Develop Reference

How to implement a REST service with Spring Boot

I want to build a simple microservice with "Spring Boot" with IntelliJ IDE.
One method of this microservice should to accept in input a List and a Double Value.
So I'm building this code:
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
#RestController
public class ECGController {
private double v1 = 0.01;
private double v2 = 0.01;
private int il = 0;
private static final double step = 0.0025;
#PostMapping("/clearF3A")
public List<Double> clearF3A(ArrayList<Integer> RRin, Double CR){
try{
}catch(Exception e){
}
}
In postman I'm try to execute this:
{
"RRin":[
834,
490,
878,
807,
517,
849,
816,
520,
632,
488,
701,
536,
675
],
"CR":2.0
}
but if I try to execute this request, I can display this message error:
java.lang.NullPointerException
at com.eresult.cleanECG.com.cleanECG.controller.ECGController.clearF3A(ECGController.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
java.lang.NullPointerException

Your request is bad.
Instead of providing ArrayList<Integer> RRin, Double CR to clearF3A function, you should have one object that represents whole post body (whole JSON document). That is the rule. In your case, your passed object should have two parameters, one is rrin array, and second one should be cr. Also, that parameter should be annotated with #RequestBody
Roughly, this is what you need to have:
#PostMapping("/clearF3A")
public List<Double> clearF3A(#RequestBody ClearF3ARequest){
...
}
class ClearF3ARequest {
private ArrayList<Integer> RRin;
private Double CR;
}
Hope this helps.

Create a new object to represent your JSON structure. For example:
public class EcgInput {
#JsonProperty("RRin")
private List<Integer> rrIn;
#JsonProperty("CR")
private Double cr;
//todo: add the getters and setters and methods like toString()
}
public class EcgOutput {
#JsonProperty("output")
private List<Double> output;
//todo: add the getters and setters and methods like toString()
}
Then in your controller change your method to something like:
#PostMapping("/clearF3A")
public ResponseEntity<EcgOutput> clearF3A(#RequestBody EcgInput ecgInput) {
//todo: your logic
EcgOutput output = new EcgOutput();
//todo: put your result inside it
return new ResponseEntity<>(output, HttpStatus.OK);
}
Jackson will translate JSON to those objects, and vice-versa for you.

