MariaDBMonitor diagnostics printing is unsafe as some of the read
fields are arrays. To be on the safe side, the fields are now read
in the monitor worker thread.
Since diagnostics must work even for stopped monitors, a worker task
is used. In practice, it usually runs when the monitor is sleeping.
The mxs::strtok function splits a string into a vector of strings based on
a set of delimiters. The function makes it easier to iterate over a set of
values given as a delimited string.
If the starting of a transaction was interrupted by a server failure, the
query needs to be retried. This needs to be done as a transaction replay
to keep the routing logic consistent and simple.
When a non-autocommit transaction is interrupted, there will be no query
in progress and no replaying is needed. To handle this case, the replay
initialization logic needed to be altered to treat truly empty
transactions as a success case.
The Checksum class defines an interface which the SHA1Checksum and
CRC32Checksum implement.
Added test unit test cases to verify that the checksums work and perform
as expected.
The templated provides an unary predicate for (shared) pointers that
allows containers containing pointers to objects to be searched, not by
pointer comparisons but by comparisons of the values that they point
to. This allows std::find_if to be used with shared pointers in a similar
manner that std::find is used with non-pointer objects.
The template class wraps a HashMap such that only a few operations
are allowed. Usage requires specializing a RegistryTraits class
template for each entry type.
Closer is a template using which C-style resources can be managed
in a C++ context where exceptions can occur. By placing a C resource
in a Closer instance, it is certain the resource will be freed when
the closing scope is exited irrespective of whether that occurs due
to the normal control flow, due to a return statement or an exception
having been thrown.
To be used with Closer, the CloserTraits template must be specialized
for the type in question. With this change specializations are provided
for FILE*, json_t*, pcre_code* and pcre2_match_data*.
