Resttemplate null pointer exception

Resttemplate null pointer exception. Jun 1, 2022 · I have a spring boot application that makes an API hit of other internal projects using the rest template which works fine and I am writing unit test cases for it but test case if failing due to Unexpected exception thrown: java. Then RestTemplate hides this by wrapping the IOException in an unchecked exception. Question posted in Redis The official documentation can be found here. But whenever getProductPrice (provided pid) is called it prints and returns null with NullPointerException on console. class); do you have any idea what's the problem with my test ? i spent hours without any result. item throws a NullPointerException since first is null. Overview. It would be nice of Spring to give an explanation, or if there is none, fix this. POST, httpEntity, MbsFtResponseData. I suppose that if body of response cannot be set, it will be some exception thrown and status code 5xx. private IssueDTO[] issues; public IssueDTO[] getIssues() {. Dec 18, 2012 · With the RestTemplate default constructor, Spring includes just about every converter except for RSS, XML and JSON, which depends on if Rome, JAXB or Jackson is on the classpath. findMe(someObject. //Arrange. To add exception handling to RestTemplate, we can catch exceptions that may occur during HTTP requests and handle them gracefully. Using Spring 4 in an annotation driven environment. Feb 9, 2022 · Then you need to inject this to your mockMvc. 5 hutool版本： 5. return issues; public void setIssues(IssueDTO[] issues) {. RestTemplate exchange mock is not working. pop(); b= vals. getEnvValue then mocking of restTemplate. Hot Network Questions Oct 11, 2019 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. exchange () method for calling the API. Service is always null. Jun 6, 2014 · Jun 6, 2014 at 1:13. Sep 22, 2016 · The ResponseErrorHandler#handleError() method is invoked from RestTemplate#handleResponseError(. In this tutorial, we’ll see common errors that lead to a NullPointerException on an Autowired field. I found similar situations but I did not help me. URL,HttpMethod. Jackson tries to serialize a field from its getter. restTemplate = restTemplate; HttpHeaders headers = new HttpHeaders(); headers. filter = filterVar; } filterVar is null when you call the above. sendRequest (request); function. class); if (response != null) {. I tried few different approaches like explicit approach using setter and @ContextConfiguration,TracerAutoConfiguration but its not working. junit. internal. Many applications need to invoke REST APIs for some or all of their functions. However, I have initialized the request object not sure why it is giving null pointer exception. To inject a bean into a field of your class, you have to load the Spring context, in your case the Spring Boot context. Maybe you did it accidentally. HttpClientErrorException: 400 Bad Request when using restTemplate. lang. currentSpan () method is not able to generate Span object in Spring Cloud Contract Test environment. postForEntity 1 RestTemplate return NULL to all parameters when posting form data Aug 3, 2022 · The null pointer exceptions can be prevented using null checks and preventive coding techniques. This means you are popping more elements than exist in your stack here : a=vals. ) which is invoked by RestTemplate#doExecute(. However, it returns the null pointer exception. while calling Get Request 1 Java "Null Pointer Exception" - responseEntity. Feb 24, 2021 · Description Hi, I'm getting NULL data while using LogbookClientHttpRequestInterceptor Example (Kotlin): val restTemplate = RestTemplate() val interceptor Jun 8, 2021 · java. ofSeconds(connectTimeout)). private static RestTemplate restTemplate; @Resource. Fortunately, it’s straightforward to create a RestClient instance with a configuration of the old RestTemplate: RestTemplate oldRestTemplate; RestClient restClient = RestClient. After take a good look at console, it's throwing ResourceAccessException. 