org.apache.james.webadmin.service.EventRetriever Maven / Gradle / Ivy
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package org.apache.james.webadmin.service;
import static org.apache.james.util.ReactorUtils.DEFAULT_CONCURRENCY;
import java.util.Optional;
import org.apache.james.events.Event;
import org.apache.james.events.EventDeadLetters;
import org.apache.james.events.Group;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.util.function.Tuple3;
public interface EventRetriever {
static EventRetriever allEvents() {
return new AllEventsRetriever();
}
static EventRetriever groupEvents(Group group) {
return new GroupEventsRetriever(group);
}
static EventRetriever singleEvent(Group group, EventDeadLetters.InsertionId insertionId) {
return new SingleEventRetriever(group, insertionId);
}
Optional forGroup();
Optional forEvent();
Flux> retrieveEvents(EventDeadLetters deadLetters);
default Flux> listGroupEvents(EventDeadLetters deadLetters, Group group) {
return deadLetters.failedIds(group)
.flatMap(insertionId -> Flux.zip(Mono.just(group), deadLetters.failedEvent(group, insertionId), Mono.just(insertionId)), DEFAULT_CONCURRENCY);
}
class AllEventsRetriever implements EventRetriever {
@Override
public Optional forGroup() {
return Optional.empty();
}
@Override
public Optional forEvent() {
return Optional.empty();
}
@Override
public Flux> retrieveEvents(EventDeadLetters deadLetters) {
return deadLetters.groupsWithFailedEvents()
.flatMap(group -> listGroupEvents(deadLetters, group), DEFAULT_CONCURRENCY);
}
}
class GroupEventsRetriever implements EventRetriever {
private final Group group;
GroupEventsRetriever(Group group) {
this.group = group;
}
@Override
public Optional forGroup() {
return Optional.of(group);
}
@Override
public Optional forEvent() {
return Optional.empty();
}
@Override
public Flux> retrieveEvents(EventDeadLetters deadLetters) {
return listGroupEvents(deadLetters, group);
}
}
class SingleEventRetriever implements EventRetriever {
private final Group group;
private final EventDeadLetters.InsertionId insertionId;
SingleEventRetriever(Group group, EventDeadLetters.InsertionId insertionId) {
this.group = group;
this.insertionId = insertionId;
}
@Override
public Optional forGroup() {
return Optional.of(group);
}
@Override
public Optional forEvent() {
return Optional.of(insertionId);
}
@Override
public Flux> retrieveEvents(EventDeadLetters deadLetters) {
return Flux.zip(Mono.just(group), deadLetters.failedEvent(group, insertionId), Mono.just(insertionId));
}
}
}