# Create a customized transaction for any function or code
**URL:** https://discuss.elastic.co/t/create-a-customized-transaction-for-any-function-or-code/274520
**Category:** APM
**Tags:** go
**Created:** [May 31, 2021, 2:20pm UTC](https://discuss.elastic.co/t/create-a-customized-transaction-for-any-function-or-code/274520 "2021-05-31T14:20:02Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@karim-pai](https://discuss.elastic.co/u/karim-pai)
#### Post date: [May 31, 2021, 2:20pm UTC](https://discuss.elastic.co/t/create-a-customized-transaction-for-any-function-or-code/274520/1 "2021-05-31T14:20:02Z")
Hi,
Is it possible to create/trigger a transaction for any given part of the code (apart from http or gRPC request).
I know it is possible in python [custom code instrumentation](https://www.elastic.co/guide/en/apm/agent/python/current/instrumenting-custom-code.html)
E.g. I want to instrument this function
```auto
func hello(){
transaction := apm.DefaultTracer.StartTransaction("hello", "code")
defer transaction.End()
fmt.Println("Hello World")
}
```
Apm agent does not start the transaction when the above function is called.
Thanks for your feedback
---
### Author:  [@axw](https://discuss.elastic.co/u/axw)
#### Post date: [June 1, 2021, 1:39am UTC](https://discuss.elastic.co/t/create-a-customized-transaction-for-any-function-or-code/274520/2 "2021-06-01T01:39:49Z")
@karim-pai welcome to the forum!
Is your program short-lived? If so, you will need to run the tracer's [Flush](https://pkg.go.dev/go.elastic.co/apm#Tracer.Flush) method before exiting to give a chance for the events to be sent to the server first. Add `apm.DefaultTracer.Flush(nil)` somewhere in your program and see if that helps.
---
### Author:  [@karim-pai](https://discuss.elastic.co/u/karim-pai)
#### Post date: [June 1, 2021, 9:36am UTC](https://discuss.elastic.co/t/create-a-customized-transaction-for-any-function-or-code/274520/3 "2021-06-01T09:36:12Z")
Hi @axw ,
Indeed, flushing the tracer works. Go Apm agent does not send immediately the transaction to Apm Server as python agent does.
Thanks for your help.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 22, 2021, 5:37am UTC](https://discuss.elastic.co/t/create-a-customized-transaction-for-any-function-or-code/274520/4 "2021-06-22T05:37:08Z")
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