X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.cms%2Fsrc%2Forg%2Fargeo%2Fcms%2Finternal%2Fkernel%2FCmsState.java;h=789312625c54219f66d24af46281dfeb1740e36d;hb=cff23f8dd98a91cf74a098e11f6b941e74df2917;hp=f975d6cf861f319d4d8ab04f06cec98108c3cd18;hpb=b4c772a263e0f19f6c283dbbb87d04794072b284;p=lgpl%2Fargeo-commons.git diff --git a/org.argeo.cms/src/org/argeo/cms/internal/kernel/CmsState.java b/org.argeo.cms/src/org/argeo/cms/internal/kernel/CmsState.java index f975d6cf8..789312625 100644 --- a/org.argeo.cms/src/org/argeo/cms/internal/kernel/CmsState.java +++ b/org.argeo.cms/src/org/argeo/cms/internal/kernel/CmsState.java @@ -3,22 +3,15 @@ package org.argeo.cms.internal.kernel; import static bitronix.tm.TransactionManagerServices.getTransactionManager; import static bitronix.tm.TransactionManagerServices.getTransactionSynchronizationRegistry; import static java.util.Locale.ENGLISH; -import static org.argeo.cms.internal.kernel.KernelUtils.getFrameworkProp; -import static org.argeo.util.LocaleChoice.asLocaleList; -import static org.osgi.framework.Constants.FRAMEWORK_UUID; import java.io.File; -import java.io.IOException; import java.net.InetAddress; -import java.net.URI; import java.net.UnknownHostException; -import java.nio.file.DirectoryStream; -import java.nio.file.Files; -import java.nio.file.Path; -import java.util.Dictionary; -import java.util.Hashtable; +import java.nio.file.spi.FileSystemProvider; +import java.util.ArrayList; import java.util.List; import java.util.Locale; +import java.util.UUID; import javax.jcr.RepositoryFactory; import javax.transaction.TransactionManager; @@ -27,369 +20,204 @@ import javax.transaction.UserTransaction; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; -import org.apache.jackrabbit.core.RepositoryContext; import org.argeo.cms.CmsException; -import org.argeo.cms.maintenance.MaintenanceUi; -import org.argeo.jcr.ArgeoJcrConstants; +import org.argeo.cms.i18n.LocaleUtils; import org.argeo.node.NodeConstants; -import org.argeo.node.NodeDeployment; import org.argeo.node.NodeState; -import org.argeo.node.RepoConf; +import org.argeo.transaction.simple.SimpleTransactionManager; import org.argeo.util.LangUtils; -import org.eclipse.equinox.http.jetty.JettyConfigurator; -import org.eclipse.equinox.http.jetty.JettyConstants; -import org.eclipse.rap.rwt.application.ApplicationConfiguration; import org.osgi.framework.Bundle; import org.osgi.framework.BundleContext; import org.osgi.framework.Constants; import org.osgi.framework.FrameworkUtil; import org.osgi.framework.ServiceReference; -import org.osgi.service.cm.Configuration; -import org.osgi.service.cm.ConfigurationAdmin; -import org.osgi.service.cm.ConfigurationException; -import org.osgi.service.cm.ManagedService; import org.osgi.service.cm.ManagedServiceFactory; -import org.osgi.service.http.HttpService; -import org.osgi.service.metatype.MetaTypeProvider; -import org.osgi.service.useradmin.UserAdmin; -import org.osgi.util.tracker.ServiceTracker; -import org.osgi.util.tracker.ServiceTrackerCustomizer; import bitronix.tm.BitronixTransactionManager; import bitronix.tm.BitronixTransactionSynchronizationRegistry; import bitronix.tm.TransactionManagerServices; -public class CmsState implements NodeState, ManagedService { - private final Log log = LogFactory.getLog(CmsState.class); +public class CmsState implements NodeState { + private final static Log log = LogFactory.getLog(CmsState.class); private final BundleContext bc = FrameworkUtil.getBundle(CmsState.class).getBundleContext(); - // avoid dependency to RWT OSGi - private final static String PROPERTY_CONTEXT_NAME="contextName"; - // REFERENCES - private ConfigurationAdmin configurationAdmin; + private Long availableSince; // i18n private Locale defaultLocale; private List locales = null; - // Standalone services - private