If I have a controller interface like this:
#RequestMapping(method = RequestMethod.GET, value = "/{CustomerId}/audit")
public #ResponseBody Long countAudit(
#PathVariable(value = "CustomerId") String customerId,
#RequestParam(value = "Users", required = false) List<String> users)
And I use RestTemplate to make a call, via getForObject, like so:
RestTemplate restTemplate = new RestTemplate();
List<String> users = new ArrayList<String>();
users.add("Bill");
users.add("John");
String customerId = "1234";
Long cnt = restTemplate.getForObject(url, Long.class, customerId, users);
Why does the first item in the List on the controller side, have a [ in front, while the last item has the matching ]?
On the client.. it looks like this: "Bill", "John"
on the controller(server), it looks like this: "[Bill", "John]"
Any ideas, and is there a way around this or to deal with this? Any other suggestions on how to pass a List<> via requestParam in resttemplate? Thanks for any advice..
The server side is not correct parsing the json format. Instead of parsing it, the server gives you the json string (["Bill", "John"]) of the complete message.
I can not tell you why the server is not parsing it correctly, but I hope that hint helps you to find the problem.
Related
#Controller
#PostMapping("/hello/{studentName}")
public ResponseEntity<Void> method1(
#RequestMapping(value = "/upload/{studentName}", method = RequestMethod.POST)
#ResponseBody
public String saveAuto(
#PathVariable(value = "name") String name,` `
#RequestParam("file") MultipartFile myFile) {
}
}
Hi, I am new to unit test. can anyone please help me for writing test case using mockmvcbuilderrequest..
I tried this but getting 404
mockMvc.perform(MockMvcRequestBuilders.multipart("/hello/{zoneName}","com.example")
.file(file).accept(MediaType.MULTIPART_FORM_DATA_VALUE))
You have 2 options.
Change the rest path and put: "/hello/{studentName}", in this way the test will work as you have explained.
Leave the rest path "/upload/{studentName}" and change the uri in the test from "/hello/{studentName}" to "/upload/{studentName}".
I leave the way to execute the test, with the correction.
mockMvc.perform(
MockMvcRequestBuilders.multipart("/upload/{studentName}","Anu Shree")
.file(file)
.accept(MediaType.MULTIPART_FORM_DATA_VALUE)
)
I hope it helps
I am working with Spring Data 2.0.6.RELEASE.
I am working about pagination for performance and presentation purposes.
Here about performance I am talking about that if we have a lot of records is better show them through pages
I have the following and works fine:
interface PersonaDataJpaCrudRepository extends PagingAndSortingRepository<Persona, String> {
}
The #Controller works fine with:
#GetMapping(produces=MediaType.TEXT_HTML_VALUE)
public String findAll(Pageable pageable, Model model){
Through Thymeleaf I am able to apply pagination. Therefore until here the goal has been accomplished.
Note: The Persona class is annotated with JPA (#Entity, Id, etc)
Now I am concerned about the following: even when pagination works in Spring Data about the amount the records, what about of the content of each record?.
I mean: let's assume that Persona class contains 20 fields (consider any entity you want for your app), thus for a view based in html where a report only uses 4 fields (id, firstname, lastname, date), thus we have 16 unnecessary fields for each entity in memory
I have tried the following:
interface PersonaDataJpaCrudRepository extends PagingAndSortingRepository<Persona, String> {
#Query("SELECT p.id, id.nombre, id.apellido, id.fecha FROM Persona p")
#Override
Page<Persona> findAll(Pageable pageable);
}
If I do a simple print in the #Controller it fails about the following:
java.lang.ClassCastException:
[Ljava.lang.Object; cannot be cast to com.manuel.jordan.domain.Persona
If I avoid that the view fails with:
Caused by:
org.springframework.expression.spel.SpelEvaluationException:
EL1008E:
Property or field 'id' cannot be found on object of type
'java.lang.Object[]' - maybe not public or not valid?
I have read many posts in SO such as:
java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to
I understand the answer and I am agree about the Object[] return type because I am working with specific set of fields.
Is mandatory work with the complete set of fields for each entity? Should I simply accept the cost of memory about the 16 fields in this case that never are used? It for each record retrieved?
Is there a solution to work around with a specific set of fields or Object[] with the current API of Spring Data?
Have a look at Spring data Projections. For example, interface-based projections may be used to expose certain attributes through specific getter methods.
