postgresql-simple
safe-exceptions
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postgresql-simple | safe-exceptions | |
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1 | 3 | |
206 | 132 | |
- | 0.0% | |
0.0 | 3.4 | |
over 2 years ago | 6 months ago | |
Haskell | Haskell | |
BSD 3-clause "New" or "Revised" License | MIT License |
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postgresql-simple
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Async Control Flow
Hmm, you are right, the bracket I pointed to is unrelated. I guess the fix is in catchAny, which doesn't catch ThreadKilled. So not it's not rolling the transaction back in case of asynchronous exceptions. My point is that it probably should not rollback even on synchronous exception. BTW the issue is well know, see for example here
safe-exceptions
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Spooky Masks and Async Exceptions
In case anyone is interested, there's a long discussion on this ticket. Still hoping somebody will respond to my comment.
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Async Control Flow
In safe-exception and uniftio it was decided to rethrow the original exception exactly because they decided to use uninterruptibleMask, see here for details.
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Why exactly I want Boring Haskell to happen
unliftio (and safe-exceptions) contains a very controversial choice of of using uninterruptibleMask inside its bracket. The argument for it seem to come from this issue and comes from the fact that one of the most popular resource finalizers hClose is interruptible. This is a simplification. It is interruptible only if a file handle is used concurrently. Such usage of file handles is rather odd, and it suggest wrong architecture, for example leaking file handles using concurrency. When using file handles in synchronous setting, what withFile pattern encourages, hClose will not block and thus mask is enough.
What are some alternatives?
haskey-btree - B+-tree implementation in Haskell
unexceptionalio - IO without any PseudoExceptions
mbtiles - Haskell MBTiles Library
ifcxt - constraint level if statements
postgresql-schema - PostgreSQL Schema is a database migration tool.
atl - Arrow Transformer Library
gremlin-haskell - Haskell graph database client for TinkerPop3 Gremlin Server
effect-monad - Provides 'graded monads' and 'parameterised monads' to Haskell, enabling fine-grained reasoning about effects.
hocilib - A lightweight Haskell binding to the OCILIB C API
transient - A full stack, reactive architecture for general purpose programming. Algebraic and monadically composable primitives for concurrency, parallelism, event handling, transactions, multithreading, Web, and distributed computing with complete de-inversion of control (No callbacks, no blocking, pure state)
postgresql-transactional - Transactional monadic actions on top of PostgreSQL.
time-warp