| 1 | /********************************************************************** |
| 2 | * Copyright (c) 2012 Ericsson |
| 3 | * |
| 4 | * All rights reserved. This program and the accompanying materials are |
| 5 | * made available under the terms of the Eclipse Public License v1.0 which |
| 6 | * accompanies this distribution, and is available at |
| 7 | * http://www.eclipse.org/legal/epl-v10.html |
| 8 | * |
| 9 | * Contributors: |
| 10 | * Bernd Hufmann - Initial API and implementation |
| 11 | **********************************************************************/ |
| 12 | package org.eclipse.linuxtools.lttng.ui.views.control.handlers; |
| 13 | |
| 14 | import java.util.ArrayList; |
| 15 | import java.util.Iterator; |
| 16 | import java.util.List; |
| 17 | |
| 18 | import org.eclipse.core.commands.ExecutionEvent; |
| 19 | import org.eclipse.core.commands.ExecutionException; |
| 20 | import org.eclipse.core.runtime.IProgressMonitor; |
| 21 | import org.eclipse.core.runtime.IStatus; |
| 22 | import org.eclipse.core.runtime.Status; |
| 23 | import org.eclipse.core.runtime.jobs.Job; |
| 24 | import org.eclipse.jface.viewers.ISelection; |
| 25 | import org.eclipse.jface.viewers.StructuredSelection; |
| 26 | import org.eclipse.linuxtools.lttng.ui.LTTngUiPlugin; |
| 27 | import org.eclipse.linuxtools.lttng.ui.views.control.ControlView; |
| 28 | import org.eclipse.linuxtools.lttng.ui.views.control.Messages; |
| 29 | import org.eclipse.linuxtools.lttng.ui.views.control.model.TraceEnablement; |
| 30 | import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TraceChannelComponent; |
| 31 | import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TraceEventComponent; |
| 32 | import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TraceSessionComponent; |
| 33 | import org.eclipse.ui.IWorkbenchPage; |
| 34 | import org.eclipse.ui.IWorkbenchWindow; |
| 35 | import org.eclipse.ui.PlatformUI; |
| 36 | |
| 37 | /** |
| 38 | * <b><u>EnableChannelHandler</u></b> |
| 39 | * <p> |
| 40 | * Base Command handler implementation to enable or disabling a trace channel. |
| 41 | * </p> |
| 42 | */ |
| 43 | abstract public class ChangeEventStateHandler extends BaseControlViewHandler { |
| 44 | |
| 45 | // ------------------------------------------------------------------------ |
| 46 | // Attributes |
| 47 | // ------------------------------------------------------------------------ |
| 48 | /** |
| 49 | * Channel component reference. |
| 50 | */ |
| 51 | protected TraceChannelComponent fChannel = null; |
| 52 | /** |
| 53 | * The list of kernel channel components the command is to be executed on. |
| 54 | */ |
| 55 | protected List<TraceEventComponent> fEvents = new ArrayList<TraceEventComponent>(); |
| 56 | |
| 57 | // ------------------------------------------------------------------------ |
| 58 | // Accessors |
| 59 | // ------------------------------------------------------------------------ |
| 60 | /** |
| 61 | * @return the new state to set |
| 62 | */ |
| 63 | abstract protected TraceEnablement getNewState(); |
| 64 | |
| 65 | // ------------------------------------------------------------------------ |
| 66 | // Operations |
| 67 | // ------------------------------------------------------------------------ |
| 68 | /** |
| 69 | * Change the state |
| 70 | * @param channel - channel of events to be enabled |
| 71 | * @param eventNames - list event names |
| 72 | * @param monitor - a progress monitor |
| 73 | * @throws ExecutionException |
| 74 | */ |
| 75 | abstract protected void changeState(TraceChannelComponent channel, List<String> eventNames, IProgressMonitor monitor) throws ExecutionException; |
| 76 | |
| 77 | /* |
| 78 | * (non-Javadoc) |
| 79 | * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent) |
| 80 | */ |
| 81 | @Override |
| 82 | public Object execute(ExecutionEvent event) throws ExecutionException { |
| 83 | |
| 84 | IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow(); |
| 85 | |
| 86 | if (window == null) { |
| 87 | return false; |
