Add exception handling for comet updates #1283

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merged 4 commits into from Jul 1, 2012

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Shadowfiend commented Jun 25, 2012

As per https://groups.google.com/forum/#!topic/liftweb/FFoyKp5H7hE .

The idea is to add LiftRules.cometUpdateExceptionHandler, a FactoryMaker[Box[JsCmd]]. If Full, the JsCmd defines the contents of a try/catch block wrapping a set of comet updates. If Empty, the try catch block is omitted entirely.

By default, it should be set to Full(JE.Call("liftComet.lift_cometError", JE.JsVar("e")).cmd) in development mode and Empty otherwise.

Shadowfiend added some commits Jun 25, 2012

@Shadowfiend Shadowfiend Add cometUpdateExceptionHandler LiftRule.
Not implemented yet, but this rule specifies a Box[JsCmd]. If Full, the
contained JsCmd provides the code to put inside the catch of a try/catch
block that is wrapped around comet updates. If Empty, the old behavior
of not wrapping comet updates in try/catch at all is used.
cafb1de
@Shadowfiend Shadowfiend Properly use LiftRules.cometUpdateExceptionHandler.
CometActor now properly wraps its updates in a try/catch block when
cometUpdateExceptionHandler is Full.
777d72d
@Shadowfiend Shadowfiend Default cometUpdateExceptionHandler to Empty in production. 391bfa6
@Shadowfiend Shadowfiend Default implementation of liftComet.lift_cometError.
The default implementation tries to log the exception and then rethrows
it. The log is guarded for the existence of console.error and logged as
an error.
bfdffdd
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fmpwizard commented Jun 26, 2012

Looks great and thanks for the detailed comment on the code.

dpp merged commit bfdffdd into master Jul 1, 2012

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