RxJava2 Flowable buffer（转换操作符）

buffer

目录

buffer接口文档

buffer测试用例

buffer测试用例分析

buffer实用场景

---

 

buffer接口文档

<B> Flowable<List<T>>	buffer(Callable<? extends Publisher<B>> boundaryIndicatorSupplier) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
<B,U extends Collection<? super T>> Flowable<U>	buffer(Callable<? extends Publisher<B>> boundaryIndicatorSupplier,Callable<U> bufferSupplier) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
<TOpening,TClosing> Flowable<List<T>>	buffer(Flowable<? extends TOpening> openingIndicator, Function<? super TOpening,? extendsPublisher<? extends TClosing>> closingIndicator) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
<TOpening,TClosing,U extends Collection<? super T>> Flowable<U>	buffer(Flowable<? extends TOpening> openingIndicator, Function<? super TOpening,? extendsPublisher<? extends TClosing>> closingIndicator, Callable<U> bufferSupplier) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
Flowable<List<T>>	buffer(int count) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
<U extends Collection<? super T>> Flowable<U>	buffer(int count, Callable<U> bufferSupplier) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
Flowable<List<T>>	buffer(int count, int skip) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
<U extends Collection<? super T>> Flowable<U>	buffer(int count, int skip, Callable<U> bufferSupplier) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
Flowable<List<T>>	buffer(long timespan, long timeskip, TimeUnit unit) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
Flowable<List<T>>	buffer(long timespan, long timeskip, TimeUnit unit, Scheduler scheduler) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
<U extends Collection<? super T>> Flowable<U>	buffer(long timespan, long timeskip, TimeUnit unit, Scheduler scheduler,Callable<U> bufferSupplier) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
Flowable<List<T>>	buffer(long timespan, TimeUnit unit) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
Flowable<List<T>>	buffer(long timespan, TimeUnit unit, int count) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
Flowable<List<T>>	buffer(long timespan, TimeUnit unit, Scheduler scheduler) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
Flowable<List<T>>	buffer(long timespan, TimeUnit unit, Scheduler scheduler, int count) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
<U extends Collection<? super T>> Flowable<U>	buffer(long timespan, TimeUnit unit, Scheduler scheduler, int count,Callable<U> bufferSupplier, boolean restartTimerOnMaxSize) Returns a Flowable that emits buffers of items it collects from the source Publisher. 返回一个Flowable，它发出从源Publisher收集的项目的缓冲区。
<B> Flowable<List<T>>	buffer(Publisher<B> boundaryIndicator) Returns a Flowable that emits non-overlapping buffered items from the source Publisher each time the specified boundary Publisher emits an item. 返回一个Flowable，每次指定的边界Publisher发出项目时，它都会从源Publisher发出非重叠的缓冲项。
<B,U extends Collection<? super T>> Flowable<U>	buffer(Publisher<B> boundaryIndicator, Callable<U> bufferSupplier) Returns a Flowable that emits non-overlapping buffered items from the source Publisher each time the specified boundary Publisher emits an item. 返回一个Flowable，每次指定的边界Publisher发出项目时，它都会从源Publisher发出非重叠的缓冲项。
<B> Flowable<List<T>>	buffer(Publisher<B> boundaryIndicator, int initialCapacity) Returns a Flowable that emits non-overlapping buffered items from the source Publisher each time the specified boundary Publisher emits an item. 返回一个Flowable，每次指定的边界Publisher发出项目时，它都会从源Publisher发出非重叠的缓冲项。

buffer测试用例

buffer的重载方法太多，这里不一一举例

测试代码
  @Test
    public void buffer3() {
        System.out.println("######buffer3#####");
        Flowable.just(10, 22, 13, 74, 52)
                .buffer(2)//三个元素打包成一个元素
                .subscribe(new Consumer<List<Integer>>() {
                    @Override
                    public void accept(List<Integer> integers) throws Exception {
                        System.out.println(integers.toString());
                    }
                });
    }
测试结果：
######buffer3#####
[10, 22]
[13, 74]
[52]

 

buffer测试用例分析

buffer操作符是把多个元素按照指定数量打包成一个元素一次过发送数据，上面测试用例实际上每次把2个元素组合成一个List发送。

至于其他重载方法，都是类似的作用，只是相应的配置不同。

buffer实用场景

后续完善

 

其他操作符

delay delaySubscription（辅助操作符）

delaySubscription（辅助操作符）

switchIfEmpty（条件操作符）

debounce（过滤操作符）去重复操作

count（统计操作符）

contains（条件操作符）

concatWith（连接操作符）

concatMap（变换操作符）

collect & collectInto

cast

cache

buffer