subject:"Serialization Problem for Streams' Lambda used in Spring beans"

Re: Serialization Problem for Streams' Lambda used in Spring beans

2018-06-21 Thread Sven Meier


Wicket way:

        final IModel>> listPerGroup = 
LoadableDetachableModel.of(() -> reportService.listPerGroup());


        add(new ListView("group", () -> new 
ArrayList<>(listPerGroup.getObject().keySet())) {

            @Override
            protected void populateItem(ListItem groupItem) {
                groupItem.add(new ListView("report", () -> 
listPerGroup.getObject().get(groupItem.getModelObject())) {

            @Override
            protected void populateItem(ListItem 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> and I render the result in two nested ListView as follows:


         final Map> listPerGroup = 
reportService.listPerGroup();

             add(new ListView("group", new 
ArrayList<>(listPerGroup.keySet())) {

                 @Override
                 protected void populateItem(ListItem groupItem) {
                     DataGroup group = groupItem.getModelObject();  
  ...

                 groupItem.add(new ListView("report", 
listPerGroup.get(group)) {

                         @Override
                         protected void populateItem(ListItem 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 
 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 
 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 
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 <
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  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



WBR, Maxim
(from mobile, sorry for the typos)

On Wed, Jun 20, 2018, 22:42 m.xinu  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

Re: Serialization Problem for Streams' Lambda used in Spring beans

2018-06-21 Thread 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> and I render the result in two nested ListView as 
follows:

        final Map> listPerGroup = 
reportService.listPerGroup();

            add(new ListView("group", new 
ArrayList<>(listPerGroup.keySet())) {

                @Override
                protected void populateItem(ListItem groupItem) {
                    DataGroup group = groupItem.getModelObject();   
 ...

                groupItem.add(new ListView("report", 
listPerGroup.get(group)) {

                        @Override
                        protected void populateItem(ListItem 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 
 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 
> 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 
> 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 <
>> 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  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
>>> > 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  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 ->

Re: Serialization Problem for Streams' Lambda used in Spring beans

2018-06-21 Thread Sven Meier


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 
 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 
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 <
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  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



WBR, Maxim
(from mobile, sorry for the typos)

On Wed, Jun 20, 2018, 22:42 m.xinu  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

2018-06-21 Thread Andrea Del Bene

That's strange. Could you show the full exception stack trace?

On Thu, Jun 21, 2018 at 1:26 PM, m.xinu 
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.delb...@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 
> 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 <
> > 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 
> 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
> > >  > 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 
> 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

2018-06-21 Thread 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 
 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 
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 <
> 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  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
> >  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  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

2018-06-21 Thread Andrea Del Bene

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 
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 <
> 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  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
> >  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  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

2018-06-21 Thread m.xinu

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 
 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  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
> 
>
> WBR, Maxim
> (from mobile, sorry for the typos)
>
> On Wed, Jun 20, 2018, 22:42 m.xinu  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

2018-06-20 Thread Maxim Solodovnik

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  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
> 
>
> WBR, Maxim
> (from mobile, sorry for the typos)
>
> On Wed, Jun 20, 2018, 22:42 m.xinu  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

2018-06-20 Thread Maxim Solodovnik

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  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()))
>);
>
>

Serialization Problem for Streams' Lambda used in Spring beans

2018-06-20 Thread m.xinu

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

Re: Serialization Problem for Streams' Lambda used in Spring beans

Re: Serialization Problem for Streams' Lambda used in Spring beans

Re: Serialization Problem for Streams' Lambda used in Spring beans

Re: Serialization Problem for Streams' Lambda used in Spring beans

Re: Serialization Problem for Streams' Lambda used in Spring beans

Re: Serialization Problem for Streams' Lambda used in Spring beans

Re: Serialization Problem for Streams' Lambda used in Spring beans

Re: Serialization Problem for Streams' Lambda used in Spring beans

Serialization Problem for Streams' Lambda used in Spring beans

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