Question

在为mongo模板检索jndi时，我收到了ClassCastException。

我的server.xml中有以下上下文标记。

<Context
    path="/JavaFormBuilderMongoDB-1.0"
    docBase="D:/apache-tomcat-8.5.15/webapps/JavaFormBuilderMongoDB-1.0.war"
    reloadable="false"
    override="true"
    allowLinking="true">
   <Resource name="jdbc/testMongodbDS" auth="Container" global="jdbc/testMongodbDS"
        type="org.springframework.data.mongodb.core.MongoTemplate"
        factory="com.dt.formbuilder.CustomMongoJNDIFactory"
        host="localhost" port="27017" db="testmongo" username="" password=""/>
</Context>

在上面的资源中，我使用自定义工厂来检索Mongo Template。在代码中我尝试使用jndi进行检索。用于检索mongo模板的代码段是

public @Bean MongoTemplate mongoTemplate() throws Exception {
         Context initCtx = new InitialContext();
         Context envCtx = (Context) initCtx.lookup("java:comp/env");
         Object object =envCtx.lookup("jdbc/testMongodbDS");
         return (MongoTemplate) object;
}//mongoTemplate()

但是在将对象转换为Mongo Template时，我遇到了异常。

org.springframework.jndi.TypeMismatchNamingException: Object of type [class org.springframework.data.mongodb.core.MongoTemplate] available at JNDI location [java:/comp/env/jdbc/testMongodbDS] is not assignable to [org.springframework.data.mongodb.core.MongoTemplate]
    at org.springframework.jndi.JndiTemplate.lookup(JndiTemplate.java:182) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.jndi.JndiLocatorSupport.lookup(JndiLocatorSupport.java:95) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.jndi.JndiObjectLocator.lookup(JndiObjectLocator.java:106) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.jndi.JndiObjectFactoryBean.lookupWithFallback(JndiObjectFactoryBean.java:231) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.jndi.JndiObjectFactoryBean.afterPropertiesSet(JndiObjectFactoryBean.java:217) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]

Spring引导jndi类型不匹配异常

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