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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 | } |