babeltrace2-query-babeltrace.support-info(7) — Linux manual page

NAME | DESCRIPTION | PARAMETERS | RESULT OBJECT | EXAMPLES | BUGS | RESOURCES | AUTHORS | COPYRIGHT | SEE ALSO | COLOPHON

BABELTRACE2-QUERY-(7)      Babeltrace 2 manual     BABELTRACE2-QUERY-(7)

NAME         top

       babeltrace2-query-babeltrace.support-info - Babeltrace 2's
       support info query object

DESCRIPTION         top

       The babeltrace.support-info Babeltrace 2 query object indicates,
       for a given source component class, whether or not its instance
       can handle a given input, and if so, what’s the confidence of
       this support.

       Said input can be a simple string, an existing file path, or an
       existing directory path. Components which expect some form of URI
       can handle a string input, while components which expect an
       existing file or directory can handle a file/directory path
       input.

       When the source component class’s query method replies that its
       component can handle a given input, it can also specify the name
       of a group in which to put that input. All the inputs of a given
       group, for a given component class, should be passed when
       instantiating the component class as its inputs initialization
       parameter (array of strings).

       The babeltrace2-convert(1) command queries this object from
       specific source component classes to find the most appropriate
       for a given non-option argument.

PARAMETERS         top

       input=INPUT [string]
           Check input INPUT.

           Depending on the type parameter, this is a simple string, a
           file path, or a directory path.

       type=(string | file | directory) [string]
           Input type, one of:

           string
               input parameter is a simple string.

           file
               input parameter is a file path.

           directory
               input parameter is a directory path.

               It is expected that the query method does not recurse
               into this directory: the result object indicates whether
               or not the component class supports this specific
               directory (input).

RESULT OBJECT         top

       The result object can be one of:

       •   A simple real value which is the weight, between 0 and 1, of
           the support by the component class for the given input.

           A weight of 0 means the input is unsupported while a weight
           of 1 means it’s fully supported. Any value in between shows
           how confident the component class is about the support of the
           given input.

       •   A map with a weight and an optional group name.

       When it’s a map, the expected entries are:

       group=GROUP-NAME [optional string]
           Put the given input into a group named GROUP-NAME for this
           component class.

           If this entry is missing, then the given input gets its own,
           unique group.

       weight=WEIGHT [real]
           Weight, between 0 and 1, of the support by the component
           class for the given input.

           The semantics are the same as when the result object is a
           simple real value.

EXAMPLES         top

   Query parameters
       Example 1. String input.

           input: net://relayd177/host/node23/active
           type: string

       Example 2. File path input.

           input: /home/user/traces/2019-08-26/quad.tr
           type: file

   Result object
       Example 3. Simple weight (unique group).

           0.5

       Example 4. Weight and specific group.

           group: 63a4b7e5-37f0-4254-a048-a0cff9e5b761
           weight: 0.75

       Example 5. Weight within a map (unique group).

           weight: 0.6

BUGS         top

       If you encounter any issue or usability problem, please report it
       on the Babeltrace bug tracker (see
       <https://bugs.lttng.org/projects/babeltrace>).

RESOURCES         top

       The Babeltrace project shares some communication channels with
       the LTTng project (see <https://lttng.org/>).

       •   Babeltrace website (see <https://babeltrace.org/>)

       •   Mailing list (see <https://lists.lttng.org>) for support and
           development: lttng-dev@lists.lttng.org

       •   IRC channel (see <irc://irc.oftc.net/lttng>): #lttng on
           irc.oftc.net

       •   Bug tracker (see
           <https://bugs.lttng.org/projects/babeltrace>)

       •   Git repository (see
           <https://git.efficios.com/?p=babeltrace.git>)

       •   GitHub project (see <https://github.com/efficios/babeltrace>)

       •   Continuous integration (see
           <https://ci.lttng.org/view/Babeltrace/>)

       •   Code review (see
           <https://review.lttng.org/q/project:babeltrace>)

AUTHORS         top

       The Babeltrace 2 project is the result of hard work by many
       regular developers and occasional contributors.

       The current project maintainer is Jérémie Galarneau
       <mailto:jeremie.galarneau@efficios.com>.

COPYRIGHT         top

       This query object is part of the Babeltrace 2 project.

       Babeltrace is distributed under the MIT license (see
       <https://opensource.org/licenses/MIT>).

SEE ALSO         top

       babeltrace2-intro(7), babeltrace2-query(1),
       babeltrace2-convert(1)

COLOPHON         top

       This page is part of the babeltrace (trace read and write
       libraries and a trace converter) project.  Information about the
       project can be found at ⟨http://www.efficios.com/babeltrace⟩.  If
       you have a bug report for this manual page, send it to
       lttng-dev@lists.lttng.org.  This page was obtained from the
       project's upstream Git repository
       ⟨git://git.efficios.com/babeltrace.git⟩ on 2021-08-27.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2021-08-20.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

Babeltrace 2.1.0-rc1        14 September 2019      BABELTRACE2-QUERY-(7)

Pages that refer to this page: babeltrace2-convert(1)babeltrace2-source.ctf.fs(7)babeltrace2-source.ctf.lttng-live(7)