Issue when creating RestController that injects a Service that injects a Repository

awjamesfrj · September 24, 2017, 3:42am

Hi,

I was following this part of the documentation: Creating Custom OAuth2 Protected Controllers ( [url=]https://doc.cuba-platform.com/manual-6.6/rest_api_v2_custom_controllers.html[/url] )

I have created a RestController in the module web.
In the core module I have created the Service class and the Repository class (that uses the Persistence class)

The problem is that in the web module I cannot Inject the Service class that is in the core module

Here is the error I have got:

web:compileJava app\modules\web\src\com\company\architect\controller\ProjectController.java:5: error: package com.company.architect.service does not exist
import com.company.architect.service.ProjectService;
                                    ^
app\modules\web\src\com\company\architect\controller\ProjectController.java:16: error: cannot find symbol
    private ProjectService projectService;
            ^
  symbol:   class ProjectService
  location: class ProjectController
2 errors

FAILED

So how can I make this work ?

Thanks in advance for any help

James

mario · September 24, 2017, 11:50am

Hi,

you can take a look at my sample application you’ll find attached.

It works, from your information it seems to be that you try to access a class that is in core directly from the web module, if I guess right here…

Just take a look at the example.

Bye
Mario

cuba-example-rest-controller-service.zip (37.2K)

awjamesfrj · September 25, 2017, 12:35am

Hi Mario,

Your project helped me a lot thank you.

I am not having dependency issues anymore but I am having this error when I try to access the resource:

java.lang.IllegalStateException: Cannot get unfetched attribute [createTs] from detached object com.company.architect.entity.Project-a72774ba-34fd-15a8-9562-89e9d79f94ac [detached].

The full stack is below. Do you know what can be this time ?

org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON document: Cannot get unfetched attribute [createTs] from detached object com.company.architect.entity.Project-a72774ba-34fd-15a8-9562-89e9d79f94ac [detached]. (through reference chain: com.company.architect.entity.Project[&quot;createTs&quot;]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Cannot get unfetched attribute [createTs] from detached object com.company.architect.entity.Project-a72774ba-34fd-15a8-9562-89e9d79f94ac [detached]. (through reference chain: com.company.architect.entity.Project[&quot;createTs&quot;])
	org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:286)
	org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:106)
	org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:231)
	org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:174)
	org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:113)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
	org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
	org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	com.haulmont.restapi.auth.CubaAnonymousAuthenticationFilter.doFilter(CubaAnonymousAuthenticationFilter.java:66)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationProcessingFilter.doFilter(OAuth2AuthenticationProcessingFilter.java:176)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:96)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
	org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
	org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
	org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
	com.haulmont.cuba.web.sys.CubaHttpFilter.handleNotFiltered(CubaHttpFilter.java:108)
	com.haulmont.cuba.web.sys.CubaHttpFilter.doFilter(CubaHttpFilter.java:95)
</pre><p><b>Root Cause</b></p><pre>com.fasterxml.jackson.databind.JsonMappingException: Cannot get unfetched attribute [createTs] from detached object com.company.architect.entity.Project-a72774ba-34fd-15a8-9562-89e9d79f94ac [detached]. (through reference chain: com.company.architect.entity.Project[&quot;createTs&quot;])
	com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:388)
	com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:348)
	com.fasterxml.jackson.databind.ser.std.StdSerializer.wrapAndThrow(StdSerializer.java:343)
	com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:697)
	com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
	com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:292)
	com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1429)
	com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:951)
	org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:279)
	org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:106)
	org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:231)
	org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:174)
	org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:113)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
	org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
	org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	com.haulmont.restapi.auth.CubaAnonymousAuthenticationFilter.doFilter(CubaAnonymousAuthenticationFilter.java:66)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationProcessingFilter.doFilter(OAuth2AuthenticationProcessingFilter.java:176)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:96)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
	org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
	org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
	org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
	com.haulmont.cuba.web.sys.CubaHttpFilter.handleNotFiltered(CubaHttpFilter.java:108)
	com.haulmont.cuba.web.sys.CubaHttpFilter.doFilter(CubaHttpFilter.java:95)
</pre><p><b>Root Cause</b></p><pre>java.lang.IllegalStateException: Cannot get unfetched attribute [createTs] from detached object com.company.architect.entity.Project-a72774ba-34fd-15a8-9562-89e9d79f94ac [detached].
	org.eclipse.persistence.internal.queries.EntityFetchGroup.onUnfetchedAttribute(EntityFetchGroup.java:98)
	com.haulmont.cuba.core.sys.persistence.CubaEntityFetchGroup.onUnfetchedAttribute(CubaEntityFetchGroup.java:61)
	org.eclipse.persistence.internal.jpa.EntityManagerImpl.processUnfetchedAttribute(EntityManagerImpl.java:2846)
	com.haulmont.chile.core.model.impl.AbstractInstance._persistence_checkFetched(AbstractInstance.java)
	com.haulmont.cuba.core.entity.StandardEntity._persistence_get_createTs(StandardEntity.java)
	com.haulmont.cuba.core.entity.StandardEntity.getCreateTs(StandardEntity.java:71)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:498)
	com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:664)
	com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:689)
	com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
	com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:292)
	com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1429)
	com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:951)
	org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:279)
	org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:106)
	org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:231)
	org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:174)
	org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:81)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:113)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
	org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
	org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	com.haulmont.restapi.auth.CubaAnonymousAuthenticationFilter.doFilter(CubaAnonymousAuthenticationFilter.java:66)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationProcessingFilter.doFilter(OAuth2AuthenticationProcessingFilter.java:176)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:96)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
	org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
	org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
	org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
	org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
	com.haulmont.cuba.web.sys.CubaHttpFilter.handleNotFiltered(CubaHttpFilter.java:108)
	com.haulmont.cuba.web.sys.CubaHttpFilter.doFilter(CubaHttpFilter.java:95)