3. Class MyService{ RestTemplate resttemplate = new RestTemplate(); public void handler(){ string token; token = restTemplate. service. Redis – Spring Boot Microservices – RestTemplate Null Pointer Exception in JUnit Test Dec 3, 2014 · 1. Mar 22, 2021 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand everything works fine even "BUILD SUCCESS". May 10, 2018 · Here is a list of 3 things you should check out. You have to initialize it with an implementation of your interface, such as your AveragingFilter: Sep 15, 2023 · 7. – Nov 4, 2020 · Null Pointer Exception JUnit Mockito. I am not able to figure out what's wrong with the mocking. will remove the NullPointer Exception your getting: @Bean public RestOperations restOperations(final ClientHttpRequestFactory clientHttpRequestFactory){ return new RestTemplate(clientHttpRequestFactory); } and do this , instead of "Application. May 21, 2016 · When trying to fetch this data, I use the following. When your stack is empty and you call pop, first. If instead the flow continues beyond the call without getting an exception, you should explicitely fail and Jan 8, 2024 · 1. blackboard. I see that when the someDao. Provide details and share your research! But avoid …. toString()); responseEntity. method — which returns a value of type String — to throw a NullPointerException when called. You probably wanted to return the value for the mocked object. NullPointerException at com. restTemplate = restTemplate } Jun 7, 2019 · When using @RunWith (SpringRunner. If you want Jackson to ignore this field, you can annotate the getter with @JsonIgnore or the class with @JsonIgnoreProperties and specify the property names. So specifying @SpringBootTest is what you are looking for : Mar 18, 2016 · Only beans managed by Spring can have @Autowire annotations. Can someone tell me whats is wron Jun 29, 2016 · I have 1 instance of RestTemplate that I reuse for different calls. December 29, 2021. POST, request, TargetObject. reflect. ). private RestTemplate restTemplate; @Override. Presentation of the Problem. I need to handle errors from different calls differently - apparently there is no way to do that with global handler - I need to provide a handler per request. Aug 14, 2017 · My Service class is below, followed by its test - @Service public class MyServiceImpl implements MyService { @Autowired private RestTemplate restTemplate; @Override Jul 7, 2021 · RestTemplate restTemplate =restTemplateBuilder. @Configuration public class CustomRestTemplate extends RestTemplate { @Autowired private CustomErrorHandler customErrorHandler; @PostConstruct public void init() { this. Dec 14, 2016 · But I want to make this work with an object not with a string. java:44) at java. getBody(); return response; } When trying to mock the restTemplate in my test class, it keeps throwing a NullPointerException on the line where the mock restTemplate is called: public void checkResponseIsNotNull() {. I have mocked RestTemplateBuilder, RestTemplate is not able to understand which field is causing NPE. RestTemplate offers templates for common scenarios by HTTP method Apr 11, 2020 · Writing JUNIT-5 for a GET REST Call My actual implementation is like below and its working fine. Dec 26, 2017 · I have looked examples over internet of using RestTemplate postFprEntity, getForEntity but didn't find any example that handle NPE. com May 11, 2024 · By default, the RestTemplate will throw one of these exceptions in the case of an HTTP error: HttpClientErrorException – in the case of HTTP status 4xx; HttpServerErrorException – in the case of HTTP status 5xx; UnknownHttpStatusCodeException – in the case of an unknown HTTP status Jan 8, 2024 · In this tutorial, we’ll see common errors that lead to a NullPointerException on an Autowired field. getBody(); response. GET, null, CustomerRes. when and thenReturn condition. answered Jul 14, 2014 at 17:16. and my Embedded class is this. In this case it gets an image for a person entity for its Id parameter and returns the byte array for it. Mar 17, 2019 · Spring RestTemplate : BadRequest 400,null. I tried to do @Autowired step to since I was running into the exception of NullPointer, but it's running into exception even after that. Following is my code:- 3. ofSeconds(readTimeout)) Throws null pointer exception. NativeMethodAccessorImpl. private RestTemplate restTemplate; this. Apr 29, 2021 · Im trying to mock the below rest call using mockito inside an unit test. You are correct, the problem I was having with my first method was that I