440 lines
15 KiB
Java
440 lines
15 KiB
Java
package org.gcube.smartgears.provider;
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import static org.gcube.smartgears.Constants.application_handlers_file_name;
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import static org.gcube.smartgears.Constants.configuration_file_path;
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import static org.gcube.smartgears.Constants.container_configuraton_file_path;
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import static org.gcube.smartgears.Constants.container_handlers_file_name;
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import static org.gcube.smartgears.Constants.container_handlers_file_path;
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import static org.gcube.smartgears.Constants.container_profile_file_path;
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import static org.gcube.smartgears.Constants.default_extensions_file_path;
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import static org.gcube.smartgears.Constants.default_handlers_file_path;
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import static org.gcube.smartgears.Constants.extensions_file_path;
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import static org.gcube.smartgears.Constants.ghn_home_env;
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import static org.gcube.smartgears.Constants.ghn_home_property;
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import static org.gcube.smartgears.Constants.handlers_file_path;
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import static org.gcube.smartgears.Constants.library_configuration_file_path;
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import static org.gcube.smartgears.Constants.profile_file_path;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.InputStream;
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import java.io.ObjectInputStream;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.HashSet;
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import java.util.UUID;
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import javax.servlet.ServletContext;
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import org.gcube.common.events.Hub;
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import org.gcube.common.events.impl.DefaultHub;
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import org.gcube.common.scan.ClasspathScanner;
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import org.gcube.common.scan.ClasspathScannerFactory;
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import org.gcube.common.scan.matchers.NameMatcher;
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import org.gcube.common.scan.resources.ClasspathResource;
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import org.gcube.informationsystem.publisher.RegistryPublisherFactory;
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import org.gcube.informationsystem.publisher.ScopedPublisher;
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import org.gcube.smartgears.configuration.Mode;
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import org.gcube.smartgears.configuration.application.ApplicationConfiguration;
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import org.gcube.smartgears.configuration.application.ApplicationConfigurationBinder;
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import org.gcube.smartgears.configuration.application.ApplicationExtensions;
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import org.gcube.smartgears.configuration.application.ApplicationHandlers;
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import org.gcube.smartgears.configuration.application.BridgedApplicationConfiguration;
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import org.gcube.smartgears.configuration.container.ContainerConfiguration;
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import org.gcube.smartgears.configuration.container.ContainerConfigurationBinder;
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import org.gcube.smartgears.configuration.container.ContainerHandlers;
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import org.gcube.smartgears.configuration.library.SmartGearsConfiguration;
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import org.gcube.smartgears.configuration.library.SmartGearsConfigurationBinder;
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import org.gcube.smartgears.context.Properties;
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import org.gcube.smartgears.context.application.ApplicationContext;
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import org.gcube.smartgears.context.application.DefaultApplicationContext;
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import org.gcube.smartgears.context.container.ContainerContext;
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import org.gcube.smartgears.context.container.DefaultContainerContext;
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import org.gcube.smartgears.lifecycle.application.ApplicationLifecycle;
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import org.gcube.smartgears.lifecycle.container.ContainerLifecycle;
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import org.gcube.smartgears.security.AuthorizationProvider;
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import org.gcube.smartgears.utils.Utils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* Default implementation of the {@link Provider} interface.
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*
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* @author Fabio Simeoni
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*
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*/
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public class DefaultProvider implements Provider {
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private static Logger log = LoggerFactory.getLogger(Provider.class);
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private ContainerContext containerContext;
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//TODO: do the same with applicationContext (with a map)
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private File configFile = null;
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protected DefaultProvider(File configFile) {
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this.configFile = configFile;
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}
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protected DefaultProvider(){};
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@Override
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public ContainerContext containerContext() {
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if(containerContext==null){
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ContainerConfiguration configuration = containerConfiguration();
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/*
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if (configuration.persistence()==null) {
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String location = Utils.home()+"/state";
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File dir = new File(location);
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if (!dir.exists())
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dir.mkdirs();
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configuration.persistence(new LocalPersistence(location));
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log.trace("setting persistence location for container @ {}",dir.getAbsolutePath());
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}*/
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Hub hub = new DefaultHub();
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ContainerLifecycle lifecycle = new ContainerLifecycle(hub);
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File file = configuration.persistence().file(container_profile_file_path);
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String id = null;
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if (file.exists()){
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log.info("loading persisted state for container");
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try(ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file))){
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id = (String)ois.readObject();
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}catch(Exception e){
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log.error("error loading persisted state, creating new uuid",e);
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}
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}
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if (id==null){
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id = UUID.randomUUID().toString();
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log.info("container id created is {}",id);
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}
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containerContext = new DefaultContainerContext(id, configuration, hub, lifecycle, new Properties());
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}
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return containerContext;
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}
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@Override
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public ContainerHandlers containerHandlers() {
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try {
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//TODO retrieve handler classes
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if (config == null)
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throw new IllegalStateException("invalid distribution: cannot find " + container_handlers_file_path);