Error 500 using EntityManager in PostRequest

FINAL EDIT: Sorry I'm sure this post is very hard to follow, I'm updating it for future posterity. I never figured out what is the issue with my #PersistenceContext annotation, I ended up giving up and just moved on to using a CrudRepository instead.
our repository interface that implements from CrudRepository:
public interface RepositoryCar extends CrudRepository<Car, Long> {
}
Make a service Interface (not necessary but it's better practice):
public interface ServiceInterface {
Car addCar(Car car);
Car findCar(long carId);
}
make the implementing subclass #Service:
#Service
#Transactional
public class ServiceCar implements ServiceInterface{
//autowire this so it can instantiate your CrudRepository class.
#Autowired
RepositoryCar repositoryCar;
public Car addCar(Car car) {
return repositoryCar.save(car);
}
public Car findCar(long carId) {
Optional<Car> present=repositoryCar.findById(carId);
if(present.isPresent())
{
return present.get();
}
else
return null;
}
}
So that's my cluster of a post, I'm still curious as to why my #PersistenceContext wasn't picked up on somehow, but all my endpoints were setup correctly, I would still love to hear an explanation. I just moved on and used a CrudRepository though, there are multiple ways to do this.
Original post below:
I am trying to make a PostRequest and store information about my Car object using Spring Boot. I was following a guide where I have done this previously and it worked, so I'm trying to refollow that guide and my prior example, but I seem to be missing something. I get a generic error 500, and I'm not sure where to go from here.
my Car class:
#Entity
#Table(name = "cars")
public class Car {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
private String make;
private String model;
private String color;
private int year;
public Car(String make, String model, String color, int year) {
this.make = make;
this.model = model;
this.color = color;
this.year = year;
}
//getters and setters
My CarController class:
#RestController
#RequestMapping("/cars")
public class CarsController {
CarsRepository repository;
public CarsController(CarsRepository repository) {
this.repository = repository;
}
#PostMapping
public Car addCar(#RequestBody Car car) {
repository.addCar(car);
return car;
}
#GetMapping
public CarsRepository getCars() {
return repository;
}
}
My Car Repository:
#Repository
public class CarsRepository {
#PersistenceContext
EntityManager entityManager;
#Transactional
public void addCar(Car car) {
entityManager.persist(car);
}
public Car find(Long id) {
return entityManager.find(Car.class, id);
}
}
My Application.yml:
spring:
jpa:
generate-ddl: true
properties.hibernate.dialect: org.hibernate.dialect.MySQL5InnoDBDialect
datasource:
url: jdbc:mysql://localhost:3306/cars?useSSL=false
username: root
In my prior examples that work, I have used this same application.yml, and I double checked that I do not have a password set, so I have omitted that field.
I made a database and table. The following SQL code makes the table. Making the table in unnecessary as the table is automatically generated, I dropped the table and just had the database exist at the end of all this:
CREATE TABLE car (
id BIGINT(20) NOT NULL AUTO_INCREMENT,
make VARCHAR(20),
model VARCHAR(20),
color VARCHAR(20),
year INT,
PRIMARY KEY (id)
)
ENGINE = innodb
DEFAULT CHARSET = utf8;
My main SpringBootApplication class is very straightforward:
package study.example;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
I was wondering if my table was set up incorrectly somehow, so I copy pasted my prior working example and it too gave me an error 500, so I do not think my table is incorrect because I'm certain my prior table for a different Application works.
When I do my post request in PostMan, I always get back an error 500, so I changed it from EntityManger to just an in memory HashMap, and it works fine, so I'm certain it's the EntityManager that is the problem.
Is there some component that I'm missing here, or is something I've done wrong? I have spent far too much time on this, but it looks like I'm following my past example identically, but obviously not.
My post request:
{
"make" : "make",
"model" : "model",
"color" : "blue",
"year" : 2000
}
and the response is pretty useless, it just says
{
"timestamp": "2019-06-29T03:29:06.110+0000",
"status": 500,
"error": "Internal Server Error",
"message": "No message available",
"path": "/cars/"
}
Thank you for any help, it's greatly appreciated.
EDIT: I now realize I am actually getting some useful error message in the logs, as Dmitriy pointed out. I am getting a NullPointer Exception. Here is the entire stacktrace:
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
java.lang.NullPointerException: null
at study.example.CarsRepository.addCar(CarsRepository.java:19) ~[main/:na]
at study.example.CarsController.addCar(CarsController.java:23) ~[main/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_211]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_211]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_211]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_211]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:891) ~[spring-webmvc-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) ~[spring-webmvc-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) ~[spring-webmvc-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974) ~[spring-webmvc-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877) ~[spring-webmvc-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851) ~[spring-webmvc-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.34.jar:8.5.34]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:685) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498) [tomcat-embed-core-8.5.34.jar:8.5.34]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.34.jar:8.5.34]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_211]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_211]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.34.jar:8.5.34]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_211]
EDIT: I'm pretty sure it's my build.gradle that is the problem, because I don't see what else it could be. I'm surprised that it even compiles if that's the problem to be honest, but here it is anyways:
buildscript {
ext {
springBootVersion = "2.0.6.RELEASE"
springVersion = "5.0.10.RELEASE"
hibernateVersion = "5.2.17.Final"
slf4jVersion = "1.7.25"
junitVersion = "4.12"
mysqlVersion = "5.1.40"
}
repositories {
mavenCentral()
}
dependencies {
classpath "org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion"
}
}
apply plugin: 'java'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
repositories {
mavenCentral()
}
dependencies {
compile("org.springframework.boot:spring-boot-starter-web:$springBootVersion")
compile "com.fasterxml.jackson.dataformat:jackson-dataformat-csv:2.7.0"
compile("mysql:mysql-connector-java:6.0.6")
compile "org.springframework.boot:spring-boot-starter-tomcat"
compile "org.hibernate:hibernate-core:$hibernateVersion"
compile "org.slf4j:slf4j-api:$slf4jVersion"
testCompile("org.springframework.boot:spring-boot-starter-test:$springBootVersion")
}
springBoot {
buildInfo()
}
bootRun.environment([
"WELCOME_MESSAGE": "hello"
])

