By definition, you&#39;re creating a custom route and Spring `HATEOAS` is an opinionated set of frameworks meant so you don&#39;t have to lift a finger. What you are trying to do, and what Spring `HATEOAS` is doing are contradictory. So, you will have to manually create the payload if you want embedded hyperlinks. 

Although, this shouldn&#39;t be too difficult if you set your owner content handler for your specific return type on that route. 

What are the tradeoffs between ReasonML (https://reasonml.github.io/) and TypeScript (https://www.typescriptlang.org/)?

ReasonML vs TypeScript

If I receive a request of type `http.Request`, how can I read the value of a specific header? In this case I want to pull the value of a jwt token out of the request header.

How can I read a header from an http request in golang?

Can we use spring `HATEOAS` on top of `RouterFunction` ? I imagine that we can specify the resource but what will be the equivalent of the `linkto(Controller.class)` ? or is there any equivalent to specify the link and use composition of `RouterFunction`

Using spring HATEOAS with spring webflux Functional Web Framework (reactor-netty)

<p>Can we use spring <code>HATEOAS</code> on top of <code>RouterFunction</code> ? I imagine that we can specify the resource but what will be the equivalent of the <code>linkto(Controller.class)</code> ? or is there any equivalent to specify the link and use composition of <code>RouterFunction</code></p>


I&#39;m trying to log a request using Spring 5 WebClient. Do you have any idea how could I achieve that? 

(I&#39;m using Spring 5 and Spring boot 2)

The code looks like this at the moment:


    try {
        return webClient.get().uri(url, urlParams).exchange().flatMap(response -&gt; response.bodyToMono(Test.class))
                .map(test -&gt; xxx.set(test));
    } catch (RestClientException e) {
        log.error(&quot;Cannot get counter from opus&quot;, e);
        throw e;
    }




how to log Spring 5 WebClient call

I&#39;m trying to run DMelt programs (http://jwork.org/dmelt/) program using Java9 (JDK9), and it gives me errors such as:


    WARNING: An illegal reflective access operation has occurred
    WARNING: Illegal reflective access by org.python.core.PySystemState (file:/dmelt/jehep/lib/jython/jython.jar) to method java.io.Console.encoding()
    WARNING: Please consider reporting this to the maintainers of org.python.core.PySystemState
    WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
    WARNING: All illegal access operations will be denied in a future release

How can I fix it? I was trying to add –illegal-access=permit to the last line of the script &quot;dmelt.sh&quot; (I&#39;m using bash in Linux), but this did not solve this problem. I&#39;m very frustrating with this. I was using this program very often, for very long time. Maybe I should never move to JDK9



JDK9: An illegal reflective access operation has occurred. org.python.core.PySystemState

I do user and invitation validation using the Optional facility

    @DeleteMapping(&quot;/friends/{username}&quot;)
    public
    HttpEntity&lt;Boolean&gt; removeFriend(
            @ApiParam(value = &quot;The user&#39;s name&quot;, required = true) @PathVariable String username
    ) {
        Long fromId = authorizationService.getUserId();

        return userService.findByUsername(username)
                .map(user -&gt; {
                     return friendshipService.findFriendship(fromId, user.getId())
                            .map(friendship -&gt; {
                                friendshipService.removeFriendship(friendship);

                                friendship.setToId(friendship.getFromId());
                                friendship.setFromId(friendship.getToId());

                                friendshipService.removeFriendship(friendship);

                                return ResponseEntity.ok(true);
                            }).orElseGet(() -&gt; ResponseEntity.notFound().build());
                }).orElseThrow(() -&gt; new ResourceNotFoundException(&quot;User not found&quot;));
However, `IntelliJ` is colouring my grey `return`, But when I remove the `return`, it highlights to me that there is no `return`.

Could someone explain how it works and what is it all about?

Statement lambda can be replaced with expression lambda

I&#39;m trying to run my JSQL parser class, but I&#39;m getting `Error: java: invalid source release 1.9`. 

I tried to following [this answer][1]. I changed File&gt; Build,Execution,Deployment&gt; Java Compiler&gt; Project bytecode version: 1.8.  However, I can&#39;t change the Module language level and Project language level to 1.8 because there&#39;s not option for that. I still get the same error below.

