Package io.axoniq.framework.messaging.multitenancy.annotation

Class TenantComponentParameterResolverFactory

java.lang.Object

io.axoniq.framework.messaging.multitenancy.annotation.TenantComponentParameterResolverFactory

All Implemented Interfaces:

ParameterResolverFactory

@Internal
public class TenantComponentParameterResolverFactory
extends Object
implements ParameterResolverFactory

ParameterResolverFactory injecting tenant-scoped components into message-handling methods.

For each handler parameter it looks for a registered TenantComponentProvider whose component type fits the parameter type. When one is found, the resolved parameter value is that provider's instance for the tenant of the message being handled. The tenant is derived from the current ProcessingContext (see RegisterTenantDescriptorHandlerInterceptor).

Registering several providers (one per component type) is supported: each parameter is matched to the provider for its own type. A single exact type match settles the choice, even when assignable supertype candidates exist. When the choice cannot be settled by an exact match, handler inspection fails with an AxonConfigurationException, since silently picking one of the candidates could hand the handler the wrong tenant-scoped resource.

Since:

5.3.0

Author:

Theo Emanuelsson, Jan Galinski, Laura Devriendt, Jakob Hatzl

See Also:

• TenantComponentProvider

Constructor Summary

Constructors

Constructor	Description
TenantComponentParameterResolverFactory(Configuration configuration)	Constructs a TenantComponentParameterResolverFactory for the given configuration.

Method Summary

Modifier and Type	Method	Description
@Nullable ParameterResolver<?>	createInstance(Executable executable, Parameter[] parameters, int parameterIndex)	If available, creates a ParameterResolver instance that can provide a parameter of type parameterType for a given message.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

TenantComponentParameterResolverFactory

public TenantComponentParameterResolverFactory(Configuration configuration)

Constructs a TenantComponentParameterResolverFactory for the given configuration.

The given configuration supplies the registered providers matched against handler parameters. The tenant itself is read from the ProcessingContext of the message being handled.

Parameters:

configuration - the configuration to look up the registered tenant-component providers, must not be null

Method Details

createInstance

public @Nullable ParameterResolver<?> createInstance(Executable executable,
 Parameter[] parameters,
 int parameterIndex)

Description copied from interface: ParameterResolverFactory

If available, creates a ParameterResolver instance that can provide a parameter of type parameterType for a given message.

If the ParameterResolverFactory cannot provide a suitable ParameterResolver, returns null.

Specified by:

createInstance in interface ParameterResolverFactory

Parameters:

executable - The executable (constructor or method) to inspect.

parameters - The parameters on the executable to inspect.

parameterIndex - The index of the parameter to return a ParameterResolver for.

Returns:

A suitable ParameterResolver, or null if none is found.