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Posted to users@wicket.apache.org by "m.xinu" <me...@yahoo.com.INVALID> on 2018/06/20 15:38:00 UTC
Serialization Problem for Streams' Lambda used in Spring beans
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()))
);
Re: Serialization Problem for Streams' Lambda used in Spring beans
Posted by Sven Meier <sv...@meiers.net>.
Wicket way:
final IModel<Map<DataGroup, List<Report>>> listPerGroup =
LoadableDetachableModel.of(() -> reportService.listPerGroup());
add(new ListView<DataGroup>("group", () -> new
ArrayList<>(listPerGroup.getObject().keySet())) {
@Override
protected void populateItem(ListItem<DataGroup> groupItem) {
groupItem.add(new ListView<Report>("report", () ->
listPerGroup.getObject().get(groupItem.getModelObject())) {
@Override
protected void populateItem(ListItem<Report> item) {
// try not to call getModelObject() too early,
use models instead
final Report report = item.getModelObject();
}
});
}
});
Have fun
Sven
Am 21.06.2018 um 16:38 schrieb m.xinu:
> yes, thank you, that's the reason! The problem is the Comparator in TreeMap.
>
> I prefer to use your second proposed solution, however my service returns Map<DataGroup, List<Report>> and I render the result in two nested ListView as follows:
>
> final Map<DataGroup, List<Report>> listPerGroup = reportService.listPerGroup();
>
> add(new ListView<DataGroup>("group", new ArrayList<>(listPerGroup.keySet())) {
>
> @Override
> protected void populateItem(ListItem<DataGroup> groupItem) {
> DataGroup group = groupItem.getModelObject(); ...
>
> groupItem.add(new ListView<Report>("report", listPerGroup.get(group)) {
>
> @Override
> protected void populateItem(ListItem<Report> item) {
> final Report report = item.getModelObject(); ...
> }
> });
> }
> });
>
> In this approach, is it possible to use LoadableDetachableModel or I must change my return type? I want to learn the Wicket way.
> On Thursday, June 21, 2018, 4:48:25 PM GMT+4:30, Sven Meier <sv...@meiers.net> wrote:
>
> Hi,
>
> your service method is return a TreeMap holding a lambda comparator:
>
> Comparator.comparing(DataGroup::getName)
>
> Either you make that comparator serializable (you can but you don't *need* to use org.danekja as Wicket does it):
>
> https://stackoverflow.com/questions/22807912/how-to-serialize-a-lambda
>
> ... or don't keep the result of your service method in the Wicket component tree, e.g. by using a LoadableDetachableModel.
>
> Have fun
> Sven
>
>
>
>
> Am 21.06.2018 um 13:26 schrieb m.xinu:
>> I manually create the Spring context, which is ClassPathXmlApplicationContext, and pass it to Wicket application by calling
>>
>> getComponentInstantiationListeners().add(new SpringComponentInjector(this, MyApp.get().getApplicationContext())).
>>
>> Then, In my panel I have this
>>
>> private class ReportMenuPanel extends WPanel {
>> private static final long serialVersionUID = -9012565863392514416L;
>>
>> @Inject
>> private IReportService reportService;
>>
>> ...
>> }
>>
>> I also checked my code with @SpringBean and I got the same exception.
>>
>>
>> On Thursday, June 21, 2018, 3:30:29 PM GMT+4:30, Andrea Del Bene <an...@gmail.com> wrote:
>>
>> I think you are keeping a reference to your Spring bean in a page or in a
>> component, that's why Wicket is trying to serialize it. Are you injecting
>> this bean with @SpringBean annotation?
>>
>> On Thu, Jun 21, 2018 at 12:45 PM, m.xinu <me...@yahoo.com.invalid>
>> wrote:
>>
>>> 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 <
>>> solomax666@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 <so...@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 <me...@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()))
>>>>> );
>>>>>
>>>>>
>>
>
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>
>
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Re: Serialization Problem for Streams' Lambda used in Spring beans
Posted by "m.xinu" <me...@yahoo.com.INVALID>.
yes, thank you, that's the reason! The problem is the Comparator in TreeMap.
I prefer to use your second proposed solution, however my service returns Map<DataGroup, List<Report>> and I render the result in two nested ListView as follows:
final Map<DataGroup, List<Report>> listPerGroup = reportService.listPerGroup();
add(new ListView<DataGroup>("group", new ArrayList<>(listPerGroup.keySet())) {
@Override
protected void populateItem(ListItem<DataGroup> groupItem) {
DataGroup group = groupItem.getModelObject(); ...
groupItem.add(new ListView<Report>("report", listPerGroup.get(group)) {
@Override
protected void populateItem(ListItem<Report> item) {
final Report report = item.getModelObject(); ...
