server/task/task-distributed/src/main/java/org/apache/james/task/eventsourcing/distributed/TasksSerializationModule.java

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package org.apache.james.task.eventsourcing.distributed;

import java.util.Set;
import java.util.stream.Stream;

import org.apache.james.eventsourcing.Event;
import org.apache.james.eventsourcing.eventstore.dto.EventDTO;
import org.apache.james.eventsourcing.eventstore.dto.EventDTOModule;
import org.apache.james.json.DTOConverter;
import org.apache.james.server.task.json.JsonTaskSerializer;
import org.apache.james.server.task.json.dto.AdditionalInformationDTO;
import org.apache.james.server.task.json.dto.TaskDTO;
import org.apache.james.task.Task;
import org.apache.james.task.TaskExecutionDetails;
import org.apache.james.task.eventsourcing.AdditionalInformationUpdated;
import org.apache.james.task.eventsourcing.CancelRequested;
import org.apache.james.task.eventsourcing.Cancelled;
import org.apache.james.task.eventsourcing.Completed;
import org.apache.james.task.eventsourcing.Created;
import org.apache.james.task.eventsourcing.Failed;
import org.apache.james.task.eventsourcing.Started;

import com.google.common.collect.ImmutableSet;

public interface TasksSerializationModule {
    @FunctionalInterface
    interface TaskSerializationModuleFactory {
        EventDTOModule<? extends Event, ? extends EventDTO> create(JsonTaskSerializer taskSerializer,
                                    DTOConverter<TaskExecutionDetails.AdditionalInformation, AdditionalInformationDTO> additionalInformationConverter,
                                    DTOConverter<Task, TaskDTO> dtoConverter);
    }

    TaskSerializationModuleFactory CREATED = (jsonTaskSerializer, additionalInformationConverter, dtoConverter) -> EventDTOModule
        .forEvent(Created.class)
        .convertToDTO(CreatedDTO.class)
        .toDomainObjectConverter(dto -> dto.toDomainObject(dtoConverter))
        .toDTOConverter((event, typeName) -> CreatedDTO.fromDomainObject(dtoConverter, event, typeName))
        .typeName("task-manager-created")
        .withFactory(EventDTOModule::new);

    TaskSerializationModuleFactory STARTED = (jsonTaskSerializer, additionalInformationConverter, dtoConverter) -> EventDTOModule
        .forEvent(Started.class)
        .convertToDTO(StartedDTO.class)
        .toDomainObjectConverter(StartedDTO::toDomainObject)
        .toDTOConverter(StartedDTO::fromDomainObject)
        .typeName("task-manager-started")
        .withFactory(EventDTOModule::new);

    TaskSerializationModuleFactory CANCEL_REQUESTED = (jsonTaskSerializer, additionalInformationConverter, dtoConverter) -> EventDTOModule
        .forEvent(CancelRequested.class)
        .convertToDTO(CancelRequestedDTO.class)
        .toDomainObjectConverter(CancelRequestedDTO::toDomainObject)
        .toDTOConverter(CancelRequestedDTO::fromDomainObject)
        .typeName("task-manager-cancel-requested")
        .withFactory(EventDTOModule::new);

    TaskSerializationModuleFactory COMPLETED = (jsonTaskSerializer, additionalInformationConverter, dtoConverter) -> EventDTOModule
        .forEvent(Completed.class)
        .convertToDTO(CompletedDTO.class)
        .toDomainObjectConverter(dto -> dto.toDomainObject(additionalInformationConverter))
        .toDTOConverter((event, typeName) -> CompletedDTO.fromDomainObject(additionalInformationConverter, event, typeName))
        .typeName("task-manager-completed")
        .withFactory(EventDTOModule::new);

    TaskSerializationModuleFactory FAILED = (jsonTaskSerializer, additionalInformationConverter, dtoConverter) -> EventDTOModule
        .forEvent(Failed.class)
        .convertToDTO(FailedDTO.class)
        .toDomainObjectConverter(dto -> dto.toDomainObject(additionalInformationConverter))
        .toDTOConverter((event, typeName) -> FailedDTO.fromDomainObject(additionalInformationConverter, event, typeName))
        .typeName("task-manager-failed")
        .withFactory(EventDTOModule::new);

    TaskSerializationModuleFactory CANCELLED = (jsonTaskSerializer, additionalInformationConverter, dtoConverter) -> EventDTOModule
        .forEvent(Cancelled.class)
        .convertToDTO(CancelledDTO.class)
        .toDomainObjectConverter(dto -> dto.toDomainObject(additionalInformationConverter))
        .toDTOConverter((event, typeName) -> CancelledDTO.fromDomainObject(additionalInformationConverter, event, typeName))
        .typeName("task-manager-cancelled")
        .withFactory(EventDTOModule::new);

    TaskSerializationModuleFactory UPDATED = (jsonTaskSerializer, additionalInformationConverter, dtoConverter) -> EventDTOModule
        .forEvent(AdditionalInformationUpdated.class)
        .convertToDTO(AdditionalInformationUpdatedDTO.class)
        .toDomainObjectConverter(dto -> dto.toDomainObject(additionalInformationConverter))
        .toDTOConverter((event, typeName) -> AdditionalInformationUpdatedDTO.fromDomainObject(additionalInformationConverter, event, typeName))
        .typeName("task-manager-updated")
        .withFactory(EventDTOModule::new);

    static Set<EventDTOModule<? extends Event, ? extends EventDTO>> list(JsonTaskSerializer jsonTaskSerializer,
                                                                         DTOConverter<TaskExecutionDetails.AdditionalInformation, AdditionalInformationDTO> additionalInformationConverter,
                                                                         DTOConverter<Task, TaskDTO> dtoConverter) {
        return Stream
            .of(CREATED, STARTED, CANCEL_REQUESTED, CANCELLED, COMPLETED, FAILED, UPDATED)
            .map(moduleFactory -> moduleFactory.create(jsonTaskSerializer, additionalInformationConverter, dtoConverter))
            .collect(ImmutableSet.toImmutableSet());
    }
}