2 * Copyright (C) 2015 - EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com>
3 * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
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.
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
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
19 package org
.lttng
.ust
.agent
.client
;
21 import java
.nio
.ByteBuffer
;
22 import java
.nio
.ByteOrder
;
23 import java
.util
.ArrayList
;
24 import java
.util
.List
;
26 import org
.lttng
.ust
.agent
.AbstractLttngAgent
;
29 * Session daemon command asking the Java agent to list its registered loggers,
30 * which corresponds to event names in the tracing session.
32 * @author Alexandre Montplaisir
33 * @author David Goulet
35 class SessiondListLoggersCommand
implements ISessiondCommand
{
38 public ILttngAgentResponse
execute(AbstractLttngAgent
<?
> agent
) {
39 final List
<String
> loggerList
= new ArrayList
<String
>();
42 for (String event
: agent
.listEnabledEvents()) {
43 loggerList
.add(event
);
44 dataSize
+= event
.length() + 1;
47 return new SessiondListLoggersResponse(loggerList
, dataSize
);
50 private static class SessiondListLoggersResponse
implements ILttngAgentResponse
{
52 private final static int SIZE
= 12;
54 private final List
<String
> loggers
;
55 private final int dataSize
;
57 public SessiondListLoggersResponse(List
<String
> loggers
, int dataSize
) {
58 this.loggers
= loggers
;
59 this.dataSize
= dataSize
;
63 public ReturnCode
getReturnCode() {
64 /* This command can't really fail */
65 return ILttngAgentResponse
.SUCESS_RESPONSE
.getReturnCode();
69 public byte[] getBytes() {
70 byte data
[] = new byte[SIZE
+ dataSize
];
71 ByteBuffer buf
= ByteBuffer
.wrap(data
);
72 buf
.order(ByteOrder
.BIG_ENDIAN
);
75 buf
.putInt(getReturnCode().getCode());
77 buf
.putInt(loggers
.size());
79 for (String logger
: loggers
) {
80 buf
.put(logger
.getBytes());
81 /* NULL terminated byte after the logger name. */