我是 OptaPlanner 的新手，目前我对它的 ShadowVariable 注释感到困惑。
下面是我根据 OptaPlanner Quick Start of TimeTable 示例修改的简单 Spring Boot 代码。
我将 Room 创建为 PlanningEntity，并添加了一个名为 Lessons 的字段，并带有 @InverseRelationShadowVariable 注释，但是当我运行这些代码时，它会抛出错误： not a valid PlanningEntity ，我搜索了很多文档但仍然没有解决方案。
@PlanningEntity
public class Lesson {
@PlanningId
private Long id;
private String subject;
private String teacher;
private String studentGroup;
@PlanningVariable
private Timeslot timeslot;
@PlanningVariable
private Room room;
// No-arg constructor required for OptaPlanner
public Lesson() {
}
public Lesson(long id, String subject, String teacher, String studentGroup) {
this.id = id;
this.subject = subject;
this.teacher = teacher;
this.studentGroup = studentGroup;
}
public Lesson(long id, String subject, String teacher, String studentGroup, Timeslot timeslot, Room room) {
this(id, subject, teacher, studentGroup);
this.timeslot = timeslot;
this.room = room;
}
@Override
public String toString() {
return subject + "(" + id + ")";
}
// ************************************************************************
// Getters and setters
// ************************************************************************
public Long getId() {
return id;
}
public String getSubject() {
return subject;
}
public String getTeacher() {
return teacher;
}
public String getStudentGroup() {
return studentGroup;
}
public Timeslot getTimeslot() {
return timeslot;
}
public void setTimeslot(Timeslot timeslot) {
this.timeslot = timeslot;
}
public Room getRoom() {
return room;
}
public void setRoom(Room room) {
this.room = room;
}
}
@PlanningEntity
public class Room {
@PlanningId
private Long id;
private String name;
@InverseRelationShadowVariable(sourceVariableName = "room")
private List<Lesson> lessons = new ArrayList<>();
public Integer getLessonCount() {
log.info("size: {}", lessonList.size());
return this.lessonList.size();
}
public Room() {
}
public Room(String name) {
this.name = name.trim();
}
public Room(long id, String name) {
this(name);
this.id = id;
}
@Override
public String toString() {
return name;
}
// ************************************************************************
// Getters and setters
// ************************************************************************
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name.trim();
}
}
3.时间表.java
@PlanningSolution
public class TimeTable {
@ProblemFactCollectionProperty
@ValueRangeProvider
private List<Timeslot> timeslotList;
@ProblemFactCollectionProperty
@ValueRangeProvider
private List<Room> roomList;
@PlanningEntityCollectionProperty
private List<Lesson> lessonList;
@PlanningScore
private HardSoftScore score;
// No-arg constructor required for OptaPlanner
public TimeTable() {
}
public TimeTable(List<Timeslot> timeslotList, List<Room> roomList, List<Lesson> lessonList) {
this.timeslotList = timeslotList;
this.roomList = roomList;
this.lessonList = lessonList;
}
// ************************************************************************
// Getters and setters
// ************************************************************************
public List<Timeslot> getTimeslotList() {
return timeslotList;
}
public List<Room> getRoomList() {
return roomList;
}
public List<Lesson> getLessonList() {
return lessonList;
}
public HardSoftScore getScore() {
return score;
}
}
4.SolverFactory
SolverFactory<TimeTable> solverFactory = SolverFactory.create(new SolverConfig()
.withSolutionClass(TimeTable.class)
.withEntityClasses(Lesson.class)
.withEntityClasses(Room.class)
.withConstraintProviderClass(TimeTableConstraintProvider.class)
// The solver runs only for 5 seconds on this small dataset.
// It's recommended to run for at least 5 minutes ("5m") otherwise.
.withTerminationSpentLimit(Duration.ofSeconds(1)));
2023-08-06 16:48:08,819 ERROR [http-nio-8090-exec-4] o.a.c.c.C.[.[.[.[dispatcherServlet].log(175): Servlet.service() for servlet [dispatcherServlet] in context with path [/api] threw exception [Request processing failed; nested exception is java.lang.IllegalArgumentException: The entityClass (class com.example.optatest.timeTabling.entity.Room) has an @InverseRelationShadowVariable annotated property (lessons) with a sourceClass (class com.example.optatest.timeTabling.entity.Lesson) which is not a valid planning entity.
