org.eclipse.tracecompass.lttng2.control.core/src/org/eclipse/linuxtools/internal/lttng2/control/core/relayd/lttngviewerCommands/AttachSessionRequest.java

   1 /**********************************************************************
   2  * Copyright (c) 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  *   Matthew Khouzam - Initial implementation and API
  11  *   Marc-Andre Laperle - Initial implementation and API
  12  **********************************************************************/
  13
  14 package org.eclipse.linuxtools.internal.lttng2.control.core.relayd.lttngviewerCommands;
  15
  16 import java.nio.ByteBuffer;
  17 import java.nio.ByteOrder;
  18
  19 /**
  20  * VIEWER_ATTACH_SESSION payload.
  21  *
  22  * @author Matthew Khouzam
  23  * @since 3.0
  24  */
  25 public class AttachSessionRequest implements IRelayCommand {
  26
  27     /**
  28      * Command size
  29      *
  30      * fSessionId + fOffset + fSeek
  31      */
  32     public static final int SIZE = (Long.SIZE + Long.SIZE) / 8 + SeekCommand.SIZE;
  33     /** the id of a session */
  34     private final long fSessionId;
  35     /** unused for now */
  36     private final long fOffset;
  37     /** enum lttng_viewer_seek */
  38     private final SeekCommand fSeek;
  39
  40     /**
  41      * Attach session request constructor
  42      *
  43      * @param id
  44      *            the session id
  45      * @param seekCommand
  46      *            the seek command
  47      */
  48     public AttachSessionRequest(long id, SeekCommand seekCommand) {
  49         this(id, 0, seekCommand);
  50     }
  51
  52     /**
  53      * Attach session request constructor
  54      *
  55      * @param id
  56      *            the session id
  57      * @param offset
  58      *            unused for now
  59      * @param seekCommand
  60      *            the seek command
  61      */
  62
  63     public AttachSessionRequest(long id, int offset, SeekCommand seekCommand) {
  64         fSessionId = id;
  65         fOffset = offset;
  66         fSeek = seekCommand;
  67
  68     }
  69
  70     @Override
  71     public byte[] serialize() {
  72         byte data[] = new byte[SIZE];
  73         ByteBuffer bb = ByteBuffer.wrap(data);
  74         bb.order(ByteOrder.BIG_ENDIAN);
  75         bb.putLong(fSessionId);
  76         bb.putLong(fOffset);
  77         bb.putInt(fSeek.getCommand());
  78         return data;
  79     }
  80
  81 }