git.lttng.org Git - lttng-ust.git/blob

   1 /*
   2  * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
   3  *
   4  * This library is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU Lesser General Public License, version 2.1 only,
   6  * as published by the Free Software Foundation.
   7  *
   8  * This library is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
  11  * for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this library; if not, write to the Free Software Foundation,
  15  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  16  */
  17
  18 package org.lttng.ust.agent.client;
  19
  20 import java.nio.ByteBuffer;
  21 import java.nio.ByteOrder;
  22
  23 class SessiondHeaderCommand implements ISessiondCommand {
  24
  25         /** ABI size of command header. */
  26         public static final int HEADER_SIZE = 16;
  27
  28         /** Payload size in bytes following this header. */
  29         private long dataSize;
  30         /** Command type. */
  31         private LttngAgentCommand cmd;
  32
  33         @Override
  34         public void populate(byte[] data) {
  35                 ByteBuffer buf = ByteBuffer.wrap(data);
  36                 buf.order(ByteOrder.BIG_ENDIAN);
  37
  38                 dataSize = buf.getLong();
  39                 cmd = LttngAgentCommand.values()[buf.getInt() - 1];
  40                 buf.getInt(); // command version, currently unused
  41         }
  42
  43         public long getDataSize() {
  44                 return dataSize;
  45         }
  46
  47         public LttngAgentCommand getCommandType() {
  48                 return cmd;
  49         }
  50 }