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Getting db hostname and port number from a jdbc connection

Posted on 2006-06-26
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Last Modified: 2008-02-01
Hi
I have a connection like this.
<code>
    DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
         conn = DriverManager.getConnection(
            "jdbc:oracle:thin:@devbox:1521:UTF", "test", "test");
</code>

and I want to find out the following information from the connection.   I can get some of the information I need, but not all of it and the javadocs are not much help getting this out.  I've looked at INetAddress, but this seems to give local hostnames, not the hostname and the port number of the database I am connected to.
<code>
   try {
        DatabaseMetadata metaData = conn.getMetaData();
        String URL metaData.getURL();
        String hostname = /* How do we do this? */
        int port = /* how do we do this? */
        String DBType = metaData.getDatabaseProductName();
        String username = metaData.getUserName();
       } catch (SQLException e) {
                e1.printStackTrace();
       }
</code>
0
Comment
Question by:BarryMcGillin
6 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 16986247
The hostname and port are in the connection string:

hostname: devbox
port: 1521
0
 
LVL 14

Expert Comment

by:sathyagiri
ID: 16986441
Check this
http://www.princeton.edu/~storacle/jdbc8_doc/oracle.jdbc.pool.OracleDataSource.html

Looks like you can use
 getDatabaseName()

and
getPortNumber()
0
 
LVL 30

Accepted Solution

by:
Mayank S earned 500 total points
ID: 16989563
Yes but that would work only for Oracle, not for other DBs - there is no generic way to do this, unless you want to get your hands dirty with it and just parse the connection string/ URL to obtain the values (but again, the values will be in a different format in the connection-string depending on the DB/ driver).
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LVL 2

Expert Comment

by:pankilmpatel
ID: 16990970
0
 
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Author Comment

by:BarryMcGillin
ID: 16993316
These dont seem to work.  I'm wondering why this doesn't work either.
If we get back a URL, surely then creating a standard java.net.URL will be able to pull it out.
<code>
 try {
           connURL = new URL(metaData.getURL());
      } catch (MalformedURLException e) {
          e.printStackTrace();
      }
       String host = connURL.getHost();
       int port = connURL.getPort());
</code>
Unfortunately I'm getting this.....
<exception>
java.net.MalformedURLException: unknown protocol: jdbc
      at java.net.URL.<init>(URL.java:574)
      at java.net.URL.<init>(URL.java:464)
      at java.net.URL.<init>(URL.java:413)
</exception>
0
 
LVL 30

Expert Comment

by:Mayank S
ID: 16999438
java.net.URL is not for JDBC URLs. It is for web-like URLs that are on HTTP, etc.
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