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/*
 * Copyright (c) 2020-2030, Shuigedeng ([email protected] & https://blog.taotaocloud.top/).
 *
 * 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 com.taotao.boot.rxjava.async;

import io.reactivex.rxjava3.core.Observable;
import io.reactivex.rxjava3.observers.DisposableObserver;
import org.springframework.web.context.request.async.DeferredResult;

/**
 * A subscriber that sets the single value produced by the {@link Observable} on the
 * {@link DeferredResult}.
 *
 * @author shuigedeng
 * @version 2021.9
 * @since 2021-09-07 20:48:31
 */
class DeferredResultObserver extends DisposableObserver implements Runnable {

	private final DeferredResult deferredResult;

	public DeferredResultObserver(Observable observable, DeferredResult deferredResult) {
		this.deferredResult = deferredResult;
		this.deferredResult.onTimeout(this);
		this.deferredResult.onCompletion(this);
		observable.subscribe(this);
	}

	@Override
	public void onNext(T value) {
		deferredResult.setResult(value);
	}

	@Override
	public void onError(Throwable e) {
		deferredResult.setErrorResult(e);
	}

	@Override
	public void onComplete() {
	}

	@Override
	public void run() {
		this.dispose();
	}
}