com.vaadin.fusion

Class FusionController

java.lang.Object

com.vaadin.fusion.FusionController

@RestController
 @Import(value={FusionControllerConfiguration.class,FusionEndpointProperties.class})
 @ConditionalOnBean(annotation=Endpoint.class)
 @NpmPackage(value="@vaadin/fusion-frontend",version="0.0.17") @NpmPackage(value="@vaadin/form",version="0.0.17")
public class FusionController
extends Object

The controller that is responsible for processing Vaadin endpoint requests. Each class that is annotated with Endpoint gets its public methods exposed so that those can be triggered by a correct POST request, including the methods inherited from the other classes, excluding Object class ones. Other methods (non-public) are not considered by the controller.

For example, if a class with name TestClass that has the only public method testMethod was annotated with the annotation, it can be called via http://${base_url}/testclass/testmethod POST call, where ${base_url} is the application base url, configured by the user. Class name and method name case in the request URL does not matter, but if the method has parameters, the request body should contain a valid JSON with all parameters in the same order as they are declared in the method. The parameter types should also correspond for the request to be successful.

Field Summary

Fields

Modifier and Type	Field and Description
static String	VAADIN_ENDPOINT_MAPPER_BEAN_QUALIFIER A qualifier to override the request and response default json mapper.

Constructor Summary

Constructors

Constructor and Description
FusionController(com.fasterxml.jackson.databind.ObjectMapper vaadinEndpointMapper, ExplicitNullableTypeChecker explicitNullableTypeChecker, org.springframework.context.ApplicationContext context, EndpointRegistry endpointRegistry, CsrfChecker csrfChecker) A constructor used to initialize the controller.

Method Summary

Modifier and Type	Method and Description
org.springframework.http.ResponseEntity<String>	serveEndpoint(String endpointName, String methodName, com.fasterxml.jackson.databind.node.ObjectNode body, javax.servlet.http.HttpServletRequest request) Captures and processes the Vaadin endpoint requests.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

VAADIN_ENDPOINT_MAPPER_BEAN_QUALIFIER

public static final String VAADIN_ENDPOINT_MAPPER_BEAN_QUALIFIER

A qualifier to override the request and response default json mapper.

See Also:

FusionController(ObjectMapper, ExplicitNullableTypeChecker, ApplicationContext, EndpointRegistry, CsrfChecker), Constant Field Values

Constructor Detail

FusionController

public FusionController(@Autowired(required=false) @Qualifier(value="vaadinEndpointMapper")
                        com.fasterxml.jackson.databind.ObjectMapper vaadinEndpointMapper,
                        ExplicitNullableTypeChecker explicitNullableTypeChecker,
                        org.springframework.context.ApplicationContext context,
                        EndpointRegistry endpointRegistry,
                        CsrfChecker csrfChecker)

A constructor used to initialize the controller.

Parameters:

vaadinEndpointMapper - optional bean to override the default ObjectMapper that is used for serializing and deserializing request and response bodies Use VAADIN_ENDPOINT_MAPPER_BEAN_QUALIFIER qualifier to override the mapper.

explicitNullableTypeChecker - the method parameter and return value type checker to verify that null values are explicit

context - Spring context to extract beans annotated with Endpoint from

endpointRegistry - the registry used to store endpoint information

csrfChecker - the csrf checker to use

Method Detail

serveEndpoint

@PostMapping(path="/{endpoint}/{method}",
             produces="application/json;charset=UTF-8")
public org.springframework.http.ResponseEntity<String> serveEndpoint(@PathVariable(value="endpoint")
                                                                                                                                                                       String endpointName,
                                                                                                                                                                       @PathVariable(value="method")
                                                                                                                                                                       String methodName,
                                                                                                                                                                       @RequestBody(required=false)
                                                                                                                                                                       com.fasterxml.jackson.databind.node.ObjectNode body,
                                                                                                                                                                       javax.servlet.http.HttpServletRequest request)

Captures and processes the Vaadin endpoint requests.

Matches the endpoint name and a method name with the corresponding Java class and a public method in the class. Extracts parameters from a request body if the Java method requires any and applies in the same order. After the method call, serializes the Java method execution result and sends it back.

If an issue occurs during the request processing, an error response is returned instead of the serialized Java method return value.

Parameters:

endpointName - the name of an endpoint to address the calls to, not case sensitive

methodName - the method name to execute on an endpoint, not case sensitive

body - optional request body, that should be specified if the method called has parameters

request - the current request which triggers the endpoint call

Returns:

execution result as a JSON string or an error message string