spring boot jpa trying to model an existing database - jpa

Question

I have a database that I'm trying to model. There are 3 tables, table cycles with a one to many to table cyclesensors and a one to many to table sensors. I'm trying to get the latest cycle data and this is the query that I found to work:
Select c.id, cs.cycles, s.* from BizWareUser.Sensor s Inner Join BizWareUser.cyclesensor cs on s.SensorDataCol = cs.id
Inner Join BizWareUser.cycles c on c.id = cs.cycles
Where c.id IN (Select max(id) from BizWareUser.cycles cs)
When I use it in hql, I receive this error:
Could not write JSON: HHH000142:
I would like to have the data modeled in such a way for react to parse it properly:
cycles{
cyclesensors : [
cyclesensor:{
sensors : [
sensor : {
}
]
}
]
}
I'm very new to spring boot but I was hoping to do this without a explicitly writing the query. Below are my models:
Cycles:
#Entity
#Data
#Table(name="cycles", catalog="bizware_asp_test", schema="BizWareUser")
public class Cycles {
#Id
#GeneratedValue(strategy= GenerationType.AUTO)
#Column(name="id")
private Long id;
#Column(name="event_time")
private Timestamp event_time;
#Column(name="recipe")
private Short recipe;
#Column(name="cycle_duration")
private Short cycle_duration;
#Column(name="gondola")
private Short gondola;
#Column(name="part_index")
private Short part_index;
#Column(name="part_name")
private String part_name;
#Column(name="shift_count")
private Short shift_count;
#Column(name="pour_time")
private Short pour_time;
#Column(name="shift2")
private String shift2;
#Column(name="iron_temp")
private Short iron_temp;
#Column(name="alarm")
private Integer alarm;
#Column(name="pour_weight")
private Short pour_weight;
#Column(name="target_weight")
private Short target_weight;
#Column(name="pour_operator_id")
private String pour_operator_id;
#Column(name="cluster_weight")
private Short cluster_weight;
#Column(name="furnace")
private Character furnace;
#Column(name="heat")
private Character heat;
#Column(name="tap")
private Character tap;
#Column(name="recipe_A")
private Short recipe_A;
#Column(name="recipe_B")
private Short recipe_B;
#Column(name="partname_A")
private String partname_A;
#Column(name="partname_B")
private String partname_B;
#Column(name="fadetime")
private Integer fadetime;
#OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "cycles")
#JsonManagedReference
private Set<CycleSensor> cycleSensors = new HashSet<>();
CycleSensor:
#Entity
#Data
#Table(name="cyclesensor", catalog="bizware_asp_test", schema="BizWareUser")
public class CycleSensor {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="id")
private Integer Id;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "cycles", nullable = false)
#JsonBackReference
private Cycles cycles;
#Column(name="compactor")
private String compactor;
#OneToMany
#JoinColumn(name="Id")
private Set<Sensor> sensors;
private CycleSensor(){}
Sensor:
#Entity
#Data
#Table(name="Sensor", catalog="bizware_asp_test", schema="BizWareUser")
public class Sensor {
#Id
#GeneratedValue(strategy= GenerationType.AUTO)
#Column(name="Id")
private Integer Id;
#Column(name="Channel")
private Integer Channel;
#Column(name="DateTime")
private Timestamp DateTime;
#Column(name="Unit")
private String Unit;
#Column(name="Peak")
private Float Peak;
#Column(name="Phase")
private Float Phase;
#Column(name="Amplitude")
private Float Amplitude;
#ManyToOne
#JoinColumn(name="SensorDataCol")
private CycleSensor CycleSensor;
CycleRepository:
#Repository
public interface CyclesRepository extends CrudRepository<Cycles, Long> {
#Query("Select s, cs, c from Sensor s Join s.CycleSensor as cs Join cs.cycles as c Where c.id IN (Select max(id) from Cycles)")
List<Cycles> findTop1ByOrderByIdDesc();
}
SensorRepository:
#Repository
public interface SensorRepository extends CrudRepository<Sensor, Long> {
#Query("Select s, cs, c from Sensor s Join s.CycleSensor as cs Join cs.cycles as c Where c.id IN (Select max(id) from Cycles)")
List<Sensor> findTop1ByOrderByIdDesc();
}
When I access from the cycles controller, I receive this:
java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to
muellerspring.compactionsystemmonitor.Cycles at
muellerspring.compactionsystemmonitor.CyclesController.index(CyclesController.java:16)
~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method) ~[na:1.8.0_151] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
~[na:1.8.0_151] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[na:1.8.0_151] at java.lang.reflect.Method.invoke(Method.java:498)
~[na:1.8.0_151] at
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
~[tomcat-embed-core-8.5.23.jar:8.5.23] at
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
~[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
~[tomcat-embed-core-8.5.23.jar:8.5.23] at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
~[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.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
~[tomcat-embed-websocket-8.5.23.jar:8.5.23] 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-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
~[spring-web-4.3.13.RELEASE.jar:4.3.13.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-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
~[spring-web-4.3.13.RELEASE.jar:4.3.13.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-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
~[spring-web-4.3.13.RELEASE.jar:4.3.13.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:197)
~[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
~[spring-web-4.3.13.RELEASE.jar:4.3.13.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:1149)
[na:1.8.0_151] at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[na:1.8.0_151] at
org.apache.tomcat.util.threads.TaskThread$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_151]
When I run from the sensors controller, I get this.
Could not write JSON: HHH000142: Javassist Enhancement failed:
muellerspring.compactionsystemmonitor.Cycles; nested exception is
com.fasterxml.jackson.databind.JsonMappingException: HHH000142:
Javassist Enhancement failed:
muellerspring.compactionsystemmonitor.Cycles (through reference chain:
java.util.ArrayList[0]->muellerspring.compactionsystemmonitor.Sensor["cycleSensor"]->muellerspring.compactionsystemmonitor.CycleSensor["sensors"])
CyclesController
#RestController
public class CyclesController {
#Autowired
private CyclesRepository cyclesRepository;
#RequestMapping(value="/cycles", method=RequestMethod.GET)
public Cycles index(){
List<Cycles> cycles = cyclesRepository.findTop1ByOrderByIdDesc();
return cycles.get(0);
}
#RequestMapping(value="/cycles/count", method=RequestMethod.GET)
public Long Count(){
return cyclesRepository.count();
}
}
Sensor Controller:
#RestController
public class SensorController {
#Autowired
private SensorRepository sensorRepository;
#RequestMapping(value="/sensors", method=RequestMethod.GET)
public List<Sensor> index(){
List<Sensor> sensors = sensorRepository.findTop1ByOrderByIdDesc();
return sensors;
}
}