无法使用PropertyPlaceholderConfigurer在JNDI上下文中找到属性

Question

I want to remove env-entry from WEb.XML

<env-entry>
    <description>String used in masking process</description>
    <env-entry-name>default_mask</env-entry-name>
    <env-entry-value>*</env-entry-value>
    <env-entry-type>java.lang.String</env-entry-type>
</env-entry>

so I created a properties file having (c:/my.properties)

default_mask=9999   

So I try to use the existing solution like JndiPropertyPlaceholderConfigurer (from Spring Jndi Context and PropertyPlaceholderConfigurer ) and configured following in spring's applicationcontext.xml as

<bean  
class="com.test.webappl.JndiPropertyPlaceholderConfigurer">  
<property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE"/> 
<property name="ignoreResourceNotFound" value="true"/> 
<property name="location" value="file:c:\my.properties"/>  

Starting Tomcat server reads the property file like

.......com.test.webappl.JndiPropertyPlaceholderConfigurer] Loading properties file from URL [file:c:/my.properties]

Now in java when I read

Context context = new InitialContext(); 
String resource = context.lookup("java:comp/env/default_mask");  

application throws following error

**javax.naming.NameNotFoundException: Name default_mask is not bound in this Context**

also my spring setting in web.xml are

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationcontext.xml</param-value>
</context-param>

Anybody knows if I'm using the correct way? I know this has been answered in Spring Jndi Context and PropertyPlaceholderConfigurer but somehow not working in my case

Thanks in Advance

Answer 1

If you're deploying anything to any application server it's a good idea to package all relevant resources to the deployment unit (war in your case).

To answer your question - if you're using spring to inject anything to the JNDI container, you should also let spring locate everything for you.

So you can't use

new InitialContext(); // this has nothing to do with spring.

Hope this helps :)

Answer 2

What you are trying (or expecting) to do is "Bind the name value pairs from your my.properties to JNDI context".

BUT

The example that you referred does not DO that. Is simply does following things

1. If there is a property placeholder referred in the context file (like ${my.name} ), then it will resolve it from JNDI (assuming its already there)
2. If its not available from JNDI then resolve it to some default read from a property file.
3. Nowhere its details about Binding variables to JNDI. There is no reference to bind() method.

Now, To solve your problem ie get some way of reading the properties file and bind that to JNDI tree, one way would be following

1. You can create a class JndiPropertyBinder and inject jndiTemplate in it.
2. Inject your property file in this class
3. Now write a init hook on the bean where in it will read all the property in the file and bind them to jndi tree.
4. Make this bean to load very early in order so that its loaded before all the other beans which are using it.