alertable | Messaging sending | Email library
kandi X-RAY | alertable Summary
kandi X-RAY | alertable Summary
GAE Messaging Utils - Email receiving and routing to callbacks for Google App Engine.
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Top functions reviewed by kandi - BETA
- Add a new event .
- Connect to GOOGLEICE .
- Initialize instance from inbound email message .
- Handle incoming message .
- Process a POST request .
- Speak a room .
- Main WSGI application .
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alertable Key Features
alertable Examples and Code Snippets
Community Discussions
Trending Discussions on alertable
QUESTION
Trying to understand how this works... do I have to create various threads to take advantage of the functionality for GetOverlappedResultEx? However why couldn't I just put GetOverlappedResult in a separate thread from the main thread to handle blocking of the IO and not interfere with main operations?
GetOverlappedResult function
https://docs.microsoft.com/en-us/windows/win32/api/ioapiset/nf-ioapiset-getoverlappedresult
Retrieves the results of an overlapped operation on the specified file, named pipe, or communications device. To specify a timeout interval or wait on an alertable thread, use GetOverlappedResultEx.
https://docs.microsoft.com/en-us/windows/win32/api/ioapiset/nf-ioapiset-getoverlappedresultex
Retrieves the results of an overlapped operation on the specified file, named pipe, or communications device within the specified time-out interval. The calling thread can perform an alertable wait.
https://docs.microsoft.com/en-us/windows/win32/fileio/alertable-i-o
...ANSWER
Answered 2021-Feb-04 at 00:17You handle threads, for concurrency, yourself.
There are basically three ways to do it:
Having initiated an overlapped (i.e., async completion) I/O operation you do something else and then every once in awhile poll the handle to see if the overlapped operation has completed. This is how you can use
GetOverlappedResultlooking forSTATUS_PENDINGto see if the operation isn't done yet.You sit around waiting for an overlapped operation to complete. But it's not as bad as that, because you can actually sit around waiting for any of a set of overlapped operations to complete. As soon as any one completes you handle it, and then loop around to wait for the rest. Handling it, of course, may fire off another asynch operation, you add that handle to the list. This is where you use
WaitForSingleObject{Ex}or betterWaitForMultipleObjects{Ex}.You use I/O Completion ports. Here you pass some handles to a kernel object called an I/O Completion port - this kernel object cleverly combines a thread pool (that it manages itself) with callbacks. It is a very efficient way of dealing with multiple - in fact, very many - async operations in-flight simultaneously. In these callbacks you can do whatever you want, including initiating more async operations and adding them to the same I/O Completion port.
There is also a fourth concept: alertable I/O, which executes a callback on an "APC" on your thread that initiated the I/O, provided your thread is in an "alertable" state - which means it is executing one or another of certain APIs that wait in the kernel. But I've never used it, as it seems to have drawbacks (such as only working on the thread that initiated the I/O, and that the environment the callback environment runs in isn't as clear as it could be) and if you're going to go that far just figure out I/O Completion ports and use them.
Options #2 and #3 of course involve concurrent programming - so in both cases you have to make sure your callbacks are thread-safe with respect to your other threads.
There are plenty of examples of all these methods out there on the intertubes.
QUESTION
I have set up a Winsock2 connection but I need to cover the case where internet is down. Here is my code;
...ANSWER
Answered 2020-Dec-31 at 09:24If you want to issue a recvfrom() and have it return immediately, then decide on your own how long to wait (I'm assuming Windows since you included winsock2.h), you can make an asynchronous OVERLAPPED request, then wait for the completion at any time by waiting for the hEvent member of the OVERLAPPED struct to be signaled.
Here's an updated sample based off your original code.
- you set the timeout by waiting as long as you need with WaitForSingleObject (below I wait for 10 seconds 6 times)
- by passing an OVERLAPPED pointer, you are indicating that you will wait for the completion yourself. Note that the OVERLAPPED struct cannot go out of scope until the hEvent is signaled. (or freed, if the OVERLAPPED was dynamically allocated).
