/** * Copyright (c) 2016-present, RxJava Contributors. * * 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 * * http://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.reactivex; /** * Represents the options for applying backpressure to a source sequence. */ public enum BackpressureStrategy { /** * OnNext events are written without any buffering or dropping. * Downstream has to deal with any overflow. * <p>Useful when one applies one of the custom-parameter onBackpressureXXX operators. */ MISSING, /** * Signals a MissingBackpressureException in case the downstream can't keep up. */ ERROR, /** * Buffers <em>all</em> onNext values until the downstream consumes it. */ BUFFER, /** * Drops the most recent onNext value if the downstream can't keep up. */ DROP, /** * Keeps only the latest onNext value, overwriting any previous value if the * downstream can't keep up. */ LATEST }