Brtdku

I have a bean named sampleBean scoped by viewScope .

this bean load some data from database (MySQL) .

my problem is some records shared between users .

now maybe [USER A] delete that shared record and i want to update view of other users .

I can not change scope to ApplicationScope because all records shared to all users .

How can fix this problem ?
Note : I read this post but can not understand how can fix this problem .
Note : I use Liberty 18.0.0.4 by JavaEE 8 (webProfile)

I fixed problem by this simple code . (I shared this code for you)

public class Information {

    private String name ;

    private String family ; 



    // constructor 

    // Getter & Setter 

    // override equal and hashCode



}

This is a simple service . (I simulated database on this class)

@Stateless

public class InformationService {



    private static final List<Information> db = new ArrayList<>();



    @Inject

    @Push(channel = "infoChannel")

    PushContext push;



    @PostConstruct

    public void init() {

        Information userA = new Information("John", "Vankate");

        Information userB = new Information("Julius", "Sampao");

        db.add(userA);

        db.add(userB);

    }



    public void remove(Information info) {

        db.remove(info);

        push.send("deleteInfo");

    }



    public List<Information> findAll() {

        return db;

    }

}

and simple JaxRs resources :

@Path("/info")

@RequestScoped

public class InformationResources {



    @EJB

    private InformationService informationService;





    @Path("/delete")

    @POST

    @Consumes("application/json")

    public String send(Information information) {

        informationService.remove(information);

        return "Receive : " + information;

    }

} 

Now Start JSF :

@Named

@ViewScoped

public class InformationBean implements Serializable {



    private Information info ;

    private List<Information> informationList ;



    @EJB

    private InformationService informationService ;





    @PostConstruct

    public void init() {

        informationList = informationService.findAll();

        info = new Information() ;

    }



    public void deleteInformation() {

        informationService.remove(info);

    }



    public Information getInfo() {

        return info;

    }



    public void setInfo(Information info) {

        this.info = info;

    }



    public List<Information> getInformationList() {

        return informationList;

    }



    public void setInformationList(List<Information> informationList) {

        this.informationList = informationList;

    }

}

and xhtml :

<h:body>

    <p:dataTable value="#{informationBean.informationList}" var="info" id="infoTable">

        <p:column rowHeader="name">

            <h:outputText value="#{info.name}"/>

        </p:column>

        <p:column rowHeader="family">

            <h:outputText value="#{info.family}"/>

        </p:column>

        <p:column rowHeader="action">

            <h:form>

                <p:commandButton value="Delete" action="#{informationBean.deleteInformation}">

                    <f:setPropertyActionListener value="#{info}" target="#{informationBean.info}"/>

                </p:commandButton>

            </h:form>

        </p:column>

    </p:dataTable>

    <hr/>

    <f:websocket channel="infoChannel">

        <p:ajax event="deleteInfo" update="infoTable"/>

    </f:websocket>

</h:body>

I already thought , PushContext must implemented on JSF beans , Now I understand can implement that in service or business logic layer .

Now you can remove information from JaxRs (Rest API) and record removed from p:dataTable without refresh page .
Note : this example use @ViewScoped