Please see the updated webrev:
http://cr.openjdk.java.net/~aivanov/8221412/webrev.1/
The difference between .0 and .1 is in some minor white-space
adjustments, like parameter alignment.
On 26/03/2019 17:01, Alexey Ivanov wrote:
Hi,
Please review the fix for jdk 13:
bug: https://bugs.openjdk.java.net/browse/JDK-8221412
webrev: http://cr.openjdk.java.net/~aivanov/8221412/webrev.0/
Description:
The list of printers is not updated in the situation where there are
no remote printers on the system and later the user adds a remote
printer.
Root cause:
JDK-8153732 [1] added a new thread which polls remote printers on the
system and updates the list if it detects a change. In this case it
does not update the print services because of this condition:
449 if (prevRemotePrinters != null && prevRemotePrinters.length > 0)
prevRemotePrinters is not null but its length is zero because no
remote printers were initially present on the system.
Fix:
I removed this if. We have to update the list printers if doCompare()
returns true. Either prevRemotePrinters or currentRemotePrinters, or
both can be null; doCompare() handles this situation gracefully after
JDK-8212202 [2].
The listener called getRemotePrintersNames() twice: in constructor and
in run() before entering the first sleep. Now it's done only once.
I consolidated the implementation of getAllPrinterNames() and
getRemotePrintersNames(). They were very similar. The old
implementation of getRemotePrintersNames() got the list of both local
and remote printers and then filtered out local ones. The new
implementation gets the list of remote printers only. So the
difference between the two is limited to the flags passed to
EnumPrinters.
If there are no remote printers, the new version
getRemotePrintersNames() returns null instead of empty array. As
mentioned earlier, doCompare() handles this situation.
I'll add the bugid (8221412) to the regression test when fixing
JDK-8221263 [3]. I'm currently working on it.
Thank you in advance.
Regards,
Alexey
[1] https://bugs.openjdk.java.net/browse/JDK-8153732
[2] https://bugs.openjdk.java.net/browse/JDK-8212202
[3] https://bugs.openjdk.java.net/browse/JDK-8221263
--
Regards,
Alexey