| 88 | } |
| 89 | |
| 90 | Job job = new Job(Messages.TraceControl_ChangeChannelStateJob) { |
| 91 | @Override |
| 92 | protected IStatus run(IProgressMonitor monitor) { |
| 93 | String errorString = null; |
| 94 | |
| 95 | TraceSessionComponent session = null; |
| 96 | |
| 97 | try { |
| 98 | boolean isAll = false; |
| 99 | if (fChannel != null) { |
| 100 | session = fChannel.getSession(); |
| 101 | List<String> eventNames = new ArrayList<String>(); |
| 102 | for (Iterator<TraceEventComponent> iterator = fEvents.iterator(); iterator.hasNext();) { |
| 103 | // Enable/disable all selected channels which are disabled |
| 104 | TraceEventComponent event = (TraceEventComponent) iterator.next(); |
| 105 | |
| 106 | // Workaround for wildcard handling in lttng-tools |
| 107 | if ("*".equals(event.getName())) { //$NON-NLS-1$ |
| 108 | isAll = true; |
| 109 | } else { |
| 110 | eventNames.add(event.getName()); |
| 111 | } |
| 112 | } |
| 113 | if (isAll) { |
| 114 | changeState(fChannel, null, monitor); |
| 115 | } |
| 116 | |
| 117 | if (eventNames.size() > 0) { |
| 118 | changeState(fChannel, eventNames, monitor); |
| 119 | } |
| 120 | |
| 121 | for (Iterator<TraceEventComponent> iterator = fEvents.iterator(); iterator.hasNext();) { |
| 122 | // Enable all selected channels which are disabled |
| 123 | TraceEventComponent ev = (TraceEventComponent) iterator.next(); |
| 124 | ev.setState(getNewState()); |
| 125 | } |
| 126 | } |
| 127 | } catch (ExecutionException e) { |
| 128 | errorString = e.toString() + "\n"; //$NON-NLS-1$ |
| 129 | } |
| 130 | |
| 131 | // In all cases notify listeners |
| 132 | session.fireComponentChanged(session); |
| 133 | |
| 134 | if (errorString != null) { |
| 135 | return new Status(Status.ERROR, LTTngUiPlugin.PLUGIN_ID, errorString); |
| 136 | } |
| 137 | |
| 138 | return Status.OK_STATUS; |
| 139 | } |
| 140 | }; |
| 141 | job.setUser(true); |
| 142 | job.schedule(); |
| 143 | |
| 144 | return null; |
| 145 | } |
| 146 | |
| 147 | /* |
| 148 | * (non-Javadoc) |
| 149 | * @see org.eclipse.core.commands.AbstractHandler#isEnabled() |
| 150 | */ |
| 151 | @Override |
| 152 | public boolean isEnabled() { |
| 153 | // Get workbench page for the Control View |
| 154 | IWorkbenchPage page = getWorkbenchPage(); |
| 155 | if (page == null) { |
| 156 | return false; |
| 157 | } |
| 158 | |
| 159 | reset(); |
| 160 | |
| 161 | // Check if one or more session are selected |
| 162 | ISelection selection = page.getSelection(ControlView.ID); |
| 163 | if (selection instanceof StructuredSelection) { |
| 164 | StructuredSelection structered = ((StructuredSelection) selection); |
| 165 | String sessionName = null; |
| 166 | String channelName = null; |
| 167 | |
| 168 | for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) { |
| 169 | Object element = (Object) iterator.next(); |
| 170 | |
| 171 | if (element instanceof TraceEventComponent) { |
| 172 | |
| 173 | TraceEventComponent event = (TraceEventComponent) element; |
| 174 | if (sessionName == null) { |
| 175 | sessionName = String.valueOf(event.getSessionName()); |
| 176 | } |
| 177 | |
| 178 | if (fChannel == null) { |
| 179 | fChannel = (TraceChannelComponent)event.getParent(); |
| 180 | } |
| 181 | |
| 182 | if (channelName == null) { |
| 183 | channelName = event.getChannelName(); |
| 184 | } |
| 185 | |
| 186 | // Enable command only for events of same session, same channel and domain |
| 187 | if ((!sessionName.equals(event.getSessionName())) || |
| 188 | (!channelName.equals(event.getChannelName())) || |
| 189 | (fChannel.isKernel() != event.isKernel())) { |
| 190 | reset(); |
| 191 | break; |
| 192 | } |
| 193 | |
| 194 | if ((event.getState() != getNewState())) { |
| 195 | fEvents.add(event); |
| 196 | } |
| 197 | } |
| 198 | } |
| 199 | } |
| 200 | return fEvents.size() > 0; |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * Reset members |
| 205 | */ |
| 206 | private void reset() { |
| 207 | fChannel = null; |
| 208 | fEvents.clear(); |
| 209 | } |
| 210 | } |