Package de.quantummaid.eventmaid.qcec.domainBus

Interface DocumentBus

All Known Implementing Classes:

DocumentBusImpl

public interface DocumentBus

The DocumentBus class combines the functionality of the QueryResolver, the ConstraintEnforcer, and the EventBus. All of their methods have been extended with conditions and automatic unsubscribing.

See Also:

EventMaid Documentation

Method Summary

Modifier and Type	Method	Description
<T extends Query<?>> AnswerStep1Builder<T>	answer(Class<T> queryClass)	Entry point of the defining process, how and when to answer a Query.
void	enforce(Object constraint)	Enforces to given constraint.
<T> AnswerStep1Builder<T>	ensure(Class<T> constraintClass)	Entry point of the defining process, how and when to enforce a constraint.
void	publish(Object event)	Publishes the given event.
<T> Optional<T>	query(Query<T> query)	Executes the Query.
<T> T	queryRequired(Query<T> query)	Executes the Query and expects a result.
<T> AnswerStep1Builder<T>	reactTo(Class<T> event)	Entry point of the defining process, how an when to react to an event.
void	unsubscribe(SubscriptionId subscriptionId)	Removes the subscription for the given SubscriptionId independent of whether it was for a Query, a constraint or an event.

Method Detail

answer

<T extends Query<?>> AnswerStep1Builder<T> answer(Class<T> queryClass)

Entry point of the defining process, how and when to answer a Query.

Type Parameters:

T - the type of the Query

Parameters:

queryClass - the class of the Query to answer

Returns:

a builder to define further aspects of the answer

ensure

<T> AnswerStep1Builder<T> ensure(Class<T> constraintClass)

Entry point of the defining process, how and when to enforce a constraint.

Type Parameters:

T - the type of the constraint

Parameters:

constraintClass - the class of the constraint to enforce

Returns:

a builder to define further aspects of the enforcement

reactTo

<T> AnswerStep1Builder<T> reactTo(Class<T> event)

Entry point of the defining process, how an when to react to an event.

Type Parameters:

T - the type of the event

Parameters:

event - the class of the event to react to

Returns:

a builder to define further aspects of the reactin

query

<T> Optional<T> query(Query<T> query)

Executes the Query.

Type Parameters:

T - the type of the Query

Parameters:

query - the Query to execute

Returns:

an Optional containing the result

queryRequired

<T> T queryRequired(Query<T> query)

Executes the Query and expects a result.

Type Parameters:

T - the type of the Query

Parameters:

query - the Query to execute

Returns:

the result of the query

Throws:

UnsupportedOperationException - if no result could be obtained

enforce

void enforce(Object constraint)

Enforces to given constraint.

Parameters:

constraint - the constraint to enforce

publish

void publish(Object event)

Publishes the given event.

Parameters:

event - the event to publish

unsubscribe

void unsubscribe(SubscriptionId subscriptionId)

Removes the subscription for the given SubscriptionId independent of whether it was for a Query, a constraint or an event.

Parameters:

subscriptionId - the SubscriptionId to remove