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package org.glassfish.resources.listener;
import com.sun.enterprise.config.serverbeans.*;
import com.sun.logging.LogDomains;
import org.glassfish.hk2.api.PostConstruct;
import org.glassfish.hk2.api.PreDestroy;
import org.glassfish.hk2.runlevel.RunLevel;
import org.glassfish.internal.api.ClassLoaderHierarchy;
import org.glassfish.internal.api.PostStartupRunLevel;
import org.glassfish.resourcebase.resources.api.ResourceDeployer;
import org.glassfish.resourcebase.resources.api.ResourceInfo;
import org.glassfish.resourcebase.resources.api.ResourcesBinder;
import org.glassfish.resourcebase.resources.ResourceTypeOrderProcessor;
import org.glassfish.resourcebase.resources.util.ResourceManagerFactory;
import org.glassfish.resourcebase.resources.util.ResourceUtil;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.config.*;
import javax.inject.Inject;
import javax.inject.Provider;
import javax.inject.Singleton;
import java.beans.PropertyChangeEvent;
import java.util.Collection;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Resource manager to bind various application or module scoped resources during
* startup, create/update/delete of resource/pool
* @author Jagadish Ramu
*/
@RunLevel(value=PostStartupRunLevel.VAL, mode=RunLevel.RUNLEVEL_MODE_NON_VALIDATING)
@Service(name="ApplicationScopedResourcesManager")
public class ApplicationScopedResourcesManager implements PostConstruct, PreDestroy, ConfigListener {
private static final Logger _logger = LogDomains.getLogger(ApplicationScopedResourcesManager.class,LogDomains.RESOURCE_BUNDLE);
@Inject
private ResourcesBinder resourcesBinder;
@Inject
private Provider<ResourceManagerFactory> resourceManagerFactoryProvider;
@Inject
private ClassLoaderHierarchy clh;
@Inject
private Applications applications;
@Inject
private ResourceTypeOrderProcessor resourceTypeOrderProcessor;
public void postConstruct() {
Collection<Application> apps = applications.getApplications();
if(apps != null){
for(Application app : apps){
Resources resources = app.getResources();
if(resources != null){
deployResources(resourceTypeOrderProcessor.getOrderedResources(resources.getResources()));
}
List<Module> modules = app.getModule();
if(modules != null){
for(Module module : modules){
Resources moduleResources = module.getResources();
if(moduleResources != null){
deployResources(new ResourceTypeOrderProcessor().getOrderedResources(moduleResources.getResources()));
}
}
}
}
}
}
public Resources getResources(String applicationName){
Application app = applications.getApplication(applicationName);
if(app != null){
return app.getResources();
}
return null;
}
public void deployResources(String applicationName){
Application app = applications.getApplication(applicationName);
if(app != null){
Resources appScopedResources = app.getResources();
if(appScopedResources != null){
deployResources(appScopedResources.getResources());
}
List<Module> modules = app.getModule();
if(modules != null){
for(Module module : modules){
Resources moduleScopedResources = module.getResources();
if(moduleScopedResources != null){
deployResources(moduleScopedResources.getResources());
}
}
}
}
}
/**
* deploy resources
* @param resources list
*/
public void deployResources(Collection<Resource> resources) {
if (resources != null) {
String applicationName = null;
String moduleName = null;
for (Resource resource : resources) {
Object parentObject = resource.getParent().getParent();
if(parentObject instanceof Application){
applicationName = ((Application)parentObject).getName();
}else if(parentObject instanceof Module){
moduleName = ((Module)parentObject).getName();
applicationName = ((Application)((Module)parentObject).getParent()).getName();
}
if (resource instanceof BindableResource) {
BindableResource bindableResource = (BindableResource) resource;
ResourceInfo resourceInfo =
new ResourceInfo(bindableResource.getJndiName(), applicationName, moduleName);
resourcesBinder.deployResource(resourceInfo, resource);
} else if (resource instanceof ResourcePool) {
// ignore, as they are loaded lazily
} else {
// only other resources left are RAC, CWSM
try {
getResourceDeployer(resource).deployResource(resource, applicationName, moduleName);
} catch (Exception e) {
Object[] params = {ResourceUtil.getGenericResourceInfo(resource), e};
_logger.log(Level.WARNING, "resources.resource-manager.deploy-resource-failed", params);
}
}
}
addListenerToResources(resources);
}
}
/**
* Do cleanup of system-resource-adapter, resources, pools
*/
public void preDestroy() {
}
public void undeployResources(String applicationName){
Application app = applications.getApplication(applicationName);
if(app != null){
List<Module> modules = app.getModule();
if(modules != null){
for(Module module : modules){
Resources moduleScopedResources = module.getResources();
if(moduleScopedResources != null){
undeployResources(moduleScopedResources);
}
}
}
Resources appScopedResources = app.getResources();
if(appScopedResources != null){
undeployResources(appScopedResources);
}
}
}
/**
* undeploy the given set of resources<br>
* resources (bindable) are removed first and then the pools
* @param resources list of resources
*/
public void undeployResources(Resources resources){
for(Resource resource : resources.getResources()){
//destroy all resources first and then pools
if(resource instanceof BindableResource){
// no need to undeploy resource-adapter-config as it (config) will be removed by the end of undeploy
// operation of the application.