**Error**
[![enter image description here][2]][2]

**Code**

    package cs4321.project2;

    import java.io.FileReader;
    import net.sf.jsqlparser.parser.CCJSqlParser;
    import net.sf.jsqlparser.statement.Statement;
    import net.sf.jsqlparser.statement.select.Select;
    
    public class Parser {
        private static final String queriesFile = &quot;resources/input/queries.sql&quot;;
    
        public static void main(String[] args) {
            try {
                CCJSqlParser parser = new CCJSqlParser(new FileReader(queriesFile));
                Statement statement;
                while ((statement = parser.Statement()) != null) {
                    System.out.println(&quot;Read statement: &quot; + statement);
                    Select select = (Select) statement;
                    System.out.println(&quot;Select body is &quot; + select.getSelectBody());
                }
            } catch (Exception e) {
                System.err.println(&quot;Exception occurred during parsing&quot;);
                e.printStackTrace();
            }
        }
    }


  [1]: https://stackoverflow.com/a/42650624/7327018
  [2]: https://i.stack.imgur.com/XlBuf.png

intellij idea - Error: java: invalid source release 1.9

(I&#39;m new at Java programming)

I have for example:

    char x = &#39;9&#39;;

and I need to get the number in the apostrophes, the digit 9 itself.
I tried to do the following,
 
    char x = 9;
    int y = (int)(x);

but it didn&#39;t work.

So what should I do to get the digit in the apostrophes?

How can I convert a char to int in Java?


I am getting the following stacktrace:
-

    org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [referencedata.ABDeadlineType] to type [referencedata.DeadlineType]
    	at org.springframework.core.convert.support.GenericConversionService.handleConverterNotFound(GenericConversionService.java:324)
    	at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:206)
    	at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:187)
    	at org.springframework.data.repository.query.ResultProcessor$ProjectingConverter.convert(ResultProcessor.java:256)
    	at org.springframework.data.repository.query.ResultProcessor$ChainingConverter$1.convert(ResultProcessor.java:201)
    	at org.springframework.data.repository.query.ResultProcessor$ChainingConverter.convert(ResultProcessor.java:212)
    	at org.springframework.data.repository.query.ResultProcessor.processResult(ResultProcessor.java:149)
    	at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:121)
    	at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:106)
    	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:483)
    	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:461)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:56)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)
    	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:57)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
    	at com.sun.proxy.$Proxy143.findAllSummarizedBy(Unknown Source)
    	at 

My classes are the following
-


**DeadlineType** 

    @Data
    public class DeadlineType extends DefaultIdAndText {
        @Value(&quot;#{target.id}&quot;)
        String id;
    
        @Value(&quot;#{target.code}&quot;)
        String text;
    
        @Value(&quot;#{target.id}&quot;)
        public String getId() {
            return id;
        }
    
        @Value(&quot;#{target.code}&quot;)
        public String getText() {
            return text;
        }
    
    }

**ABDeadlineType**

    @Data
    @Entity
    @Table(name = &quot;deadline_type&quot;)
    @AllArgsConstructor
    @NoArgsConstructor
    public class ABDeadlineType {
    
        private @Id
        String id;
        private String code;
    }


**DefaultIdAndText** 

    @Data @AllArgsConstructor
    @NoArgsConstructor
    public class DefaultIdAndText implements IdAndText {
    
    	public DefaultIdAndText(IdAndText idAndText){
    		this.id = idAndText.getId();
    		this.text = idAndText.getText();
    	}
    
    	@NotEmpty String id;
    	String text;
    }


**DeadlineTypeRepository** 

    public interface DeadlineTypeRepository extends JpaRepository&lt;ABDeadlineType, Long&gt; {
        List&lt;DeadlineType&gt; findAllSummarizedBy();
    }


Update
-

Could it be an issue that the projection/mapping using `@Value(&quot;#{target.id}&quot;)` format, does not work correctly because these have been done on a class and not on an interface???

