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

   1 /*
   2  * Copyright (C) 2015 - EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com>
   3  * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
   4  *
   5  * This library is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU Lesser General Public License, version 2.1 only,
   7  * as published by the Free Software Foundation.
   8  *
   9  * This library is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public License
  15  * along with this library; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 package org.lttng.ust.agent.client;
  20
  21 import org.lttng.ust.agent.AbstractLttngAgent;
  22
  23 /**
  24  * Interface to represent all commands sent from the session daemon to the Java
  25  * agent. The agent is then expected to execute the command and provide a
  26  * response.
  27  *
  28  * @author Alexandre Montplaisir
  29  */
  30 interface ISessiondCommand {
  31
  32         enum CommandType {
  33
  34                 /** List logger(s). */
  35                 CMD_LIST(1),
  36                 /** Enable logger by name. */
  37                 CMD_ENABLE(2),
  38                 /** Disable logger by name. */
  39                 CMD_DISABLE(3),
  40                 /** Registration done */
  41                 CMD_REG_DONE(4);
  42
  43                 private int code;
  44
  45                 private CommandType(int c) {
  46                         code = c;
  47                 }
  48
  49                 public int getCommandType() {
  50                         return code;
  51                 }
  52         }
  53
  54         /**
  55          * Execute the command handler's action on the specified tracing agent.
  56          *
  57          * @param agent
  58          *            The agent on which to execute the command
  59          * @return If the command completed successfully or not
  60          */
  61         public ILttngAgentResponse execute(AbstractLttngAgent<?> agent);
  62 }