BitronixTransactionManager transactionManager; - private BitronixTransactionSynchronizationRegistry transactionSynchronizationRegistry; - private NodeRepositoryFactory repositoryFactory; - - // Security - private NodeUserAdmin userAdmin; - private RepositoryServiceFactory repositoryServiceFactory; - private RepositoryService repositoryService; - - // Deployment - private final CmsDeployment nodeDeployment = new CmsDeployment(); - - private boolean cleanState = false; - private URI nodeRepoUri = null; + private ThreadGroup threadGroup = new ThreadGroup("CMS"); + private KernelThread kernelThread; + private List stopHooks = new ArrayList<>(); + private final String stateUuid; + private final boolean cleanState; private String hostname; - public CmsState() { + public CmsState(String stateUuid) { + this.stateUuid = stateUuid; + String frameworkUuid = KernelUtils.getFrameworkProp(Constants.FRAMEWORK_UUID); + this.cleanState = stateUuid.equals(frameworkUuid); try { this.hostname = InetAddress.getLocalHost().getHostName(); } catch (UnknownHostException e) { - log.error("Cannot set hostname", e); + log.error("Cannot set hostname: " + e); } - } - @Override - public void updated(Dictionary properties) throws ConfigurationException { - if (properties == null) { - // TODO this should not happen anymore - this.cleanState = true; - if (log.isTraceEnabled()) - log.trace("Clean state"); - return; - } - String stateUuid = properties.get(NodeConstants.CN).toString(); - String frameworkUuid = KernelUtils.getFrameworkProp(Constants.FRAMEWORK_UUID); - this.cleanState = stateUuid.equals(frameworkUuid); + availableSince = System.currentTimeMillis(); + if (log.isDebugEnabled()) + log.debug("## CMS starting... stateUuid=" + this.stateUuid + (cleanState ? " (clean state) " : " ")); - try { - if (log.isDebugEnabled()) - log.debug("## CMS STARTED " + stateUuid + (cleanState ? " (clean state) " : " ") - + LangUtils.toJson(properties, true)); - configurationAdmin = bc.getService(bc.getServiceReference(ConfigurationAdmin.class)); - - nodeRepoUri = KernelUtils.getOsgiInstanceUri("repos/node"); - - // pre-requisite - initI18n(properties); - initTrackers(); - // standalone services - initTransactionManager(); - initRepositoryFactory(); - // UI - initUi(); - // Deployment - initDeployConfigs(properties); - initUserAdmin(); - initRepositories(properties); - initWebServer(); - initNodeDeployment(); - - // MetaTypeService metaTypeService = - // bc.getService(bc.getServiceReference(MetaTypeService.class)); - // MetaTypeInformation metaInfo = - // metaTypeService.getMetaTypeInformation(bc.getBundle()); - // String[] pids = metaInfo.getPids(); - // for (String pid : pids) { - // log.debug("MetaType PID : " + pid); - // ObjectClassDefinition ocd = - // metaInfo.getObjectClassDefinition(pid, null); - // log.debug(ocd.getID()); - // for (AttributeDefinition attr : - // ocd.getAttributeDefinitions(ObjectClassDefinition.ALL)) { - // log.debug(attr.getID()); - // } - // } - - } catch (Exception e) { - throw new CmsException("Cannot get configuration", e); - } - } + initI18n(); + initServices(); - private void initTrackers() { - new ServiceTracker(bc, HttpService.class, new PrepareHttpStc()).open(); - new ServiceTracker<>(bc, RepositoryContext.class, new RepositoryContextStc()).open(); + // kernel thread + kernelThread = new KernelThread(threadGroup, "Kernel Thread"); + kernelThread.setContextClassLoader(getClass().getClassLoader()); + kernelThread.start(); } - private void initI18n(Dictionary stateProps) { - Object defaultLocaleValue = stateProps.get(NodeConstants.I18N_DEFAULT_LOCALE); + private void initI18n() { + Object defaultLocaleValue = KernelUtils.getFrameworkProp(NodeConstants.I18N_DEFAULT_LOCALE); defaultLocale = defaultLocaleValue != null ? new Locale(defaultLocaleValue.toString()) : new