Leemoonsoo opened a new pull request #3873:
URL: https://github.com/apache/zeppelin/pull/3873
### What is this PR for?
This PR provides an instant visual feedback to improve user experience on
high latency network environment.
It focuses on improving 2 frequent user action
- Run paragraph(s)
- Swich visualization
In high latency network, the user may feel a short 'freeze' between action
(click) and any visual change in notebook.
While the paragraph is updated after get a response from server.
After this change, the paragraph will get immediate update after a user
action, without waiting for server response.
### What type of PR is it?
Improvement
### Todos
* [x] - Instant visual feedback on paragraph run
* [ ] - Instant visual feedback on visualization switch
* [ ] - Instant visual feedback on paragraph run (new ui)
* [ ] - Instant visual feedback on visualization switch (new ui)
### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-4985
### How should this be tested?
Can simulate high latency network by adding sleep in NotebookSocket.send()
method
```
---
a/zeppelin-server/src/main/java/org/apache/zeppelin/socket/NotebookSocket.java
+++
b/zeppelin-server/src/main/java/org/apache/zeppelin/socket/NotebookSocket.java
@@ -67,6 +67,9 @@ public class NotebookSocket extends WebSocketAdapter {
}
public synchronized void send(String serializeMessage) throws IOException
{
+ try {
+ Thread.sleep(1000);
+ } catch (InterruptedException e) {}
connection.getRemote().sendString(serializeMessage);
}
```
### Questions:
* Does the licenses files need update? no
* Is there breaking changes for older versions? no
* Does this needs documentation? no
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