In your code for the class CarsRepository.java , you have provided the annotation #Transactional on the method .Try using it like below :
#Repository
#Transactional
public class CarsRepository {
#PersistenceContext
EntityManager entityManager;
public void addCar(Car car) {
entityManager.persist(car);
}
public Car find(Long id) {
return entityManager.find(Car.class, id);
}
}
#PersistenceContext: A persistence context handles a set of entities
which hold data to be persisted in some persistence store (e.g. a
database). In particular, the context is aware of the different states
an entity can have (e.g. managed, detached) in relation to both the
context and the underlying persistence store.

How to fix Null-Pointer exeption by RapidClipse auto generated code

With RapidClipse I build a page with three elements. A drop-down field, a XdevTable and a XDevfieldGroup.
The drop-down field is filled by database table content (works fine)
The table should be filled after selecting a value out of drop-down field (works fine)
After selecting a value out of the XDevTable the related row should be editable by the fieldgroup.
After selecting a row in the table I get a null-pointer exeption:
Mai 27, 2019 4:41:19 PM com.vaadin.server.DefaultErrorHandler doDefault
SCHWERWIEGEND:
java.lang.NullPointerException
at
com.xdev.ui.entitycomponent.table.AbstractBeanTable.getSelectedItem(AbstractBeanTable.java:180)
at com.xdev.ui.masterdetail.FieldGroupMasterDetailConnection.lambda$0(FieldGroupMasterDetailConnection.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:200)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:163)
at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1015)
at com.vaadin.ui.AbstractField.fireValueChange(AbstractField.java:1161)
at com.vaadin.ui.AbstractField.setValue(AbstractField.java:571)
at com.vaadin.ui.AbstractSelect.setValue(AbstractSelect.java:735)
at com.vaadin.ui.AbstractField.setValue(AbstractField.java:468)
at com.vaadin.ui.AbstractSelect.changeVariables(AbstractSelect.java:547)
at com.vaadin.ui.Table.changeVariables(Table.java:2933)
at com.vaadin.server.communication.ServerRpcHandler.changeVariables(ServerRpcHandler.java:616)
at com.vaadin.server.communication.ServerRpcHandler.handleInvocation(ServerRpcHandler.java:463)
at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:406)
at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:273)
at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:90)
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:41)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1435)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:380)
at com.xdev.communication.XdevServlet.service(XdevServlet.java:212)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:660)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:808)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
If I am right, I assume, that there is a leak identifying the item which is selected in the table. But I still did what/how is described in RapidClipse Training. So the connection between table and fieldgroup is done by the property "ConnectedForm" inside the table.
The connection from drop-down field to table is done by following code:
private void comboBox_valueChange(final Property.ValueChangeEvent event) {
try {
Integer varMainClass = 0;
varMainClass = this.comboBox.getSelectedItem().getBean().getId();
Notification.show("Kuck a mole: ", this.comboBox.getSelectedItem().getBean().getGroupName()
, Notification.Type.ERROR_MESSAGE);
final BeanItemContainer<TGroup> mySubClasses = new BeanItemContainer<>(TGroup.class);
mySubClasses.addAll(new TGroupDAO().getAllSubClassByMainClassId(varMainClass));
this.table.setContainerDataSource(mySubClasses);
this.table.setVisibleColumns("id", "groupName");
this.table.setVisible(true);
} catch (final Exception e) {
e.printStackTrace();
final String stackTrace = Throwables.getStackTraceAsString(e);
this.textAreaErr.setValue(stackTrace);
this.textAreaErr.setVisible(true);
Notification.show("Do isch was falsch, Nachricht: ", e.getMessage(), Notification.Type.ERROR_MESSAGE);
}
}
In table event valueChange are just a notification for testing purpose:
private void table_valueChange(final Property.ValueChangeEvent event) {
Notification.show("Kuck a mole: ", this.table.getSelectedItem().getBean().getGroupName()
, Notification.Type.ERROR_MESSAGE);
}
All help would be appreciated
Thanks in advance