Locale(ENGLISH.getLanguage()); - locales = asLocaleList(stateProps.get(NodeConstants.I18N_LOCALES)); - } - - private void initTransactionManager() { - bitronix.tm.Configuration tmConf = TransactionManagerServices.getConfiguration(); - tmConf.setServerId(getFrameworkProp(FRAMEWORK_UUID)); - - Bundle bitronixBundle = FrameworkUtil.getBundle(bitronix.tm.Configuration.class); - File tmBaseDir = bitronixBundle.getDataFile(KernelConstants.DIR_TRANSACTIONS); - File tmDir1 = new File(tmBaseDir, "btm1"); - tmDir1.mkdirs(); - tmConf.setLogPart1Filename(new File(tmDir1, tmDir1.getName() + ".tlog").getAbsolutePath()); - File tmDir2 = new File(tmBaseDir, "btm2"); - tmDir2.mkdirs(); - tmConf.setLogPart2Filename(new File(tmDir2, tmDir2.getName() + ".tlog").getAbsolutePath()); - transactionManager = getTransactionManager(); - transactionSynchronizationRegistry = getTransactionSynchronizationRegistry(); - // register - bc.registerService(TransactionManager.class, transactionManager, null); - bc.registerService(UserTransaction.class, transactionManager, null); - bc.registerService(TransactionSynchronizationRegistry.class, transactionSynchronizationRegistry, null); - } + locales = LocaleUtils.asLocaleList(KernelUtils.getFrameworkProp(NodeConstants.I18N_LOCALES)); + } + + private void initServices() { + // JTA + String tmType = KernelUtils.getFrameworkProp(NodeConstants.TRANSACTION_MANAGER, + NodeConstants.TRANSACTION_MANAGER_SIMPLE); + if (NodeConstants.TRANSACTION_MANAGER_SIMPLE.equals(tmType)) { + initSimpleTransactionManager(); + } else if (NodeConstants.TRANSACTION_MANAGER_BITRONIX.equals(tmType)) { + initBitronixTransactionManager(); + } else { + throw new CmsException("Usupported transaction manager type " + tmType); + } + + // POI +// POIXMLTypeLoader.setClassLoader(CTConnection.class.getClassLoader()); + + // Tika +// OpenDocumentParser odfParser = new OpenDocumentParser(); +// bc.registerService(Parser.class, odfParser, new Hashtable()); +// PDFParser pdfParser = new PDFParser(); +// bc.registerService(Parser.class, pdfParser, new Hashtable()); +// OOXMLParser ooxmlParser = new OOXMLParser(); +// bc.registerService(Parser.class, ooxmlParser, new Hashtable()); +// TesseractOCRParser ocrParser = new TesseractOCRParser(); +// ocrParser.setLanguage("ara"); +// bc.registerService(Parser.class, ocrParser, new Hashtable()); + + // JCR + RepositoryServiceFactory repositoryServiceFactory = new RepositoryServiceFactory(); + stopHooks.add(() -> repositoryServiceFactory.shutdown()); + bc.registerService(ManagedServiceFactory.class, repositoryServiceFactory, + LangUtils.dico(Constants.SERVICE_PID, NodeConstants.NODE_REPOS_FACTORY_PID)); - private void initRepositoryFactory() { - // TODO rationalise RepositoryFactory - repositoryFactory = new NodeRepositoryFactory(); - // register + NodeRepositoryFactory repositoryFactory = new NodeRepositoryFactory(); bc.registerService(RepositoryFactory.class, repositoryFactory, null); - } - private void initUi() { - bc.registerService(ApplicationConfiguration.class, new MaintenanceUi(), - LangUtils.init(PROPERTY_CONTEXT_NAME, "system")); - bc.registerService(ApplicationConfiguration.class, new UserUi(), - LangUtils.init(PROPERTY_CONTEXT_NAME, "user")); + // Security + NodeUserAdmin userAdmin = new NodeUserAdmin(NodeConstants.ROLES_BASEDN); + stopHooks.add(() -> userAdmin.destroy()); + bc.registerService(ManagedServiceFactory.class, userAdmin, + LangUtils.dico(Constants.SERVICE_PID, NodeConstants.NODE_USER_ADMIN_PID)); + + // File System + CmsFsProvider cmsFsProvider = new CmsFsProvider(); +// ServiceLoader fspSl = ServiceLoader.load(FileSystemProvider.class); +// for (FileSystemProvider fsp : fspSl) { +// log.debug("FileSystemProvider " + fsp); +// if (fsp instanceof CmsFsProvider) { +// cmsFsProvider = (CmsFsProvider) fsp; +// } +// } +// for (FileSystemProvider fsp : FileSystemProvider.installedProviders()) { +// log.debug("Installed FileSystemProvider " + fsp); +// } + bc.registerService(FileSystemProvider.class, cmsFsProvider, + LangUtils.dico(Constants.SERVICE_PID, NodeConstants.NODE_FS_PROVIDER_PID)); + } + + private void initSimpleTransactionManager() { + SimpleTransactionManager transactionManager = new SimpleTransactionManager(); + bc.registerService(TransactionManager.class, transactionManager, null); + bc.registerService(UserTransaction.class, transactionManager, null); + // TODO TransactionSynchronizationRegistry } - private void initDeployConfigs(Dictionary stateProps) throws IOException { - Path deployPath = KernelUtils.getOsgiInstancePath(KernelConstants.DIR_NODE + '/' + KernelConstants.DIR_DEPLOY); - Files.createDirectories(deployPath); - - Path nodeConfigPath = deployPath.resolve(NodeConstants.NODE_REPO_PID + ".properties"); - if (!Files.exists(nodeConfigPath)) { - Dictionary nodeConfig = getNodeConfig(stateProps); - nodeConfig.put(ArgeoJcrConstants.JCR_REPOSITORY_ALIAS, ArgeoJcrConstants.ALIAS_NODE); - nodeConfig.put(RepoConf.labeledUri.name(), nodeRepoUri.toString()); - LangUtils.storeAsProperties(nodeConfig, nodeConfigPath); + private void initBitronixTransactionManager() { + // TODO manage it in a managed service, as startup could be long + ServiceReference existingTm = bc.getServiceReference(TransactionManager.class); + if (existingTm != null) { + if (log.isDebugEnabled()) + log.debug("Using provided transaction manager " + existingTm); + return; } - if (cleanState) { - try (DirectoryStream ds = Files.newDirectoryStream(deployPath)) { - for (Path path : ds) { - if (Files.isDirectory(path)) {// managed factories - try (DirectoryStream factoryDs = Files.newDirectoryStream(path)) { - for (Path confPath : factoryDs) { - Configuration conf = configurationAdmin - .createFactoryConfiguration(path.getFileName().toString()); - Dictionary props = LangUtils.loadFromProperties(confPath); - conf.update(props); - } - } - } else {// managed services - String pid = path.getFileName().toString(); - pid = pid.substring(0, pid.length() - ".properties".length()); - Configuration conf = configurationAdmin.getConfiguration(pid); - Dictionary props = LangUtils.loadFromProperties(path); - conf.update(props); - } - } - } - } - } + if (!TransactionManagerServices.isTransactionManagerRunning()) { + bitronix.tm.Configuration tmConf = TransactionManagerServices.getConfiguration(); + tmConf.setServerId(UUID.randomUUID().toString()); - private void initUserAdmin() { - userAdmin = new NodeUserAdmin(); + Bundle bitronixBundle = FrameworkUtil.getBundle(bitronix.tm.Configuration.class); + File tmBaseDir = bitronixBundle.getDataFile(KernelConstants.DIR_TRANSACTIONS); + File tmDir1 = new File(tmBaseDir, "btm1"); + tmDir1.mkdirs(); + tmConf.setLogPart1Filename(new File(tmDir1, tmDir1.getName() + ".tlog").getAbsolutePath()); + File tmDir2 = new File(tmBaseDir, "btm2"); + tmDir2.mkdirs(); + tmConf.setLogPart2Filename(new File(tmDir2, tmDir2.getName() + ".tlog").getAbsolutePath()); + } + BitronixTransactionManager transactionManager = getTransactionManager(); + stopHooks.add(() -> transactionManager.shutdown()); + BitronixTransactionSynchronizationRegistry transactionSynchronizationRegistry = getTransactionSynchronizationRegistry(); // register - Dictionary props = userAdmin.currentState(); - props.put(Constants.SERVICE_PID, NodeConstants.NODE_USER_ADMIN_PID); - // TODO use ManagedService - bc.registerService(UserAdmin.class, userAdmin, props); + bc.registerService(TransactionManager.class, transactionManager, null); + bc.registerService(UserTransaction.class, transactionManager, null); + bc.registerService(TransactionSynchronizationRegistry.class, transactionSynchronizationRegistry, null); + if (log.isDebugEnabled()) + log.debug("Initialised default