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Micro Distribution of the Payara Project
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) [2016-2021] Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://github.com/payara/Payara/blob/master/LICENSE.txt
* See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* The Payara Foundation designates this particular file as subject to the "Classpath"
* exception as provided by the Payara Foundation in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package fish.payara.nucleus.notification;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyVetoException;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;
import jakarta.inject.Inject;
import jakarta.inject.Named;
import com.sun.enterprise.config.serverbeans.Config;
import org.glassfish.api.StartupRunLevel;
import org.glassfish.api.admin.ServerEnvironment;
import org.glassfish.api.event.EventListener;
import org.glassfish.api.event.EventTypes;
import org.glassfish.api.event.Events;
import org.glassfish.hk2.api.ServiceHandle;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.api.messaging.MessageReceiver;
import org.glassfish.hk2.api.messaging.SubscribeTo;
import org.glassfish.hk2.extras.ExtrasUtilities;
import org.glassfish.hk2.runlevel.RunLevel;
import org.glassfish.internal.api.Globals;
import org.jvnet.hk2.annotations.Optional;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.config.Changed;
import org.jvnet.hk2.config.ConfigBeanProxy;
import org.jvnet.hk2.config.ConfigListener;
import org.jvnet.hk2.config.ConfigSupport;
import org.jvnet.hk2.config.NotProcessed;
import org.jvnet.hk2.config.SingleConfigCode;
import org.jvnet.hk2.config.TransactionFailure;
import org.jvnet.hk2.config.Transactions;
import org.jvnet.hk2.config.UnprocessedChangeEvents;
import fish.payara.internal.notification.NotifierManager;
import fish.payara.internal.notification.NotifierUtils;
import fish.payara.internal.notification.PayaraConfiguredNotifier;
import fish.payara.internal.notification.PayaraNotification;
import fish.payara.internal.notification.PayaraNotifier;
import fish.payara.internal.notification.PayaraNotifierConfiguration;
import fish.payara.internal.notification.admin.NotificationServiceConfiguration;
import fish.payara.nucleus.notification.log.LogNotifierConfiguration;
/**
* Main service class that received {@link #notify(PayaraNotification)} HK2
* events, and distributes them to notifiers discovered by the service.
*
* @author mertcaliskan
* @author Matthew Gill
*/
@Service(name = "notification-service")
@RunLevel(StartupRunLevel.VAL)
@MessageReceiver
public class NotificationService implements NotifierManager, EventListener, ConfigListener {
private static final Logger logger = Logger.getLogger(NotificationService.class.getName());
@Inject
@Named(ServerEnvironment.DEFAULT_INSTANCE_NAME)
@Optional
private NotificationServiceConfiguration configuration;
@Inject
private ServiceLocator serviceLocator;
@Inject
private Events events;
@Inject
private Transactions transactions;
private final Set notifiers;
private boolean isInstance;
private boolean enabled;
public NotificationService() {
this.notifiers = new HashSet<>();
// done in constructor to ensure that topics are valid for injection
ExtrasUtilities.enableTopicDistribution(Globals.getDefaultHabitat());
}
@PostConstruct
void initialize() {
// Get the config if it's not been injected
if (configuration == null) {
configuration = serviceLocator.getService(NotificationServiceConfiguration.class);
}
// Register an event listener
if (events != null) {
events.register(this);
}
// Is this service running on an instance?
