/*
 * Copyright (c) 2011-Present VMware Inc. or its affiliates, All Rights Reserved.
 *
 * 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 reactor.core.publisher;

import java.util.Objects;

import reactor.core.CoreSubscriber;
import reactor.util.retry.Retry;

retries a source when a companion sequence signals an item in response to the main's
error signal

If the companion sequence signals when the main source is active, the repeat attempt
is suppressed and any terminal signal will terminate the main source with the same
signal immediately.
Type parameters:
<T> – the source value type
See Also:
Reactive-Streams-Commons/**
 * retries a source when a companion sequence signals an item in response to the main's
 * error signal
 * <p>
 * <p>If the companion sequence signals when the main source is active, the repeat attempt
 * is suppressed and any terminal signal will terminate the main source with the same
 * signal immediately.
 *
 * @param <T> the source value type
 * @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a>
 */
final class MonoRetryWhen<T> extends InternalMonoOperator<T, T> {

	final Retry whenSourceFactory;

	MonoRetryWhen(Mono<? extends T> source, Retry whenSourceFactory) {
		super(source);
		this.whenSourceFactory = Objects.requireNonNull(whenSourceFactory, "whenSourceFactory");
	}

	@Override
	public CoreSubscriber<? super T> subscribeOrReturn(CoreSubscriber<? super T> actual) {
		FluxRetryWhen.subscribe(actual, whenSourceFactory, source);
		return null;
	}

	@Override
	public Object scanUnsafe(Attr key) {
		if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC;
		return super.scanUnsafe(key);
	}
}