Defines the event handler to be called when the host thread receives a message sent by the worker thread through **parentPort.postMessage**. The event handler is executed in the host thread.
Defines the event handler to be called when the host thread receives a message sent by the worker thread through **workerPort.postMessage**. The event handler is executed in the host thread.
@@ -2089,7 +2089,7 @@ Each actor concurrently processes tasks of the main thread. For each actor, ther
- Currently, a maximum of eight worker threads can co-exist.
- In API version 8 and earlier versions, when the number of **Worker** instances exceeds the upper limit, the error "Too many workers, the number of workers exceeds the maximum." is thrown.
- Since API version 9, when the number of **Worker** instances exceeds the upper limit, the business error "Worker initialization failure, the number of workers exceeds the maximum." is thrown.
- To proactively destroy a worker thread, you can call **terminate()** or **parentPort.close()** of the newly created **Worker** instance.
- To proactively destroy a worker thread, you can call **terminate()** or **workerPort.close()** of the newly created **Worker** instance.
- Since API version 9, if a **Worker** instance in a non-running state (such as destroyed or being destroyed) calls an API, a business error is thrown.
- Creating and terminating worker threads consume performance. Therefore, you are advised to manage available workers and reuse them.
- Do not use both **new worker.Worker** and **new worker.ThreadWorker** to create a **Worker** project. Otherwise, **Worker** functions abnormally. Since API version 9, you are advised to use [new worker.ThreadWorker](#constructor9). In API version 8 and earlier versions, you are advised to use [new worker.Worker](#constructordeprecated).