1 /*
2  * Copyright (C) 2024 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.example.tracing.demo.experiments
17 
18 import com.example.tracing.demo.FixedThreadB
19 import javax.inject.Inject
20 import javax.inject.Singleton
21 import kotlinx.coroutines.CoroutineDispatcher
22 import kotlinx.coroutines.coroutineScope
23 import kotlinx.coroutines.flow.SharingStarted
24 import kotlinx.coroutines.flow.flowOn
25 import kotlinx.coroutines.flow.shareIn
26 
27 @Singleton
28 class CancellableSharedFlow
29 @Inject
30 constructor(@FixedThreadB private var dispatcherB: CoroutineDispatcher) : Experiment {
31 
32     override val description: String = "Create shared flows that can be cancelled by the parent"
33 
startnull34     override suspend fun start() {
35         // GOOD - launched into child scope, parent can cancel this
36         coroutineScope {
37             coldCounterFlow("good")
38                 .flowOn(dispatcherB)
39                 .shareIn(this, SharingStarted.Eagerly, replay = 10)
40         }
41     }
42 }
43