Interface ManagedPartitionDefinition<T>

Type Parameters:

T - stateless activation-owned reducer

All Superinterfaces:

ManagedComponentDefinition<T>, ManagedHostAdapter<T>, ManagedHostedAdapter<T>

public interface ManagedPartitionDefinition<T>
extends ManagedHostedAdapter<T>

Generated direct-access plan for a deterministic config-only POJO partition reducer. State is owned by the encoded resource, not by mutable fields of the component. Reducer code must be deterministic, bounded and free of external effects; this contract is not a Java sandbox. The host validates concrete A01 data types and exact program compatibility before registration.

Method Summary

Modifier and Type	Method	Description
Object	apply(T instance, Object state, Object command)	Computes replacement state from independently decoded state and command values.
Class<?>	commandType()	Returns the explicitly registered command type.
Object	initial(T instance)	Creates initial state without external effects.
ManagedHostedFeature	partition()	Returns the exact hosted partition descriptor.
Object	query(T instance, Object state, Object query)	Computes a view from independently decoded state without changing live resource state.
Class<?>	queryType()	Returns the explicitly registered query type.
Class<?>	stateType()	Returns the explicitly registered state type.
Class<?>	viewType()	Returns the explicitly registered view type.

Methods inherited from interface ManagedComponentDefinition

create, dependencies, inject, name, owned, qualifiers, scope, type

Methods inherited from interface ManagedHostAdapter

invoke, lifecycle, probe, probes, remoteMethods

Methods inherited from interface ManagedHostedAdapter

hostedFeatures, invokeHosted

Method Details

partition

ManagedHostedFeature partition()

Returns the exact hosted partition descriptor.

Returns:

one feature of kind partition

stateType

Class<?> stateType()

Returns the explicitly registered state type.

Returns:

concrete record or supported scalar/bytes type

commandType

Class<?> commandType()

Returns the explicitly registered command type.

Returns:

concrete data type

queryType

Class<?> queryType()

Returns the explicitly registered query type.

Returns:

concrete data type

viewType

Class<?> viewType()

Returns the explicitly registered view type.

Returns:

concrete data type

initial

Object initial(T instance)
        throws Exception

Creates initial state without external effects.

Parameters:

instance - stateless reducer

Returns:

nonnull state of stateType()

Throws:

Exception - if initialization fails

apply

Object apply(T instance,
 Object state,
 Object command)
      throws Exception

Computes replacement state from independently decoded state and command values.

Parameters:

instance - stateless reducer

state - independent current state

command - independent command

Returns:

nonnull replacement state of stateType()

Throws:

Exception - for a rejected business command

query

Object query(T instance,
 Object state,
 Object query)
      throws Exception

Computes a view from independently decoded state without changing live resource state.

Parameters:

instance - stateless reducer

state - independent current state

query - independent query

Returns:

view of viewType()

Throws:

Exception - if the query is rejected