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C# retry logic While loop


By : Seth Ziegler
Date : September 29 2020, 11:00 AM
I hope this helps you . I would recommend that you don't try and reinvent the wheel, and just re-use the Polly framework:
code :
var maxRetryAttempts = 3;

var retryPolicy = Policy
    .Handle<HttpRequestException>()
    .WaitAndRetryAsync(maxRetryAttempts, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2,retryAttempt)));

try {
  await retryPolicy.ExecuteAsync(async () =>
  {
    var response = await this.httpClientWrapper.......
    response.EnsureSuccessStatusCode();
  });
}
catch(HttpRequestException ex)
{
  // You've already retried 3 times and failed, do something else here
}
catch(Execption ex)
{
  // You've got a non-HttpRequestException, so we didn't retry.
}


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Does SQL Azure retry logic framework TransientFaultHandling ships with default retry policies?


By : user3765633
Date : March 29 2020, 07:55 AM
Does that help The transient fault handling framework comes with a few retry policies, including the SQL Azure one that you mentioned. You should not need to make any changes to it to do what you want it to do. The examples you see are there for reference so you could expand the framework if you wanted to apply it to something that hasn't already been catered for.

Python mock testing process with retry logic. Creating different mock in each retry


By : MosTec
Date : March 29 2020, 07:55 AM
I hope this helps . I encounter the similar issue before when I do mock test. This answer I followed and it is very helpful
is there a way to track the number of times a function is called?
code :
from collections import Counter

class CountingProxy():
    def __init__(self, instance):
        self._instance = instance
        self.count = Counter()

    def __getattr__(self, key):
        if hasattr(self._instance, key):
            self.count[key] += 1
        return getattr(self._instance, key)


>>> l = [1,2,3,4,5]
>>> cl = CountingProxy(l)
>>> cl.pop()
5
>>> cl.append(10)
>>> cl.index(3)
2
>>> cl.reverse()
>>> cl.reverse()
>>> cl.count
Counter({'reverse': 2, 'pop': 1, 'append': 1, 'index': 1})

Retry logic with CompletableFuture


By : Peter Power
Date : March 29 2020, 07:55 AM
I wish this helpful for you I think I was successfully. Here's an example class I created and the test code:
RetriableTask.java
code :
public class RetriableTask
{
    protected static final int MAX_RETRIES = 10;
    protected int retries = 0;
    protected int n = 0;
    protected CompletableFuture<Integer> future = new CompletableFuture<Integer>();

    public RetriableTask(int number) {
        n = number;
    }

    public CompletableFuture<Integer> executeAsync() {
        // Create a failure within variable timeout
        Duration timeoutInMilliseconds = Duration.ofMillis(1*(int)Math.pow(2, retries));
        CompletableFuture<Integer> timeoutFuture = Utils.failAfter(timeoutInMilliseconds);

        // Create a dummy future and complete only if (n > 5 && retries > 5) so we can test for both completion and timeouts. 
        // In real application this should be a real future
        final CompletableFuture<Integer> taskFuture = new CompletableFuture<>();
        if (n > 5 && retries > 5)
            taskFuture.complete(retries * n);

        // Attach the failure future to the task future, and perform a check on completion
        taskFuture.applyToEither(timeoutFuture, Function.identity())
            .whenCompleteAsync((result, exception) -> {
                if (exception == null) {
                    future.complete(result);
                } else {
                    retries++;
                    if (retries >= MAX_RETRIES) {
                        future.completeExceptionally(exception);
                    } else {
                        executeAsync();
                    }
                }
            });

        // Return the future    
        return future;
    }
}
int size = 10;
System.out.println("generating...");
List<RetriableTask> tasks = new ArrayList<>();
for (int i = 0; i < size; i++) {
    tasks.add(new RetriableTask(i));
}

System.out.println("issuing...");
List<CompletableFuture<Integer>> futures = new ArrayList<>();
for (int i = 0; i < size; i++) {
    futures.add(tasks.get(i).executeAsync());
}

System.out.println("Waiting...");
for (int i = 0; i < size; i++) {
    try {
        CompletableFuture<Integer> future = futures.get(i);
        int result = future.get();
        System.out.println(i + " result is " + result);
    } catch (Exception ex) {
        System.out.println(i + " I got exception!");
    }
}
System.out.println("Done waiting...");
generating...
issuing...
Waiting...
0 I got exception!
1 I got exception!
2 I got exception!
3 I got exception!
4 I got exception!
5 I got exception!
6 result is 36
7 result is 42
8 result is 48
9 result is 54
Done waiting...

SQS Lambda - retry logic?


By : Sergio
Date : March 29 2020, 07:55 AM
it should still fix some issue Here is how I did it.
Create Normal Queues (Immediate Delivery), Q1 Create Delay Queues (5 mins delay), Q2 Create DLQ (After retries), DLQ1

Retry Logic - retry whole class if one tests fails - selenium


By : gorgon112
Date : March 29 2020, 07:55 AM
will be helpful for those in need There's currently no way of achieving what you are asking for.
TestNG will only retry a failed test, but will not go up the execution ladder to find out all the upstream dependencies and try running them as well (Your ask is a very specific variant of this generic use case).
code :
public class SampleTest {

    @Test (retryAnalyzer = TestRetry.class)
    public void orchestrateTest() {
        firsttest();
        secondtest();
        thirdtest();
    }

    public void firsttest() {
        System.out.println();
        TestReporter.assertEquals("Test", "Test", "pass");
    }

    public void secondtest() {
        TestReporter.assertEquals("Test", "Test1", "fail");
    }

    public void thirdtest() {
        TestReporter.assertEquals("Test", "Test", "pass");
    }
}
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