No converter found capable of converting from type to type

I am creating a REST Api using Spring boot, and auto generating the swagger documentation in controllers using swagger codegen. However, I am not able to set a description and example for a parameter of type String in a POST request. Here is mi code:
    
    import io.swagger.annotations.*;
    
    @Api(value = &quot;transaction&quot;, tags = {&quot;transaction&quot;})
    @FunctionalInterface
    public interface ITransactionsApi {
        @ApiOperation(value = &quot;Places a new transaction on the system.&quot;, notes = &quot;Creates a new transaction in the system. See the schema of the Transaction parameter for more information &quot;, tags={ &quot;transaction&quot;, })
        @ApiResponses(value = {
            @ApiResponse(code = 200, message = &quot;Another transaction with the same messageId already exists in the system. No transaction was created.&quot;),
            @ApiResponse(code = 201, message = &quot;The transaction has been correctly created in the system&quot;),
            @ApiResponse(code = 400, message = &quot;The transaction schema is invalid and therefore the transaction has not been created.&quot;, response = String.class),
            @ApiResponse(code = 415, message = &quot;The content type is unsupported&quot;),
            @ApiResponse(code = 500, message = &quot;An unexpected error has occurred. The error has been logged and is being investigated.&quot;) })
    
        @RequestMapping(value = &quot;/transaction&quot;,
            produces = { &quot;text/plain&quot; },
            consumes = { &quot;application/json&quot; },
            method = RequestMethod.POST)
        ResponseEntity&lt;Void&gt; createTransaction(
            @ApiParam(
                value = &quot;A JSON value representing a transaction. An example of the expected schema can be found down here. The fields marked with an * means that they are required.&quot; ,
                example = &quot;{foo: whatever, bar: whatever2}&quot;)
            @Valid @RequestBody String kambiTransaction) throws InvalidTransactionException;
    }

**The example property of the @ApiParam has been manually inserted by me, because the codegen was ignoring that part of the yaml (That is another question: why is the editor ignoring the example part?).** Here is part of the yaml:

    paths:
      /transaction:
        post:
          tags:
            - transaction
          summary: Place a new transaction on the system.
          description: &gt;
            Creates a new transaction in the system. See the schema of the Transaction parameter
            for more information
          operationId: createTransaction
          parameters:
            - $ref: &#39;#/parameters/transaction&#39;
          consumes:
            - application/json
          produces:
            - text/plain
          responses:
            &#39;200&#39;:
              description: Another transaction with the same messageId already exists in the system. No transaction was created.
            &#39;201&#39;:
              description: The transaction has been correctly created in the system
            &#39;400&#39;:
              description: The transaction schema is invalid and therefore the transaction has not been created.
              schema:
                type: string
                description: error message explaining why the request is a bad request.
            &#39;415&#39;:
              description: The content type is unsupported
            &#39;500&#39;:
              $ref: &#39;#/responses/Standard500ErrorResponse&#39;

    parameters:
      transaction:
        name: kambiTransaction
        in: body
        required: true
        description: A JSON value representing a kambi transaction. An example of the expected schema can be found down here. The fields marked with an * means that they are required.
        schema:
          type: string
          example:
            {
              foo*: whatever,
              bar: whatever2
            }

And finally, this is what swagger is showing:

[![enter image description here][1]][1]

Finally, the dependencies used in build.gradle are the following ones:

    compile group: &#39;io.springfox&#39;, name: &#39;springfox-swagger2&#39;, version: &#39;2.7.0&#39;
    compile group: &#39;io.springfox&#39;, name: &#39;springfox-swagger-ui&#39;, version: &#39;2.7.0&#39;

**So, Question is:**
Does anybody know how I can set the description and an example of a body parameter using swagger annotations?

***EDIT***

I&#39;ve achieved to change the description using @ApiImplicitParam instead of @ApiParam, but example is still missing:

    @ApiImplicitParams({
        @ApiImplicitParam(
            name = &quot;kambiTransaction&quot;,
            value = &quot;A JSON value representing a transaction. An example of the expected schema can be found down here. The fields marked with * means that they are required. See the schema of KambiTransaction for more information.&quot;,
            required = true,
            dataType = &quot;String&quot;,
            paramType = &quot;body&quot;,
            examples = @Example(value = {@ExampleProperty(mediaType = &quot;application/json&quot;, value = &quot;{foo: whatever, bar: whatever2}&quot;)}))})


  [1]: https://i.stack.imgur.com/uw5ZU.png

How can I set a description and an example in Swagger with Swagger annotations?

