Repository: micronaut-projects/micronaut-core
File: core/src/main/java/io/micronaut/core/execution/DelayedExecutionFlow.java (Java)

Code before:
 * 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;

import java.util.concurrent.CompletionException;
import java.util.function.BiConsumer;

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

    /**
     * Check for cancellation.
     *
     * @return {@code true} iff this flow or any downstream flow has been cancelled
     * @since 4.8.0
     */
    boolean isCancelled();

Review comment (suggestion):
i dont like making this part of the API. how about a method `BiConsumer completer() { return this }` instead

Code after:
 * 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;

import java.util.concurrent.CompletionException;

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

    /**
     * Check for cancellation.
     *
     * @return {@code true} iff this flow or any downstream flow has been cancelled
     * @since 4.8.0
     */
    boolean isCancelled();