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ContainerConfigurationBinder binder = new ContainerConfigurationBinder();
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ContainerHandlers defaultHandlers = binder.bindHandlers(config);
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ClassLoader currentClassLoader = Thread.currentThread().getContextClassLoader();
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if (currentClassLoader.getParent()!=null && !currentClassLoader.getParent().equals(ClassLoader.getSystemClassLoader())){
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log.trace("probably i'm in a webapp classloader");
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currentClassLoader = currentClassLoader.getParent();
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}
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try{
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if (currentClassLoader instanceof URLClassLoader){
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URL[] urls = ((URLClassLoader) currentClassLoader).getURLs() ;
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if (urls!=null && urls.length>0){
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ClasspathScanner scanner = ClasspathScannerFactory.scanner(new HashSet<URL>(Arrays.asList(urls)));
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Collection<ClasspathResource> resources = scanner.scan(new NameMatcher(container_handlers_file_name));
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for (URL url: urls)
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log.trace("URL: "+ url.toString());
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if (resources==null || resources.isEmpty())
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log.info("no custom container handlers found in the classpath");
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for (ClasspathResource res : resources){
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try{
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ContainerHandlers customHandlers= binder.bindHandlers(res.stream());
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defaultHandlers.mergeWith(customHandlers);
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log.trace("container hadlers found in {}",res.name());
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}catch(Exception e){
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log.warn("error loading not default container handlers {}",res.name(),e);
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}
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}
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}
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} else log.info("this classloader is not instance of {} : ",URLClassLoader.class.getName(), currentClassLoader.getClass().getName());
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}catch(Exception e){
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log.warn("cannot load custom handlers for container from the root classloader",e);
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}
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return defaultHandlers;
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} catch (RuntimeException e) {
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throw new RuntimeException("cannot install container handlers (see cause) ", e);
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}
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}
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@Override
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public ApplicationContext contextFor(ContainerContext context, ServletContext application) {
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ApplicationConfiguration configuration = null;
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ApplicationConfiguration embedded = configurationFor(application);
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ApplicationConfiguration external = context.configuration().app(application.getContextPath());
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//shouldn't happen: management shouldn't have started at all
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if (embedded==null && external==null)
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throw new AssertionError("application @ "+application.getContextPath()+" is not distributed with "
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+ configuration_file_path+" and there is no external configuration for it in "+container_configuraton_file_path);
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//no embedded configuration
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if (embedded == null) {
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configuration = external ;
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log.info("loaded configuration for application "+configuration.name()+" from "+container_configuraton_file_path);
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}
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else {
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configuration = embedded;
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if (external == null)
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log.info("loaded configuration for application "+configuration.name()+" from "+configuration_file_path);
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else {
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configuration.merge(external);
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log.info("loaded configuration for application "+configuration.name()+" from "+configuration_file_path+" and "+container_configuraton_file_path);
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}
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}
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ApplicationConfiguration bridgedConfiguration = new BridgedApplicationConfiguration(context.configuration(),
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configuration);
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Hub hub = new DefaultHub();
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ApplicationLifecycle lifecycle = new ApplicationLifecycle(hub, configuration.name());
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File file = bridgedConfiguration.persistence().file(profile_file_path);
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String id= null;
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if (file.exists()){
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log.info("loading persisted state for application {}", application.getContextPath());
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try(ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file))){
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id = (String)ois.readObject();
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}catch(Exception e){
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log.error("error loading persisted state, creating new uuid",e);
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}
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}
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if (id==null)
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id = UUID.randomUUID().toString();
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return new DefaultApplicationContext(id, context, application, bridgedConfiguration, hub, lifecycle,
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new Properties());
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}
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@Override
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public ApplicationHandlers handlersFor(ApplicationContext context) {
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try {
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// it's in a library, using
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InputStream defaultHandlersStream = getClass().getResourceAsStream(default_handlers_file_path);
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if (defaultHandlersStream == null)
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throw new IllegalStateException("invalid distribution: cannot find " + default_handlers_file_path);
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ApplicationConfigurationBinder binder = new ApplicationConfigurationBinder();
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ApplicationHandlers defaultHandlers = binder.bindHandlers(defaultHandlersStream);
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//searching for smartegars related application handlers in the common classloader
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ClassLoader currentClassLoader = Thread.currentThread().getContextClassLoader();
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if (currentClassLoader.getParent()!=null && !currentClassLoader.getParent().equals(ClassLoader.getSystemClassLoader())){
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log.trace("probably i'm in a webapp classloader");
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currentClassLoader = currentClassLoader.getParent();
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}
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try{
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if (currentClassLoader instanceof URLClassLoader){
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URL[] urls = ((URLClassLoader) currentClassLoader).getURLs() ;
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if (urls!=null && urls.length>0){
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ClasspathScanner scanner = ClasspathScannerFactory.scanner(new HashSet<URL>(Arrays.asList(urls)));
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Collection<ClasspathResource> resources = scanner.scan(new NameMatcher(application_handlers_file_name));
