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RxReplayingShare

An RxJava 2 transformer which combines replay(1), publish(), and refCount() operators.

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Statistics on RxReplayingShare

Number of watchers on Github 485
Number of open issues 0
Average time to close an issue about 5 hours
Main language Java
Average time to merge a PR less than a minute
Open pull requests 1+
Closed pull requests 1+
Last commit about 2 years ago
Repo Created over 3 years ago
Repo Last Updated over 1 year ago
Size 536 KB
Organization / Authorjakewharton
Latest Releasereplaying-share-parent-1.0.0
Contributors1
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RxJava Replaying Share

ReplayingShare is an RxJava 2 transformer which combines replay(1), publish(), and refCount() operators.

Unlike traditional combinations of these operators, ReplayingShare caches the last emitted value from the upstream observable or flowable only when one or more downstream subscribers are connected. This allows expensive upstream sources to be shut down when no one is listening while also replaying the last value seen by any subscriber to new ones.

marble diagram

Apply with compose to an upstream Observable or Flowable and cache the resulting instance for all new subscribers.

@Singleton class Chart {
  private final Observable<Bitmap> chart;

  @Inject Chart(Observable<List<Data>> data) {
    chart = data.debounce(1, SECONDS)
        .map(list -> bigExpensiveRenderChartToBitmapFunction(list))
        .compose(ReplayingShare.instance());
  }

  Observable<Bitmap> data() {
    return chart;
  }
}

Download

Maven:

<dependency>
  <groupId>com.jakewharton.rx2</groupId>
  <artifactId>replaying-share</artifactId>
  <version>2.0.1</version>
</dependency>

Gradle:

compile 'com.jakewharton.rx2:replaying-share:2.0.1'

If you use Kotlin, a package with an extension method for both Observable and Flowable is provided. Replace the replaying-share artifact ID above with replaying-share-kotlin.

Snapshots of the development version are available in Sonatype's snapshots repository.

License

Copyright 2016 Jake Wharton

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.
RxReplayingShare open issues Ask a question     (View All Issues)
  • about 3 years RxJava 2.x variant
RxReplayingShare open pull requests (View All Pulls)
  • RxJava 2.0.1 and small tweaks.
RxReplayingShare list of languages used
RxReplayingShare latest release notes
replaying-share-parent-1.0.0 1.0.0

Initial release.

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