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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 | **********************************************************************/ | |
115b4a01 | 12 | package org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers; |
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13 | |
14 | import java.util.ArrayList; | |
15 | import java.util.Iterator; | |
16 | import java.util.List; | |
17 | ||
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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; | |
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26 | import org.eclipse.linuxtools.internal.lttng2.ui.Activator; |
27 | import org.eclipse.linuxtools.internal.lttng2.ui.views.control.ControlView; | |
28 | import org.eclipse.linuxtools.internal.lttng2.ui.views.control.Messages; | |
29 | import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.TraceSessionState; | |
30 | import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.TraceSessionComponent; | |
bbb3538a | 31 | import org.eclipse.ui.IWorkbenchPage; |
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32 | import org.eclipse.ui.IWorkbenchWindow; |
33 | import org.eclipse.ui.PlatformUI; | |
34 | ||
35 | /** | |
36 | * <b><u>ChangeSessionStateHandler</u></b> | |
37 | * <p> | |
38 | * Abstract command handler implementation to start or stop one or more trace sessions. | |
39 | * </p> | |
40 | */ | |
498704b3 | 41 | abstract public class ChangeSessionStateHandler extends BaseControlViewHandler { |
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42 | |
43 | // ------------------------------------------------------------------------ | |
44 | // Attributes | |
45 | // ------------------------------------------------------------------------ | |
46 | /** | |
47 | * The list of session components the command is to be executed on. | |
48 | */ | |
49 | protected List<TraceSessionComponent> fSessions = new ArrayList<TraceSessionComponent>(); | |
50 | ||
51 | // ------------------------------------------------------------------------ | |
52 | // Accessors | |
53 | // ------------------------------------------------------------------------ | |
54 | ||
55 | /** | |
56 | * @return new required state. | |
57 | */ | |
58 | abstract TraceSessionState getNewState(); | |
59 | ||
60 | // ------------------------------------------------------------------------ | |
61 | // Operations | |
62 | // ------------------------------------------------------------------------ | |
63 | ||
64 | /** | |
65 | * Performs the state change on given session. | |
66 | * @param session - a session which state is to be changed | |
67 | * @param monitor - a progress monitor | |
68 | */ | |
69 | abstract public void changeState(TraceSessionComponent session, IProgressMonitor monitor) throws ExecutionException; | |
70 | ||
71 | /* | |
72 | * (non-Javadoc) | |
73 | * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent) | |
74 | */ | |
75 | @Override | |
76 | public Object execute(ExecutionEvent event) throws ExecutionException { | |
77 | ||
78 | IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow(); | |
79 | ||
80 | if (window == null) { | |
81 | return false; | |
82 | } | |
83 | ||
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84 | fLock.lock(); |
85 | try { | |
86 | ||
87 | final List<TraceSessionComponent> sessions = new ArrayList<TraceSessionComponent>(); | |
88 | sessions.addAll(fSessions); | |
bbb3538a | 89 | |
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90 | Job job = new Job(Messages.TraceControl_StartSessionJob) { |
91 | @Override | |
92 | protected IStatus run(IProgressMonitor monitor) { | |
93 | try { | |
94 | for (Iterator<TraceSessionComponent> iterator = sessions.iterator(); iterator.hasNext();) { | |
bbb3538a | 95 | |
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96 | // Start all selected sessions |
97 | TraceSessionComponent session = (TraceSessionComponent) iterator.next(); | |
98 | changeState(session, monitor); | |
99 | ||
100 | // Set Session state | |
101 | session.setSessionState(getNewState()); | |
102 | session.fireComponentChanged(session); | |
103 | } | |
104 | } catch (ExecutionException e) { | |
105 | return new Status(Status.ERROR, Activator.PLUGIN_ID, e.toString()); | |
106 | } | |
107 | return Status.OK_STATUS; | |
108 | } | |
109 | }; | |
110 | job.setUser(true); | |
111 | job.schedule(); | |
112 | } finally { | |
113 | fLock.unlock(); | |
114 | } | |
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115 | return null; |
116 | } | |
117 | ||
118 | /* | |
119 | * (non-Javadoc) | |
120 | * @see org.eclipse.core.commands.AbstractHandler#isEnabled() | |
121 | */ | |
122 | @Override | |
123 | public boolean isEnabled() { | |
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124 | // Get workbench page for the Control View |
125 | IWorkbenchPage page = getWorkbenchPage(); | |
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126 | if (page == null) { |
127 | return false; | |
128 | } | |
129 | ||
c56972bb | 130 | List<TraceSessionComponent> sessions = new ArrayList<TraceSessionComponent>(0); |
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131 | |
132 | // Check if one or more session are selected | |
133 | ISelection selection = page.getSelection(ControlView.ID); | |
134 | if (selection instanceof StructuredSelection) { | |
135 | StructuredSelection structered = ((StructuredSelection) selection); | |
136 | for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) { | |
137 | Object element = (Object) iterator.next(); | |
138 | if (element instanceof TraceSessionComponent) { | |
139 | // Add only TraceSessionComponents that are inactive and not destroyed | |
140 | TraceSessionComponent session = (TraceSessionComponent) element; | |
141 | if ((session.getSessionState() != getNewState()) && (!session.isDestroyed())) { | |
c56972bb | 142 | sessions.add(session); |
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143 | } |
144 | } | |
145 | } | |
146 | } | |
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147 | boolean isEnabled = !sessions.isEmpty(); |
148 | fLock.lock(); | |
149 | try { | |
150 | fSessions = null; | |
151 | if (isEnabled) { | |
152 | fSessions = sessions; | |
153 | } | |
154 | } finally { | |
155 | fLock.unlock(); | |
156 | } | |
157 | return isEnabled; | |
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158 | } |
159 | } |