I am happy, because I found a solution with a help of my friend!
It was still my fault (as expected :-) ). I used the wrong container type:
I used:
final BeanItemContainer<TGroup> mySubClasses = new BeanItemContainer<>(TGroup.class);
But it was the wrong container!
I should use instead:
final XdevBeanItemContainer<TGroup> mySubClasses = new XdevBeanItemContainer<>(TGroup.class);
After I changed it, everything worked fine.
I also searched in the documentation for a hint how I could prevent this for future, but without success.

Autowired variable's method is null [duplicate]

This question already has answers here:
Why is my Spring #Autowired field null?
(21 answers)
Closed 4 years ago.
I have the following REST controller:
#RestController
#RequestMapping("/api/v1/slices")
public class SlicesControllerImpl implements SlicesController {
private static final org.edgexfoundry.support.logging.client.EdgeXLogger logger =
org.edgexfoundry.support.logging.client.EdgeXLoggerFactory
.getEdgeXLogger(SlicesControllerImpl.class);
#RequestMapping(method = RequestMethod.POST)
#Override
public void addSlice() {
logger.info("Mediator received request to add slice.");
Operations operations = new Operations();
operations.getMetadata();
}
}
Class Operations is:
#Service
public class Operations {
#Autowired
private DeviceClient deviceClient;
public void getMetadata() {
List<Device> devices = deviceClient.devices();
System.out.println("Devices received: " + devices);
}
}
where for DeviceClient I have added the following dependency in my pom.xml:
<core-metadata-client.version>0.5.0-SNAPSHOT</core-metadata-client.version>
...
<dependency>
<groupId>org.edgexfoundry</groupId>
<artifactId>core-metadata-client</artifactId>
<version>${core-metadata-client.version}</version>
</dependency>
When I hit the, I get the following error:
...
...
[2019-02-07 12:11:46.788] boot - 1 INFO [http-nio-5252-exec-2] --- SlicesControllerImpl: Mediator received request to add slice.
[2019-02-07 12:11:46.807] boot - 1 ERROR [http-nio-5252-exec-2] --- [dispatcherServlet]: Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
java.lang.NullPointerException
at org.edgexfoundry.mediatorLogic.Operations.getMetadata(Operations.java:80)
at org.edgexfoundry.controller.impl.SlicesControllerImpl.addSlice(SlicesControllerImpl.java:66)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:832)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:743)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:961)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:87)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Any ideas why the variable DeviceClient cannot be autowired and its method is null?

Isn't it because of Operations operations = new Operations();? You make new instance of Operations so private DeviceClient deviceClient; is null because it's outside Spring context. I guess.
You should #Autowired Operations too in SlicesControllerImpl

In your SlicesControllerImpl, do not instantiate Operation as below,
Operations operations = new Operations();
Instead use like below,
#Autowired
Operations operations;
Then call operations.getMetadata();

logger.info("Mediator received request to add slice.");
Operations operations = new Operations();
operations.getMetadata();
You are creating a new instance of the Operations class outside of the Spring Container. It has no idea of that instance.
#RestController
#RequestMapping("/api/v1/slices")
public class SlicesControllerImpl implements SlicesController {
private static final org.edgexfoundry.support.logging.client.EdgeXLogger logger = org.edgexfoundry.support.logging.client.EdgeXLoggerFactory
.getEdgeXLogger(SlicesControllerImpl.class);
private final Operations operations;
public SlicesControllerImpl(Operations operations) {
this.operations = operations;
}
#RequestMapping(method = RequestMethod.POST)
#Override
public void addSlice() {
logger.info("Mediator received request to add slice.");
operations.getMetadata();
}
}
Singular constructors are automatically attempted for autowiring since Spring 4.x