}
});
}
});
In this approach, is it possible to use LoadableDetachableModel or I must change my return type? I want to learn the Wicket way.
On Thursday, June 21, 2018, 4:48:25 PM GMT+4:30, Sven Meier <sv...@meiers.net> wrote:
Hi,
your service method is return a TreeMap holding a lambda comparator:
Comparator.comparing(DataGroup::getName)
Either you make that comparator serializable (you can but you don't *need* to use org.danekja as Wicket does it):
https://stackoverflow.com/questions/22807912/how-to-serialize-a-lambda
... or don't keep the result of your service method in the Wicket component tree, e.g. by using a LoadableDetachableModel.
Have fun
Sven
Am 21.06.2018 um 13:26 schrieb m.xinu:
> I manually create the Spring context, which is ClassPathXmlApplicationContext, and pass it to Wicket application by calling
>
> getComponentInstantiationListeners().add(new SpringComponentInjector(this, MyApp.get().getApplicationContext())).
>
> Then, In my panel I have this
>
> private class ReportMenuPanel extends WPanel {
> private static final long serialVersionUID = -9012565863392514416L;
>
> @Inject
> private IReportService reportService;
>
> ...
> }
>
> I also checked my code with @SpringBean and I got the same exception.
>
>
> On Thursday, June 21, 2018, 3:30:29 PM GMT+4:30, Andrea Del Bene <an...@gmail.com> wrote:
>
> I think you are keeping a reference to your Spring bean in a page or in a
> component, that's why Wicket is trying to serialize it. Are you injecting
> this bean with @SpringBean annotation?
>
> On Thu, Jun 21, 2018 at 12:45 PM, m.xinu <me...@yahoo.com.invalid>
> wrote:
>
>> 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 <
>> solomax666@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 <so...@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 <me...@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()))
>>>> );
>>>>
>>>>
>>
>
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Re: Serialization Problem for Streams' Lambda used in Spring beans
Posted by Sven Meier <sv...@meiers.net>.
Hi,
your service method is return a TreeMap holding a lambda comparator:
Comparator.comparing(DataGroup::getName)
Either you make that comparator serializable (you can but you don't *need* to use org.danekja as Wicket does it):
https://stackoverflow.com/questions/22807912/how-to-serialize-a-lambda
... or don't keep the result of your service method in the Wicket component tree, e.g. by using a LoadableDetachableModel.
Have fun
Sven
Am 21.06.2018 um 13:26 schrieb m.xinu:
> I manually create the Spring context, which is ClassPathXmlApplicationContext, and pass it to Wicket application by calling
>
> getComponentInstantiationListeners().add(new SpringComponentInjector(this, MyApp.get().getApplicationContext())).
>
> Then, In my panel I have this
>
> private class ReportMenuPanel extends WPanel {
> private static final long serialVersionUID = -9012565863392514416L;
>
> @Inject
> private IReportService reportService;
>
> ...
> }
>
> I also checked my code with @SpringBean and I got the same exception.
>
>
> On Thursday, June 21, 2018, 3:30:29 PM GMT+4:30, Andrea Del Bene <an...@gmail.com> wrote:
>
> I think you are keeping a reference to your Spring bean in a page or in a
> component, that's why Wicket is trying to serialize it. Are you injecting
> this bean with @SpringBean annotation?
>
> On Thu, Jun 21, 2018 at 12:45 PM, m.xinu <me...@yahoo.com.invalid>
> wrote:
>
>> 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 <
>> solomax666@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 <so...@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 <me...@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()))
>>>> );
>>>>
>>>>
>>
>
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Re: Serialization Problem for Streams' Lambda used in Spring beans
Posted by Andrea Del Bene <an...@gmail.com>.
That's strange. Could you show the full exception stack trace?
On Thu, Jun 21, 2018 at 1:26 PM, m.xinu <me...@yahoo.com.invalid>
wrote:
> I manually create the Spring context, which is
> ClassPathXmlApplicationContext, and pass it to Wicket application by
> calling
>
> getComponentInstantiationListeners().add(new
> SpringComponentInjector(this, MyApp.get().getApplicationContext())).
>
> Then, In my panel I have this
>
> private class ReportMenuPanel extends WPanel {
> private static final long serialVersionUID = -9012565863392514416L;
>
> @Inject
> private IReportService reportService;
>
> ...
> }
>
> I also checked my code with @SpringBean and I got the same exception.
