io.lettuce.core.resource.PromiseAdapter Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of lettuce-core Show documentation

Advanced and thread-safe Java Redis client for synchronous, asynchronous, and reactive usage. Supports Cluster, Sentinel, Pipelining, Auto-Reconnect, Codecs and much more.

The newest version!

package io.lettuce.core.resource;

import io.netty.util.concurrent.*;

/**
 * Utility class to support netty's future handling.
 *
 * @author Mark Paluch
 * @since 3.4
 */
class PromiseAdapter {

    /**
     * Create a promise that emits a {@code Boolean} value on completion of the {@code future}
     *
     * @param future the future.
     * @return Promise emitting a {@code Boolean} value. {@code true} if the {@code future} completed successfully, otherwise
     *         the cause wil be transported.
     */
    static Promise toBooleanPromise(Future future) {

        DefaultPromise result = new DefaultPromise<>(GlobalEventExecutor.INSTANCE);

        if (future.isDone() || future.isCancelled()) {
            if (future.isSuccess()) {
                result.setSuccess(true);
            } else {
                result.setFailure(future.cause());
            }
            return result;
        }

        future.addListener((GenericFutureListener>) f -> {

            if (f.isSuccess()) {
                result.setSuccess(true);
            } else {
                result.setFailure(f.cause());
            }
        });
        return result;
    }

}