org.apache.pulsar.common.util.netty.NettyFutureUtil Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.pulsar.common.util.netty;
import org.apache.pulsar.shade.io.netty.util.concurrent.Future;
import java.util.Objects;
import java.util.concurrent.CompletableFuture;
/**
* Contains utility methods for working with Netty Futures.
*/
public class NettyFutureUtil {
/**
* Converts a Netty {@link Future} to {@link CompletableFuture}.
*
* @param future Netty future
* @param value type
* @return converted future instance
*/
public static CompletableFuture toCompletableFuture(Future future) {
Objects.requireNonNull(future, "future cannot be null");
CompletableFuture adapter = new CompletableFuture<>();
if (future.isDone()) {
if (future.isSuccess()) {
adapter.complete(future.getNow());
} else {
adapter.completeExceptionally(future.cause());
}
} else {
future.addListener((Future f) -> {
if (f.isSuccess()) {
adapter.complete(f.getNow());
} else {
adapter.completeExceptionally(f.cause());
}
});
}
return adapter;
}
/**
* Converts a Netty {@link Future} to {@link CompletableFuture} with Void type.
*
* @param future Netty future
* @return converted future instance
*/
public static CompletableFuture toCompletableFutureVoid(Future future) {
Objects.requireNonNull(future, "future cannot be null");
CompletableFuture adapter = new CompletableFuture<>();
if (future.isDone()) {
if (future.isSuccess()) {
adapter.complete(null);
} else {
adapter.completeExceptionally(future.cause());
}
} else {
future.addListener(f -> {
if (f.isSuccess()) {
adapter.complete(null);
} else {
adapter.completeExceptionally(f.cause());
}
});
}
return adapter;
}
}