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• 0.1.3
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• CacheUtils.java

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com.playtika.shepherd.inernal.utils.CacheUtils Maven / Gradle / Ivy

package com.playtika.shepherd.inernal.utils;

import java.util.Objects;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Supplier;

public class CacheUtils {

    public static  Supplier memoize(Supplier delegate) {
        AtomicReference value = new AtomicReference<>();
        return () -> {
            T val = value.get();
            if (val == null) {
                val = value.updateAndGet(cur -> cur == null ?
                        Objects.requireNonNull(delegate.get()) : cur);
            }
            return val;
        };
    }
}