从 WAS 迁移到 Liberty 时出现 JNDI 上下文初始化错误

Question

WsnInitialContextFactory 类未找到异常。 Liberty 不支持这个类，那我怎么去掉jndi.properties 默认设置。此属性文件包含 InitialContext 的此类名称。

属性：

INITIAL_CONTEXT_FACTORY = "com.ibm.websphere.naming.WsnInitialContextFactory" 
CC_PROVIDER_URL = "iiop://localhost.svr.us.xxxxxxx.net:41516"

InitialContext 查找：

   try {
        Hashtable params = new Hashtable();
        params.put(Context.INITIAL_CONTEXT_FACTORY, ADProperties.WS_INITIAL_CONTEXT_FACTORY);
        params.put(Context.PROVIDER_URL, ADProperties.AD_PROVIDER_URL);

        Context ctx = new InitialContext(params);
        try {
            ds = (DataSource) ctx.lookup("java:comp/env/" + jndiName);
        } catch (Exception ex) {
            LogUtil.debugException("DBConnectionManager", "Exception in init: Resource reference DataSource lookup Error.", "init()", ex, "");
            try {
                ds = (DataSource) ctx.lookup("jdbc/" + jndiName);
            } catch (Exception exp) {
                LogUtil.debugException("DBConnectionManager", "Exception in init: Datasource lookup Error.", "init()", exp, "");
            }
        }

例外：

[INFO] [err] java.lang.NoClassDefFoundError: Could not initialize class com.ibm.websphere.naming.WsnInitialContextFactory
[INFO] [err]    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
[INFO] [err]    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
[INFO] [err]    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
[INFO] [err]    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
[INFO] [err]    at com.ibm.ws.jndi.internal.WASInitialContextFactoryBuilder.createInitialContextFactory(WASInitialContextFactoryBuilder.java:57)
[INFO] [err]    at [internal classes]
[INFO] [err]    at java.naming/javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:730)
[INFO] [err]    at java.naming/javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:305)
[INFO] [err]    at java.naming/javax.naming.InitialContext.init(InitialContext.java:236)
[INFO] [err]    at java.naming/javax.naming.InitialContext.<init>(InitialContext.java:184)

Answer 1

Liberty 不支持 WsnInitialContextFactory 类。您可以这样做（它也可以在传统的 WebSphere 中工作）：

try {
    Context ctx = new InitialContext(new Hashtable());
    try {
        ds = (DataSource) ctx.lookup("java:comp/env/" + jndiName);
    } catch (Exception ex) {
        LogUtil.debugException("DBConnectionManager", "Exception in init: Resource reference DataSource lookup Error.", "init()", ex, "");
        try {
            ds = (DataSource) ctx.lookup("jdbc/" + jndiName);
        } catch (Exception exp) {
            LogUtil.debugException("DBConnectionManager", "Exception in init: Datasource lookup Error.", "init()", exp, "");
        }
    }