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 * Copyright (c) 2011-2017 Pivotal Software Inc, 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
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 * 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
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package reactor.core.publisher;

import reactor.core.CoreSubscriber;
import reactor.core.Fuseable;
import reactor.core.publisher.FluxTake.TakeFuseableSubscriber;

Takes only the first N values from the source Publisher.

If N is zero, the subscriber gets completed if the source completes, signals an error or signals its first value (which is not not relayed though).

Type parameters:
  • <T> – the value type
See Also:
/** * Takes only the first N values from the source Publisher. * <p> * If N is zero, the subscriber gets completed if the source completes, signals an error or * signals its first value (which is not not relayed though). * * @param <T> the value type * @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a> */
final class FluxTakeFuseable<T> extends InternalFluxOperator<T, T> implements Fuseable { final long n; FluxTakeFuseable(Flux<? extends T> source, long n) { super(source); if (n < 0) { throw new IllegalArgumentException("n >= 0 required but it was " + n); } this.n = n; } @Override public CoreSubscriber<? super T> subscribeOrReturn(CoreSubscriber<? super T> actual) { return new TakeFuseableSubscriber<>(actual, n); } @Override public Object scanUnsafe(Attr key) { if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC; return super.scanUnsafe(key); } }