Question

我们目前正在从Tomcat迁移到Wildfly 10服务器。我们喜欢利用Java EE Server。目前我们在DataSource方面存在一些问题。我们在Wildfly上部署了JDBC驱动程序并设置了DataSource。这主要是好的，但我们喜欢使用DatabaseQueryNotification（Oracle）进行数据库端事件。

现在遇到的问题是：

当我用我的战争（另外）打包驱动程序时，由于T4Connection和OracleConnection不匹配，我得到一个ClassCastException。因此，我从我的战争中移除了JDBC驱动程序（maven - ＆gt;范围：提供）。但是现在我的应用程序在部署上失败了，因为NoClassDefFound（参见Stacktrace bellow）。

如何确保应用程序可以找到JDBC驱动程序？

Java代码段：

public class DBListener implements IDBListener, Runnable, DatabaseChangeListener, IPropertyListener, Serializable {  
     @Resource(lookup = "java:/PlsDS")  
     private DataSource dataSource;  
     ...  
     public void connectToDB(){
       Connection tmpCon = dataSource.getConnection();  
       connection = (OracleConnection) tmpCon.getMetaData().getConnection();  
       ...
     }
}

堆栈跟踪：

14:32:59,869 WARN  [org.jboss.modules] (MSC service thread 1-7) Failed to define class de.istec.pls.client.db.listener.DBListener in Module "deployment.client.pls-sc-1.0.0-SNAPSHOT.war:main" from Service Module Loader: java.lang.NoClassDefFoundError: Failed to link de/istec/pls/client/db/listener/DBListener (Module "deployment.client.pls-sc-1.0.0-SNAPSHOT.war:main" from Service Module Loader): oracle/jdbc/dcn/DatabaseChangeListener
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:446)
    at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:274)
    at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:78)
    at org.jboss.modules.Module.loadModuleClass(Module.java:606)
    at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:363)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:351)
    at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:93)
    at org.wildfly.extension.undertow.deployment.ServletContainerInitializerDeploymentProcessor.loadClassInfoSet(ServletContainerInitializerDeploymentProcessor.java:259)
    at org.wildfly.extension.undertow.deployment.ServletContainerInitializerDeploymentProcessor.deploy(ServletContainerInitializerDeploymentProcessor.java:169)
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:147)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

14:32:59,871 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-7) MSC000001: Failed to start service jboss.deployment.unit."client.pls-sc-1.0.0-SNAPSHOT.war".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.unit."client.pls-sc-1.0.0-SNAPSHOT.war".INSTALL: WFLYSRV0153: Failed to process phase INSTALL of deployment "client.pls-sc-1.0.0-SNAPSHOT.war"
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:154)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

Caused by: java.lang.NoClassDefFoundError: Failed to link de/istec/pls/client/db/listener/DBListener (Module "deployment.client.pls-sc-1.0.0-SNAPSHOT.war:main" from Service Module Loader): oracle/jdbc/dcn/DatabaseChangeListener
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:446)
    at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:274)
    at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:78)
    at org.jboss.modules.Module.loadModuleClass(Module.java:606)
    at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:363)
    at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:351)
    at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:93)
    at org.wildfly.extension.undertow.deployment.ServletContainerInitializerDeploymentProcessor.loadClassInfoSet(ServletContainerInitializerDeploymentProcessor.java:259)
    at org.wildfly.extension.undertow.deployment.ServletContainerInitializerDeploymentProcessor.deploy(ServletContainerInitializerDeploymentProcessor.java:169)
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:147)

Answer 1

我已经解决了问题：

我必须将JDBC驱动程序部署为模块（请参阅： http://hpehl.info/jdbc-driver-setup.html）
我必须从模块
在Manifest.MF文件中插入Dependency。（可以由Maven完成，见下文）

<强> module.xml

<module xmlns="urn:jboss:module:1.1" name="com.oracle">
  <resources>
    <resource-root path="ojdbc7-12.1.0.2.jar"/>
  </resources>
  <dependencies>
    <system export="true">
        <paths>
            <path name="oracle/jdbc/OracleStatement"/>
            <path name="oracle/jdbc/dcn/DatabaseChangeEvent"/>
            <path name="oracle/jdbc/dcn/DatabaseChangeListener"/>
            <path name="oracle/jdbc/dcn/DatabaseChangeRegistration"/>
            <path name="oracle/jdbc/dcn/QueryChangeDescription"/>
            <path name="oracle/jdbc/dcn/RowChangeDescription"/>
        </paths>
    </system>
    <module name="javax.api"/>
    <module name="javax.transaction.api"/>
  </dependencies>
</module>

<强>的pom.xml

<plugin>
    <artifactId>maven-war-plugin</artifactId>
    <version>3.1.0</version>
    <configuration>
        <archive>
          <manifestEntries>
             <Dependencies>com.oracle</Dependencies>
          </manifestEntries>
        </archive>
    </configuration>
</plugin>

Answer 2

您应该通过JNDI获取数据源的实例或通过CDI注入。

如何将可以由WebApp使用的JDBC驱动程序部署到Wildfly

2 个答案: