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Ich habe einen Fehler mit Spring Data Rest und Spring Elasticsearch in einer Spring Boot-Anwendung.Spring Data Elasticsearch: java.lang.ClassCastException: java.lang.Long kann nicht in java.lang.String umgewandelt werden
Dies sind die Bestandteile meiner einfaches Projekt:
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>test</groupId> <artifactId>spring.elasticsearch</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <name>Template per webapp</name> <url>http://localhost:8181</url> <properties> <spring.boot.version>1.4.0.RELEASE</spring.boot.version> <com.h2database.version>1.4.192</com.h2database.version> <com.sun.jna.version>3.0.9</com.sun.jna.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot</artifactId> <version>${spring.boot.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> <version>${spring.boot.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>${spring.boot.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-rest</artifactId> <version>${spring.boot.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> <version>${spring.boot.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-elasticsearch</artifactId> <version>${spring.boot.version}</version> </dependency> <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> <version>${com.h2database.version}</version> </dependency> <dependency> <groupId>com.sun.jna</groupId> <artifactId>jna</artifactId> <version>${com.sun.jna.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.dataformat</groupId> <artifactId>jackson-dataformat-smile</artifactId> <version>2.8.1</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.0</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-eclipse-plugin</artifactId> <version>2.7</version> <configuration> <downloadSources>true</downloadSources> <downloadJavadocs>false</downloadJavadocs> <wtpversion>2.0</wtpversion> <additionalBuildcommands> <buildCommand> <name>org.springframework.ide.eclipse.core.springbuilder</name> </buildCommand> </additionalBuildcommands> <additionalProjectnatures> <projectnature>org.springframework.ide.eclipse.core.springnature</projectnature> </additionalProjectnatures> </configuration> </plugin> </plugins> </build> </project>Frühlings-Boot-Anwendung
@SpringBootApplication public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }Java-Konfiguration
@Configuration @EnableJpaRepositories @EnableElasticsearchRepositories public class ElasticSearchConfig { }Frühling Dateneinheit
@Entity @Document(indexName = "computerindex") public class Computer { @Id @GeneratedValue(strategy = GenerationType.AUTO) private long id; @Field private String name; @Field private String brand; /** getters and setters **/ }Repository
@RepositoryRestResource(exported=true) public interface ComputerRepository extends ElasticsearchRepository<Computer, String>{ }
Die Anwendung mit Erfolg ohne Fehler gestartet.
Dies ist die Struktur der automatisch generierte Indizes:
data
elasticsearch
nodes
0
_state
indices
computerindex
_state
0
_state
index
translog
1
2
3
4
node.lock
Wenn ich auf die URL gehen http://localhost:8080/ Ich habe diese erwartete Antwort:
{
"_links" : {
"computers" : {
"href" : "http://localhost:8080/computers{?page,size,sort}",
"templated" : true
},
"profile" : {
"href" : "http://localhost:8080/profile"
}
}
}
Wenn ich versuche, einen HTTP-POST an die machen url http://localhost:8080/computers mit content-type "application/json" und mit diesem Eingang:
{
"name" : "pc",
"brand" : "brand"
}
Ich habe diesen Fehler:
2016-08-04 09:34:41.245 ERROR 6884 --- [nio-8080-exec-3] o.s.d.r.w.RepositoryRestExceptionHandler : java.lang.Long cannot be cast to java.lang.String
java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.String
at org.springframework.data.elasticsearch.repository.support.SimpleElasticsearchRepository.stringIdRepresentation(SimpleElasticsearchRepository.java:28) ~[spring-data-elasticsearch-2.0.2.RELEASE.jar:na]
at org.springframework.data.elasticsearch.repository.support.AbstractElasticsearchRepository.createIndexQuery(AbstractElasticsearchRepository.java:255) ~[spring-data-elasticsearch-2.0.2.RELEASE.jar:na]
at org.springframework.data.elasticsearch.repository.support.AbstractElasticsearchRepository.save(AbstractElasticsearchRepository.java:142) ~[spring-data-elasticsearch-2.0.2.RELEASE.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_65]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_65]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_65]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_65]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:503) ~[spring-data-commons-1.12.2.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:488) ~[spring-data-commons-1.12.2.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:460) ~[spring-data-commons-1.12.2.RELEASE.jar:na]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61) ~[spring-data-commons-1.12.2.RELEASE.jar:na]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) ~[spring-aop-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at com.sun.proxy.$Proxy92.save(Unknown Source) ~[na:na]
at org.springframework.data.repository.support.CrudRepositoryInvoker.invokeSave(CrudRepositoryInvoker.java:100) ~[spring-data-commons-1.12.2.RELEASE.jar:na]
at org.springframework.data.rest.core.support.UnwrappingRepositoryInvokerFactory$UnwrappingRepositoryInvoker.invokeSave(UnwrappingRepositoryInvokerFactory.java:222) ~[spring-data-rest-core-2.5.2.RELEASE.jar:na]
at org.springframework.data.rest.webmvc.RepositoryEntityController.createAndReturn(RepositoryEntityController.java:501) ~[spring-data-rest-webmvc-2.5.2.RELEASE.jar:na]
at org.springframework.data.rest.webmvc.RepositoryEntityController.postCollectionResource(RepositoryEntityController.java:275) ~[spring-data-rest-webmvc-2.5.2.RELEASE.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_65]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_65]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_65]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_65]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) ~[spring-web-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114) ~[spring-webmvc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) ~[spring-webmvc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) ~[spring-webmvc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) [spring-webmvc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.4.jar:8.5.4]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:87) [spring-web-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) [spring-web-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.2.RELEASE.jar:4.3.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:522) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1110) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425) [tomcat-embed-core-8.5.4.jar:8.5.4]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.4.jar:8.5.4]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_65]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.4.jar:8.5.4]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_65]
Ich nehme an, dass der Fehler das @Id Feld beinhaltet, weil es das einzige Feld mit einem long Typ ist.
Was ist der Grund für diesen Fehler? Wie kann ich tun, um es zu lösen?
Danke.
UPDATE
Ich schließe nicht aus, dass es ein Fehler sein kann.
Dies ist die "stringIdRepresentation" Methodendeklaration in den AbstracElasticsearchRepository:
protected abstract String stringIdRepresentation(ID id);
Und das ist die Umsetzung in der Klasse SimpleElasticsearchRepository:
@Override
protected String stringIdRepresentation(String id) {
return id;
}
Mit dieser Implementierung erwartet, dass die Klasse ein String als ID standardmäßig, ohne vorher eine Konvertierung durchzuführen.