导入Vaadin SimpleCRM示例应用程序进行本地开发的困难

Question

我在导入SimpleCRM示例应用程序（vaadin-jpa-app）时遇到了一些麻烦，该应用程序位于1月20日Vaadin博客文章“以数据为中心的富internet应用程序的配方”的底部（链接：https://Vaadin.com/Blog/-/blogs/a-recipe-for-a-data-centric-rich-internet-application）

按照readme.md中的描述，在git从https://hub.jazz.net/git/vaadin/vaadin-jpa-app克隆存储库之后，我试图将项目作为Maven项目导入到Eclipse Luna中，但不幸地收到了以下与pom.xml文件相关的错误：

vaadin-maven-plugin:7.3.7:参考资料vaadin-maven-plugin:7.3.7:update-theme vaadin-maven-plugin:7.3.7:update-widgetset

无论如何，我都试图将应用程序部署到WebSphere Liberty Profile服务器上，但得到一个“上下文根未找到”错误。

我还注意到，在WebSphere Application Server Liberty Profile下的Server.xml文件中，在复制了readme.md（从https://hub.jazz.net/project/vaadin/vaadin-jpa-app/overview）的“本地开发”部分中概述的相关代码后，我看到了一些警告，其中提到“jdbcdriver”和“datasource”元素“未被可用特性启用”

更熟悉这个过程的人能告诉我应该做什么吗？不胜感激。谢了！

准备工作：

1）在Eclipse中，我通过Eclipse Marketplace安装了WebSphere Application Server Liberty配置文件(http://Marketplace.Eclipse.org/content/ibm-websphere-application-server-liberty-profile-developer-tools-luna-0)

2）在Eclipse中的Enterprise Explorer下，在WebSphere Application Server Liberty Profile servers defaultServer Server.xml中，我添加了自述文件中概述的JDBC驱动程序配置代码段。

3）我将derby.jar文件添加到自述文件中提到的适当目录中

4）我安装了m2e-wtp连接器（http://marketplace.eclipse.org/content/maven-java-ee-integration-eclipse-wtp-luna）

5）使用Git Shell，I Git克隆https://hub.jazz.net/Git/vaadin/vaadin-jpa-app

部署应用程序：

6）之后，在Eclipse中，我导入刚刚作为“现有Maven项目”克隆的vaadin-jpa-app目录。这将在Eclipse Enterprise Explorer中创建一个vaadin-jpa-app项目和一个vaadin-jpa-applicationEAR项目。

7）在这一点上，通过选择“do Not Execute（add to pom）”作为每个“错误”的操作，我前面描述的三个“错误”得到了纠正。（描述：放置元数据，告诉m2e忽略将Maven插件添加到构建中的pom中的执行。）

8）右击“vaadin-jpa-application[vaadin-jpa-app master]”项目并选择Run As Maven Install。

9）右键单击“vaadin-jpa-application[vaadin-jpa-app master]”项目并选择Run As Run On Server。

10）在localhost下选择WebSphere Application Server Liberty配置文件，并确保只有vaadin-jpa-application（而不是vaadin-jpa-applicationEAR）在“configured：”列下。

