[OpenJDK 2D-Dev] Integrated: 8263311: Watch registry changes for remote printers update instead of polling

[Alexey Ivanov]

On Wed, 10 Mar 2021 15:38:27 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

> [JDK-8153732](https://bugs.openjdk.java.net/browse/JDK-8153732) implemented polling for remote printers.
> That bug description also mentions watching the registry for changes and links to the article which describes the method yet it does so in terms of WMI. Using WMI is not necessary to watch for the registry updates.
> 
> It is possible to replace polling mechanism with registry change notifications. If the registry at `HKCU\Printers\Connections` is updated, refresh the list of print services.
> 
> It works perfectly well in my own testing with sharing a Generic / Text Only printer from another laptop. The notification comes as soon as the printer is installed, it results in a new key created under `Connections`. If a remote printer is removed, the notification is also triggered as the key corresponding to that printer is removed from the registry.
> 
> I updated the steps in the manual test: `RemotePrinterStatusRefresh.java`.

This pull request has now been integrated.

Changeset: a85dc557
Author:    Alexey Ivanov <aivanov at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/a85dc557
Stats:     207 lines in 3 files changed: 31 ins; 158 del; 18 mod

8263311: Watch registry changes for remote printers update instead of polling

Reviewed-by: psadhukhan, serb

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PR: https://git.openjdk.java.net/jdk/pull/2915