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if (resources==null || resources.isEmpty())
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log.info("no custom smartgears related application handlers found in the classpath");
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for (ClasspathResource res : resources){
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try{
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ApplicationHandlers customHandlers= binder.bindHandlers(res.stream());
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defaultHandlers.mergeWith(customHandlers);
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log.trace("application hadlers found in {}",res.name());
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}catch(Exception e){
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log.warn("error loading smartgears related application handlers {}",res.name(),e);
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}
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}
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}
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}
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}catch(Exception e){
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log.warn("cannot load smartgears related handlers for application from the root classloader",e);
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}
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InputStream appSpecificHandlersStream = context.application().getResourceAsStream(handlers_file_path);
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if (appSpecificHandlersStream !=null ){
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defaultHandlers.mergeWith(binder.bindHandlers(appSpecificHandlersStream));
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log.trace("{} uses default lifecycle with app spceific handler as it includes {}", context.name(), handlers_file_path);
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} else
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log.trace("{} uses the default lifecycle as it does not include {}", context.name(), handlers_file_path);
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return defaultHandlers;
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} catch (RuntimeException e) {
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throw new RuntimeException("cannot install handlers for application @ " + context.name()+" (see cause) ", e);
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}
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}
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@Override
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public ApplicationExtensions extensionsFor(ApplicationContext context) {
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try {
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InputStream config = context.application().getResourceAsStream(extensions_file_path);
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if (config == null) {
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log.trace("{} uses default extensions as it does not include {}", context.name(), extensions_file_path);
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// it's in a library, using
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config = getClass().getResourceAsStream(default_extensions_file_path);
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if (config == null)
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throw new IllegalStateException("invalid distribution: cannot find " + default_extensions_file_path);
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} else
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log.info("{} uses custom extensions @ {}", context.name(), extensions_file_path);
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ApplicationConfigurationBinder binder = new ApplicationConfigurationBinder();
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return binder.bindExtensions(config);
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} catch (RuntimeException e) {
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throw new RuntimeException("cannot install extensions for application @ " + context.name()+" (see cause) ", e);
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}
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}
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@Override
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public SmartGearsConfiguration smartgearsConfiguration() {
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try {
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InputStream config = getClass().getResourceAsStream(library_configuration_file_path);
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if (config == null)
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throw new IllegalStateException("invalid distribution: cannot find " + library_configuration_file_path);
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SmartGearsConfigurationBinder binder = new SmartGearsConfigurationBinder();
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SmartGearsConfiguration configuration = binder.bind(config);
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configuration.validate();
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return configuration;
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} catch (RuntimeException e) {
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throw new RuntimeException("cannot read library configuration (see cause) ", e);
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}
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}
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// helpers
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private ApplicationConfiguration configurationFor(ServletContext application) {
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try {
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InputStream config = application.getResourceAsStream(configuration_file_path);
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if (config == null)
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return null;
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ApplicationConfigurationBinder binder = new ApplicationConfigurationBinder();
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return binder.bind(config);
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} catch (RuntimeException e) {
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throw new RuntimeException("invalid configuration (see cause)", e);
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}
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}
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private ContainerConfiguration containerConfiguration() {
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if (configFile==null) {
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String home = Utils.home();
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if (home == null)
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throw new IllegalStateException("invalid node configuration: the environment variable " + ghn_home_env
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+ " or the system property " + ghn_home_property + " must be defined");
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File homeDir = new File(home);
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if (!(homeDir.exists() && homeDir.isDirectory() && homeDir.canRead() && homeDir.canWrite()))
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throw new IllegalStateException("invalid node configuration: home "+home+" does not exist or is not a directory or cannot be accessed in read/write mode");
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configFile = new File(homeDir,container_configuraton_file_path);
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log.trace("reading container configuration @ {} ", configFile.getAbsolutePath());
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}
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if (!(configFile.exists() && configFile.canRead()))
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throw new IllegalStateException("invalid node configuration: file "+configFile.getAbsolutePath()+" does not exist or cannot be accessed");
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ContainerConfiguration configuration;
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try (InputStream stream = new FileInputStream(configFile)){
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configuration= ContainerConfiguration.load(stream);
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}catch (Exception e) {
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throw new IllegalStateException("invalid node configuration: file "+configFile.getAbsolutePath()+" is invalid");
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}
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return configuration;
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}
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@Override
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public ScopedPublisher publisher() {
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return containerContext.configuration().mode()==Mode.online? RegistryPublisherFactory.scopedPublisher()
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: new OfflinePublisher();
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}
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@Override
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public AuthorizationProvider authorizationProvider() {
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return containerContext.configuration().authorizationProvider();
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}
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}
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