Spark: Streaming DataFrame

I wrote a SpringBoot App that can run as Spark Submit job (Never ending job) giving me an endpoint that I can use to get data from SQLContext. I need to stream data as I get from dataframe. I do the following.
Spring Configuration Class
#Configuration
public class SparkConfiguration {
#Bean
public SparkConf sparkConf(){
return new SparkConf().setAppName("TestApp").setMaster("local[*]");
}
#Bean
public JavaSparkContext sparkContext(final SparkConf sparkConf){
return new JavaSparkContext(sparkConf);
}
#Bean
public SQLContext sqlContext(final JavaSparkContext javaSparkContext){
return new SQLContext(javaSparkContext);
}
Rest Controller Class
#RestController
#RequestMapping("/api")
public class TestResource {
#Autowired
private SQLContext sqlContext;
#GetMapping
#ResponseBody
public void test(HttpServletResponse httpServletResponse) throws
IOException {
DataFrame dataFrame =
sqlContext.sql("SELECT * from TABLE_1").toDF();
PrintWriter writer = httpServletResponse.getWriter();
dataFrame.collectAsList().forEach(row -> {
System.out.println(row);
writer.write(String.valueOf(row.get(0)));
writer.flush();
});
}
}
This works fine!!
But this is not really streaming data.
The moment I do, the below.
dataFrame.collectAsList()
The data get accumulated and then I loop.
Let's say the data is huge (in millions), So I tried to get to the "Row" and push data to writer.
Like this:
#GetMapping
#ResponseBody
public void test(HttpServletResponse httpServletResponse) throws IOException {
DataFrame dataFrame = sqlContext.sql("SELECT * from TABLE_1").toDF();
PrintWriter writer = httpServletResponse.getWriter();
dataFrame.javaRDD().map(new Function<Row, Object>() {
#Override
public Object call(Row row) throws Exception {
writer.write(String.valueOf(row.get(0)));
writer.flush();
return null;
}
}).collect();
}
I get Error:
INFO SparkContext - Created broadcast 9 from javaRDD at TestResource.java:38
ERROR [dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.apache.spark.SparkException: Task not serializable] with root cause
java.io.NotSerializableException: com.example.TestResource
Serialization stack:
- object not serializable (class: com.example.TestResource, value: com.example.TestResource#1a8de8c7)
- field (class: com.example.TestResource$1, name: this$0, type: class com.example.TestResource)
- object (class com.example.TestResource$1, com.example.TestResource$1#4a0dd65b)
- field (class: org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, name: fun$1, type: interface org.apache.spark.api.java.function.Function)
- object (class org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, )
at org.apache.spark.serializer.SerializationDebugger$.improveException(SerializationDebugger.scala:40)
at org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:47)
at org.apache.spark.serializer.JavaSerializerInstance.serialize(JavaSerializer.scala:101)
at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:301)
at org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ClosureCleaner$$clean(ClosureCleaner.scala:294)
at org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner.scala:122)
at org.apache.spark.SparkContext.clean(SparkContext.scala:2066)
at org.apache.spark.rdd.RDD$$anonfun$map$1.apply(RDD.scala:324)
at org.apache.spark.rdd.RDD$$anonfun$map$1.apply(RDD.scala:323)
at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:150)
at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:111)
at org.apache.spark.rdd.RDD.withScope(RDD.scala:316)
at org.apache.spark.rdd.RDD.map(RDD.scala:323)
at org.apache.spark.api.java.JavaRDDLike$class.map(JavaRDDLike.scala:96)
at org.apache.spark.api.java.AbstractJavaRDDLike.map(JavaRDDLike.scala:46)
at com.example.TestResource.test(TestResource.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Any Suggestions, welcome.
Thanks