>
>
> On Thursday, June 21, 2018, 3:30:29 PM GMT+4:30, Andrea Del Bene <
> an.delbene@gmail.com> wrote:
>
> I think you are keeping a reference to your Spring bean in a page or in a
> component, that's why Wicket is trying to serialize it. Are you injecting
> this bean with @SpringBean annotation?
>
> On Thu, Jun 21, 2018 at 12:45 PM, m.xinu <me...@yahoo.com.invalid>
> wrote:
>
> > 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 <
> > solomax666@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 <so...@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 <me...@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()))
> > >> );
> > >>
> > >>
> >
> >
>
>
Re: Serialization Problem for Streams' Lambda used in Spring beans
Posted by "m.xinu" <me...@yahoo.com.INVALID>.
I manually create the Spring context, which is ClassPathXmlApplicationContext, and pass it to Wicket application by calling
getComponentInstantiationListeners().add(new SpringComponentInjector(this, MyApp.get().getApplicationContext())).
Then, In my panel I have this
private class ReportMenuPanel extends WPanel {
private static final long serialVersionUID = -9012565863392514416L;
@Inject
private IReportService reportService;
...
}
I also checked my code with @SpringBean and I got the same exception.
On Thursday, June 21, 2018, 3:30:29 PM GMT+4:30, Andrea Del Bene <an...@gmail.com> wrote:
I think you are keeping a reference to your Spring bean in a page or in a
component, that's why Wicket is trying to serialize it. Are you injecting
this bean with @SpringBean annotation?
On Thu, Jun 21, 2018 at 12:45 PM, m.xinu <me...@yahoo.com.invalid>
wrote:
> 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 <
> solomax666@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 <so...@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 <me...@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()))
> >> );
> >>
> >>
>
>
Re: Serialization Problem for Streams' Lambda used in Spring beans
Posted by Andrea Del Bene <an...@gmail.com>.
I think you are keeping a reference to your Spring bean in a page or in a
component, that's why Wicket is trying to serialize it. Are you injecting
this bean with @SpringBean annotation?
On Thu, Jun 21, 2018 at 12:45 PM, m.xinu <me...@yahoo.com.invalid>
wrote:
> 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 <
> solomax666@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 <so...@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 <me...@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()))
> >> );
> >>
> >>
>
>
Re: Serialization Problem for Streams' Lambda used in Spring beans
Posted by "m.xinu" <me...@yahoo.com.INVALID>.
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 <so...@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 <so...@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 <me...@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()))
>> );
>>
>>
Re: Serialization Problem for Streams' Lambda used in Spring beans
Posted by Maxim Solodovnik <so...@gmail.com>.
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 <so...@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 <me...@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$$Lambda$126/997816965
>>
>> and it is very strange for me since it is in one of my beans not in any
>> Wicket-related part.
>>
>> I've searched and I've found the Serializable casting solution, however
>> it results in a very complex syntax for my code. So is there any other
>> solution? Dose Wicket has a way for this type of serialization?
>>
>>
>> P.S: My block of code for stream:
>>
>> reports.parallelStream()
>> .filter(report ->
>> externalAuthorizationService == null ||
>> externalAuthorizationService.authorizeReport(report, null,
>> currentUser.getUserId())
>> )
>> .flatMap(report -> report.getGroups().stream().map(dataGroup -> new
>> KeyValueVO<>(dataGroup, report)))
>> .collect(Collectors.groupingBy(
>> KeyValueVO::getKey,
>> () -> new TreeMap<>(Comparator.comparing(DataGroup::getName)),
>> Collectors.mapping(
>> KeyValueVO::getValue,
>> Collectors.toList()))
>> );
>>
>>
Re: Serialization Problem for Streams' Lambda used in Spring beans
Posted by Maxim Solodovnik <so...@gmail.com>.
https://cwiki.apache.org/confluence/display/WICKET/Migration+to+Wicket+8.0#MigrationtoWicket8.0-Provideserializableversionsofjava.util.function.(Supplier|Consumer|Function|BiConsumer)ASFJIRA5aa69414-a9e9-3523-82ec-879b028fb15bWICKET-5991
WBR, Maxim
(from mobile, sorry for the typos)
On Wed, Jun 20, 2018, 22:42 m.xinu <me...@yahoo.com.invalid> wrote:
> Hi,
>
> I'm using Apache Wicket 7.9.0 alongside Spring 5.0.5.RELEASE. In one of my
> beans, I call some stream API containing multiple lambda expressions.
> During that page execution, I get following exception:
>
> Caused by: java.io.NotSerializableException:
> org.devocative.metis.service.data.ReportService$$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()))
> );
>
>