| /********************************************************************** |
| * Copyright (c) 2012, 2015 Ericsson |
| * |
| * All rights reserved. This program and the accompanying materials are |
| * made available under the terms of the Eclipse Public License 2.0 which |
| * accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Bernd Hufmann - Initial API and implementation |
| **********************************************************************/ |
| package org.eclipse.tracecompass.internal.lttng2.control.ui.views.handlers; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.core.runtime.jobs.Job; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.tracecompass.internal.lttng2.control.core.model.TraceSessionState; |
| import org.eclipse.tracecompass.internal.lttng2.control.ui.Activator; |
| import org.eclipse.tracecompass.internal.lttng2.control.ui.views.ControlView; |
| import org.eclipse.tracecompass.internal.lttng2.control.ui.views.messages.Messages; |
| import org.eclipse.tracecompass.internal.lttng2.control.ui.views.model.impl.TraceSessionComponent; |
| import org.eclipse.ui.IWorkbenchPage; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.PlatformUI; |
| |
| /** |
| * <p> |
| * Abstract command handler implementation to start or stop one or more trace sessions. |
| * </p> |
| * |
| * @author Bernd Hufmann |
| */ |
| public abstract class ChangeSessionStateHandler extends BaseControlViewHandler { |
| |
| // ------------------------------------------------------------------------ |
| // Attributes |
| // ------------------------------------------------------------------------ |
| /** |
| * The list of session components the command is to be executed on. |
| */ |
| protected List<TraceSessionComponent> fSessions = new ArrayList<>(); |
| |
| // ------------------------------------------------------------------------ |
| // Accessors |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * @return new required state. |
| */ |
| public abstract TraceSessionState getNewState(); |
| |
| // ------------------------------------------------------------------------ |
| // Operations |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * Performs the state change on given session. |
| * |
| * @param session |
| * - a session which state is to be changed |
| * @param monitor |
| * - a progress monitor |
| * @throws ExecutionException |
| * If the command fails |
| */ |
| public abstract void changeState(TraceSessionComponent session, IProgressMonitor monitor) throws ExecutionException; |
| |
| @Override |
| public Object execute(ExecutionEvent event) throws ExecutionException { |
| |
| IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow(); |
| |
| if (window == null) { |
| return false; |
| } |
| |
| fLock.lock(); |
| try { |
| |
| final List<TraceSessionComponent> sessions = new ArrayList<>(); |
| sessions.addAll(fSessions); |
| |
| Job job = new Job(Messages.TraceControl_ChangeSessionStateJob) { |
| @Override |
| protected IStatus run(IProgressMonitor monitor) { |
| try { |
| for (TraceSessionComponent session : sessions) { |
| |
| // Change state of selected sessions |
| changeState(session, monitor); |
| |
| // Set Session state |
| session.setSessionState(getNewState()); |
| session.fireComponentChanged(session); |
| } |
| } catch (ExecutionException e) { |
| return new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.TraceControl_ChangeSessionStateFailure, e); |
| } |
| return Status.OK_STATUS; |
| } |
| }; |
| job.setUser(true); |
| job.schedule(); |
| } finally { |
| fLock.unlock(); |
| } |
| return null; |
| } |
| |
| @Override |
| public boolean isEnabled() { |
| // Get workbench page for the Control View |
| IWorkbenchPage page = getWorkbenchPage(); |
| if (page == null) { |
| return false; |
| } |
| |
| List<TraceSessionComponent> sessions = new ArrayList<>(0); |
| |
| // Check if one or more session are selected |
| ISelection selection = page.getSelection(ControlView.ID); |
| if (selection instanceof StructuredSelection) { |
| StructuredSelection structered = ((StructuredSelection) selection); |
| for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) { |
| Object element = iterator.next(); |
| if (element instanceof TraceSessionComponent) { |
| // Add only TraceSessionComponents that are inactive and not destroyed |
| TraceSessionComponent session = (TraceSessionComponent) element; |
| if ((session.getSessionState() != getNewState()) && (!session.isDestroyed())) { |
| sessions.add(session); |
| } |
| } |
| } |
| } |
| boolean isEnabled = !sessions.isEmpty(); |
| fLock.lock(); |
| try { |
| fSessions.clear(); |
| if (isEnabled) { |
| fSessions = sessions; |
| } |
| } finally { |
| fLock.unlock(); |
| } |
| return isEnabled; |
| } |
| } |