Launching defaultServer (WebSphere Application Server 8.5.5.4/wlp-1.0.7.cl50420141211-1039) on Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_25-b18 (en_US)
[AUDIT   ] CWWKE0001I: The server defaultServer has been launched.
[AUDIT   ] CWWKZ0058I: Monitoring dropins for applications. 
[ERROR   ] SRVE9990E: The class org.vaadin.presentation.Servlet has a @WebServlet annotation but does not implement the javax.servlet.http.HttpServlet interface.
[ERROR   ] SRVE9991E: The class org.vaadin.presentation.CompressionFilter has a @WebFilter annotation but does not implement the javax.servlet.Filter interface.
[WARNING ] CWWJP9991W: openjpa.Enhance: Warn: An exception was thrown while attempting to perform class file transformation on "org.vaadin.backend.domain.Customer":
      Exception : java.lang.NoClassDefFoundError
    java.lang.NoClassDefFoundError: Lcom/vividsolutions/jts/geom/Point;
[WARNING ] CWWJP9991W: openjpa.Enhance: Warn: An exception was thrown while attempting to perform class file transformation on "org.vaadin.backend.domain.Customer":
      Exception : java.lang.NoClassDefFoundError
    java.lang.NoClassDefFoundError: Lcom/vividsolutions/jts/geom/Point;
[WARNING ] CWNEN0049W: Resource annotations on the methods of the org.vaadin.backend.CustomerService class will be ignored. The annotations could not be obtained because of the exception : <openjpa-2.2.3-SNAPSHOT-r422266:1595313 nonfatal general error> org.apache.openjpa.util.GeneralException: Lcom/vividsolutions/jts/geom/Point;
[WARNING ] CWWJP9991W: openjpa.Enhance: Warn: An exception was thrown while attempting to perform class file transformation on "org.vaadin.backend.domain.Customer":
      Exception : java.lang.NoClassDefFoundError
    java.lang.NoClassDefFoundError: Lcom/vividsolutions/jts/geom/Point;
[ERROR   ] CNTR4006E: The CustomerService enterprise bean in the vaadin-jpa-application.war module of the vaadin-jpa-application application failed to start. Exception: <openjpa-2.2.3-SNAPSHOT-r422266:1595313 nonfatal general error> org.apache.openjpa.util.GeneralException: Lcom/vividsolutions/jts/geom/Point;
    at org.apache.openjpa.enhance.PCClassFileTransformer.transform0(PCClassFileTransformer.java:164)
    at org.apache.openjpa.enhance.PCClassFileTransformer.transform(PCClassFileTransformer.java:126)
    at org.apache.openjpa.persistence.PersistenceProviderImpl$ClassTransformerImpl.transform(PersistenceProviderImpl.java:290)
    at com.ibm.ws.jpa.management.JPAPUnitInfo.transformClass(JPAPUnitInfo.java:1380)
    at [internal classes]
Caused by: java.lang.NoClassDefFoundError: Lcom/vividsolutions/jts/geom/Point;
    at java.lang.Class.getDeclaredFields0(Native Method)
    at java.lang.Class.privateGetDeclaredFields(Class.java:2575)
    at java.lang.Class.getDeclaredFields(Class.java:1908)
    at org.apache.openjpa.lib.util.J2DoPrivHelper$7.run(J2DoPrivHelper.java:297)
    at org.apache.openjpa.lib.util.J2DoPrivHelper$7.run(J2DoPrivHelper.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.apache.openjpa.persistence.PersistenceMetaDataDefaults.determineImplicitAccessType(PersistenceMetaDataDefaults.java:366)
    at org.apache.openjpa.persistence.PersistenceMetaDataDefaults.determineAccessType(PersistenceMetaDataDefaults.java:334)
    at org.apache.openjpa.persistence.PersistenceMetaDataDefaults.populate(PersistenceMetaDataDefaults.java:276)
    at org.apache.openjpa.meta.MetaDataRepository.addMetaData(MetaDataRepository.java:920)
    at org.apache.openjpa.meta.MetaDataRepository.addMetaData(MetaDataRepository.java:905)
    at org.apache.openjpa.persistence.AnnotationPersistenceMetaDataParser.getMetaData(AnnotationPersistenceMetaDataParser.java:752)
    at org.apache.openjpa.persistence.AnnotationPersistenceMetaDataParser.parseClassAnnotations(AnnotationPersistenceMetaDataParser.java:545)
    at org.apache.openjpa.persistence.AnnotationPersistenceMetaDataParser.parse(AnnotationPersistenceMetaDataParser.java:415)
    at org.apache.openjpa.persistence.PersistenceMetaDataFactory.load(PersistenceMetaDataFactory.java:260)
    at org.apache.openjpa.meta.MetaDataRepository.getMetaDataInternal(MetaDataRepository.java:586)
    at org.apache.openjpa.meta.MetaDataRepository.getMetaDataInternal(MetaDataRepository.java:396)
    at org.apache.openjpa.meta.MetaDataRepository.getMetaData(MetaDataRepository.java:388)
    at org.apache.openjpa.enhance.PCEnhancer.<init>(PCEnhancer.java:286)
    at org.apache.openjpa.enhance.PCEnhancer.<init>(PCEnhancer.java:257)
    at org.apache.openjpa.enhance.PCClassFileTransformer.transform0(PCClassFileTransformer.java:146)
    ... 4 more
Caused by: java.lang.ClassNotFoundException: Could not find class 'com.vividsolutions.jts.geom.Point' as resource 'com/vividsolutions/jts/geom/Point.class'
    ... 29 more

[AUDIT   ] CWWKT0016I: Web application available (default_host): http://localhost:9080/vaadin-jpa-application/
[AUDIT   ] CWWKZ0001I: Application vaadin-jpa-application started in 4.171 seconds.
[AUDIT   ] CWWKF0011I: The server defaultServer is ready to run a smarter planet.
[WARNING ] CWWJP9991W: openjpa.Enhance: Warn: An exception was thrown while attempting to perform class file transformation on "org.vaadin.backend.domain.Customer":
      Exception : java.lang.NoClassDefFoundError
    java.lang.NoClassDefFoundError: Lcom/vividsolutions/jts/geom/Point;
[WARNING ] CWWJP9991W: openjpa.Enhance: Warn: An exception was thrown while attempting to perform class file transformation on "org.vaadin.backend.domain.Customer":
      Exception : java.lang.NoClassDefFoundError
    java.lang.NoClassDefFoundError: Lcom/vividsolutions/jts/geom/Point;
[WARNING ] CWNEN0049W: Resource annotations on the methods of the org.vaadin.backend.CustomerService class will be ignored. The annotations could not be obtained because of the exception : <openjpa-2.2.3-SNAPSHOT-r422266:1595313 nonfatal general error> org.apache.openjpa.util.GeneralException: Lcom/vividsolutions/jts/geom/Point;
[WARNING ] CWWJP9991W: openjpa.Enhance: Warn: An exception was thrown while attempting to perform class file transformation on "org.vaadin.backend.domain.Customer":
      Exception : java.lang.NoClassDefFoundError
    java.lang.NoClassDefFoundError: Lcom/vividsolutions/jts/geom/Point;

Answer 1

开始时，请确保安装的eclipse没有额外的插件，并且安装了最新版本的liberty profile插件（或其beta版）。其他eclipse插件可能会干扰部署。

还要确保您有示例项目的最新版本（git pull）。Liberty和Vaadin CDI在过去的几个月里发展得很快，可能有一些小的不兼容。

eclipse所说的“错误”只是eclipse不知道它应该如何在内部处理这些构建设置。您只需标记它们，以便eclipse忽略它们，并执行一次完整构建（mvn安装）来编译客户端资源。

如果Eclipse在导入war文件时创建了一个“EAR项目”，只需删除该项目并仅部署war文件。

在server.xml中，必须启用所需的特性。这个应用程序需要servlet、JPA、EBJ lite和CDI，但是仅仅启用整个java ee 6 web配置文件可能更容易，而且几乎同样轻量级，这就是我在我的liberty server中经常使用的：

<!-- Enable features -->
<featureManager>
    <feature>localConnector-1.0</feature>
    <feature>webProfile-6.0</feature>
</featureManager>

如果您按照指令添加了derby jar，并定义了数据源，那么事情就可以正常工作了。如果还有问题请告诉我。