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Tarin,
On 3/8/18 1:56 PM, Mark Thomas wrote:
> On 08/03/18 18:53, Tarin Gamberini wrote:
>> On 08/03/2018 17:52, Rémy Maucherat wrote:
>>> On Thu, Mar 8, 2018 at 5:26 PM, Tarin Gamberini
>>>> [cut] # PROBLEM
>>>>
>>>> I have two datasources in the same web application:
>>>>
>>>> <ResourceLink global="jdbc/abc/ABC" name="jdbc/abc"
>>>> type="javax.sql.DataSource"/> <ResourceLink
>>>> global="jdbc/abc/jkl/XXX_YYY" name="jdbc/abc/jkl"
>>>> type="javax.sql.DataSource"/> [cut]
>>>
>>> Well, you have "abc" that s already bound and is a datasource,
>>> then you try to create a subcontext "abc" and it doesn't work.
>>>
>> Sorry, I'm not sure I have understood what you mean. Just for
>> clarification:
>>
>> 1. By «you have "abc" that s already bound and is a datasource»
>> are you thinking about the "abc" just after "jdbc/" in
>> «global="jdbc/abc/ABC"» ?
>>
>> 2. By «then you try to create a subcontext "abc"» are you
>> thinking about the ending ABC in «global="jdbc/abc/ABC"» ?
>
> No. Look at the names, not the global names.
It might help to understand a bit about how JNDI works. It's very much
like a filesystem where you have directories and files. A particular
path name can either be a file or a directory, but not both.
For example, on a standard *NIX system, you can't have a file called
/etc because there needs to be an /etc directory with files in it.
In your case, you are first creating a DataSource (the analogy here is
a file) called "jdbc/abc", and then you are trying to create another
DataSource "inside" that path "jdbc/abc" called "jdbc/abd/ABC". In
order to create "jdbc/abc/ABC", the path "jdbc/abc" must be a
directory, not a file. (In JNDI, it must be a Context, but it's a
DataSource instead).
If you were thinking that the JNDI namespace was like a map of
full-paths -> objects:
comp:env/java/jdbc/abc -> DataSource
comp:env/java/jdbc/abc/ABC -> DataSource
It doesn't work that way. Instead, the / character actually separates
parts of the hierarchy and each part has to have the expected type,
like this:
comp:env -> context
java -> context
jdbc -> context
abc -> DataSource
[can't create a path below a DS]
Hope that helps,
- -chris
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