Bitronix transaction manager"); } - private void initRepositories(Dictionary stateProps) throws IOException { - // register - repositoryServiceFactory = new RepositoryServiceFactory(); - bc.registerService(ManagedServiceFactory.class, repositoryServiceFactory, - LangUtils.init(Constants.SERVICE_PID, NodeConstants.JACKRABBIT_FACTORY_PID)); + void shutdown() { + if (log.isDebugEnabled()) + log.debug("CMS stopping... stateUuid=" + this.stateUuid + (cleanState ? " (clean state) " : " ")); + + if (kernelThread != null) + kernelThread.destroyAndJoin(); + // In a different state in order to avois interruptions + new Thread(() -> applyStopHooks(), "Apply Argeo Stop Hooks").start(); + // applyStopHooks(); - repositoryService = new RepositoryService(); - Dictionary regProps = LangUtils.init(Constants.SERVICE_PID, NodeConstants.NODE_REPO_PID); - bc.registerService(LangUtils.names(ManagedService.class, MetaTypeProvider.class), repositoryService, regProps); + long duration = ((System.currentTimeMillis() - availableSince) / 1000) / 60; + log.info("## ARGEO CMS STOPPED after " + (duration / 60) + "h " + (duration % 60) + "min uptime ##"); } - private void initWebServer() { - String httpPort = getFrameworkProp("org.osgi.service.http.port"); - String httpsPort = getFrameworkProp("org.osgi.service.http.port.secure"); - try { - if (httpPort != null || httpsPort != null) { - final Hashtable jettyProps = new Hashtable(); - if (httpPort != null) { - jettyProps.put(JettyConstants.HTTP_PORT, httpPort); - jettyProps.put(JettyConstants.HTTP_ENABLED, true); - } - if (httpsPort != null) { - jettyProps.put(JettyConstants.HTTPS_PORT, httpsPort); - jettyProps.put(JettyConstants.HTTPS_ENABLED, true); - jettyProps.put(JettyConstants.SSL_KEYSTORETYPE, "PKCS12"); - // jettyProps.put(JettyConstants.SSL_KEYSTORE, - // nodeSecurity.getHttpServerKeyStore().getCanonicalPath()); - jettyProps.put(JettyConstants.SSL_PASSWORD, "changeit"); - jettyProps.put(JettyConstants.SSL_WANTCLIENTAUTH, true); - } - if (configurationAdmin != null) { - // TODO make filter more generic - String filter = "(" + JettyConstants.HTTP_PORT + "=" + httpPort + ")"; - if (configurationAdmin.listConfigurations(filter) != null) - return; - Configuration jettyConf = configurationAdmin - .createFactoryConfiguration(KernelConstants.JETTY_FACTORY_PID, null); - jettyConf.update(jettyProps); - - } else { - JettyConfigurator.startServer("default", jettyProps); - } + /** Apply shutdown hoos in reverse order. */ + private void applyStopHooks() { + for (int i = stopHooks.size() - 1; i >= 0; i--) { + try { + stopHooks.get(i).run(); + } catch (Exception e) { + log.error("Could not run shutdown hook #" + i); } - } catch (Exception e) { - throw new CmsException("Cannot initialize web server on " + httpPortsMsg(httpPort, httpsPort), e); } - } - - private void initNodeDeployment() throws IOException { - Configuration nodeDeploymentConf = configurationAdmin.getConfiguration(NodeConstants.NODE_DEPLOYMENT_PID); - nodeDeploymentConf.update(new Hashtable<>()); - } - - void shutdown() { - if (transactionManager != null) - transactionManager.shutdown(); - if (userAdmin != null) - userAdmin.destroy(); - if (repositoryServiceFactory != null) - repositoryServiceFactory.shutdown(); - // Clean hanging Gogo shell thread new GogoShellKiller().start(); - - if (log.isDebugEnabled()) - log.debug("## CMS STOPPED"); - } - - private Dictionary getNodeConfig(Dictionary properties) { - // Object repoType = properties.get(NodeConstants.NODE_REPO_PROP_PREFIX - // + RepoConf.type.name()); - // if (repoType == null) - // return null; - - Hashtable props = new Hashtable(); - for (RepoConf repoConf : RepoConf.values()) { - Object value = properties.get(NodeConstants.NODE_REPO_PROP_PREFIX + repoConf.name()); - if (value != null) - props.put(repoConf.name(), value); - } - return