| /******************************************************************************* |
| * Copyright (c) 2010 BSI Business Systems Integration AG. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * BSI Business Systems Integration AG - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.scout.rt.server; |
| |
| import java.lang.reflect.UndeclaredThrowableException; |
| import java.security.AccessController; |
| import java.security.Principal; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| import javax.security.auth.Subject; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.NullProgressMonitor; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.scout.commons.LocaleThreadLocal; |
| import org.eclipse.scout.commons.StringUtility; |
| import org.eclipse.scout.commons.exception.ProcessingException; |
| import org.eclipse.scout.commons.exception.ProcessingStatus; |
| import org.eclipse.scout.commons.job.JobEx; |
| import org.eclipse.scout.commons.logger.IScoutLogger; |
| import org.eclipse.scout.commons.logger.ScoutLogManager; |
| import org.eclipse.scout.commons.serialization.SerializationUtility; |
| import org.eclipse.scout.rt.server.internal.Activator; |
| import org.eclipse.scout.rt.server.transaction.BasicTransaction; |
| import org.eclipse.scout.rt.server.transaction.ITransaction; |
| import org.eclipse.scout.rt.server.transaction.internal.ActiveTransactionRegistry; |
| import org.eclipse.scout.rt.shared.ScoutTexts; |
| import org.eclipse.scout.rt.shared.TextsThreadLocal; |
| |
| /** |
| * Perform a transaction on a {@link IServerSession}<br> |
| */ |
| public abstract class ServerJob extends JobEx implements IServerSessionProvider { |
| private static final IScoutLogger LOG = ScoutLogManager.getLogger(ServerJob.class); |
| |
| //use classloader from SerializationUtility in Server Job |
| private static final String customClassloaderProperty = "org.eclipse.scout.rt.server.customServerJobClassloader"; |
| private final IServerSession m_serverSession; |
| private Subject m_subject; |
| private long m_transactionSequence; |
| private final boolean m_useCostomClassLoader; |
| |
| /** |
| * Perform a transaction on a {@link IServerSession} within a security {@link Subject} (optional)<br> |
| * |
| * @param serverSession |
| * must not be null |
| */ |
| public ServerJob(String name, IServerSession serverSession) { |
| this(name, serverSession, null); |
| } |
| |
| /** |
| * Perform a transaction on a {@link IServerSession} within a security {@link Subject} (optional)<br> |
| * |
| * @param serverSession |
| * must not be null |
| * @param subject |
| * (optional) the job is run inside a {@link Subject#doAs(Subject, java.security.PrivilegedAction)} section |
| */ |
| public ServerJob(String name, IServerSession serverSession, Subject subject) { |
| super(name); |
| if (serverSession == null) { |
| throw new IllegalArgumentException("serverSession is null"); |
| } |
| m_serverSession = serverSession; |
| m_subject = subject; |
| m_useCostomClassLoader = isUseCustomClassloader(); |
| } |
| |
| private boolean isUseCustomClassloader() { |
| try { |
| return StringUtility.parseBoolean(Activator.getDefault().getBundle().getBundleContext().getProperty(customClassloaderProperty)); |
| } |
| catch (Exception e) { |
| return false; |
| } |
| } |
| |
| /** |
| * {@link ServerJob}s belong to the family of type {@link ServerJob}.class |
| */ |
| @Override |
| public boolean belongsTo(Object family) { |
| if (family == ServerJob.class) { |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public IServerSession getServerSession() { |
| return m_serverSession; |
| } |
| |
| public Subject getSubject() { |
| return m_subject; |
| } |
| |
| /** |
| * The subject can only be modified as long as the job is not scheduled |
| */ |
| public void setSubject(Subject subject) { |
| if (getState() != NONE) { |
| throw new IllegalStateException("This job is already scheduled/running"); |
| } |
| m_subject = subject; |
| } |
| |
| /** |
| * see {@link ITransaction#getTransactionSequence()} |
| */ |
| public long getTransactionSequence() { |
| return m_transactionSequence; |
| } |
| |
| /** |
| * see {@link ITransaction#getTransactionSequence()} |
| */ |
| public void setTransactionSequence(long seq) { |
| if (getState() != NONE) { |
| throw new IllegalStateException("This job is already scheduled/running"); |
| } |
| m_transactionSequence = seq; |
| } |
| |
| @Override |
| public boolean shouldSchedule() { |
| if (getServerSession() != null && getServerSession().isSingleThreadSession()) { |
| runNow(new NullProgressMonitor()); |
| return false; |
| } |
| else { |
| return super.shouldSchedule(); |
| } |
| } |
| |
| /** |
| * <p> |
| * All subsequent calls within {@link ServerJob#runTransaction(IProgressMonitor))} have the {@link IServerSession} set |
| * in their thread context. After execution completes, {@link IServerSession} is cleared from the thread context. |
| * </p> |
| * <p> |
| * By calling this method, a new transaction on {@link IServerSession} is created and automatically comitted after |
