workavia-mail-front/docs/adr/0008-handle-heavy-task-with-isolate.md

8. Handle heavy task with isolate

Date: 2022-06-29

Status

Accepted

Context

• Use isolate to handle heavy task

Decision

• Initialize the IsolateManager to help manage the list of tasks and isolate

final isolateManager = IsolateManager();
await isolateManager.initialize(isolatesCount: 1);

• isolatesCount: The number of isolates created and run concurrently. Depends on your device's processor.

• Perform task processing by calling execute function

isolateManager.execute(
    arguments,
    handleTaskAction,
    onUpdateProgress
);

• arguments: Parameters passed to the function handling heavy tasks.
• handleTaskAction: Function to handle heavy tasks
• onUpdateProgress: Callback function every time a value is sent from new isolate to main isolate via sendPort

• The return value is a Completer

• Communicate between two isolates To see a visual representation of this process, take a look at the image below:

Consequences

• No UI block when handling long-term tasks.
• Increase application performance, smoother application.

Reference

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