| 1 | /* |
| 2 | * Copyright (C) 2015 - EfficiOS Inc., Alexandre Montplaisir <alexmonthy@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 | /** |
| 21 | * TCP client listener interface. |
| 22 | * |
| 23 | * This interface contains callbacks that are called when the TCP client |
| 24 | * receives commands from the session daemon. These callbacks will define what |
| 25 | * do to with each command. |
| 26 | * |
| 27 | * @author Alexandre Montplaisir |
| 28 | */ |
| 29 | public interface ILttngTcpClientListener { |
| 30 | |
| 31 | /** |
| 32 | * Callback for the TCP client to notify the listener agent that a request |
| 33 | * for enabling an event was sent from the session daemon. |
| 34 | * |
| 35 | * @param eventName |
| 36 | * The name of the event that was requested to be enabled. |
| 37 | * @return Since we do not track individual sessions, right now this command |
| 38 | * cannot fail. It will always return true. |
| 39 | */ |
| 40 | boolean eventEnabled(String eventName); |
| 41 | |
| 42 | /** |
| 43 | * Callback for the TCP client to notify the listener agent that a request |
| 44 | * for disabling an event was sent from the session daemon. |
| 45 | * |
| 46 | * @param eventName |
| 47 | * The name of the event that was requested to be disabled. |
| 48 | * @return True if the command completed successfully, false if we should |
| 49 | * report an error (event was not enabled, etc.) |
| 50 | */ |
| 51 | boolean eventDisabled(String eventName); |
| 52 | |
| 53 | /** |
| 54 | * List the all events currently enabled in the current tracing sessions. |
| 55 | * |
| 56 | * @return The list of enabled events |
| 57 | */ |
| 58 | Iterable<String> listEnabledEvents(); |
| 59 | } |