Interface:
interface PersonaSubset {
long getId();
String getNombre();
String getApellido();
String getFecha();
}
Repository method:
Page<PersonaSubset> findAll(Pageable pageable);
If you only want to read a specific set of columns you don't need to fetch the whole entity. Create a class containing requested columns - for example:
public class PersonBasicData {
private String firstName;
private String lastName;
public PersonBasicData(String firstName, String lastName) {
this.firstName = fistName;
this.lastName = lastName;
}
// getters and setters if needed
}
Then you can specify query using #Query annotation on repository method using constructor expression like this:
#Query("SELECT NEW some.package.PersonBasicData(p.firstName, p.lastName) FROM Person AS p")
You could also use Criteria API to get it done programatically:
CriteriaBuilder cb = entityManager.getCriteriaBuilder();
CriteriaQuery<PersonBasicData> query = cb.createQuery(PersonBasicData.class);
Root<Person> person = query.from(Person.class);
query.multiselect(person.get("firstName"), person.get("lastName"));
List<PersonBasicData> results = entityManager.createQuery(query).getResultList();
Be aware that instance of PersonBasicData being created just for read purposes - you won't be able to make changes to it and persist those back in your database as the class is not marked as entity and thus your JPA provider will not work with it.
I have API like this-
/objectname/name
/objectname/collection/id
Both API's are indirectly related.
Problem occurs when calling first API with name value as "A/B Type". So rest controller actually calling second API rather first (/objectname/A/B Type) because forward slash. How to deal with this situation.
As a side note I am encoding the parameters values.
I developed the restful services using SpringBoot and RestTemplate.
The conflict comes by specifying the name directly in the resource path and passed to the function as a #PathVariable.
Your code looks something like this:
#RequestMapping(value = "objectname/{name}", method = RequestMethod.GET)
public String yourMethodName(#PathVariable String name){
return name;
}
What I would recommend in order to avoid this kind of conflict is (if you're allowed to modify the #RestController or #RepositoryRestResource layers) to pass the value of the object in a #RequestParam
For instance:
#RequestMapping(value = "/objectname", method = RequestMethod.GET)
public String yourMethodName(#RequestParam(name = "name", required = true) String name){
return name;
}
That said, When you are constructing your the request using RestTemplate then you should url encode your name (A%2FB%20Testing) and construct the following url:
http://localhost:8080/objectname?name=A%2FB%20Testing
I tested this locally and worked alright for me.
I am using spring data's elastic search module, but I am having troubles building a query. It is a very easy query though.
My document looks as follows:
#Document(indexName = "triber-sensor", type = "event")
public class EventDocument implements Event {
#Id
private String id;
#Field(type = FieldType.String)
private EventMode eventMode;
#Field(type = FieldType.String)
private EventSubject eventSubject;
#Field(type = FieldType.String)
private String eventId;
#Field(type = FieldType.Date)
private Date creationDate;
}
And the spring data repository looks like:
public interface EventJpaRepository extends ElasticsearchRepository<EventDocument, String> {
List<EventDocument> findAllOrderByCreationDateDesc(Pageable pageable);
}
So I am trying to get all events ordered by creationDate with the newest event first. However when I run the code I get an exception (also in STS):
Caused by: org.springframework.data.mapping.PropertyReferenceException: No property desc found for type Date! Traversed path: EventDocument.creationDate.
So it seems that it is not picking up the 'OrderBy' part? However a query with a findBy clause (eg findByCreationDateOrderByCreationDateDesc) seems to be okay. Also a findAll without ordering works.
Does this mean that the elastic search module of spring data doesn't allow findAll with ordering?
Try adding By to method name:
findAllByOrderByCreationDateDesc
I'm trying to map a "legacy" REST server using RESTEasy client.
The urls of this ws are mapped like this:
http://localhost/webservice/rest/server.php?wstoken=reallylongtokenhash&wsfunction=core_course_get_courses
The endpoint is always server.php, and the function to call is mapped using a queryparam.
#POST
#Path("/server.php")
#Produces("application/json")
List<Map<String, Object>> getCourses(
#QueryParam("wstoken") String token
, #QueryParam("wsfunction") String function
, #QueryParam("moodlewsrestformat") String format);
#POST
#Path("/server.php")
#Produces("application/json")
String createUser(
#QueryParam("wstoken") String token
, #QueryParam("wsfunction") String function
, #QueryParam("moodlewsrestformat") String format
, #Form User user);
which I call in this way
private static void getCourses() {
final MoodleRest client = ProxyFactory.create(MoodleRest.class, "http://localhost/webservice/rest/");
final List<Map<String, Object>> s = client.getCourses(token, "core_course_get_courses", "json");
System.out.println("s = " + s);
}
Let's ignore the fact that a "get_courses" method is mapped using a POST, and that the token are passed using the QueryParameter on this post, is it possible to avoid passing the function and the response format on every method? I would like to map it using the annotations.
I tried to write in directly into the #Path using
/server.php?function=core_course_get_courses
But obviously this is not the right way to proceed (plus, it doesn't work since it's escaped)
Maybe it would be better to use HttpServletRequest directly in your method and parse request parameters "by hand". I mean:
#POST
#Path("/server.php")
#Produces("application/json")
List<Map<String, Object>> getCourses(#Context HttpServletRequest request){
//parse request.getParameters()
}