java - 具有生成 com.sun.jersey.spi.inject.Errors 的复合(两部分)主键的 Glassfish/PostgreSQL 表

Question

我有一个 PostgreSQL 表 testtable，它有一个两部分主键(ID1 类型为 bigint，ID2 类型为 bigint)和一个非- 带有时间戳的关键字段。我正在尝试使用“来自数据库的新 RESTful Web 服务”向导生成一个 RESTful web 服务，除了包名称(服务)之外，为所有值选择默认值。该向导生成四个文件:

• AbstractFacade.java
• 测试表.java
• 测试表REST.java
• 测试表PK.java

部署到服务器，并选择“测试 RESTful Web 服务”，测试页面加载失败:

exception 
javax.servlet.ServletException: PWC1391: Servlet.init() for servlet org.netbeans.rest.application.config.ApplicationConfig threw exception

root cause 
com.sun.jersey.spi.inject.Errors$ErrorMessagesException

查看glassfish事件日志，有两个严重的错误:

The following errors and warnings have been detected with resource and/or provider classes:
SEVERE: Missing dependency for method public void service.TesttableFacadeREST.remove(service.TesttablePK) at parameter at index 0
SEVERE: Method, public void service.TesttableFacadeREST.remove(service.TesttablePK), annotated with DELETE of resource, class service.TesttableFacadeREST, is not recognized as valid resource method.
SEVERE: Missing dependency for method public service.Testtable service.TesttableFacadeREST.find(service.TesttablePK) at parameter at index 0
SEVERE: Method, public service.Testtable service.TesttableFacadeREST.find(service.TesttablePK), annotated with GET of resource, class service.TesttableFacadeREST, is not recognized as valid resource method. 

和

WebModule[/tabletest]StandardWrapper.Throwable com.sun.jersey.spi.inject.Errors$ErrorMessagesException
    at com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170)
    at com.sun.jersey.spi.inject.Errors.postProcess(Errors.java:136)
    at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:199)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:771)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:766)
    at com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:488)
    at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:318)
    at com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:609)
    at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:210)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:373)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:556)
    at javax.servlet.GenericServlet.init(GenericServlet.java:244)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1453)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:1093)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:189)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:722) 

在我着手提交 NetBeans 错误报告之前，我只是想看看这是否更有可能是开发人员错误，而不是开发人员工具集的错误。想法？

• 数据库:PostgreSQL 8.4
• 应用服务器:Glassfish 3.1.2.2
• IDE:NetBeans 7.2
• JDK:7 更新 7

Answer 1

问题的出现是因为 remove 和 find 方法都将 TesttablePK 类型与 @PathParam 结合使用，但 Jersey 找不到将字符串从 url 转换为此类对象的方法。这个可以通过修改TesttablePK类型来解决。您有两个选择:

• 添加一个接受单个字符串参数的构造函数。
• 或者添加一个名为 valueOf 或 fromString 的静态方法，它接受一个 单个字符串参数

因此，您需要决定如何将复合键表示为字符串，并将这样的字符串转换为 TesttablePK 类型。