org.eclipse.linuxtools.lttng2.kernel.core/src/org/eclipse/linuxtools/lttng2/kernel/core/trace/CtfKernelTrace.java

   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  *   Alexandre Montplaisir - Initial API and implementation
  11  ******************************************************************************/
  12
  13 package org.eclipse.linuxtools.lttng2.kernel.core.trace;
  14
  15 import java.io.File;
  16
  17 import org.eclipse.core.resources.IProject;
  18 import org.eclipse.core.resources.IResource;
  19 import org.eclipse.core.runtime.CoreException;
  20 import org.eclipse.linuxtools.ctf.core.trace.CTFReaderException;
  21 import org.eclipse.linuxtools.ctf.core.trace.CTFTrace;
  22 import org.eclipse.linuxtools.internal.lttng2.kernel.core.stateprovider.CtfKernelStateInput;
  23 import org.eclipse.linuxtools.tmf.core.TmfCommonConstants;
  24 import org.eclipse.linuxtools.tmf.core.ctfadaptor.CtfTmfTrace;
  25 import org.eclipse.linuxtools.tmf.core.exceptions.TmfTraceException;
  26 import org.eclipse.linuxtools.tmf.core.statesystem.IStateChangeInput;
  27 import org.eclipse.linuxtools.tmf.core.statesystem.StateSystemManager;
  28
  29 /**
  30  * This is the specification of CtfTmfTrace for use with LTTng 2.x kernel
  31  * traces. It uses the CtfKernelStateInput to generate the state history.
  32  *
  33  * @version 1.0
  34  * @author Alexandre Montplaisir
  35  */
  36 public class CtfKernelTrace extends CtfTmfTrace {
  37
  38     /**
  39      * The file name of the History Tree
  40      */
  41     public final static String HISTORY_TREE_FILE_NAME = "stateHistory.ht"; //$NON-NLS-1$
  42
  43     /**
  44      * ID of the state system we will build
  45      * @since 2.0
  46      * */
  47     public static final String STATE_ID = "org.eclipse.linuxtools.lttng2.kernel"; //$NON-NLS-1$
  48
  49     /**
  50      * Default constructor
  51      */
  52     public CtfKernelTrace() {
  53         super();
  54     }
  55
  56     @Override
  57     public boolean validate(final IProject project, final String path) {
  58         CTFTrace temp;
  59         /*
  60          * Make sure the trace is openable as a CTF trace. We do this here
  61          * instead of calling super.validate() to keep the reference to "temp".
  62          */
  63         try {
  64             temp = new CTFTrace(path);
  65         } catch (CTFReaderException e) {
  66             return false;
  67         }
  68
  69         /* Make sure the domain is "kernel" in the trace's env vars */
  70         String dom = temp.getEnvironment().get("domain"); //$NON-NLS-1$
  71         if (dom != null && dom.equals("\"kernel\"")) { //$NON-NLS-1$
  72             return true;
  73         }
  74         return false;
  75     }
  76
  77     @Override
  78     protected void buildStateSystem() throws TmfTraceException {
  79         /* Set up the path to the history tree file we'll use */
  80         IResource resource = this.getResource();
  81         String supplDirectory = null;
  82
  83         try {
  84             // get the directory where the history file will be stored.
  85             supplDirectory = resource.getPersistentProperty(TmfCommonConstants.TRACE_SUPPLEMENTARY_FOLDER);
  86         } catch (CoreException e) {
  87             throw new TmfTraceException(e.toString(), e);
  88         }
  89
  90         final File htFile = new File(supplDirectory + File.separator + HISTORY_TREE_FILE_NAME);
  91         final IStateChangeInput htInput = new CtfKernelStateInput(this);
  92
  93         this.ss = StateSystemManager.loadStateHistory(htFile, htInput, STATE_ID, false);
  94     }
  95 }