org.eclipse.tracecompass.lttng2.kernel.core/src/org/eclipse/tracecompass/lttng2/kernel/core/trace/LttngKernelTrace.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012, 2014 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  *   Matthew Khouzam - Improved validation
  12  ******************************************************************************/
  13
  14 package org.eclipse.tracecompass.lttng2.kernel.core.trace;
  15
  16 import java.nio.BufferOverflowException;
  17
  18 import org.eclipse.core.resources.IProject;
  19 import org.eclipse.core.runtime.IStatus;
  20 import org.eclipse.core.runtime.Status;
  21 import org.eclipse.tracecompass.ctf.core.trace.CTFReaderException;
  22 import org.eclipse.tracecompass.ctf.core.trace.CTFTrace;
  23 import org.eclipse.tracecompass.internal.lttng2.kernel.core.Activator;
  24 import org.eclipse.tracecompass.tmf.core.trace.TraceValidationStatus;
  25 import org.eclipse.tracecompass.tmf.ctf.core.trace.CtfTmfTrace;
  26
  27 /**
  28  * This is the specification of CtfTmfTrace for use with LTTng 2.x kernel
  29  * traces.
  30  *
  31  * @author Alexandre Montplaisir
  32  * @since 2.0
  33  */
  34 public class LttngKernelTrace extends CtfTmfTrace {
  35
  36     private static final int CONFIDENCE = 100;
  37
  38     /**
  39      * Default constructor
  40      */
  41     public LttngKernelTrace() {
  42         super();
  43     }
  44
  45     /**
  46      * {@inheritDoc}
  47      * <p>
  48      * This implementation sets the confidence to 100 if the trace is a valid
  49      * CTF trace in the "kernel" domain.
  50      */
  51     @Override
  52     public IStatus validate(final IProject project, final String path) {
  53         /*
  54          * Make sure the trace is openable as a CTF trace. We do this here
  55          * instead of calling super.validate() to keep the reference to "temp".
  56          */
  57         try (CTFTrace temp = new CTFTrace(path);) {
  58             /* Make sure the domain is "kernel" in the trace's env vars */
  59             String dom = temp.getEnvironment().get("domain"); //$NON-NLS-1$
  60             if (dom != null && dom.equals("\"kernel\"")) { //$NON-NLS-1$
  61                 return new TraceValidationStatus(CONFIDENCE, Activator.PLUGIN_ID);
  62             }
  63             return new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.LttngKernelTrace_DomainError);
  64
  65         } catch (CTFReaderException e) {
  66             return new Status(IStatus.ERROR, Activator.PLUGIN_ID, e.toString(), e);
  67         } catch (NullPointerException e) {
  68             return new Status(IStatus.ERROR, Activator.PLUGIN_ID, e.toString(), e);
  69         } catch (final BufferOverflowException e) {
  70             return new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.LttngKernelTrace_TraceReadError + ": " + Messages.LttngKernelTrace_MalformedTrace); //$NON-NLS-1$
  71         }
  72     }
  73
  74 }