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d60dfbe4 | 1 | /* |
301a3ddb | 2 | * Copyright (C) 2015 - EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com> |
d60dfbe4 AM |
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 java.nio.ByteBuffer; | |
22 | import java.nio.ByteOrder; | |
23 | ||
24 | import org.lttng.ust.agent.AbstractLttngAgent; | |
25 | ||
301a3ddb AM |
26 | /** |
27 | * Session daemon command indicating to the Java agent that some events were | |
28 | * enabled in the tracing session. | |
29 | * | |
30 | * @author Alexandre Montplaisir | |
31 | * @author David Goulet | |
32 | */ | |
33 | class SessiondEnableEventCommand implements ISessiondCommand { | |
d60dfbe4 AM |
34 | |
35 | private static final int INT_SIZE = 4; | |
36 | ||
37 | /** Event name to enable in the tracing session */ | |
301a3ddb | 38 | private final String eventName; |
d60dfbe4 | 39 | |
301a3ddb AM |
40 | public SessiondEnableEventCommand(byte[] data) { |
41 | if (data == null) { | |
42 | throw new IllegalArgumentException(); | |
43 | } | |
d60dfbe4 AM |
44 | int dataOffset = INT_SIZE * 2; |
45 | ||
46 | ByteBuffer buf = ByteBuffer.wrap(data); | |
47 | buf.order(ByteOrder.LITTLE_ENDIAN); | |
301a3ddb AM |
48 | buf.getInt(); // logLevel, currently unused |
49 | buf.getInt(); // logLevelType, currently unused | |
d60dfbe4 AM |
50 | eventName = new String(data, dataOffset, data.length - dataOffset).trim(); |
51 | } | |
52 | ||
53 | @Override | |
301a3ddb AM |
54 | public ILttngAgentResponse execute(AbstractLttngAgent<?> agent) { |
55 | boolean success = agent.eventEnabled(this.eventName); | |
56 | return (success ? ILttngAgentResponse.SUCESS_RESPONSE : ILttngAgentResponse.FAILURE_RESPONSE); | |
d60dfbe4 AM |
57 | } |
58 | } |