我在 Websphere 服务器中创建了数据源,它的名称是 myDataSource(JNDI 名称是 oracleDS)。现在我想通过独立应用程序访问它。
我刚刚编写了下面的代码来访问数据源。
Hashtable<String, String> pdEnv = new Hashtable<String, String>();
pdEnv.put(Context.INITIAL_CONTEXT_FACTORY,"com.ibm.websphere.naming.WsnInitialContextFactory");
pdEnv.put(Context.PROVIDER_URL, "iiop://localhost:2809");
Context initialContext = new InitialContext(pdEnv);
DataSource dataSource = (DataSource) initialContext
.lookup("java:comp/env/jdbc/oracleDS");
但是当我运行应用程序时,我得到了以下异常。
Aug 6, 2013 11:33:41 PM null null
SEVERE: javaAccessorNotSet
javax.naming.ConfigurationException: Name space accessor for the java: name space has not been set. Possible cause is that the user is specifying a java: URL name in a JNDI Context method call but is not running in a J2EE client or server environment.
请让我知道我是否必须在 websphere 中进行任何配置更改才能访问数据源或我必须做的任何其他代码级别更改?
请确认我们可以从容器(websphere)外部访问数据源吗?
更新1:
我遵循了 PhilipJ 提到的方式。然后我得到了下面的例外。
SEVERE: Cannot get connection: javax.naming.NameNotFoundException: Context: LTC-VIRTUS-24WZNode01Cell/nodes/LTC-VIRTUS-24WZNode01/servers/server1, name: jdbc/oracleDS: First component in name oracleDS not found. [Root exception is org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.org/CosNaming/NamingContext/NotFound:1.0]
javax.naming.NameNotFoundException: Context: LTC-VIRTUS-24WZNode01Cell/nodes/LTC-VIRTUS-24WZNode01/servers/server1, name: jdbc/oracleDS: First component in name oracleDS not found. [Root exception is org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.org/CosNaming/NamingContext/NotFound:1.0]
at com.ibm.ws.naming.jndicos.CNContextImpl.mapNotFoundException(CNContextImpl.java:4365)
at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1794)
at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1749)
at com.ibm.ws.naming.jndicos.CNContextImpl.lookupExt(CNContextImpl.java:1500)
at com.ibm.ws.naming.jndicos.CNContextImpl.lookup(CNContextImpl.java:637)
at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:165)
at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:179)
at javax.naming.InitialContext.lookup(InitialContext.java:436)
at com.nyl.connection.ConnectionUtil.getConnection(ConnectionUtil.java:38)
at com.nyl.main.Main.main(Main.java:9)
Caused by: org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.org/CosNaming/NamingContext/NotFound:1.0
at org.omg.CosNaming.NamingContextPackage.NotFoundHelper.read(NotFoundHelper.java:95)
at com.ibm.WsnOptimizedNaming._NamingContextStub.resolve_complete_info(_NamingContextStub.java:506)
at com.ibm.ws.naming.jndicos.CNContextImpl$2.run(CNContextImpl.java:2797)
at com.ibm.ws.naming.jndicos.CNContextImpl$2.run(CNContextImpl.java:2793)
at com.ibm.ws.naming.util.CommonHelpers.retry(CommonHelpers.java:763)
at com.ibm.ws.naming.jndicos.CNContextImpl.cosResolve(CNContextImpl.java:2791)
at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1790)
... 8 more
更新2:
我找到了避免异常的方法。代码应该如下,
Hashtable<String, String> pdEnv = new Hashtable<String, String>();
pdEnv.put(Context.INITIAL_CONTEXT_FACTORY,"com.ibm.websphere.naming.WsnInitialContextFactory");
pdEnv.put(Context.PROVIDER_URL, "iiop://localhost:2809");
Context initialContext = new InitialContext();
DataSource datasource = (DataSource) initialContext.lookup("oracleDS");
if (datasource != null) {
connection = datasource.getConnection("admin","admin");
} else {
LOGGER.info("Failed to lookup datasource.");
}
但这里的问题是我正在给数据库凭据来创建连接。我不想给它。任何人都可以让我知道如何在不提供数据库凭据的情况下创建连接吗?