undeployResource(resource);
}
}
Collection<ResourcePool> pools = resources.getResources(ResourcePool.class);
for(ResourcePool pool : pools){
undeployResource(pool);
}
}
private void undeployResource(Resource resource){
try{
getResourceDeployer(resource).undeployResource(resource);
}catch(Exception e){
Object[] params = {ResourceUtil.getGenericResourceInfo(resource), e};
_logger.log(Level.WARNING, "resources.resource-manager.undeploy-resource-failed", params);
}finally{
removeListenerFromResource(resource);
}
}
private void addListenerToResources(Collection<Resource> resources){
if(resources != null){
for(Resource resource : resources){
addListenerToResource(resource);
}
}
}
private void addListenerToResource(Resource instance) {
ObservableBean bean = null;
if(_logger.isLoggable(Level.FINEST)){
debug("adding listener : " + instance);
}
bean = (ObservableBean) ConfigSupport.getImpl((ConfigBeanProxy)instance);
bean.addListener(this);
}
/**
* Remove listener from all resources - JDBC Connection Pools/JDBC Resources/
* Connector Connection Pools/ Connector Resources.
* Invoked from preDestroy()
*/
private void removeListenerFromResources(Resources resources) {
if(resources != null){
for (Resource configuredResource : resources.getResources()) {
removeListenerFromResource(configuredResource);
}
}
}
/**
* Remove listener from a generic resource (JDBC Connection Pool/Connector
* Connection Pool/JDBC resource/Connector resource)
* Used in the case of delete asadmin command
* @param instance remove the resource from listening to resource events
*/
private void removeListenerFromResource(Resource instance) {
ObservableBean bean = null;
debug("removing listener : " + instance);
bean = (ObservableBean) ConfigSupport.getImpl((ConfigBeanProxy)instance);
bean.removeListener(this);
}
/**
* Given a <i>resource</i> instance, appropriate deployer will be provided
*
* @param resource resource instance
* @return ResourceDeployer
*/
private ResourceDeployer getResourceDeployer(Object resource){
return resourceManagerFactoryProvider.get().getResourceDeployer(resource);
}
private void debug(String message){
if (_logger.isLoggable(Level.FINEST)) {
_logger.finest("[ASR] [ApplicationScopedResourcesManager] " + message);
}
}
/**
* Notification that @Configured objects that were injected have changed
*
* @param events list of changes
*/
public UnprocessedChangeEvents changed(PropertyChangeEvent[] events) {
return ConfigSupport.sortAndDispatch(events, new ConfigChangeHandler(), _logger);
}
class ConfigChangeHandler implements Changed {
private ConfigChangeHandler() {
}
/**
* Notification of a change on a configuration object
*
* @param type CHANGE means the changedInstance has mutated.
* @param changedType type of the configuration object
* @param changedInstance changed instance.
*/
public <T extends ConfigBeanProxy> NotProcessed changed(Changed.TYPE type, Class<T> changedType,
T changedInstance) {
NotProcessed np ;
ClassLoader contextCL = Thread.currentThread().getContextClassLoader();
try {
//use connector-class-loader so as to get access to classes from resource-adapters
ClassLoader ccl = clh.getConnectorClassLoader(null);
Thread.currentThread().setContextClassLoader(ccl);
switch (type) {
case ADD:
np = handleAddEvent(changedInstance);
break;
case CHANGE:
np = handleChangeEvent(changedInstance);
break;
case REMOVE:
np = handleRemoveEvent(changedInstance);
break;
default:
np = new NotProcessed("Unrecognized type of change: " + type);
break;
}
return np;
} finally {
Thread.currentThread().setContextClassLoader(contextCL);
}
}
private <T extends ConfigBeanProxy> NotProcessed handleAddEvent(T instance) {
NotProcessed np = null;
if(instance instanceof Application){
Resources resources = ((Application)instance).getResources();
if(resources != null){
addListenerToResources(resources.getResources());
}
Application app = (Application)instance;
List<Module> modules = app.getModule();
if(modules != null){
for(Module module : modules){
if(module.getResources() !=null && module.getResources().getResources() != null){
addListenerToResources(module.getResources().getResources());
}
}
}
}
return np;
}
private <T extends ConfigBeanProxy> NotProcessed handleRemoveEvent(T instance) {
NotProcessed np = null;
if(instance instanceof Application){
removeListenerFromResources(((Application)instance).getResources());
Application app = (Application)instance;
List<Module> modules = app.getModule();
if(modules != null){
for(Module module : modules){
if(module.getResources() !=null && module.getResources().getResources() != null){
removeListenerFromResources(module.getResources());
}
}
}
}
return np;
}
private <T extends ConfigBeanProxy> NotProcessed handleChangeEvent(T instance) {
NotProcessed np = null;
//TODO V3 handle enabled / disabled /redeploy ?
debug("handling change event");
try {
if (ResourceUtil.isValidEventType(instance)) {
if(_logger.isLoggable(Level.FINEST)){
debug("redeploying resource : " + instance);
}
getResourceDeployer(instance).redeployResource(instance);
} else if (ResourceUtil.isValidEventType(instance.getParent())) {
if(_logger.isLoggable(Level.FINEST)){
debug("redeploying resource due to property change : " + instance.getParent());
}
//Added in case of a property change
//check for validity of the property's parent and redeploy
getResourceDeployer(instance.getParent()).redeployResource(instance.getParent());
}
} catch (Exception ex) {
final String msg = ApplicationScopedResourcesManager.class.getName() + " : " +
"Error while handling change Event";
_logger.severe(msg);
np = new NotProcessed(msg);
}
return np;
}
}
}