final ServerEnvironment env = serviceLocator.getService(ServerEnvironment.class);
isInstance = env.isInstance();
// Find and register all notifier services
final List> notifierHandles = serviceLocator.getAllServiceHandles(PayaraNotifier.class);
for (ServiceHandle handle : notifierHandles) {
NotifierHandler handler;
final boolean isNotifierConfigurable = handle
.getActiveDescriptor()
.getAdvertisedContracts()
.contains(PayaraConfiguredNotifier.class.getName());
if (isNotifierConfigurable) {
PayaraNotifierConfiguration notifierConfig = getOrCreateNotifierConfiguration(handle);
handler = new NotifierHandler(handle, notifierConfig);
} else {
handler = new NotifierHandler(handle);
}
notifiers.add(handler);
}
}
@PreDestroy
void destroy() {
notifiers.clear();
if (events != null) {
events.unregister(this);
}
}
@Override
public void event(Event event) {
if (event.is(EventTypes.SERVER_READY)) {
bootstrapNotificationService();
}
if (event.is(EventTypes.SERVER_SHUTDOWN)) {
shutdownNotificationService();
}
transactions.addListenerForType(NotificationServiceConfiguration.class, this);
}
public void shutdownNotificationService() {
notifiers.forEach(NotifierHandler::destroy);
}
public void bootstrapNotificationService() {
if (configuration != null) {
final boolean wasEnabled = this.enabled;
this.enabled = Boolean.valueOf(configuration.getEnabled());
if (this.enabled) {
// Configure the log notifier by default
final List notifierConfigurations = configuration.getNotifierConfigurationList();
if (notifierConfigurations != null && notifierConfigurations.isEmpty()) {
try {
ConfigSupport.apply(new SingleConfigCode() {
@Override
public Object run(final NotificationServiceConfiguration configurationProxy)
throws PropertyVetoException, TransactionFailure {
LogNotifierConfiguration notifierConfiguration = configurationProxy.createChild(LogNotifierConfiguration.class);
notifierConfiguration.enabled(true);
configurationProxy.getNotifierConfigurationList().add(notifierConfiguration);
return configurationProxy;
}
}, configuration);
} catch (TransactionFailure e) {
logger.log(Level.SEVERE, "Error occurred while setting initial log notifier configuration", e);
}
}
// Bootstrap each notifier
notifiers.forEach(NotifierHandler::bootstrap);
logger.info("Payara Notification Service bootstrapped.");
} else if (wasEnabled) {
shutdownNotificationService();
}
}
}
public void notify(@SubscribeTo PayaraNotification event) {
if (enabled) {
final List blacklist = event.getNotifierBlacklist();
final List whitelist = event.getNotifierWhitelist();
for (NotifierHandler handler : notifiers) {
final String notifierName = handler.getName();
if (blacklist != null && blacklist.contains(notifierName)) {
continue;
}
if (whitelist != null && !whitelist.contains(notifierName)) {
continue;
}
handler.accept(event);
}
}
}
@Override
public void reconfigureNotifier(PayaraNotifierConfiguration configuration) {
if (!enabled || configuration == null) {
return;
}
for (NotifierHandler handler : notifiers) {
final PayaraNotifierConfiguration notifierConfig = handler.getConfig();
if (notifierConfig != null && notifierConfig.getClass().isAssignableFrom(configuration.getClass())) {
handler.reconfigure();
return;
}
}
}
@Override
public UnprocessedChangeEvents changed(PropertyChangeEvent[] events) {
boolean isCurrentInstanceMatchTarget = false;
if (isInstance) {
isCurrentInstanceMatchTarget = true;
} else {
for (PropertyChangeEvent pe : events) {
ConfigBeanProxy proxy = (ConfigBeanProxy) pe.getSource();
while (proxy != null && !(proxy instanceof Config)) {
proxy = proxy.getParent();
}
if (proxy != null && ((Config) proxy).isDas()) {
isCurrentInstanceMatchTarget = true;
break;
}
}
}
if (isCurrentInstanceMatchTarget) {
return ConfigSupport.sortAndDispatch(events, new Changed() {
@Override
public NotProcessed changed(TYPE type, Class changedType, T changedInstance) {
if (changedType.equals(NotificationServiceConfiguration.class)) {
configuration = (NotificationServiceConfiguration) changedInstance;
}
return null;
}
}, logger);
}
return null;
}
private PayaraNotifierConfiguration getOrCreateNotifierConfiguration(ServiceHandle handle) {
final Class configClass = NotifierUtils.getConfigurationClass(handle.getActiveDescriptor().getImplementationClass());
if (configuration.getNotifierConfigurationByType(configClass) == null) {
try {
ConfigSupport.apply(new SingleConfigCode() {
@Override
public Object run(final NotificationServiceConfiguration configurationProxy)
throws PropertyVetoException, TransactionFailure {
final PayaraNotifierConfiguration config = configurationProxy.createChild(configClass);
configurationProxy.getNotifierConfigurationList().add(config);
return config;
}
}, configuration);
} catch (TransactionFailure e) {
logger.log(Level.SEVERE, "Error occurred while setting initial notifier configuration", e);
}
}
return configuration.getNotifierConfigurationByType(configClass);
}
}