was catching the wrong exception. String language) {. public void setFilter (NoiseFilter filterVar) { this. GET, value="/{userId}", produces = {MediaType. add Jan 9, 2015 · @webgeek - It is just an example so trying to make it as condensed as possible I hard coded some stuff that's why it still worked. Refactor the test. We're testing this class with SpringBootTest and Wiremock. I just tried to avoid asking user for providing the password and user name for ouath so I hard coded it in the source just for that purpose. You need to put the TestService in the constructor of TestApiController, so you can inject it when creating the object in the test. Apr 8, 2024 · The most common Jackson exceptions - the cause of the problem and the solution for each one. Can anyone guide me where I am doing wrong? Oct 21, 2018 · Use an argument matcher when arranging the mock as the instance being passed to the mocked dependency is different to what is passed when the test is exercised. So instead of when-thenReturn , you might type just when-then. The solution that I recommend is not work with null returns or variables on Java, try to avoid it. At this point I guess that your mock injection works fine as well. Jan 28, 2019 · Directly specifying the value in entity seems to be not the right way to test. HttpServerErrorException. optionsForAllow(fooResourceUrl); Apr 14, 2020 · when i run my junit, i am keep on getting null pointer exception at below step in my source code service. Indeed, the content of the JSON string is different Mar 22, 2021 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand Oct 14, 2015 · Null pointer exception when stubbing. Apr 26, 2016 · I need to write a custom ResponseErrorHandler that throws some very specific exceptions (that could extend IOException, because it's in the interface's signature). below is the sample code: Jul 27, 2016 · It might be an overkill but on a previous system I was working on we created a NonNullParametrized aspect which checked all methods in the business facade and threw an exception if the user supplied null. See full list on baeldung. If you enjoy reading my articles and want to help me out paying bills, please consider buying me a coffee ($5) or two ($10). class);just to check response from rest service without creating any java object,but I'm still getting same exception. id)=(:Id) and p. Look at below code examples showing how to avoid java. Apr 4, 2021 · I am new to JUnit and Mockito framework. api. in case of 200, my response is not null so I can do this : response. class) @SpringBootTest. In the services we then can mock this custom client, which is much easier than mocking RestTemplate/ WebClient. set(AUTHORIZATION, getAccessToken()); Mar 17, 2024 · Learn to configure a method call to throw an exception in Mockito. Jun 18, 2017 · I am using spring boot and java configs, buts @autowired does not seem to work. Below is the service class that I need to write test cases for. May 30, 2019 · You need to pass a RestTemplate instance to the RestTemplateUtil as a dependency for this to work, rather than instantiating it in the doGet method. Here I am trying to mock the rest template call and return a response entity. So with the code below I receive a UserRegistrations object with a null UserTokenResponse List. out. May 20, 2021 · Here I am trying to mock the RestTemplate and return a 200 status with a string response. In case of you're not writing test using the annotation style like this. public void sendUserId(String userId){. Jul 16, 2020 · I am using RestTemplate with Ribbon Client @LoadBalanced. you should check the stack is not empty before calling pop. postForObject (webServiceUrl,checkTaxesWrapper,String. ResponseEntity<OrderDocument> responseEntity = restTemplate. Sep 7, 2019 · Here is the first few lines of the Exception: java. Dec 3, 2014 · 1. Then, in the unit test pass the mock RestTemplate instance to the RestTemplateUtil. ResponseEntity<UserRegistrations> entity = restTemplate. The when creating the rest template: RestTemplate template = new RestTemplate(); template. Here is the code. . Jun 27, 2019 · Your code needs to do something about the possible NullPointerException when some exception is caught, because in this scenario the responseDto will be null. public void testPost() throws Exception {. Jan 31, 2020 · the NullPointerException in this line : ResponseEntity<TargetObject> response = restTemplate. 