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Embedded-Web 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:
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* recipient has the option to distribute your version of this file under
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*/
package fish.payara.appserver.monitoring.rest.service;
import com.sun.enterprise.config.serverbeans.Config;
import com.sun.enterprise.config.serverbeans.Domain;
import fish.payara.appserver.monitoring.rest.service.adapter.RestMonitoringAdapter;
import fish.payara.appserver.monitoring.rest.service.adapter.RestMonitoringEndpointDecider;
import java.beans.PropertyChangeEvent;
import java.util.ArrayList;
import java.util.List;
import jakarta.annotation.PostConstruct;
import jakarta.inject.Inject;
import jakarta.inject.Named;
import org.glassfish.api.admin.ServerEnvironment;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.runlevel.RunLevel;
import org.glassfish.internal.api.PostStartupRunLevel;
import org.glassfish.server.ServerEnvironmentImpl;
import org.jvnet.hk2.annotations.Optional;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.config.ConfigBeanProxy;
import org.jvnet.hk2.config.ConfigListener;
import org.jvnet.hk2.config.UnprocessedChangeEvent;
import org.jvnet.hk2.config.UnprocessedChangeEvents;
import fish.payara.appserver.monitoring.rest.service.configuration.RestMonitoringConfiguration;
/**
* The core service for the Rest Monitoring application. Handles starting and reconfiguration of the application.
* @author Andrew Pielage
*/
@Service(name = "rest-monitoring")
@RunLevel(PostStartupRunLevel.VAL)
public class RestMonitoringService implements ConfigListener {
public static final String DEFAULT_REST_MONITORING_APP_NAME = "__restmonitoring";
private boolean startAttempted = false;
private String contextRoot;
@Inject
@Named(ServerEnvironment.DEFAULT_INSTANCE_NAME)
@Optional
private RestMonitoringConfiguration restMonitoringConfiguration;
@Inject
private RestMonitoringAdapter restMonitoringAdapter;
@Inject
Domain domain;
@Inject
ServerEnvironmentImpl serverEnv;
@Inject
ServiceLocator habitat;
@PostConstruct
private void postConstruct() {
contextRoot = restMonitoringAdapter.getContextRoot();
restMonitoringConfiguration = habitat.getService(RestMonitoringConfiguration.class);
if (restMonitoringConfiguration.getEnabled().equals("true")) {
loadApplication();
}
}
private void loadApplication() {
startAttempted = true;
try {
new RestMonitoringLoader(restMonitoringAdapter, habitat, domain, serverEnv,
contextRoot, restMonitoringConfiguration.getApplicationName(),
restMonitoringAdapter.getVirtualServers()).start();
} catch (Exception ex) {
throw new RuntimeException("Unable to load rest monitoring!", ex);
}
}
private void loadApplication(boolean dynamicStart) {
startAttempted = true;
try {
new RestMonitoringLoader(restMonitoringAdapter, habitat, domain, serverEnv,
contextRoot, restMonitoringConfiguration.getApplicationName(),
restMonitoringAdapter.getVirtualServers(), dynamicStart).start();
} catch (Exception ex) {
throw new RuntimeException("Unable to load rest monitoring!", ex);
}
}
@Override
public UnprocessedChangeEvents changed(PropertyChangeEvent[] propertyChangeEvents) {
List unprocessedChanges = new ArrayList<>();
boolean dynamicStart = false;
for (PropertyChangeEvent propertyChangeEvent : propertyChangeEvents) {
// Check that the property change event is for us.
if (propertyChangeEvent.getSource().toString().equals("GlassFishConfigBean."
+ RestMonitoringConfiguration.class.getName()) && isCurrentInstanceMatchTarget(propertyChangeEvent)) {
// Check if the property has actually changed
if (!propertyChangeEvent.getOldValue().equals(propertyChangeEvent.getNewValue())) {
// If the application hasn't attempted to start yet
if (!startAttempted) {
// We can only get here if enabled was false at server start, so in the case of the enabled
// property, we don't need to compare it to the current value - it can only be true
if (propertyChangeEvent.getPropertyName().equals("enabled")) {
// Flag that we want to dynamically start Rest Monitoring
dynamicStart = true;
} else if (propertyChangeEvent.getPropertyName().equals("context-root")) {
// If we haven't attempted to start the app yet, grab the new context root
Config serverConfig = domain.getServerNamed(serverEnv.getInstanceName()).getConfig();
RestMonitoringEndpointDecider endpointDecider = new RestMonitoringEndpointDecider(serverConfig,
restMonitoringConfiguration);
contextRoot = endpointDecider.getContextRoot();
}
} else if (!propertyChangeEvent.getPropertyName().equals("security-enabled")) {
// If a startup has been attempted and the changed property isn't securityEnabled, throw an
// unprocessed change event as we need to restart
unprocessedChanges.add(new UnprocessedChangeEvent(propertyChangeEvent,
"Rest monitoring redeployment required"));
}
}
}
}
// This should only be true if rest monitoring was not enabled at startup, and we've just enabled the service
if (dynamicStart) {
loadApplication(true);
}
// If we need to restart, throw an unprocessed change event
if (unprocessedChanges.isEmpty()) {
return null;
} else {
return new UnprocessedChangeEvents(unprocessedChanges);
}
}
private boolean isCurrentInstanceMatchTarget(PropertyChangeEvent propertyChangeEvent) {
// If we are an instance then the change will apply to us as it has been
// replicated directly to us by the DAS
if (serverEnv.isInstance()) {
return true;
}
ConfigBeanProxy proxy = (ConfigBeanProxy) propertyChangeEvent.getSource();
// Find the config parent
while (proxy != null && !(proxy instanceof Config)) {
proxy = proxy.getParent();
}
if (proxy != null) {
// We have found a config node at the root
// If the root config is the das config return true
return ((Config)proxy).isDas();
}
return false;
}
}