DatDang
49 lines
1.2 KiB
Markdown
49 lines
1.2 KiB
Markdown
# 8. Handle heavy task with isolate
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Date: 2022-06-29
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## Status
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Accepted
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## Context
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- Use isolate to handle heavy task
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## Decision
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- Initialize the IsolateManager to help manage the list of tasks and isolate
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```
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final isolateManager = IsolateManager();
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await isolateManager.initialize(isolatesCount: 1);
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```
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+ `isolatesCount`: The number of isolates created and run concurrently. Depends on your device's processor.
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- Perform task processing by calling `execute` function
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```
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isolateManager.execute(
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arguments,
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handleTaskAction,
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onUpdateProgress
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);
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```
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+ `arguments`: Parameters passed to the function handling heavy tasks.
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+ `handleTaskAction`: Function to handle heavy tasks
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+ `onUpdateProgress`: Callback function every time a value is sent from `new isolate` to `main isolate` via `sendPort`
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- The return value is a `Completer`
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- Communicate between two isolates
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To see a visual representation of this process, take a look at the image below:
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<img src="../images/handle_task_with_isolate.png" alt="communicate_between_two_isolate">
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## Consequences
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- No UI block when handling long-term tasks.
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- Increase application performance, smoother application.
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## Reference
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- <img src="../images/handle_task_with_isolate.png" alt="worker_manager">
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