Maybe check the annotations of the class (class com.example.optatest.timeTabling.entity.Lesson).
Maybe add the class (class com.example.optatest.timeTabling.entity.Lesson) among planning entities in the solver configuration.] with root cause
java.lang.IllegalArgumentException: The entityClass (class com.example.optatest.timeTabling.entity.Room) has an @InverseRelationShadowVariable annotated property (lessons) with a sourceClass (class com.example.optatest.timeTabling.entity.Lesson) which is not a valid planning entity.
Maybe check the annotations of the class (class com.example.optatest.timeTabling.entity.Lesson).
Maybe add the class (class com.example.optatest.timeTabling.entity.Lesson) among planning entities in the solver configuration.
at org.optaplanner.core.impl.domain.variable.inverserelation.InverseRelationShadowVariableDescriptor.linkShadowSources(InverseRelationShadowVariableDescriptor.java:77) ~[optaplanner-core-impl-9.41.0.Final.jar:9.41.0.Final]
at org.optaplanner.core.impl.domain.variable.inverserelation.InverseRelationShadowVariableDescriptor.linkVariableDescriptors(InverseRelationShadowVariableDescriptor.java:47) ~[optaplanner-core-impl-9.41.0.Final.jar:9.41.0.Final]
at org.optaplanner.core.impl.domain.entity.descriptor.EntityDescriptor.linkVariableDescriptors(EntityDescriptor.java:413) ~[optaplanner-core-impl-9.41.0.Final.jar:9.41.0.Final]
at org.optaplanner.core.impl.domain.solution.descriptor.SolutionDescriptor.afterAnnotationsProcessed(SolutionDescriptor.java:482) ~[optaplanner-core-impl-9.41.0.Final.jar:9.41.0.Final]
at org.optaplanner.core.impl.domain.solution.descriptor.SolutionDescriptor.buildSolutionDescriptor(SolutionDescriptor.java:108) ~[optaplanner-core-impl-9.41.0.Final.jar:9.41.0.Final]
at org.optaplanner.core.impl.solver.DefaultSolverFactory.buildSolutionDescriptor(DefaultSolverFactory.java:147) ~[optaplanner-core-impl-9.41.0.Final.jar:9.41.0.Final]
at org.optaplanner.core.impl.solver.DefaultSolverFactory.<init>(DefaultSolverFactory.java:69) ~[optaplanner-core-impl-9.41.0.Final.jar:9.41.0.Final]
at org.optaplanner.core.api.solver.SolverFactory.create(SolverFactory.java:106) ~[optaplanner-core-impl-9.41.0.Final.jar:9.41.0.Final]
at com.example.optatest.controller.Test04Controller.test04(Test04Controller.java:27) ~[classes/:?]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.16.jar:5.3.16]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.16.jar:5.3.16]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.58.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.16.jar:5.3.16]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.58.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.16.jar:5.3.16]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.16.jar:5.3.16]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.16.jar:5.3.16]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.16.jar:5.3.16]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.16.jar:5.3.16]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.16.jar:5.3.16]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1735) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.58.jar:9.0.58]
at java.lang.Thread.run(Thread.java:829) [?:?]
请支持：我该怎么做才能让现场课程按照Lesson.java的现场室进行更改？非常感谢。
感谢 OptaPlanner 开发部门的 Anna Dupliak。
我的问题的答案是将 Room.class 和 Lesson.class 添加到 .withEntityClasses(Lesson.class, Room.class) 中。
配置如下：
SolverFactory<TimeTable> solverFactory = SolverFactory.create(new SolverConfig()
.withSolutionClass(TimeTable.class)
.withEntityClasses(Lesson.class, Room.class)
.withConstraintProviderClass(TimeTableConstraintProvider.class)
.withTerminationSpentLimit(Duration.ofSeconds(1)));