org.eclipse.linuxtools.lttng2.control.core/src/org/eclipse/linuxtools/internal/lttng2/control/core/relayd/lttngviewerCommands/GetMetadata.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_METADATA payload.
  21  *
  22  * @author Matthew Khouzam
  23  * @since 3.0
  24  */
  25 public class GetMetadata implements IRelayCommand {
  26
  27     /**
  28      * Command size (fStreamId)
  29      */
  30     public static final int SIZE = Long.SIZE / 8;
  31
  32     /**
  33      * The stream id
  34      */
  35     private final long fStreamId;
  36
  37     /**
  38      * Set the stream id
  39      *
  40      * @param streamId
  41      *            the stream id
  42      */
  43     public GetMetadata(long streamId) {
  44         fStreamId = streamId;
  45     }
  46
  47     /**
  48      * Get the stream id
  49      *
  50      * @return the stream id
  51      */
  52     public long getStreamId() {
  53         return fStreamId;
  54     }
  55
  56     @Override
  57     public byte[] serialize() {
  58         byte data[] = new byte[SIZE];
  59         ByteBuffer bb = ByteBuffer.wrap(data);
  60         bb.order(ByteOrder.BIG_ENDIAN);
  61         bb.putLong(getStreamId());
  62         return data;
  63     }
  64
  65 }