props; } - private class RepositoryContextStc implements ServiceTrackerCustomizer { - - @Override - public RepositoryContext addingService(ServiceReference reference) { - RepositoryContext nodeRepo = bc.getService(reference); - Object repoUri = reference.getProperty(ArgeoJcrConstants.JCR_REPOSITORY_URI); - if (repoUri != null && repoUri.equals(nodeRepoUri.toString())) { - nodeDeployment.setDeployedNodeRepository(nodeRepo.getRepository()); - Dictionary props = LangUtils.init(Constants.SERVICE_PID, - NodeConstants.NODE_DEPLOYMENT_PID); - props.put("uid", nodeRepo.getRootNodeId().toString()); - // register - bc.registerService(LangUtils.names(NodeDeployment.class, ManagedService.class), nodeDeployment, props); - } - - return nodeRepo; - } - - @Override - public void modifiedService(ServiceReference reference, RepositoryContext service) { - } - - @Override - public void removedService(ServiceReference reference, RepositoryContext service) { - } - + @Override + public boolean isClean() { + return cleanState; } - private class PrepareHttpStc implements ServiceTrackerCustomizer { - private DataHttp dataHttp; - private NodeHttp nodeHttp; - - @Override - public HttpService addingService(ServiceReference reference) { - HttpService httpService = addHttpService(reference); - return httpService; - } - - @Override - public void modifiedService(ServiceReference reference, HttpService service) { - } - - @Override - public void removedService(ServiceReference reference, HttpService service) { - dataHttp.destroy(); - dataHttp = null; - } - - private HttpService addHttpService(ServiceReference sr) { - HttpService httpService = bc.getService(sr); - // TODO find constants - Object httpPort = sr.getProperty("http.port"); - Object httpsPort = sr.getProperty("https.port"); - dataHttp = new DataHttp(httpService); - nodeHttp = new NodeHttp(httpService, bc); - if (log.isDebugEnabled()) - log.debug(httpPortsMsg(httpPort, httpsPort)); - return httpService; - } - + @Override + public Long getAvailableSince() { + return availableSince; } /* @@ -406,69 +234,4 @@ public class CmsState implements NodeState, ManagedService { public String getHostname() { return hostname; } - - /* - * STATIC - */ - private static String httpPortsMsg(Object httpPort, Object httpsPort) { - return "HTTP " + httpPort + (httpsPort != null ? " - HTTPS " + httpsPort : ""); - } - - /** Workaround for blocking Gogo shell by system shutdown. */ - private class GogoShellKiller extends Thread { - - public GogoShellKiller() { - super("Gogo shell killer"); - setDaemon(true); - } - - @Override - public void run() { - ThreadGroup rootTg = getRootThreadGroup(null); - Thread gogoShellThread = findGogoShellThread(rootTg); - if (gogoShellThread == null) - return; - while (getNonDaemonCount(rootTg) > 2) { - try { - Thread.sleep(100); - } catch (InterruptedException e) { - // silent - } - } - gogoShellThread = findGogoShellThread(rootTg); - if (gogoShellThread == null) - return; - System.exit(0); - } - } - - private static ThreadGroup getRootThreadGroup(ThreadGroup tg) { - if (tg == null) - tg = Thread.currentThread().getThreadGroup(); - if (tg.getParent() == null) - return tg; - else - return getRootThreadGroup(tg.getParent()); - } - - private static int getNonDaemonCount(ThreadGroup rootThreadGroup) { - Thread[] threads = new Thread[rootThreadGroup.activeCount()]; - rootThreadGroup.enumerate(threads); - int nonDameonCount = 0; - for (Thread t : threads) - if (t != null && !t.isDaemon()) - nonDameonCount++; - return nonDameonCount; - } - - private static Thread findGogoShellThread(ThreadGroup rootThreadGroup) { - Thread[] threads = new Thread[rootThreadGroup.activeCount()]; - rootThreadGroup.enumerate(threads, true); - for (Thread thread : threads) { - if (thread.getName().equals("Gogo shell")) - return thread; - } - return null; - } - }