I&#39;m trying to understand Spring WebFlux. The things I&#39;ve found so far are reactive at the core, no Servlet API, no thread per request, HTTP 2, server pushes, application/stream+json. 

But what is the difference between asynchronous calls in Spring MVC? I mean in Spring MVC when you return Future, DefferedResult and etc you get logic in the request handler (controller method) executed in a separate thread, so you can benefit from saving thread pool resources for dispatching requests as well. 

So could you please highlight differences related to that? Why WebFlux is better here? 

Thank you for your time very much!

Spring MVC (async) vs Spring WebFlux

My JDK 9+181 Spring Boot 2.0.0.BUILD-SNAPSHOT CLI application displays this warning on startup:

    WARNING: An illegal reflective access operation has occurred
    WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (jar:file:/home/jan/src/fm-cli/target/fm-cli-0.1.0-SNAPSHOT.jar!/BOOT-INF/lib/spring-core-5.0.0.RELEASE.jar!/) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
    WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1

This is a console application, so I need to disable this warning -- how can I do that?

**Note:** This question asks the specific question of how to disable this warning triggered by Spring; it is not a duplicate of https://stackoverflow.com/questions/46230413/jdk9-an-illegal-reflective-access-operation-has-occurred-org-python-core-pysys which deals with a similar symptom in a different library.

Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1

I have a `spring-boot` application where my `@SpringBootApplication` starter class looks like a standard one. So I created many tests for all my functionalities and send the summary to [sonarqube][1] to see my coverage. 

For my starter class Sonarqube tells me that I just have 60% coverage. So the average coverage is not good as expected.

[![enter image description here][2]][2]

My Test class is just the default one.

    @RunWith(SpringRunner.class)
    @SpringBootTest(classes = ElectronicGiftcardServiceApplication.class)
    public class ElectronicGiftcardServiceApplicationTests {
    
    	@Test
    	public void contextLoads() {
    	}
    }

So how can I test my main class in the starter class of my application?
  [1]: https://www.sonarqube.org/
  [2]: https://i.stack.imgur.com/VCqsd.png

How to test main class of Spring-boot application

Currently I got the main class:

```java
package com.recweb.springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;


@SpringBootApplication
/*@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})*/
public class SpringbootApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringbootApplication.class, args);
	}
}
```

a members class (id, firstname..), a MemberController class:

```java
package com.recweb.springboot;

import java.util.Arrays;
import java.util.List;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MemberController {
	@GetMapping(&quot;/members&quot;)
    public List&lt;Member&gt; getAllUsers() {
		return Arrays.asList(new Member(1, &quot;amit&quot;));
	}
}
```

and a WebSecurityConfig class:

```java
package com.recweb.springboot;

import org.springframework.context.annotation.Bean;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;

@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Bean
    public UserDetailsService userDetailsService() {
        InMemoryUserDetailsManager manager = new InMemoryUserDetailsManager();
        manager.createUser(User.withUsername(&quot;user&quot;).password(&quot;user&quot;).roles(&quot;USER&quot;).build());
        return manager;
    }
}
```

When i run &quot;http://localhost:8080/members&quot; i get a login page, i enter &quot;user&quot; as user &amp; &quot;user&quot; as password and then i get the hardcoded Member.
It worked fine, but then i right clicked on my project-Run as-Maven install (because i added a dependency, i don&#39;t know if that was necessary, first time with Maven too).
Since then, when i enter &quot;user&quot; &amp; &quot;user&quot; on the login page i get this error:


    java.lang.IllegalArgumentException: There is no PasswordEncoder mapped for the id &quot;null&quot;
    	at org.springframework.security.crypto.password.DelegatingPasswordEncoder$UnmappedIdPasswordEncoder.matches(DelegatingPasswordEncoder.java:233) ~[spring-security-core-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.crypto.password.DelegatingPasswordEncoder.matches(DelegatingPasswordEncoder.java:196) ~[spring-security-core-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.authentication.dao.DaoAuthenticationProvider.additionalAuthenticationChecks(DaoAuthenticationProvider.java:86) ~[spring-security-core-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.authentication.dao.AbstractUserDetailsAuthenticationProvider.authenticate(AbstractUserDetailsAuthenticationProvider.java:166) ~[spring-security-core-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:174) ~[spring-security-core-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:199) ~[spring-security-core-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter.attemptAuthentication(UsernamePasswordAuthenticationFilter.java:94) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:124) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177) ~[spring-security-web-5.0.0.BUILD-SNAPSHOT.jar:5.0.0.BUILD-SNAPSHOT]
    	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
    	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.23.jar:8.5.23]
    	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]

and it stays on the login page.
I tried to remove the dependency &amp; Maven install again, but no luck.
This is my POM:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
    &lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
    	xsi:schemaLocation=&quot;http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd&quot;&gt;
    	&lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
    
