jonyfs / eventstore

EventStore interface Example

EventStore Example

In this example, I created a class that implements the EventStore interface.

public interface EventStore {
    void insert(Event event); 

    void removeAll(String type);

    EventIterator query(String type, LocalDateTime startTime, LocalDateTime endTime);
}

Events may be stored in memory, data files, a database, on a remote server, etc. For this example, was implemented an in-memory event event store.

The events in memory was stored in a Syncronized List as below:

public class EventStoreImpl implements EventStore {

    // Creating a thread-safe Event List
    @Getter
    final List<Event> events = Collections.synchronizedList(new ArrayList());
...
}

Collections.synchronizedList() method Returns a synchronized (thread-safe) list backed by the specified list. In order to guarantee serial access, it is critical that all access to the backing list is accomplished through the returned list.

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