Synnefo » snf-ganeti

User new error handling functions in SubmitJobToDrainedQueue

This somewhat shortens and simplifies the code.

Signed-off-by: Petr Pudlak <pudlak@google.com>
Reviewed-by: Klaus Aehlig <aehlig@google.com>

Use new error handling functions for querying jobs

Since we already touched getJobIDs, and this function is already based
on ResultT, use new error functions here as well.

Signed-off-by: Petr Pudlak <pudlak@google.com>
Reviewed-by: Klaus Aehlig <aehlig@google.com>

Improve liftIO of ResultT to catch IOErrors

Any IOErrors are now captured in ResultT's liftIO using try and converted into
'Bad'. This prevents IO exceptions from leaking into ResultT code and allows
them to be handled in a pure way inside ResultT's sum type....

Generalize type signatures of functions that produce Result

This allows them to be used in any 'MonadError', in particular in monad stacks
composed using ResultT, without explicit lifting.

Signed-off-by: Petr Pudlak <pudlak@google.com>
Reviewed-by: Klaus Aehlig <aehlig@google.com>

Add functions for manipulating errors in Result(T)

There is often need to manipulate these errors, for example to convert a String
from Result into an exception. These functions make this easier.

Function 'toErrorStr' lifts 'Result' to any 'MonadError'. This is useful...