If you need to implement retry logic for an SDK that doesn't include it, you can follow these general steps to do so in Java:
Identify the type of exception or error that occurs when the SDK fails to complete a task, such as a network error, a timeout error, or a server error. You can usually find this information in the SDK documentation.
Determine the number of times you want to retry the operation, and how long you want to wait between retries. You can choose a fixed number of retries, or use an exponential backoff algorithm that increases the wait time between retries with each attempt.
Wrap the SDK method call in a try-catch block and catch the relevant exception or error. If the exception or error is recoverable, such as a network error or a server error, you can proceed with retrying the operation. If the exception or error is not recoverable, such as an authentication error or an invalid request, you should stop retrying and return the error to the caller.
Use a loop to retry the operation the specified number of times. Within the loop, use a sleep statement to wait for the specified time between retries.
If the operation succeeds within the specified number of retries, return the result to the caller. If the operation fails after all retries, return an error to the caller.
Here's an example of how you could implement retry logic for an SDK method call that may fail due to a network error:
javapublic static Object callSdkMethodWithRetry() throws Exception {
int maxRetries = 3;
long waitTime = 1000; // in milliseconds
for (int i = 0; i < maxRetries; i++) {
try {
Object result = sdkMethodCall(); // call the SDK method
return result;
} catch (IOException e) {
// catch network errors and retry the operation
if (i == maxRetries - 1) {
// if this is the last retry, rethrow the exception
throw e;
} else {
// otherwise, wait for the specified time and retry
Thread.sleep(waitTime);
waitTime *= 2; // exponential backoff
}
}
}
throw new Exception("Failed after maximum retries"); // if all retries fail
}
In this example, the sdkMethodCall()
method is called inside a loop that retries the operation up to three times if it fails due to a IOException
, which is the type of exception that may be thrown in case of a network error. The loop waits for one second between retries and doubles the wait time with each retry, up to a maximum of eight seconds for the third retry. If the operation succeeds, the result is returned to the caller. If the operation fails after all retries, an exception is thrown.