Thanks for your reply.
Both of your proposed solutions mean using other interfaces in the Lambda
expressions. However most of my Lambda definitions are in my Service tier
classes (Spring beans), and the Service tier must be independent from the Web
tier, and the force of Wicket serialization (even for the service beans) breaks
the aforementioned rule. Is there another solution? Is it possible for Wicket
not to serialize the Spring beans? or is there another serialization mechanism
in Wicket not based on Serializable interface?
On Thursday, June 21, 2018, 5:44:00 AM GMT+4:30, Maxim Solodovnik
<solomax...@gmail.com> wrote:
Wicket7:
https://github.com/wicketstuff/core/blob/wicket-7.x/lambda-parent/lambda/src/main/java/org/wicketstuff/lambda/SerializableBiConsumer.java
WBR, Maxim
(from mobile, sorry for the typos)
On Thu, Jun 21, 2018, 08:13 Maxim Solodovnik <solomax...@gmail.com> wrote:
>
> https://cwiki.apache.org/confluence/display/WICKET/Migration+to+Wicket+8.0#MigrationtoWicket8.0-Provideserializableversionsofjava.util.function.(Supplier|Consumer|Function|BiConsumer)ASFJIRA5aa69414-a9e9-3523-82ec-879b028fb15bWICKET-5991
> <https://cwiki.apache.org/confluence/display/WICKET/Migration+to+Wicket+8.0#MigrationtoWicket8.0-Provideserializableversionsofjava.util.function.(Supplier%7CConsumer%7CFunction%7CBiConsumer)ASFJIRA5aa69414-a9e9-3523-82ec-879b028fb15bWICKET-5991>
>
> WBR, Maxim
> (from mobile, sorry for the typos)
>
> On Wed, Jun 20, 2018, 22:42 m.xinu <mehdi_x...@yahoo.com.invalid> wrote:
>
>> Hi,
>>
>> I'm using Apache Wicket 7.9.0 alongside Spring 5.0.5.RELEASE. In one of
>> my beans, I call some stream API containing multiple lambda expressions.
>> During that page execution, I get following exception:
>>
>> Caused by: java.io.NotSerializableException:
>> org.devocative.metis.service.data.ReportService$$Lambda$126/997816965
>>
>> and it is very strange for me since it is in one of my beans not in any
>> Wicket-related part.
>>
>> I've searched and I've found the Serializable casting solution, however
>> it results in a very complex syntax for my code. So is there any other
>> solution? Dose Wicket has a way for this type of serialization?
>>
>>
>> P.S: My block of code for stream:
>>
>> reports.parallelStream()
>> .filter(report ->
>> externalAuthorizationService == null ||
>> externalAuthorizationService.authorizeReport(report, null,
>> currentUser.getUserId())
>> )
>> .flatMap(report -> report.getGroups().stream().map(dataGroup -> new
>> KeyValueVO<>(dataGroup, report)))
>> .collect(Collectors.groupingBy(
>> KeyValueVO::getKey,
>> () -> new TreeMap<>(Comparator.comparing(DataGroup::getName)),
>> Collectors.mapping(
>> KeyValueVO::getValue,
>> Collectors.toList()))
>> );
>>
>>
