shz.cache.LocalCache Maven / Gradle / Ivy

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package shz.cache;

import java.lang.ref.Reference;
import java.lang.ref.ReferenceQueue;
import java.lang.ref.SoftReference;
import java.lang.ref.WeakReference;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

public abstract class LocalCache implements Cache {
    private final RefType refType;
    protected ReferenceQueue queue;

    protected LocalCache(RefType refType, ReferenceQueue queue) {
        this.refType = refType;
        this.queue = queue;
    }

    protected final Reference getReference(V val) {
        return refType == RefType.WEAK ? new WeakReference<>(val, queue) : new SoftReference<>(val, queue);
    }

    public static final ConcurrentMap> CACHE = new ConcurrentHashMap<>();
}