org.eclipse.linuxtools.lttng2.control.core/src/org/eclipse/linuxtools/internal/lttng2/control/core/relayd/lttngviewerCommands/GetNextIndex.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_GET_NEXT_INDEX payload.
  21  *
  22  * @author Matthew Khouzam
  23  * @since 3.0
  24  */
  25 public class GetNextIndex implements IRelayCommand {
  26
  27     /**
  28      * Command size (fStreamId)
  29      */
  30     public static final int SIZE = Long.SIZE / 8;
  31     /**
  32      * the id of the stream
  33      */
  34     private final long fStreamId;
  35
  36     /**
  37      * Constructor
  38      *
  39      * @param streamId
  40      *            the index stream id
  41      */
  42     public GetNextIndex(long streamId) {
  43         fStreamId = streamId;
  44     }
  45
  46     /**
  47      * Gets the stream id
  48      *
  49      * @return the stream id
  50      */
  51     public long getStreamId() {
  52         return fStreamId;
  53     }
  54
  55     @Override
  56     public byte[] serialize() {
  57         byte data[] = new byte[SIZE];
  58         ByteBuffer bb = ByteBuffer.wrap(data);
  59         bb.order(ByteOrder.BIG_ENDIAN);
  60         bb.putLong(getStreamId());
  61         return data;
  62     }
  63
  64 }