From 7295b4877fb1bc279f9932ab026d68133695647a Mon Sep 17 00:00:00 2001
From: Marco Del Tufo <marco.deltufo@exact-lab.it>
Date: Tue, 1 Aug 2023 10:02:08 +0000
Subject: [PATCH] Update as-api-listener.md

---
 .../server-side-extensions/as-api-listener.md                | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/software-developer-documentation/server-side-extensions/as-api-listener.md b/docs/software-developer-documentation/server-side-extensions/as-api-listener.md
index 0c66bc7154a..7fc6a014237 100644
--- a/docs/software-developer-documentation/server-side-extensions/as-api-listener.md
+++ b/docs/software-developer-documentation/server-side-extensions/as-api-listener.md
@@ -58,7 +58,10 @@ is provided with the V3 API jar and provides 3 methods:
     session token used for the operation, the operation result and any
     exception that happened during the operation.
 
-  
+
+| :warning: Implicit Requirements |
+|:---------------------------|
+| **Requirement 1:  The Listener should be Thread Safe Code**<br /><br />A single instance of the Listener is created during the server startup.<br /><br />Since a single instance is used to serve all requests thread safe code is a requirement.<br /><br />We strongly suggest to not to keep any state.<br /><br />**Requirement 2: The Listener should not throw Exceptions**<br /><br />If the listener throw an exception it will make the API call fail.<br /><br />**Requirement 3: The Listener should use IOperation and IOperationResult as indicated below**<br /><br />All API Operations go through every listener so the method signatures should use IOperation and IOperationResult.<br /><br />Please use instanceof for safe casting. |
 
 Implicit Requirements
 
-- 
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