0. Spring Boot. postForObject (which is also declared with @Mock) goes pretty well. I'm trying to write a unit test case for the handler. I suspect that your component is not an actual Spring Bean, because if it was and then your context creation would fail during app startup. I am trying to call a 3rd party api to register player using REST API call which returns return the response from a 3rd party API. setConnectTimeout(Duration. In the unit test of TestNG, nullPointerException is always reported when using the mokito stub function, I did not find a Nov 8, 2019 · Buy me a coffee ☕. Apr 20, 2021 · I Am getting below Null Pointer Exception because tracer. I get a NPE, I have checked other questions in SO but I cant see the reason why this behavior. config = config; this. @RunWith(SpringJUnit4ClassRunner. Jun 26, 2014 · Assuming you want to test, that your method throws a NullPointerException as expected, then your test case has to assume that the control flow goes into your catch-block and you do nothing there which causes the test to become green. Maybe it was IntelliSense. Mocking RestTemplate exchange returns null. mock(RestTemplate. Nov 6, 2022 · 版本情况 JDK版本： openjdk_17. Mar 16, 2018 · I have a class which invokes a rest service using resttemplate. 5 @MockBean is returning null object. initMocks(restTemplateAnswer); jobService = new JobService(restTemplate); Now, before any test, I can construct the object under test with the RestTemplate behavior I need. pop(); // ERROR SHOWING HERE. getBody()" because "responseEntity" is null why it is defined as null. restTemplate Jun 17, 2022 · RestTemplate mock should be injected into the service under the test. sendMessage(dataBO, false); // here I am getting testService = null and causing exception. answered Dec 3, 2014 at 0:42. testSaveCourse(CourseServiceTest. Use OPTIONS to Get Allowed Operations. @Query("SELECT p FROM Restaurant p Where (p. elovell. restTemplate = restTemplateBuilder . Thanks in advance. mockMvc = MockMvcBuilders. This root invocation is wrapped in a try-catch block which catches IOException and rethrows it wrapped in a ResourceAccessException , which is a RestClientException . There are many ways to resolve this. REST-styled APIs are all around us. RestaurantRepository. ResponseStatusException is only used inside your controller. Mar 9, 2015 · 1. or so. junit. The Cucumber runner ( cucumber. springframework. getId. logger. NullPointerException. public void setRestTemplate ( RestTemplate restTemplate) {. Jan 30, 2019 · First of all: there is no magic in this world. But I am getting a null response and the function throws a Null Pointer Exception. client. getBody() // Null pointer Exception when calling from JUNIT. can anyone resolve it or had similar issue Mar 17, 2019 · 0. 5. This time everything works fine and fetched and printed the price without giving any exception on Spring boot side. GET, null, SampleDto. initMocks (this) then use this. E. Spring will encounter our 'ClassB' class while doing a package scan and will initialize its instance by calling the @Autowired annotated constructor. isNull() Apr 12, 2019 · private RestTemplate restTemplate; 这样注入的时候还是会出现空指针的,但是我仔细翻了一下别的博客都没有对这个的解决方式, 实际上我们可以采用下面方式进行注入. exchange(url, HttpMethod. First, let’s define a Spring component with an empty doWork method: public void doWork() {} Then, let’s define our service class. MultiValueMap<String, String> map = new LinkedMultiValueMap<>(); map. boot</groupId> <artifactId>spring-boot-starter-web</artifactId 1. Feb 13, 2018 · Yes, my annotations match annotations from your answer,but i'm still getting same exception. g. Your RestClient seems to be null most likely because @Autowired didn't work. Dec 20, 2022 · Wrap the RestTemplate/ WebClient with a Client component, which does not provide any business logic, just a nice API. Asking for help, clarification, or responding to other answers. base/jdk. Which are subclasses of RestClientException. RestTemplate is a class within the 1. When I am calling my service - time-service (logical identifier) using Discovery Server, which is running on two instances, it is throwing