Thanks in advance,

James

mario · September 25, 2017, 11:45am

This normally comes since the system level attributes are not defined in the _local view anymore (since 6.4+ i think). You can create a view for your project entity which extends “_local” and set “systemProperties = true”. When using this view to load your data with the dataManger, it will work.

I’m not 100% why this attribute are serialized by default while not being in the _local view, but anyway - this should do the trick!

Bye

awjamesfrj · September 26, 2017, 12:56am

Hi Mario,

I have created the view as you said (it is in the picture attached) but the same problem continues. Please look at my classes. Maybe I am doing something wrong. For example you return String and I return a Project (Object) and I need to return a List of Projects as well:

@RestController
@RequestMapping("/projects")
public class ProjectController {

    private  ProjectService projectService;

    @Inject
    public ProjectController(ProjectService projectService) {
        this.projectService = projectService;
    }

    @GetMapping("/")
    public List<Project> getAllProjects(){
        return projectService.getAllProjects();
    }

    @GetMapping("/{name}")
    public Project getProjectByName(@PathVariable("name") String name) {
        return projectService.findProjectByName(name);
    }

}


@Service(CustomerService.NAME)
public class CustomerServiceBean implements CustomerService {

    private final CustomerRepository customerRepository;

    @Inject
    public CustomerServiceBean(CustomerRepository customerRepository) {
        this.customerRepository = customerRepository;
    }

    @Override
    public Customer findCustomerByName(String customerName) {
        return customerRepository.findByName(customerName);
    }
}


@Component
public class CustomerRepositoryBean implements CustomerRepository {

    private final DataManager dataManager;

    @Inject
    public CustomerRepositoryBean(DataManager dataManager) {
        this.dataManager = dataManager;
    }

    @Override
    public Customer findByName(String customerName) {
        LoadContext<Customer> lc = LoadContext.create(Customer.class)
                .setQuery(LoadContext.createQuery("select e from architect$Customer e where e.name = :customerName")
                        .setParameter("customerName", customerName));

        return dataManager.load(lc);
    }

}

Thanks for your help

James

view-created

mario · September 26, 2017, 5:44pm

yes, this is true. it will not work because you just defined the view, but did not use it when loading the data through the dataManager.

To make it work you have to set the view in your loadContext.


LoadContext<Customer> lc = LoadContext.create(Customer.class)
                .setQuery(LoadContext.createQuery("select e from architect$Customer e where e.name = :customerName")
                        .setParameter("customerName", customerName));
lc.setView('project-view');
return dataManager.load(lc);

If you have problems understanding or not really aware of the idea behind views, I would encourage you to take a look at the blog post i wrote some time ago: Road to CUBA and beyond - Views - the uncharted mystery

Bye
Mario