HEADER, with the
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*
* Copyright 2006-2008 Sun Microsystems, Inc.
* Portions Copyright 2011-2015 ForgeRock AS.
*/
package org.opends.server.loggers;
import static org.opends.messages.ConfigMessages.*;
import static org.opends.server.util.StaticUtils.*;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import org.forgerock.i18n.LocalizableMessage;
import org.forgerock.i18n.LocalizableMessageDescriptor.Arg3;
import org.forgerock.i18n.slf4j.LocalizedLogger;
import org.forgerock.opendj.config.server.ConfigChangeResult;
import org.forgerock.opendj.config.server.ConfigException;
import org.forgerock.opendj.ldap.ResultCode;
import org.opends.server.admin.ClassPropertyDefinition;
import org.opends.server.admin.server.ConfigurationAddListener;
import org.opends.server.admin.server.ConfigurationChangeListener;
import org.opends.server.admin.server.ConfigurationDeleteListener;
import org.opends.server.admin.std.server.LogPublisherCfg;
import org.opends.server.core.DirectoryServer;
import org.opends.server.core.ServerContext;
import org.opends.server.types.DN;
import org.opends.server.types.InitializationException;
import org.opends.server.util.StaticUtils;
/**
* This class defines the wrapper that will invoke all registered loggers for
* each type of request received or response sent. If no log publishers are
* registered, messages will be directed to standard out.
*
* @param <P>
* The type of the LogPublisher corresponding to this logger
* @param <C>
* The type of the LogPublisherCfg corresponding to this logger
*/
public abstract class AbstractLogger
<P extends LogPublisher<C>, C extends LogPublisherCfg>
implements ConfigurationAddListener<C>, ConfigurationDeleteListener<C>,
ConfigurationChangeListener<C>
{
/**
* The storage designed to store log publishers. It is helpful in abstracting
* away the methods used to manage the collection.
*
* @param <P>
* The concrete {@link LogPublisher} type
* @param <C>
* The concrete {@link LogPublisherCfg} type
*/
protected static class LoggerStorage<P extends LogPublisher<C>,
C extends LogPublisherCfg>
{
/** Defined as public to allow subclasses of {@link AbstractLogger} to instantiate it. */
public LoggerStorage()
{
super();
}
/** The set of loggers that have been registered with the server. It will initially be empty. */
private Collection<P> logPublishers = new CopyOnWriteArrayList<>();
/**
* Add a log publisher to the logger.
*
* @param publisher
* The log publisher to add.
*/
public synchronized void addLogPublisher(P publisher)
{
logPublishers.add(publisher);
}
/**
* Remove a log publisher from the logger.
*
* @param publisher
* The log publisher to remove.
* @return True if the log publisher is removed or false otherwise.
*/
public synchronized boolean removeLogPublisher(P publisher)
{
boolean removed = logPublishers.remove(publisher);
if (removed)
{
publisher.close();
}
return removed;
}
/** Removes all existing log publishers from the logger. */
public synchronized void removeAllLogPublishers()
{
StaticUtils.close(logPublishers);
logPublishers.clear();
}
/**
* Returns the logPublishers.
*
* @return the collection of {@link LogPublisher}s
*/
public Collection<P> getLogPublishers()
{
return logPublishers;
}
}
/**
* Returns the log publishers.
*
* @return the collection of {@link LogPublisher}s
*/
protected abstract Collection<P> getLogPublishers();
/**
* Add a log publisher to the logger.
*
* @param publisher
* The log publisher to add.
*/
public abstract void addLogPublisher(P publisher);
/**
* Remove a log publisher from the logger.
*
* @param publisher
* The log publisher to remove.
* @return True if the log publisher is removed or false otherwise.
*/
public abstract boolean removeLogPublisher(P publisher);
/** Removes all existing log publishers from the logger. */
public abstract void removeAllLogPublishers();
/**
* Returns the java {@link ClassPropertyDefinition} for the current logger.
*
* @return the java {@link ClassPropertyDefinition} for the current logger.
*/
protected abstract ClassPropertyDefinition getJavaClassPropertyDefinition();
private final Class<P> logPublisherClass;
private final Arg3<Object, Object, Object> invalidLoggerClassErrorMessage;
private ServerContext serverContext;
/**
* The constructor for this class.
*
* @param logPublisherClass
* the log publisher class
* @param invalidLoggerClassErrorMessage
* the error message to use if the logger class in invalid
*/
AbstractLogger(
final Class<P> logPublisherClass,
final Arg3<Object, Object, Object>
invalidLoggerClassErrorMessage)
{
this.logPublisherClass = logPublisherClass;
this.invalidLoggerClassErrorMessage = invalidLoggerClassErrorMessage;
}
/**
* Initializes all the log publishers.
*
* @param configs The log publisher configurations.
* @param serverContext
* The server context.
* @throws ConfigException
* If an unrecoverable problem arises in the process of
* performing the initialization as a result of the server
* configuration.
* @throws InitializationException
* If a problem occurs during initialization that is not
* related to the server configuration.
