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https://issues.apache.org/jira/browse/CAMEL-25865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18129003#comment-18129003
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Claus Ibsen commented on CAMEL-25865:
-------------------------------------
Added to PR #28144: load() keeps reading the classpath only (CAMEL-22955) and
still drops a prefix, but when a name with a prefix is not on the classpath,
the error now says so. For ${load(file:/var/inbox/data.json)}:
{noformat}
Cannot find resource: ... in classpath for URI: /var/inbox/data.json. The load
function loads from the classpath only, so the file: prefix is not used; to
read a file of the file-system, use the constant language with
resource:file:/var/inbox/data.json
{noformat}
A name that is on the classpath still loads, with or without the prefix.
_Claude Code on behalf of davsclaus_
> camel-jbang - the tools and the Simple docs say how to read a data file:
> constant with resource:file:, and load() under camel run
> ---------------------------------------------------------------------------------------------------------------------------------
>
> Key: CAMEL-25865
> URL: https://issues.apache.org/jira/browse/CAMEL-25865
> Project: Camel
> Issue Type: Improvement
> Components: camel-core, camel-jbang
> Reporter: Claus Ibsen
> Assignee: Claus Ibsen
> Priority: Major
> Fix For: 4.24.0
>
>
> A route that needs a data file, such as a lookup table (stock.json), reads it
> with the constant language: {{resource:file:stock.json}}, for example in a
> {{setVariable}}. That recipe is only on the page of the constant language.
> The tools point elsewhere:
> * {{camel_catalog_doc file}} says "to consume one message in the middle of a
> route use the poll EIP (poll: {uri: ...}), or pollEnrich";
> * a consumer option on a {{to: file:...}} (such as fileName with noop) gets
> "to read from an endpoint in the middle of a route use the poll EIP, or
> pollEnrich".
> The poll EIP consumes the file (it is moved away without noop), which is not
> what a lookup needs.
> The Simple docs say that {{load()}} "can only load from classpath; and not
> the file-system". That is so, but with Camel JBang, {{camel run}} puts the
> files of the project on the classpath ("Additional files added to classpath:
> ..."), so {{${load(stock.json)}}} reads a stock.json next to the routes. The
> docs do not say it.
> Found in a benchmark of Oct 19-20 2026: in a JMS example, 7 of 12 runs tried
> to load stock.json and failed; no run opened the constant page.
> Proposal:
> * For the file component, both hints add: to read a data file the route
> needs, such as a lookup table, use the constant language with resource:file:
> (such as setVariable with constant: resource:file:stock.json). Other
> components keep their hint.
> * The Simple docs say that camel run puts the files of the project on the
> classpath, and point to resource:file: of the constant language to read a
> file of the file system in any runtime.
> _Claude Code on behalf of davsclaus_
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