How Can I Efficiently Determine File Lock Status Without Using Try/Catch Blocks?

Farewell to TRY/CATCH: Solution of high -efficiency detection file locking status

The traditional TRY/CATCH block method detects the lock state efficiency. This article provides a more stable alternative, which can accurately detect file locks without relying on the traditional TRY/CATCH mechanism.

Solution: Customized file flow processing

The core of our solution is to create a custom file manager class, which uses the review mechanism to process the file flow. The working principle is as follows:

Define the name, maximum number of retries, and retry intervals of the file.

Implement a GetStream () method, which accepts file access permissions as parameters.

• Inside the getStream () method, enter a retry cycle and try to use file.open () to open the file.
• If the file.open () fails and throws an IOEXception anomalies, check whether the error indicates that the file is locked (using the ISFileLocked () method).
• If the file is not locked, the abnormality is thrown again. If the file is locked, an increased trial counter is increasing and dormant in the specified time interval.
• If the maximum number of retries and the files are still locked, a custom abnormalities are thrown, which contains detailed information about failed attempts.
Verify file lock

isfileLocked () method determines whether the IOEXception is locked by the file by extracting an error code from an exception. If the error code corresponds to 32 (read lock) or 33 (write lock), it means that the file is locked.

Implement examples

The following code fragments demonstrate how to use custom file managers:

Conclusion

By achieving custom file flow processing mechanisms, developers can efficiently check the file lock and use a customized retry strategy to process the locking files without using the TRY/CATCH block. This method provides a more accurate and flexible way to manage the file lock in the application.

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