null pointer exception. deleted=false") Dec 11, 2020 · You probably should inject your RestTemplate and initialise the ResponseErrorHandler with the RestTemplateBuilder::errorHandler method. class), use @Autowired MockMvc mockmvc. setReadTimeout(Duration. I am using resttemplate. You can use Optional instead. java. Most likely, you mistyped returning function. . RestTemplate may throw various exceptions depending on the nature of the error, such as HttpClientErrorException for 4xx client errors, HttpServerErrorException for 5xx server errors, and more. Ensure that the mockMvc gets injected properly. getBody(); And my domain class looks like this: Nov 8, 2019 · The problem is that you are instantiating the class Main: Main main = new Main(); When you use Spring, you pass the control over instantiation to the Spring Container and you should absolutely not construct a class like this. getStatusCode(); if (status. RestTemplate mock can be injected into service via @InjectMocks annotation. GET,new HttpEntity<>(headers),OrderDocument. class). class": Sep 21, 2020 · 2. RestTemplate public class RestTemplate extends InterceptingHttpAccessor implements RestOperations. class, message. http. This will cause the mock to return null response as expected instances do not match. exchange(. My service implementation is as below. Sep 28, 2018 · I've started your application and works just fine. restTemplate. getPayload(). I tried many combinations but it is still giving NPE. class) or MockitoAnnotations. Oct 10, 2019 · public ClassB(ClassA classA){. But it throws me a Null pointer Exception. build (); Don't mix both Spring and Mockito runners. {. exchange(appUrl, HttpMethod. Return something for your Mock. NullPointerException in my Test class SpringBoot. Every time i try to run the junit test case , i get null pointer exception and also when i tried to hadle the exception everytime the function returns NULL value. class ); entity. Dependency injection is possible only due to dependency injection framework and Spring provides one of them. class); May 11, 2024 · 6. Jan 3, 2022 · 1. 3, classes with a single constructor can omit the @Autowired annotation. is2xxSuccessful()) {. First, let’s define a Spring component with an empty doWork method: @Component public class MyComponent { public void doWork() {} } Then, let’s define our service class. throw new RestClientException("some message"); }); Apr 21, 2017 · Inside DataSource class I want to do @Autowire of Spring service, but I get null pointer exception. Hence for applications to function gracefully, they need to consume APIs elegantly and consistently. info("Getting Information from Game for Player Details {}", playerRegisterRequest May 10, 2021 · I am new to JUnit and Mockito. APPLICATION_JSON_VALUE Dec 17, 2017 · Then I added a method that creates my object under test. answered Jun 8, 2019 at 17:01. getStatusCode(); – Jul 23, 2019 · @IshanTiwary, btw, if you get an exception only at mocking iCommonDataService. The exchange method executes the HTTP method against the specified URI template, passing in the parameters for replacement. setErrorHandler(customErrorHandler); } } @Component public class CustomErrorHandler implements ResponseErrorHandler { @Override Mar 31, 2019 · 2. standaloneSetup (service). Cucumber) doesn't load any Spring context. When using @RunWith (MockitoJunitRunner. ResponseEntity. The getter method might throw a NullPointerException for some reason. I tried to use String response = restTemplate. CourseServiceTest. Table Of Contents. create(oldRestTemplate); 8 Dec 29, 2021 · Complete Guide to Spring RestTemplate. Jun 26, 2018 · While running the test, I am getting NullPointerException at the line where I am giving the Mockito. getAll(); } } The ResourceNotFoundException and UnexpectedHttpException are my own unchecked exceptions. testService = testService; DataBO dataBO = convertBO(testForm); testService. UPDATE: I temporarily switched to a simple PHP Rest API and called uri. setErrorHandler(new ClientErrorHandler()); Now we get the slightly neater construct when making a request: try. HttpStatus status = response. this. The RestTemplate converts 4xx and 5xx status codes to HttpClientErrorException resp. Nov 24, 2018 · I am using Spring Boot 2. Matt T. classA = classA; System. or even like that. Aug 17, 2021 · RestTemplate Null pointer exception In Spring boot Application. Here I am trying to mock the rest template and wanted to return an HTTP Status of 200, but still, it returns a null value. You need to create a constructor for EnrollmentServiceClient service with RestTemplate parameter. RELEASE and trying to make POST request by Response Template#Exchange, below is my code where I also need too pass headers with some custom keys. That status code is then sent over the wire as a response to the client (in your case the TestRestTemplate ). 