| * successful completion. |
| * </p> |
| * |
| * @param monitor |
| */ |
| @Override |
| public final IStatus runNow(IProgressMonitor monitor) { |
| return super.runNow(monitor); |
| } |
| |
| @Override |
| protected final IStatus run(final IProgressMonitor monitor) { |
| try { |
| if (m_subject != null) { |
| try { |
| return Subject.doAs( |
| m_subject, |
| new PrivilegedExceptionAction<IStatus>() { |
| @Override |
| public IStatus run() throws Exception { |
| return runTransactionWrapper(monitor); |
| } |
| } |
| ); |
| } |
| catch (PrivilegedActionException e) { |
| Throwable t = e.getCause(); |
| if (t instanceof ProcessingException) { |
| return ((ProcessingException) t).getStatus(); |
| } |
| else { |
| return new ProcessingStatus(t.getMessage(), t, 0, ProcessingStatus.ERROR); |
| } |
| } |
| } |
| else { |
| return runTransactionWrapper(monitor); |
| } |
| } |
| catch (Throwable t) { |
| if (t instanceof ProcessingException) { |
| return ((ProcessingException) t).getStatus(); |
| } |
| else { |
| return new ProcessingStatus(t.getMessage(), t, 0, ProcessingStatus.ERROR); |
| } |
| } |
| } |
| |
| private IStatus runTransactionWrapper(IProgressMonitor monitor) throws Exception { |
| ITransaction transaction = createNewTransaction(); |
| Map<Class, Object> backup = ThreadContext.backup(); |
| Locale oldLocale = LocaleThreadLocal.get(); |
| ScoutTexts oldTexts = TextsThreadLocal.get(); |
| ClassLoader oldContextClassLoader = Thread.currentThread().getContextClassLoader(); |
| try { |
| ThreadContext.putServerSession(m_serverSession); |
| ThreadContext.putTransaction(transaction); |
| LocaleThreadLocal.set(m_serverSession.getLocale()); |
| TextsThreadLocal.set(m_serverSession.getTexts()); |
| ActiveTransactionRegistry.register(transaction); |
| if (m_useCostomClassLoader) { |
| Thread.currentThread().setContextClassLoader(SerializationUtility.getClassLoader()); |
| } |
| // |
| IStatus status = runTransaction(monitor); |
| if (status == null) { |
| status = Status.OK_STATUS; |
| } |
| return status; |
| } |
| catch (Throwable t) { |
| if (t instanceof UndeclaredThrowableException) { |
| Throwable test = ((UndeclaredThrowableException) t).getUndeclaredThrowable(); |
| if (test != null) { |
| t = test; |
| } |
| } |
| if (t.getCause() instanceof ProcessingException) { |
| t = t.getCause(); |
| } |
| transaction.addFailure(t); |
| String contextMsg = "Identity=" + ServerJob.getIdentity() + ", Job=" + getName(); |
| ProcessingException pe; |
| if (t instanceof ProcessingException) { |
| pe = (ProcessingException) t; |
| pe.addContextMessage(contextMsg); |
| } |
| else { |
| pe = new ProcessingException(contextMsg, t); |
| } |
| throw pe; |
| } |
| finally { |
| ActiveTransactionRegistry.unregister(transaction); |
| if (transaction.hasFailures()) { |
| // xa rollback |
| try { |
| transaction.rollback(); |
| } |
| catch (Throwable t) { |
| LOG.error("Transaction rollback failed with exception.", t); |
| } |
| } |
| else { |
| // xa commit |
| boolean needRollback = false; |
| try { |
| if (transaction.commitPhase1()) { |
| transaction.commitPhase2(); |
| } |
| else { |
| needRollback = true; |
| } |
| } |
| catch (Throwable t) { |
| needRollback = true; |
| LOG.error("Transaction commit exception.", t); |
| } |
| if (needRollback) { |
| // rollback |
| try { |
| transaction.rollback(); |
| } |
| catch (Throwable t) { |
| LOG.error("Transaction rollback failed with exception.", t); |
| } |
| } |
| } |
| // xa release |
| try { |
| transaction.release(); |
| } |
| catch (Throwable t) { |
| LOG.warn(null, t); |
| } |
| // restore thread context |
| try { |
| ThreadContext.restore(backup); |
| } |
| catch (Throwable t) { |
| LOG.warn(null, t); |
| } |
| LocaleThreadLocal.set(oldLocale); |
| TextsThreadLocal.set(oldTexts); |
| Thread.currentThread().setContextClassLoader(oldContextClassLoader); |
| } |
| } |
| |
| protected abstract IStatus runTransaction(IProgressMonitor monitor) throws Exception; |
| |
| /** |
| * @return {@link ThreadContext#getServerSession()} |
| */ |
| public static final IServerSession getCurrentSession() { |
| return getCurrentSession(IServerSession.class); |
| } |
| |
| /** |
| * @return {@link ThreadContext#getServerSession()} and check if it matches the required type |
| */ |
| @SuppressWarnings("unchecked") |
| public static final <T extends IServerSession> T getCurrentSession(Class<T> type) { |
| IServerSession s = ThreadContext.getServerSession(); |
| if (s != null && type.isAssignableFrom(s.getClass())) { |
| return (T) s; |
| } |
| return null; |
| } |
| |
| /** |
| * Convenience to obtain name of current subjects first principal |
| */ |
| public static String getIdentity() { |
| Subject subject = Subject.getSubject(AccessController.getContext()); |
| if (subject != null) { |
| for (Principal p : subject.getPrincipals()) { |
| return p.getName(); |
| } |
| } |
| return "anonymous"; |
| } |
| |
| protected ITransaction createNewTransaction() { |
| return new BasicTransaction(getTransactionSequence()); |
| } |
| |
| } |
