Append value to JDBC connection property

Question

Looking for an example (or suggestions) on how to use ByteBuddy to intercept and append a value on a JDBC connection property. The goal is to be able to use a JavaAgent to append a unique value for transaction correlation WITHOUT client code changes. Example:

    Properties props = new Properties();
    props.put("user", user);
    props.put("password", password);
    props.put("ClientCorrelationToken", "MyToken1");

Want ClientCorrelaionToken to result as "MyToken1appendedValue"

Looked any many examples but cannot find a suitable method.

Ultimately need to be able to pull in a unique token from a web header and place that into the JDBC property, but want to get the intercept working first.

Err, append `"appendedValue"` to `"Mytoken1"`? What exactly is the problem here? — user207421, Mar 28 '18 at 08:42

score -1 · Answer 1 · answered Mar 28 '18 at 08:28

You probably need to intercept the JDBC constructor and mutate or exchange the properties argument upon invocation.

For example, you can use the AgentBuilder to intercept all types that are a subtype of a JDBC driver and adjust their constructors using Advice. If there is a standard API that you know of, you can also implement a more fine-grained interception.

Append value to JDBC connection property

1 Answers1