momo-jun commented on a change in pull request #14315:
URL: https://github.com/apache/pulsar/pull/14315#discussion_r808818892
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File path: site2/docs/functions-develop.md
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@@ -100,7 +103,47 @@ func main() {
}
```
For complete code, see
[here](https://github.com/apache/pulsar/blob/77cf09eafa4f1626a53a1fe2e65dd25f377c1127/pulsar-function-go/examples/inputFunc/inputFunc.go#L20-L36).
+<!--END_DOCUSAURUS_CODE_TABS-->
+
+### Extended Pulsar Function SDK for Java
+This extended Pulsar Function SDK provides two addition interface to
initialize and release external resources.
+By using initialize interface, you could do things like initialize external
resources which only need one-time initialization when function instance
starting.
+By using close interface, you could close the referenced external resources
when function instance closing.
+
+> **Note**
+>
+> The extended Pulsar Function SDK for Java is available in Pulsar 2.10.0 and
later versions.
+> Before using it, you need to set up Pulsar Function worker 2.10.0 or later
versions.
+
+The following example uses the extended interface of Pulsar Function SDK for
Java to initialize RedisClient when function instance starting and release it
when function instance closing.
Review comment:
```suggestion
The following example uses the extended interface of Pulsar Function SDK for
Java to initialize RedisClient when the function instance starts and release it
when the function instance closes.
```
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