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The time-out trick can be useful if you want to create an API for callers that can be used from any thread and you want to bridge that into a more simple threading model for providers. Providers can then be sure that everything is processed in a single thread. This, in turn, minimizes parallel execution problems on the provider s side. Remember to create a single processor thread that is used to handle requests from clients. Whenever a client calls into the API, simply post a future task to the processor. Then either return immediately if the method has no return value or block for a certain time-out period, during which time the processor should handle the request. If the time-out period is exceeded, simply throw an exception to the caller to signal the cancellation of the request. I prototyped this behavior when I tried to eliminate deadlocks in the NetBeans DataSystem API. Because almost all methods in that API deal with files, they can throw IOException. So, it was easy to create TimeoutException extends IOException and throw it after the time-out period. People already needed to check for IOException, so this code didn t complicate anything further. This solution would eliminate deadlocks as well. However, it might also increase the unpredictability of the system s behavior. After all, sometimes the time-out can occur when there is no deadlock. That is why this code is currently not used in NetBeans. However, I am sure it can effectively, and together with proper testing, reliably eliminate deadlocks if needed in the future. free pdf417 barcode generator c# How to read and create barcode images using C# and ZXing.NET ...
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