0. Jan 8, 2024 · RestClient is the successor of RestTemplate, and in older codebases, we’re very likely to encounter implementation using RestTemplate. So your cucumber step class is not Spring aware. Jan 7, 2015 · 4. CustomerResponse response = restTemplate. str); As of Spring 4. errorHandler(myResponseErrorHandler) can anyone help me to understand the problem? Aug 15, 2012 · Can you clarify whether it's throwing the exception on the line with when, or on the line within the test where getByCriteria is actually called? And post some more of your code - as others have said, you haven't really provided enough information to make it possible for us to diagnose what's wrong. String url = baseUrl + "/samples"; ResponseEntity<SampleDto> response =. GET, requestEntity, UserRegistrations. invoke0(Native Method) The test and dependencies portion of my build file: Jan 7, 2019 · Spring RestTemplate treats 400 HTTP code as an exception so my response variable is null, my client cannot get Http code and message code to know what hapend exactly. Your main class is not managed by Spring: it's created by you and not declared in a Spring context: Spring doesn't known anything about your class, and doesn't inject this property. web. exchange(uri, HttpMethod. 2. 1. Mar 29, 2018 · Update you code to below. @Component public class DatabaseDataSource implements NotesDataSource { @Autowired private NotesService notesService; public DatabaseDataSource(){ } @Override public List<Note> getAll() { return notesService. My dispatcher servlet is configured as follows: My class in which I am trying to autowire RestTemplate is as follows: @Autowired. asked Jan 31, 2020 at 15:21. Make sure that you have the package included into package scanning. NullPointerException: Cannot invoke "org. Maven : <dependency> <groupId>org. ResponseEntity<MbsFtResponseData> response = restTemplate. Add @AutoConfigureMockMvc to your test so that your test class declaration looks like: @AutoConfigureMockMvc. issues = issues; However,I get a null pointer exception when trying to get the data. getBody()" because "response" is null Jul 20, 2017 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Exception Handling. 8. When I print the request object in the unit test it returns null. You can do: restTemplate = Mockito. I would set the responseType as String and run it with the debugger to see why it's not finding the correct converter. – Nemanja. toString()) execute it does NOT trigger my MockDao return statement, but instead tries to evaluate someObject. toString(). exchange(mbsUrl, HttpMethod. In your controller, you are creating a new UserDaoImpl : @RequestMapping(method = RequestMethod. println(classA. Here is a code snippet. public SomeUtil(RestTemplate restTemplate) { this. Feb 3, 2021 · Getting exception org. getBody(). class); mockMvc = new MockMvc(restTemplate); P/S: If mockMvc is the one you're gonna test, so don't name it as prefix mock, it's confused. Example of working test: so it is null here and that reference propagates to the SensorData object you are testing. We’ll also explain how to fix the problem. 9（请确保最新尝试是否还有问题） 问题描述（包括截图） 默认信任管理器 Apr 20, 2019 · You can create your own custom resttemplate and define exception handler. Synchronous client to perform HTTP requests, exposing a simple, template method API over underlying HTTP client libraries such as the JDK HttpURLConnection, Apache HttpComponents, and others. Next, we’re going to have a quick look at using an OPTIONS request and exploring the allowed operations on a specific URI using this kind of request; the API is optionsForAllow: Set<HttpMethod> optionsForAllow = restTemplate. java. lw rz vx bv ww gq lm ga oa ah