*/
public void initializeLogger(List<C> configs, ServerContext serverContext)
throws ConfigException, InitializationException
{
this.serverContext = serverContext;
for (C config : configs)
{
config.addChangeListener((ConfigurationChangeListener) this);
if (config.isEnabled())
{
final P logPublisher = serverContext.getCommonAudit().isCommonAuditConfig(config) ?
getLogPublisherForCommonAudit(config) : getLogPublisher(config);
addLogPublisher(logPublisher);
}
}
}
ServerContext getServerContext()
{
return serverContext;
}
@Override
public boolean isConfigurationAddAcceptable(C config, List<LocalizableMessage> unacceptableReasons)
{
return !config.isEnabled() || isJavaClassAcceptable(config, unacceptableReasons);
}
@Override
public boolean isConfigurationChangeAcceptable(C config, List<LocalizableMessage> unacceptableReasons)
{
return !config.isEnabled() || isJavaClassAcceptable(config, unacceptableReasons);
}
@Override
public ConfigChangeResult applyConfigurationAdd(C config)
{
final ConfigChangeResult ccr = applyConfigurationAdd0(config);
if (ccr.getResultCode() == ResultCode.SUCCESS)
{
config.addChangeListener((ConfigurationChangeListener) this);
}
return ccr;
}
private ConfigChangeResult applyConfigurationAdd0(C config)
{
final ConfigChangeResult ccr = new ConfigChangeResult();
if (config.isEnabled())
{
try
{
final P logPublisher = serverContext.getCommonAudit().isCommonAuditConfig(config) ?
getLogPublisherForCommonAudit(config) : getLogPublisher(config);
addLogPublisher(logPublisher);
}
catch(ConfigException e)
{
LocalizedLogger.getLoggerForThisClass().traceException(e);
ccr.addMessage(e.getMessageObject());
ccr.setResultCode(DirectoryServer.getServerErrorResultCode());
}
catch (Exception e)
{
LocalizedLogger.getLoggerForThisClass().traceException(e);
ccr.addMessage(ERR_CONFIG_LOGGER_CANNOT_CREATE_LOGGER.get(config.dn(), stackTraceToSingleLineString(e)));
ccr.setResultCode(DirectoryServer.getServerErrorResultCode());
}
}
return ccr;
}
private P findLogPublisher(DN dn)
{
for (P publisher : getLogPublishers())
{
if (publisher.getDN().equals(dn))
{
return publisher;
}
}
return null;
}
@Override
public ConfigChangeResult applyConfigurationChange(C config)
{
final ConfigChangeResult ccr = new ConfigChangeResult();
P logPublisher = findLogPublisher(config.dn());
if (logPublisher == null)
{
if (config.isEnabled())
{
// Needs to be added and enabled
return applyConfigurationAdd0(config);
}
}
else
{
if (config.isEnabled())
{
// Changes to the class name cannot be
// applied dynamically, so if the class name did change then
// indicate that administrative action is required for that
// change to take effect.
String className = config.getJavaClass();
if (!className.equals(logPublisher.getClass().getName()))
{
ccr.setAdminActionRequired(true);
}
try
{
CommonAudit commonAudit = serverContext.getCommonAudit();
if (commonAudit.isCommonAuditConfig(config))
{
commonAudit.addOrUpdatePublisher(config);
} // else the publisher is currently active, so we don't need to do anything.
}
catch (Exception e)
{
LocalizedLogger.getLoggerForThisClass().traceException(e);
ccr.addMessage(ERR_CONFIG_LOGGER_CANNOT_UPDATE_LOGGER.get(config.dn(), stackTraceToSingleLineString(e)));
ccr.setResultCode(DirectoryServer.getServerErrorResultCode());
}
}
else
{
// The publisher is being disabled so shut down and remove.
return applyConfigurationDelete(config);
}
}
return ccr;
}
@Override
public boolean isConfigurationDeleteAcceptable(C config, List<LocalizableMessage> unacceptableReasons)
{
return findLogPublisher(config.dn()) != null;
}
@Override
public ConfigChangeResult applyConfigurationDelete(C config)
{
final ConfigChangeResult ccr = new ConfigChangeResult();
P logPublisher = findLogPublisher(config.dn());
if(logPublisher != null)
{
removeLogPublisher(logPublisher);
try
{
CommonAudit commonAudit = serverContext.getCommonAudit();
if (commonAudit.isExistingCommonAuditConfig(config))
{
commonAudit.removePublisher(config);
}
}
catch (ConfigException e)
{
LocalizedLogger.getLoggerForThisClass().traceException(e);
ccr.addMessage(ERR_CONFIG_LOGGER_CANNOT_DELETE_LOGGER.get(config.dn(), stackTraceToSingleLineString(e)));
ccr.setResultCode(DirectoryServer.getServerErrorResultCode());
}
}
else
{
ccr.setResultCode(ResultCode.NO_SUCH_OBJECT);
}
return ccr;
}
private boolean isJavaClassAcceptable(C config,
List<LocalizableMessage> unacceptableReasons)
{
String className = config.getJavaClass();
ClassPropertyDefinition pd = getJavaClassPropertyDefinition();
try {
P publisher = pd.loadClass(className, logPublisherClass).newInstance();
return publisher.isConfigurationAcceptable(config, unacceptableReasons);
} catch (Exception e) {
unacceptableReasons.add(invalidLoggerClassErrorMessage.get(className, config.dn(), e));
return false;
}
}
private P getLogPublisher(C config) throws ConfigException
{
String className = config.getJavaClass();
ClassPropertyDefinition pd = getJavaClassPropertyDefinition();
try {
P logPublisher = pd.loadClass(className, logPublisherClass).newInstance();
logPublisher.initializeLogPublisher(config, serverContext);
return logPublisher;
}
catch (Exception e)
{
throw new ConfigException(
invalidLoggerClassErrorMessage.get(className, config.dn(), e), e);
}
}
private P getLogPublisherForCommonAudit(C config) throws InitializationException, ConfigException
{
CommonAudit commonAudit = serverContext.getCommonAudit();
commonAudit.addOrUpdatePublisher(config);
P logPublisher = getLogPublisher(config);
CommonAuditLogPublisher publisher = (CommonAuditLogPublisher) logPublisher;
publisher.setRequestHandler(commonAudit.getRequestHandler(config));
return logPublisher;
}
}