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size restrict the eventMap

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Armin Schrenk
2025-03-12 10:00:56 +01:00
parent 598fc9bbc8
commit 14a025f769
1 changed files with 12 additions and 0 deletions
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12
src/main/java/org/cryptomator/common/EventMap.java
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@@ -18,16 +18,23 @@ import javafx.collections.MapChangeListener;
import javafx.collections.ObservableMap;
import java.nio.file.Path;
import java.util.Collection;
import java.util.Comparator;
import java.util.Map;
import java.util.Set;
/**
* Map containing {@link VaultEvent}s.
* The map is keyed by the ciphertext path of the affected resource _and_ the {@link FilesystemEvent}s class in order to group same events
* <p>
* Use {@link EventMap#put(VaultEvent)} to add an element and {@link EventMap#remove(VaultEvent)} to remove it.
* <p>
* The map is size restricted to {@value MAX_SIZE} elements. If a _new_ element (i.e. not already present) is added, the least recently added is removed.
*/
@Singleton
public class EventMap implements ObservableMap<EventMap.EventKey, VaultEvent> {
private static final int MAX_SIZE = 300;
public record EventKey(Path ciphertextPath, Class<? extends FilesystemEvent> c) {}
private final ObservableMap<EventMap.EventKey, VaultEvent> delegate;
@@ -123,6 +130,11 @@ public class EventMap implements ObservableMap<EventMap.EventKey, VaultEvent> {
//if-else
var nullOrEntry = delegate.get(key);
if (nullOrEntry == null) {
if (size() == MAX_SIZE) {
delegate.entrySet().stream() //
.min(Comparator.comparing(entry -> entry.getValue().timestamp())) //
.ifPresent(oldestEntry -> delegate.remove(oldestEntry.getKey()));
}
delegate.put(key, e);
} else {
delegate.put(key, nullOrEntry.incrementCount(e.timestamp()));