Unable to get an Oracle connection.

Hi,

I am using the following piece of code in order to get an oracle connection in a custom smart service plugin :-

public static Connection openNewConnection(String url, String username, String password) throws ClassNotFoundException, SQLException {
                    DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
                    Connection connection = DriverManager.getConnection(url, username, password);
                    return connection;
}

It works perfectly fine as a standalone, but when used inside an Appian custum plugin, it gives "ClassCastExcepton" with the following message :-
"oracle.jdbc.driver.T4CConnection cannot be cast to oracle.jdbc.OracleConnection".

Any clues to this issue ?

OriginalPostID-235583

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  • What do you mean by "issue remained the same"? Are you saying even with a JNDI lookup, you get a ClassCastException, or a different error? Have you tried looking at how some existing shared components, like ExcelTools, handle these connections? For example, ExcelTools has a Export SQL To Flat File service that does an ad-hoc RDBMS connection as the documentation indicates. I know this plugin works with Oracle datasources so it might be a good starting point. I also recommend sharing your plugin project with Appian Support via support case, and the assigned engineer might be able to help.
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  • What do you mean by "issue remained the same"? Are you saying even with a JNDI lookup, you get a ClassCastException, or a different error? Have you tried looking at how some existing shared components, like ExcelTools, handle these connections? For example, ExcelTools has a Export SQL To Flat File service that does an ad-hoc RDBMS connection as the documentation indicates. I know this plugin works with Oracle datasources so it might be a good starting point. I also recommend sharing your plugin project with Appian Support via support case, and the assigned engineer might be able to help.
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