spring restservice asynchronous logging functionality - spring

Question

I had written rest services in spring that is running perfectly fine.
Now, I need to add perform some db transactions before returning response to user.
This db transaction is independent to response retrieved.
For example,
#PostMapping("login")
public TransactionResponse loginAuthentication(#Valid #RequestBody LoginRequestBody loginRequest) {
TransactionResponse transactionResponse = new TransactionResponse();
try {
transactionResponse = loginService.validateUser(loginRequest);
//independent transaction needs to be executed in a separate thread
loginSerice.addLoginLog(transactionResponse);
//return below response without waiting to compelete above log transaction
return transactionResponse;
}
catch (Exception e) {
return CommonUtils.setErrorResponse(transactionResponse, e);
}
}
I read upon async controller in spring mvc link. Although controller
executes respective functionality in a separate thread but I don't want to wait for db transaction to be completed. After getting response from service layer, it should be forwarded to user without any delay.
Any Suggestions !!
Spring version is 4.3

Answer 1

I posted this answer to help the fellow developers with same kind of requirement (to execute a void function in a separate thread).
Since I am not experienced in multithreading/asynchronous environment, I want to keep it simple by using spring asynchronous methods.
So, First I created the Thread Pool
#Configuration
#EnableAsync
public class ThreadConfig {
#Bean
public TaskExecutor threadPoolTaskExecutor() {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
executor.setCorePoolSize(4);
executor.setMaxPoolSize(4);
executor.setThreadNamePrefix("WEBAPP");
executor.initialize();
return executor;
}
}
Then I created a service that will execute my code in a separate thread.
#Async
#Service
#Transactional
public class LoggingService {
public void logintransaction() throws Exception{
System.out.println("start login loggin");
Thread.sleep(5000);
System.out.println("exit");
}
}
Lastly, I called the above service on my controller. As I can see Total Time Taken is printed first, then "start login loggin" is printed. This means my new method is executed in a new thread.
#Autowired
private LoggingService loggingService;
#PostMapping("login")
public TransactionResponse loginAuthentication(#Valid #RequestBody LoginRequestBody loginRequest) {
long startTime = System.currentTimeMillis();
TransactionResponse transactionResponse = new TransactionResponse();
try {
transactionResponse = loginService.validateUser(loginRequest);
//independent transaction needs to be executed in a separate thread
//loginSerice.addLoginLog(transactionResponse);
loggingService.logintransaction();
//return below response without waiting to compelete above log transaction
System.err.println("Total Time Taken=>"+(System.currentTimeMillis() - startTime));
return transactionResponse;
}
catch (Exception e) {
return CommonUtils.setErrorResponse(transactionResponse, e);
}
}
Thanks