The suite of services, components, and APIs provided by WLDF for collecting and analyzing data includes the following:

• Integration with Oracle HotSpot—If WebLogic Server is configured with Oracle HotSpot, WLDF can generate diagnostic information about WebLogic Server that is captured in the Java Flight Recorder file.

• Built-in diagnostic system modules—A set of diagnostic modules available out-of-the-box that you can enable dynamically to capture basic performance data about the JVM, the WebLogic Server run time, and primary WebLogic Server subsystems, including JDBC data sources, messaging, and Jakarta EE containers, such as servlets, EJBs, and resource adapters. The built-in diagnostic modules can also be cloned and modified, providing a simple way to create custom diagnostic system modules.

• Monitoring Dashboard—Graphically presents the current and historical operating state of WebLogic Server and hosted applications, including information gathered by the built-in diagnostic system modules. The Monitoring Dashboard, which is accessed from the WebLogic Remote Console, provides a set of tools for organizing and displaying diagnostic data into views, which surface some of the more critical run-time WebLogic Server performance metrics and the change in those metrics over time.

• Diagnostic Image Capture—Creates a diagnostic snapshot from the server that can be used for post-failure analysis. The diagnostic image capture includes Java Flight Recorder data, if it is available, that can be viewed in Java Mission Control.

• Archive—Captures and persists data events, log records, and metrics from server instances and applications.

• Instrumentation—Adds diagnostic code to WebLogic Server instances and the applications running on them to execute diagnostic actions at specified locations in the code. The Instrumentation component provides the means for associating a diagnostic context with requests so they can be tracked as they flow through the system. The WebLogic Remote Console includes a Performance page, which shows real-time and historical views of method performance information that has been captured through the WLDF instrumentation capabilities, serving as a tool that can help identify performance problems in applications.

• Harvester—Captures metrics from run-time MBeans, including WebLogic Server MBeans and custom MBeans, which can be archived and later accessed for viewing historical data.

• Policies and Actions—Provides the means for monitoring server and application states and sending notifications based on criteria set in the policies.

• Logging services—Manage logs for monitoring server, subsystem, and application events. The WebLogic Server logging services are documented separately from the rest of the WebLogic Diagnostics Framework. See Related Documentation.

WLDF provides a set of standardized application programming interfaces (APIs) that enable dynamic access and control of diagnostic data, as well as improved monitoring that provides visibility into the server. These APIs can be accessed using the JMX and the WebLogic Scripting Tool (WLST), as described in Configuring and Using WLDF Programmatically.

WLDF enables dynamic access to server data through standard interfaces, and the volume of data accessed at any given time can be modified without shutting down and restarting the server.