- Letting the OVERLAPPED go out of scope before guaranteeing the IO completed is a common Winsock bug (I've been working on Winsock for over 10 years or so - I've seen many variations of this bug)
- As commented below, if you don't know hEvent has been signaled, then after calling closesocket you must wait for hEvent to be signaled before continuing - closesocket does not guarantee all asynchronous IO request have completed before returning.
QUESTION
Hi i have a requirement where i need to await for confirmation to finish.
Note: i cannot touch below code of my seniors within click(big chunk) or wrap them with .then(function(){..});
Here is what i tried but giving error:
...ANSWER
Answered 2020-Nov-03 at 14:44You need to rewrite showConfirmationAndWait to actually await for the confirmation and to return the result.
Also mark your entire handler as async.
QUESTION
I am currently trying to get the wintun driver to work with my program for simple tunneling (see: https://www.wintun.net/ ).
I successfully find and open the network device, but when it comes to registering the buffer, I get the result ERROR_INVALID_PARAMETER (87). Like I said, opening works just fine and registering is done with SYSTEM privileges (if this is not done, I get ERROR_ACCESS_DENIED (5)).
First attempt was to malloc the ring buffers, but after that did not work I looked at how OpenVPN does it (yes, it added wintun support) and they seem to do with with CreateFileMapping.
First of all, here is my struct:
...ANSWER
Answered 2020-Jul-08 at 15:59I can see a difference in your code when registering rings.
You are doing:QUESTION
I have a query where I get the client information, his loan and each payment that exceeds 30% of the agreed amount. Like if you had to pay 20 dollars and paid 30, it will show that payment. The thing is all the client data repeats if you make two or three payments in the same period. I already make that query. But for the report, I want to group that payment data into an array (I'm using rails and its to slow to make it with its methods) to print in an xlsx view. All the render part is done. The thing is convert the output from the query to the one that i expected:
...ANSWER
Answered 2020-Sep-29 at 00:04After some research I get this solution:
QUESTION
I'm trying to interface with a driver for creating TUN interfaces (WinTun), but in order to send and receive data from them I need to register a ring buffer. The code I'm using looks something like this (I omitted the part where I create the device with SetupApi, as that seems to be working):
...ANSWER
Answered 2020-May-02 at 19:57Found the solution. As @RbMm described, the code that creates the security descriptor only allows access to LocalSystem. That means that it is the only account allowed to talk to the driver.
QUESTION
When using GetOverlapedResult to get the result of an overlapped (i.e. asynchronous) I/O operation, you can ask GetOverlappdResult to "wait":
...ANSWER
Answered 2020-Jan-06 at 11:45Can i simulate a synchronous
ReadFileoperation but with a timeout, usingGetOverlappedResultEx?
yes, you can, exactly like you and try already. and this is not simulation. this will be exactly synchronous file read. because synchronous read - this is asynchronous read + wait in place when I/O complete. so code can be next:
QUESTION
I have a protocol I use to allow my ViewControllers to present an alert.
...ANSWER
Answered 2019-Aug-20 at 13:02You need to wait for the UIAlertController to be fully visible before running your assertion.
Check out XCTWaiter.
Try something like the below:
QUESTION
I have a protocol I attach to a UIViewController that I would like to allow the presentation of a UIAlertController.
ANSWER
Answered 2019-Jul-07 at 13:48I am trying to assert within a XCTestCase that clicking Yes calls the correct method on my view model ... I am really interested in testing the method itself.
It actually remains unclear what precisely you are wishing to test. Figuring that out (what actually needs testing?) is most of the battle. You know that result is true when the title is Yes, so there is no need to test anything about the actual tapping on this particular alert. Perhaps what you are asking to test is just this:
QUESTION
I am using alertable.js plugin. When I try Line breaks it's not working.
I try:
...ANSWER
Answered 2019-Feb-25 at 05:57The string you enter into confirm is what gets displayed as HTML. In HTML \n is not parsed as a line break, and thus is rendered normally.
Instead, you can use the HTML break tag html option to true:
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Install alertable
You can use alertable like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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