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Merge pull request #57 from hhu-propra2/GroupLogicProjection

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Group logic projection
This commit is contained in:
Talha Caliskan
2020-03-11 14:04:23 +01:00
committed by GitHub
parent 66624269dd 0e979c1f04
commit aaa3437eed
6 changed files with 69 additions and 66 deletions
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4
src/main/java/mops/gruppen2/domain/Group.java
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@ -77,8 +77,4 @@ public class Group extends Aggregate {
throw new UserNotFoundException("Nutzer wurde nicht gefunden!");
}
}
private void applyEvent(DeleteGroupEvent event) {
this.id = this.id * -1;
}
}

17
src/main/java/mops/gruppen2/service/EventService.java
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@ -6,6 +6,9 @@ import mops.gruppen2.domain.event.Event;
import mops.gruppen2.repository.EventRepository;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.List;
@Service
public class EventService {
private final SerializationService serializationService;
@ -48,4 +51,18 @@ public class EventService {
}
return tmpId;
}
public List<Event> findAllEvents() {
Iterable<EventDTO> eventDTOS = eventStore.findAll();
List<Event> events = new ArrayList<>();
eventDTOS.forEach(eventDTO -> {
try {
events.add(serializationService.deserializeEvent(eventDTO.getEvent_payload()));
} catch (JsonProcessingException e) {
e.printStackTrace();
}
});
return events;
}
}

63
src/main/java/mops/gruppen2/service/GroupService.java
View File

@ -1,49 +1,58 @@
package mops.gruppen2.service;
import lombok.EqualsAndHashCode;
import mops.gruppen2.domain.Exceptions.EventException;
import mops.gruppen2.domain.Exceptions.GroupDoesNotExistException;
import mops.gruppen2.domain.Group;
import mops.gruppen2.domain.event.CreateGroupEvent;
import mops.gruppen2.domain.event.DeleteGroupEvent;
import mops.gruppen2.domain.event.Event;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@Service
public class GroupService {
/**
* Konstruiert eine vollständige Gruppe aus Events, welche dieselbe Gruppe betreffen.
*
* @param eventList Die restlichen Events für diese Gruppe
* @return Gruppe auf aktuellem Stand
*/
Group buildGroupFromEvents(List<Event> eventList) throws EventException {
Group newGroup = new Group();
private final EventService eventService;
try {
if (!(eventList.get(0) instanceof CreateGroupEvent)) {
throw new GroupDoesNotExistException("Die Gruppe existiert nicht");
public GroupService(EventService eventService) {
this.eventService = eventService;
}
public List<Group> projectEventList(Map<Long, Group> groupMap, List<Event> events) throws EventException {
for (Event event : events) {
if (event instanceof CreateGroupEvent) {
groupMap.put(event.getGroup_id(), new Group());
}
if (event instanceof DeleteGroupEvent) {
groupMap.remove(event.getGroup_id());
} else {
newGroup.applyEvent(eventList.get(0));
eventList.remove(0);
}
for (Event event : eventList) {
if (!(newGroup.getId() > 0)) {
throw new GroupDoesNotExistException("Die Gruppe existiert nicht");
try {
Group group = groupMap.get(event.getGroup_id());
if (group == null) {
throw new GroupDoesNotExistException("Gruppe " + event.getGroup_id() + " existiert nicht");
}
group.applyEvent(event);
} catch (EventException e) {
if (e instanceof GroupDoesNotExistException) {
throw e;
}
e.printStackTrace();
}
newGroup.applyEvent(event);
}
} catch (EventException e) {
if (e instanceof GroupDoesNotExistException) {
throw e;
}
e.printStackTrace();
}
if (newGroup.getId() < 0) {
return null;
}
return newGroup;
return new ArrayList<>(groupMap.values());
}
public List<Group> projectEventList(List<Event> events) throws EventException {
return projectEventList(new HashMap<>(), events);
}
}