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Core components supporting the Micronaut Framework

There is a newer version: 4.7.9

/*
 * Copyright 2017-2023 original authors
 *
 * Licensed 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
 *
 * https://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 io.micronaut.core.execution;

import io.micronaut.core.annotation.NonNull;
import io.micronaut.core.annotation.Nullable;

/**
 * {@link ExecutionFlow} that can be completed similar to a
 * {@link java.util.concurrent.CompletableFuture}.
 *
 * @param  The type of this flow
 */
public sealed interface DelayedExecutionFlow extends ExecutionFlow permits DelayedExecutionFlowImpl {
    static  DelayedExecutionFlow create() {
        return new DelayedExecutionFlowImpl<>();
    }

    /**
     * Complete this flow normally.
     *
     * @param result The result value
     */
    void complete(@Nullable T result);

    /**
     * Complete this flow with an exception.
     *
     * @param exc The exception
     */
    void completeExceptionally(Throwable exc);

    /**
     * Complete this flow from the given flow.
     *
     * @param flow The input flow
     * @since 4.7.0
     */
    default void completeFrom(@NonNull ExecutionFlow flow) {
        flow.onComplete((o, t) -> {
            if (t != null) {
                completeExceptionally(t);
            } else {
                complete(o);
            }
        });
    }
}