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• 1.0.2（2019/06/14） Added support to open the project node directly

Anchors is a graph-based structure that supports the asynchronous startup task to initialize the Android startup framework. Its anchor provides a "hook" dependency function that provides flexibility in solving complex synchronization problems during initialization. Refer to alpha and improve some of its details, which is more suitable for Android-initiated scenarios. It also supports optimizing the dependency initialization process and selecting a better path for initialization.

For the thinking about alpha, please see 关于Android异步启动框架alpha的思考

1. Add dependencies under the app module

   implementation 'com.effective.android:Anchors:1.0.2'
   

2. Add a dependency graph in Application

   AnchorsManager.getInstance().debuggable(true)
           .addAnchors(anchorYouNeed)
           .start(dependencyGraphHead);
   

   Where anchorYouNeed is the anchor point you need to add, dependencyGraphHead is the head of the dependency graph.

debuggale mode can print logs of different dimensions as debugging information output, and do Trace tracking for each dependent task. You can output trace.html for performance analysis by python systrace.py .

For code logic, please refer to the sample case under the app module.

Anchors defines different TAG for filtering logs, you need to open Debug mode.

• Anchors, The most basic TAG

• TASK_DETAIL, Filter details of dependent tasks

   2019-03-18 14:19:45.687 22493-22493/com.effective.android.sample D/TASK_DETAIL: TASK_DETAIL
   ======================= task (UITHREAD_TASK_A ) =======================
   | 依赖任务 :
   | 是否是锚点任务 : false
   | 线程信息 : main
   | 开始时刻 : 1552889985401 ms
   | 等待运行耗时 : 85 ms
   | 运行任务耗时 : 200 ms
   | 结束时刻 : 1552889985686
   ==============================================
  

• ANCHOR_DETAIL, Filter output anchor task information

   2019-03-18 14:42:33.354 24719-24719/com.effective.android.sample W/ANCHOR_DETAIL: anchor "TASK_100" no found !
   2019-03-18 14:42:33.354 24719-24719/com.effective.android.sample W/ANCHOR_DETAIL: anchor "TASK_E" no found !
   2019-03-18 14:42:33.355 24719-24719/com.effective.android.sample D/ANCHOR_DETAIL: has some anchors！( "TASK_93" )
   2019-03-18 14:42:34.188 24719-24746/com.effective.android.sample D/ANCHOR_DETAIL: TASK_DETAIL
   ======================= task (TASK_93 ) =======================
   | 依赖任务 : TASK_92
   | 是否是锚点任务 : true
   | 线程信息 : Anchors Thread #7
   | 开始时刻 : 1552891353984 ms
   | 等待运行耗时 : 4 ms
   | 运行任务耗时 : 200 ms
   | 结束时刻 : 1552891354188
   ==============================================
   2019-03-18 14:42:34.194 24719-24719/com.effective.android.sample D/ANCHOR_DETAIL: All anchors were released！
  

• DEPENDENCE_DETAIL, Filter dependency graph information

   2019-03-18 14:27:53.724 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_9_start(1552890473721) --> TASK_90 --> TASK_91 --> PROJECT_9_end(1552890473721)
   2019-03-18 14:27:53.724 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_9_start(1552890473721) --> TASK_90 --> TASK_92 --> TASK_93 --> PROJECT_9_end(1552890473721)
   2019-03-18 14:27:53.724 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_8_start(1552890473721) --> TASK_80 --> TASK_81 --> PROJECT_8_end(1552890473721)
   2019-03-18 14:27:53.724 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_8_start(1552890473721) --> TASK_80 --> TASK_82 --> TASK_83 --> PROJECT_8_end(1552890473721)
   2019-03-18 14:27:53.725 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_7_start(1552890473720) --> TASK_70 --> TASK_71 --> PROJECT_7_end(1552890473720)
   2019-03-18 14:27:53.725 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_7_start(1552890473720) --> TASK_70 --> TASK_72 --> TASK_73 --> PROJECT_7_end(1552890473720)
   2019-03-18 14:27:53.725 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_6_start(1552890473720) --> TASK_60 --> TASK_61 --> PROJECT_6_end(1552890473720)
   2019-03-18 14:27:53.725 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_6_start(1552890473720) --> TASK_60 --> TASK_62 --> TASK_63 --> PROJECT_6_end(1552890473720)
   2019-03-18 14:27:53.725 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_5_start(1552890473720) --> TASK_50 --> TASK_51 --> PROJECT_5_end(1552890473720)
   2019-03-18 14:27:53.725 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_5_start(1552890473720) --> TASK_50 --> TASK_52 --> TASK_53 --> PROJECT_5_end(1552890473720)
   2019-03-18 14:27:53.725 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_4_start(1552890473720) --> TASK_40 --> TASK_41 --> TASK_42 --> TASK_43 --> PROJECT_4_end(1552890473720)
   2019-03-18 14:27:53.726 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_3_start(1552890473720) --> TASK_30 --> TASK_31 --> TASK_32 --> TASK_33 --> PROJECT_3_end(1552890473720)
   2019-03-18 14:27:53.726 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_2_start(1552890473719) --> TASK_20 --> TASK_21 --> TASK_22 --> TASK_23 --> PROJECT_2_end(1552890473719)
   2019-03-18 14:27:53.726 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> PROJECT_1_start(1552890473719) --> TASK_10 --> TASK_11 --> TASK_12 --> TASK_13 --> PROJECT_1_end(1552890473719)
   2019-03-18 14:27:53.726 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> UITHREAD_TASK_B
   2019-03-18 14:27:53.726 22843-22843/com.effective.android.sample D/DEPENDENCE_DETAIL: UITHREAD_TASK_A --> UITHREAD_TASK_C
  

Below is the execution time given by Trace without using anchor points and using anchor points in the scene

The dependency graph has a UITHREAD_TASK_A -> TASK_90 -> TASK_92 -> Task_93 dependency. Assuming that our dependency path is a precondition for subsequent business, we need to wait for the business to complete before proceeding with its own business code. If not then we don't care about their end time. When using the anchor function, we hook TASK_93, and the priority from the beginning to the anchor will be raised. As you can see from the above figure, the time to execute the dependency chain is shortened.

The dependency graph is used to resolve the dependencies between tasks when the task is executed, and the anchor setting is used to resolve the synchronization relationship between the execution dependencies and the code call points.

The project was written only to improve the efficiency of day-to-day development and focus on the business. If you have a better practice or suggestions, please write to [email protected], ask Issues or initiate Pull requests, any problems will be resolved in the first time.