As the filters are only passed as a pipe separated list when the
configuration is being processed, there's no need to have the interface
conform to that. Passing a list of filter names makes it more flexible and
will make it's use in the runtime configuration easier.
The Session class now contains all of the C++ objects that were previously
in the MXS_SESSION struct. It is also allocated with new but all
initialization is still done outside of the Session in session_alloc_body.
This commit will not compile as it is a part of a set of commits that make
parts of the session private.
When the configuration was loaded, the dependencies were resolved at the
time the objects were constructed. To remove the need to check whether a
dependency exists at object creation time, the dependencies can be
resolved by the core as a part of the configuration processing.
The circular dependency resolution uses a template function to solve the
problem in a generic fashion. This might be slightly overkill but it is a
good way to test the waters and see whether the functon would be usable in
as a utility function.
Only explicit object dependencies are resolved. If a module declares a
parameter as a string but uses it like an object name, the dependency is
not resolved and can fail.
As the dependency resolution uses Tarjan's algorithm, it has a side-effect
of creating the correct order of objects to meet their dependencies.
Comparing two fixed std::strings would have equal C strings but comparing
with operator== they would be different. This was a result of the string
modification done by fix_object_name.
Converted the internal header into a C++ header, added std::string
overload and fixed use of the function.
There exists a dependency on the configuration for the workers: the total
number of worker thread is defined by the `threads` parameter. This means
that the global configuration section must be read before workers are
started.
Commit 411b70e25656317909e54f748f8012593120041f broke MaxScale and turned
it into a single threaded application as the default configuration value
of one worker was used.
The filter implementation is now fully hidden. Also converted it to a C++
struct allocated with new and stored the filters in a global list instead
of embedding the list in the object itself.
Spaces must be considered a part of the object name in tokenization. This
ensures that the name normalization process generates correct names and
that tokens are split at correct places.
The test cases allocated servers in a way that doesn't comfortably suit
the way the servers are now allocated. Adding a helper C++ class to load
module defaults makes it easier to do explicit server initialization in
tests.
The binlogrouter was also fixed in this commit as it uses servers much
like a test would use.
The configuration system that modules use allows the SSL parameter
validation to be simplified. It should also provide more consistent error
messages for similar types of errors.
The SSL_LISTENER initialization is now done in one step. There was no good
reason to do it in two separate steps for listeners but in one step for
servers.
The `ssl` parameter now also accepts boolean values. As the parameter
behaves like a boolean and looks like a boolean, it ought to be a
boolean. It still accepts the custom `required` and `disabled` values
simply for backwards compatibility.
Also added the missing freeing functions for the SSL_LISTENER type. This
prevents failed SSL_LISTENER creations from leaking memory.
The parameter type and value validation is now fully done for the base
module parameters as well. This fixes a problem that was introduced when
the listeners were moved to the module parameter system where the
`service` parameter values weren't fixed for the new naming style.
Added an explicit check for the module type that catches errors in the
type parameter. The lack of this parameter prevents the proper detection
of other parameters.
Also cleaned up and/or removed redundant sections of code. By treating
reserved parameters the same way as module declared ones, the same code
can be re-used for all types.
The common monitor parameters are now stored as module-style
parameters. This makes the error reporting as well as the type checks for
the parameters consistent with parameters declared by the modules.
The same mechanism that is used for modules can be used for the
configuration of the core objects. This removes the need for the redundant
code that validates various values that is already present in the code
that modules use.
Relaced router_options with configuration parameters in the createInstance
router entry point. The same needs to be done for the filter API as barely
any filters use the feature.
Some routers (binlogrouter) still support router_options but using it is
deprecated. This had to be done as their use wasn't deprecated in 2.2.
The runtime configuration of a MaxScale can now be exported to a single
file. This allows modifications made via runtime configuration commands to
be "committed" for later use.
With the global configuration parameter 'query_classifier_cache'
the query classification cache can be turned on. At the moment it
does not matter what value it has; its presence simply enables the
caching.
Eventually you will be able to specify how much memory the cache
is allowed to consume.
Tracking how many times the monitor has performed its monitoring allows
the test framework to consistently wait for an event instead of waiting
for a hard-coded time period. The MaxCtrl `api get` command can be used to
easily extract the numeric value.
