2 * Copyright (C) 2015, EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 package org
.lttng
.ust
.agent
.utils
;
21 import java
.util
.StringJoiner
;
23 import org
.lttng
.tools
.ILttngSession
;
24 import org
.lttng
.ust
.agent
.session
.EventRule
;
25 import org
.lttng
.ust
.agent
.session
.LogLevelSelector
;
28 * Factory class for {@link EventRule} objects, offering convenience methods
29 * that mimic the results of passing the given arguments on the command-line.
31 * @author Alexandre Montplaisir
33 public class EventRuleFactory
{
35 /** Name of the "all" (-a) event */
36 public static final String EVENT_NAME_ALL
= "*";
38 /** Log level set by default when it is not specified */
39 public final LogLevelSelector LOG_LEVEL_UNSPECIFIED
;
41 private final ILttngSession
.Domain domain
;
48 public EventRuleFactory(ILttngSession
.Domain domain
) {
50 LOG_LEVEL_UNSPECIFIED
= new LogLevelSelector(domain
.levelAllValue(), 0);
54 * Construct an event by only passing the event name on the command-line.
58 * @return The corresponding event rule
60 public EventRule
createRule(String eventName
) {
61 return new EventRule(eventName
, LOG_LEVEL_UNSPECIFIED
, filterStringFromEventName(eventName
));
65 * Construct and event rule by specifying the event name and log level.
69 * @param logLevelSelector
71 * @return The corresponding event rule
73 public EventRule
createRule(String eventName
, LogLevelSelector logLevelSelector
) {
74 StringJoiner sj
= new StringJoiner(") && (", "(", ")");
75 String filterStr
= sj
.add(filterStringFromEventName(eventName
))
76 .add(filterStringFromLogLevel(logLevelSelector
))
78 return new EventRule(eventName
, logLevelSelector
, filterStr
);
82 * Construct and event rule by specifying the event name, log level, and a
87 * @param logLevelSelector
90 * The filter string passed on the command-line
91 * @return The corresponding event rule
93 public EventRule
createRule(String eventName
, LogLevelSelector logLevelSelector
, String extraFilter
) {
94 StringJoiner sj1
= new StringJoiner(") && (", "(", ")");
96 sj1
.add(filterStringFromEventName(eventName
));
97 String firstPart
= sj1
.toString();
99 if (logLevelSelector
.equals(LOG_LEVEL_UNSPECIFIED
)) {
100 return new EventRule(eventName
, logLevelSelector
, firstPart
);
104 * If there is both a filter and a log level, the filter + event name is
107 StringJoiner sj2
= new StringJoiner(") && (", "(", ")");
109 sj2
.add(filterStringFromLogLevel(logLevelSelector
));
110 return new EventRule(eventName
, logLevelSelector
, sj2
.toString());
114 * Construct an event rule corresponding to enabling all (-a) events.
116 * @return The corresponding event rule
118 public EventRule
createRuleAllEvents() {
119 return new EventRule(EVENT_NAME_ALL
, LOG_LEVEL_UNSPECIFIED
, "");
122 private static String
filterStringFromEventName(String eventName
) {
123 return "logger_name == \"" + eventName
+ "\"";
126 private String
filterStringFromLogLevel(LogLevelSelector logLevelSelector
) {
127 StringBuilder sb
= new StringBuilder();
128 sb
.append("int_loglevel ");
130 switch (logLevelSelector
.getLogLevelType()) {
131 case LTTNG_EVENT_LOGLEVEL_RANGE
:
132 sb
.append(domain
.rangeOperator());
134 case LTTNG_EVENT_LOGLEVEL_SINGLE
:
137 case LTTNG_EVENT_LOGLEVEL_ALL
:
139 throw new IllegalArgumentException();
142 sb
.append(" " + logLevelSelector
.getLogLevel());
143 return sb
.toString();