    	&lt;groupId&gt;com.recweb&lt;/groupId&gt;
    	&lt;artifactId&gt;springboot&lt;/artifactId&gt;
    	&lt;version&gt;0.0.1-SNAPSHOT&lt;/version&gt;
    	&lt;packaging&gt;jar&lt;/packaging&gt;
    
    	&lt;name&gt;springboot&lt;/name&gt;
    	&lt;description&gt;Demo project for Spring Boot&lt;/description&gt;
    
    	&lt;parent&gt;
    		&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
    		&lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
    		&lt;version&gt;2.0.0.BUILD-SNAPSHOT&lt;/version&gt;
    		&lt;relativePath/&gt; &lt;!-- lookup parent from repository --&gt;
    	&lt;/parent&gt;
    
    	&lt;properties&gt;
    		&lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt;
    		&lt;project.reporting.outputEncoding&gt;UTF-8&lt;/project.reporting.outputEncoding&gt;
    		&lt;java.version&gt;1.8&lt;/java.version&gt;
    	&lt;/properties&gt;
    
    	&lt;dependencies&gt;
    		&lt;dependency&gt;
    			&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
    			&lt;artifactId&gt;spring-boot-starter-data-jpa&lt;/artifactId&gt;
    		&lt;/dependency&gt;
    		&lt;dependency&gt;
    			&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
    			&lt;artifactId&gt;spring-boot-starter-data-rest&lt;/artifactId&gt;
    		&lt;/dependency&gt;
    		&lt;dependency&gt;
    			&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
    			&lt;artifactId&gt;spring-boot-starter-jdbc&lt;/artifactId&gt;
    		&lt;/dependency&gt;
    		&lt;dependency&gt;
    			&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
    			&lt;artifactId&gt;spring-boot-starter-security&lt;/artifactId&gt;
    		&lt;/dependency&gt;
    		&lt;dependency&gt;
    			&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
    			&lt;artifactId&gt;spring-boot-starter-web&lt;/artifactId&gt;
    		&lt;/dependency&gt;
    
    		&lt;dependency&gt;
    			&lt;groupId&gt;com.h2database&lt;/groupId&gt;
    			&lt;artifactId&gt;h2&lt;/artifactId&gt;
    			&lt;scope&gt;runtime&lt;/scope&gt;
    			    &lt;/dependency&gt;
    		&lt;dependency&gt;
    			&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
    			&lt;artifactId&gt;spring-boot-starter-test&lt;/artifactId&gt;
    			&lt;scope&gt;test&lt;/scope&gt;
    		&lt;/dependency&gt;
    		&lt;dependency&gt;
    			&lt;groupId&gt;org.springframework.security&lt;/groupId&gt;
    			&lt;artifactId&gt;spring-security-test&lt;/artifactId&gt;
    			&lt;scope&gt;test&lt;/scope&gt;
    		&lt;/dependency&gt;
    &lt;!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator --&gt;
    &lt;dependency&gt;
        &lt;groupId&gt;org.hibernate&lt;/groupId&gt;
        &lt;artifactId&gt;hibernate-validator&lt;/artifactId&gt;
        &lt;version&gt;5.3.0.Final&lt;/version&gt;
    &lt;/dependency&gt;
    		&lt;dependency&gt;
            &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
            &lt;artifactId&gt;spring-boot-starter-tomcat&lt;/artifactId&gt;
    &lt;!--         &lt;scope&gt;provided&lt;/scope&gt; --&gt;
    &lt;/dependency&gt;
    
    	&lt;/dependencies&gt;
    
    	&lt;build&gt;
    		&lt;plugins&gt;
    			&lt;plugin&gt;
    				&lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
    				&lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt;
    			&lt;/plugin&gt;
    		&lt;/plugins&gt;
    	&lt;/build&gt;
    
