Adriano Machado created CAMEL-24397:
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Summary: camel-tui: --record produces no cast file because the
recording backend is never applied
Key: CAMEL-24397
URL: https://issues.apache.org/jira/browse/CAMEL-24397
Project: Camel
Issue Type: Bug
Reporter: Adriano Machado
h3. Problem
{{camel tui \-\-record=}} exits cleanly but neither replays the tape nor writes
the {{.cast}} file. Nothing is logged, so the failure is indistinguishable from
success.
h3. Root cause
{{CamelMonitor}} sets the {{tamboui.record\*}} system properties correctly, but
nothing ever reads them.
TamboUI applies recording in exactly one place, {{BackendFactory.create\(\)}},
which calls {{RecordingConfig.load\(\)}} \(installing the System.out capture
and the shutdown hook that writes the cast\) and wraps the backend in
{{RecordingBackend}} \(which loads the tape via {{InteractionPlayer}}\).
{{TuiRunner.create\(\)}} only calls that factory when no explicit backend is
configured:
{code:java}
Backend backend = config.backend\(\) \!= null ? config.backend\(\) :
BackendFactory.create\(\);
{code}
{{TuiBackendHelper}} always supplies an explicit {{JLineBackend}}, so
{{BackendFactory.create\(\)}} never runs and recording is never engaged.
h3. Regression* 3c3f2687d9e8 \(2026\-05\-20\) added {{\-\-record}} and used a
bare {{TuiRunner.create\(\)}}, so recording worked.
* 36f9299d1322 \(2026\-05\-26\) introduced the explicit backend and silently
broke it.
The explicit backend is deliberate and must stay: with tamboui\-aesh\-backend
on the classpath for {{\-\-web}}, ServiceLoader auto\-discovery can select
AeshBackend for the local session, which does not shut down cleanly. The fix
therefore applies the recording wrapper explicitly rather than reverting to
auto\-discovery.
h3. Also in this change
The recording geometry was hardcoded at 200x50 \(plus fps 10 and duration
120000\). 200 columns is too wide to embed in a documentation page, so
{{\-\-record\-size}}, {{\-\-record\-fps}} and {{\-\-record\-duration}} are
added. Defaults are unchanged.
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