Hihi, Kienan,
I finally find a workaround. I could success with the following code:
file_name = "bt_plugin_latency_filter.py"
current_directory=os.getcwd()
file_path = os.path.join(current_directory, file_name)
pset=bt2.find_plugins_in_path(file_path)
forplugininpset:
if plugin.name=="latency_filter"and hasattr(plugin,"filter_component_classes"):
latency_filter_comp_cls=plugin.filter_component_classes['LatencyFilter']
But loading the whole directory, it just doesnt work from command line.
Amanda
________________________________
From: Kienan Stewart <kstew...@efficios.com>
Sent: Thursday, April 25, 2024 11:43:05 PM
To: Wu, Yannan; lttng-dev@lists.lttng.org
Subject: RE: [EXTERNAL] [lttng-dev] [babeltrace2]about python self-defined
plugin loading
CAUTION: This email originated from outside of the organization. Do not click
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My apologies,
there is a typo in my previous e-mail, the library directory should be:
`<libdir>/babeltrace2/plugin-providers/'
thanks,
kienan
On 4/25/24 11:41 AM, Kienan Stewart via lttng-dev wrote:
> Hi Amanda,
>
> could you double-check to ensure that babeltrace2 was built with
> `--enable-python-plugins`, and that `import bt2` works?
>
> There should be a babeltrace2-python-plugin-provider.so in
> `<libdir>/babeltrace2/plugin-provides`
>
> thanks,
> kienan
>
>
> On 4/24/24 11:28 PM, Wu, Yannan via lttng-dev wrote:
>> Hi, There,
>>
>> I am trying to construct a customized filter and sink based on
>> babeltrace2 python binding. However, nether mine plugin nor the
>> plugins sample I could find on the internet all dont work.
>>
>> For example,
>> https://github.com/simark/babeltrace-fun-plugins/tree/master/my-first-components
>>
>> <https://github.com/simark/babeltrace-fun-plugins/tree/master/my-first-components>
>>
>> I just downloaded the py file and run the exact command, it failed.
>> The log is as following:
>>
>>
>> babeltrace2 --plugin-path . -c source.demo.MyFirstSource -c
>> sink.demo.MyFirstSink
>> 04-24 16:52:04.349 919805 919805 E CLI
>> add_descriptor_to_component_descriptor_set@babeltrace2.c:1720 Cannot
>> find component class: plugin-name="demo",
>> comp-cls-name="MyFirstSource", comp-cls-type=1
>> 04-24 16:52:04.349 919805 919805 E CLI
>> cmd_run_ctx_init@babeltrace2.c:1882 Cannot find an operative message
>> interchange protocol version to use to create the `run` command's
>> graph: status=ERROR
>> 04-24 16:52:04.349 919805 919805 E CLI cmd_run@babeltrace2.c:2465
>> Cannot initialize the command's context.
>>
>> ERROR: [Babeltrace CLI] (babeltrace2.c:2465)
>> Cannot initialize the command's context.
>> CAUSED BY [Babeltrace CLI] (babeltrace2.c:1882)
>> Cannot find an operative message interchange protocol version to
>> use to create the `run` command's graph: status=ERROR
>> CAUSED BY [Babeltrace CLI] (babeltrace2.c:1720)
>> Cannot find component class: plugin-name="demo",
>> comp-cls-name="MyFirstSource", comp-cls-type=1
>>
>> babeltrace2 --version
>> Babeltrace 2.0.7 "Amqui" [v2.0.6-1-g825a0ed6d]
>>
>> Amqui (/ɒmkwiː/) is a town in eastern Québec, Canada, at the base of
>> the Gaspé peninsula in Bas-Saint-Laurent. Located at the
>> confluence of the Humqui and Matapédia Rivers, its proximity to
>> woodlands makes it a great destination for outdoor activities such as
>> camping, hiking, and mountain biking.
>> yannanwu@ue91e96f2951b5c:~/trees/lttng_test_run$
>>
>> Is the cli changed or something? How can I make it right?
>>
>> Besides, is it possible we create a pipeline in python and make use
>> the the python drafted plugin? Can you advise me how?
>>
>> Amanda
>>
>>
>>
>> _______________________________________________
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