Abstract: A method, apparatus, and computer instructions for identifying unsafe synthetic transactions and modifying parameters for automated playback. Bytecode instrumentation is used to dynamically observe the behavior of application code directly and identify each universal resource locator traversed and parameters passed in a transaction. The bytecode instrumentation may determine, based on the parameters passed, that a parameter in the current transaction is an unsafe parameter, and that the unsafe parameter is associated with a test parameter in a previously overridden transaction. If the unsafe parameter has an associated test parameter, the bytecode instrumentation may dynamically override the unsafe parameter in the current transaction with the test parameter in order to make the transaction safe for synthetic playback.

Abstract: A method, apparatus, and computer instructions for programmatically generating synthetic transactions to monitor performance and availability of a Web application. The mechanism of the present invention may be implemented as a Java 2 Platform Enterprise Edition (J2EE) transaction, wherein the J2EE application is instrumented with just-in-time-instrumentation (JITI). A JITI probe determines if a customer request object contains a cookie. If not, the JITI probe inserts a cookie into the response object. The cookie is used to track URIs visited by the customer. An algorithm is used to identify the baseline customer transaction path based on the URIs in the cookie. All baseline customer transaction paths for all customers are then correlated to form a unique transaction, wherein the unique transaction comprises the most common tasks performed in the Web application. The Web application may then be monitored by programmatically recording and scheduling playback of the unique transaction.