T - The type of aggregate this repository storespublic class EventSourcingRepository<T> extends LockingRepository<T,EventSourcedAggregate<T>>
EventBus and delegate event
storage to the provided EventStore.EventStore| Modifier and Type | Class and Description |
|---|---|
static class |
EventSourcingRepository.Builder<T>
Builder class to instantiate a
EventSourcingRepository. |
| Modifier | Constructor and Description |
|---|---|
protected |
EventSourcingRepository(EventSourcingRepository.Builder<T> builder)
Instantiate a
EventSourcingRepository based on the fields contained in the EventSourcingRepository.Builder. |
| Modifier and Type | Method and Description |
|---|---|
static <T> EventSourcingRepository.Builder<T> |
builder(Class<T> aggregateType)
Instantiate a Builder to be able to create a
EventSourcingRepository for aggregate type T. |
protected EventSourcedAggregate<T> |
doCreateNewForLock(Callable<T> factoryMethod)
Creates a new aggregate instance using the given
factoryMethod. |
protected void |
doDeleteWithLock(EventSourcedAggregate<T> aggregate)
Perform the actual deleting of the aggregate.
|
protected EventSourcedAggregate<T> |
doLoadWithLock(String aggregateIdentifier,
Long expectedVersion)
Perform the actual loading of an aggregate.
|
protected void |
doSaveWithLock(EventSourcedAggregate<T> aggregate)
Perform the actual saving of the aggregate.
|
AggregateFactory<T> |
getAggregateFactory()
Returns the factory used by this repository.
|
protected DomainEventStream |
readEvents(String aggregateIdentifier)
Reads the events for the given aggregateIdentifier from the eventStore.
|
protected void |
reportIllegalState(LockAwareAggregate<T,EventSourcedAggregate<T>> aggregate)
Invoked when an the given
aggregate instance has been detected that has been part of a rolled back Unit
of Work. |
protected void |
validateOnLoad(Aggregate<T> aggregate,
Long expectedVersion)
Checks the aggregate for concurrent changes.
|
doCreateNew, doDelete, doLoad, doSave, prepareForCommitaggregateModel, canResolve, getAggregateType, load, load, managedAggregates, newInstance, postDelete, postSave, sendprotected EventSourcingRepository(EventSourcingRepository.Builder<T> builder)
EventSourcingRepository based on the fields contained in the EventSourcingRepository.Builder.
A goal of the provided Builder is to create an AggregateModel specifying generic T as the
aggregate type to be stored. All aggregates in this repository must be instanceOf this aggregate type.
To instantiate this AggregateModel, either an AggregateModel can be provided directly or an
aggregateType of type Class can be used. The latter will internally resolve to an
AggregateModel. Thus, either the AggregateModel or the aggregateType should be provided. An
AxonConfigurationException is thrown if this criteria is not met.
The same criteria holds for the AggregateFactory. Either the AggregateFactory can be set directly or it
will be instantiated internally based on the aggregateType. Hence, one of both is a hard requirement, and
will also result in an AxonConfigurationException if both are missing.
Additionally will assert that the LockFactory, EventStore and SnapshotTriggerDefinition
are not null, resulting in an AxonConfigurationException if for any of these this is the case.
builder - the EventSourcingRepository.Builder used to instantiate a EventSourcingRepository instancepublic static <T> EventSourcingRepository.Builder<T> builder(Class<T> aggregateType)
EventSourcingRepository for aggregate type T.
Can also be used to instantiate a CachingEventSourcingRepository for aggregate type T. This
Builder will check whether a Cache is provided. If this holds, the EventSourcingRepository.Builder.build() function
returns a CachingEventSourcingRepository instead of an EventSourcingRepository.
The LockFactory is defaulted to an PessimisticLockFactory and the
SnapshotTriggerDefinition to a NoSnapshotTriggerDefinition implementation.
A goal of this Builder goal is to create an AggregateModel specifying generic T as the aggregate
type to be stored. All aggregates in this repository must be instanceOf this aggregate type. To
instantiate this AggregateModel, either an AggregateModel can be provided directly or an
aggregateType of type Class can be used. The latter will internally resolve to an AggregateModel.
Thus, either the AggregateModel or the aggregateType should be provided.
The same criteria holds for the AggregateFactory. Either the AggregateFactory can be set directly or it
will be instantiated internally based on the aggregateType. Hence, one of both is a hard requirement.
Additionally, the EventStore is a hard requirement and as such should be provided.
EventSourcingRepositoryprotected EventSourcedAggregate<T> doLoadWithLock(String aggregateIdentifier, Long expectedVersion)
doLoadWithLock in class LockingRepository<T,EventSourcedAggregate<T>>aggregateIdentifier - the identifier of the aggregate to loadexpectedVersion - The expected version of the loaded aggregateAggregateDeletedException - in case an aggregate existed in the past, but has been deletedAggregateNotFoundException - when an aggregate with the given identifier does not existprotected DomainEventStream readEvents(String aggregateIdentifier)
aggregateIdentifier - the identifier of the aggregate to loadprotected void validateOnLoad(Aggregate<T> aggregate, Long expectedVersion)
AbstractRepositoryConflictingModificationException when conflicting
changes have been detected.
This implementation throws a ConflictingAggregateVersionException if the expected version is not null
and the version number of the aggregate does not match the expected version
validateOnLoad in class AbstractRepository<T,LockAwareAggregate<T,EventSourcedAggregate<T>>>aggregate - The loaded aggregateexpectedVersion - The expected version of the aggregateprotected void reportIllegalState(LockAwareAggregate<T,EventSourcedAggregate<T>> aggregate)
AbstractRepositoryaggregate instance has been detected that has been part of a rolled back Unit
of Work. This typically means that the state of the Aggregate instance has been compromised and cannot be
guaranteed to be correct.
This implementation throws an exception, effectively causing the unit of work to be rolled back. Subclasses that can guarantee correct storage, even when specific instances are compromised, may override this method to suppress this exception.
When this method is invoked, the AbstractRepository.doSave(Aggregate), AbstractRepository.doDelete(Aggregate),
AbstractRepository.postSave(Aggregate) and AbstractRepository.postDelete(Aggregate) are not invoked. Implementations may choose to
invoke these methods.
reportIllegalState in class AbstractRepository<T,LockAwareAggregate<T,EventSourcedAggregate<T>>>aggregate - The aggregate instance with illegal stateprotected EventSourcedAggregate<T> doCreateNewForLock(Callable<T> factoryMethod) throws Exception
LockingRepositoryfactoryMethod. Implementations should assume that this
method is only called if a UnitOfWork is currently active.doCreateNewForLock in class LockingRepository<T,EventSourcedAggregate<T>>factoryMethod - The method to create the aggregate's root instanceException - when the factoryMethod throws an exceptionprotected void doSaveWithLock(EventSourcedAggregate<T> aggregate)
LockingRepositorydoSaveWithLock in class LockingRepository<T,EventSourcedAggregate<T>>aggregate - the aggregate to storeprotected void doDeleteWithLock(EventSourcedAggregate<T> aggregate)
LockingRepositorydoDeleteWithLock in class LockingRepository<T,EventSourcedAggregate<T>>aggregate - the aggregate to deletepublic AggregateFactory<T> getAggregateFactory()
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