    	&lt;repositories&gt;
    		&lt;repository&gt;
    			&lt;id&gt;spring-snapshots&lt;/id&gt;
    			&lt;name&gt;Spring Snapshots&lt;/name&gt;
    			&lt;url&gt;https://repo.spring.io/snapshot&lt;/url&gt;
    			&lt;snapshots&gt;
    				&lt;enabled&gt;true&lt;/enabled&gt;
    			&lt;/snapshots&gt;
    		&lt;/repository&gt;
    		&lt;repository&gt;
    			&lt;id&gt;spring-milestones&lt;/id&gt;
    			&lt;name&gt;Spring Milestones&lt;/name&gt;
    			&lt;url&gt;https://repo.spring.io/milestone&lt;/url&gt;
    			&lt;snapshots&gt;
    				&lt;enabled&gt;false&lt;/enabled&gt;
    			&lt;/snapshots&gt;
    		&lt;/repository&gt;
    	&lt;/repositories&gt;
    
    	&lt;pluginRepositories&gt;
    		&lt;pluginRepository&gt;
    			&lt;id&gt;spring-snapshots&lt;/id&gt;
    			&lt;name&gt;Spring Snapshots&lt;/name&gt;
    			&lt;url&gt;https://repo.spring.io/snapshot&lt;/url&gt;
    			&lt;snapshots&gt;
    				&lt;enabled&gt;true&lt;/enabled&gt;
    			&lt;/snapshots&gt;
    		&lt;/pluginRepository&gt;
    		&lt;pluginRepository&gt;
    			&lt;id&gt;spring-milestones&lt;/id&gt;
    			&lt;name&gt;Spring Milestones&lt;/name&gt;
    			&lt;url&gt;https://repo.spring.io/milestone&lt;/url&gt;
    			&lt;snapshots&gt;
    				&lt;enabled&gt;false&lt;/enabled&gt;
    			&lt;/snapshots&gt;
    		&lt;/pluginRepository&gt;
    	&lt;/pluginRepositories&gt;
    
    
    &lt;/project&gt;


What went wrong?
Thanks

Spring Boot: How to specify the PasswordEncoder?

When creating spring-boot projects by using [start.spring.io][1], some maven wrapper files get included:

 - mvnw
 - mvnw.bat

Should these files be ignored when committing to a git repo? 


  [1]: http://start.spring.io

Should the mvnw files be added to the repository?

I want to use Spring Security for JWT authentication. But it comes with default authentication. I am trying to disable it, but the old approach of doing this - disabling it through `application.properties` - is deprecated in 2.0.

This is what I tried:

    @Configuration
    public class StackWebSecurityConfigurerAdapter extends WebSecurityConfigurerAdapter {
    
        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http.httpBasic().disable();
            // http.authorizeRequests().anyRequest().permitAll(); // Also doesn&#39;t work.
        }
    }

How can I simply disable basic security?

**UPDATE**  
It might be nice to know that I am not using web mvc but web flux.

Screenshot:  
[![Basic login form][1]][1]


  [1]: https://i.stack.imgur.com/s7L3Q.png

Spring Boot 2.0 disable default security

I&#39;m a starter in **Spring Web-Flux**. I wrote a controller as follows: 

    @RestController
    public class FirstController 
    {
        @GetMapping(&quot;/first&quot;)
        public Mono&lt;String&gt; getAllTweets() 
        {
            return Mono.just(&quot;I am First Mono&quot;)
        }
    }

I know one of the reactive benefits is **Backpressure**, and it can balance the request or the response rate. I want to realize how to have backpressure mechanism in **Spring Web-Flux**.

Backpressure mechanism in Spring Web-Flux

I&#39;ve come across Mono.defer() in some Spring webflux code

I looked up the method in the docs but don&#39;t understand the explanation:

&quot;Create a Mono provider that will supply a target Mono to subscribe to 
for each Subscriber downstream&quot;

please could I have an explanation and an example. Is there a place with a bunch of Reactor example code (their unit tests?) that I might reference.

thanks

Content Type	Original Author	Original Content on Stackoverflow
Question	hba	View Question on Stackoverflow
Solution 1 - Java	Christian Bongiorno	View Answer on Stackoverflow

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