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exceptionallyCompose (Future method)
Last update:
May 18, 2026
If this Future fails, runs a recovery function on the completing thread that returns another Future.
Description
Synchronous counterpart to exceptionallyComposeAsync.
Returns
A new Future.
Category
Asynchronous programming
Function syntax
future.exceptionallyCompose(function)Parameters
| Parameter | Description |
|---|---|
| function | Required. A function that takes the exception and returns a Future. |
See also
Example
Same recovery shape as the async variant; callback runs on the completing thread.
<cfscript>
future = runAsync(function() { throw("error"); });
sleep(200);
recovered = future.exceptionallyCompose(function(error) { return runAsync(function() { return "recovered_async"; });});
writeOutput(recovered.get()); // recovered_async
</cfscript>
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