Wednesday, July 19, 2006

WebLogic Diagnostics Framework

WebLogic Diagnostic Framework (WLDF) is a monitoring and diagnostic framework that defines and implements a set of services that run within BEA WebLogic Server processes and participate in the standard server life cycle. WLDF falls somewhere between the old way of monitoring the environment (using the console or developing JMX based monitoring tools) and the fancy third-party JMX and SNMP monitoring tools.Using WLDF, you can create, collect, analyze, archive, and access diagnostic data generated by a running server and the applications deployed within its containers.WLDF includes several components for collecting and analyzing data:
  • Diagnostic Image Capture: Creates a diagnostic snapshot from the server that can be used for post-failure analysis.
  • 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, usually at the beginning or end of a method (achieved using AspectJ) . The Instrumentation component provides the means for associating a diagnostic context with requests so they can be tracked as they flow through the system.
  • 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.
  • Watches and Notifications: Provides the means for monitoring server and application states and sending notifications based on criteria set in the watches.
  • Logging services: Manages logs for monitoring server, subsystem, and application events.
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. Independent Software Vendors (ISVs) can use these APIs to develop custom monitoring and diagnostic tools for integration with WLDF.
WLDF was a new feature in WebLogic Server 9.0. 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.
References
Posted by at
Labels:

1 comment:

Subscribe to: Post Comments (Atom)

Popular Posts

  • Using Quartz Scheduler in a cluster
    In a previous post, I described how to use Quartz scheduler for scheduling . In this post, I describe the configuration changes required for...
  • Unit Testing with JUnit 4.0
    JUnit 4 introduces a completely different API to the older versions. JUnit 4 uses Java 5 annotations to describe tests instead of using in...
  • Implementing JMS with Spring: Messaging Client
    Last week, I described how to implement JMS, using a stand-alone client and a Message Driven Bean . In this post and the next, I will descr...
  • Deploy Java Web Application on Heroku with Heroku CLI
    This post will describe how to create and deploy a Java Web Application war to Heroku using Heroku CLI. You will need a basic understanding ...
  • Merge PDF files with iText
    New posts with iText 5.5.12 Following are two new posts for PDF Merge with iText 5.5.12 Merge PDF files using iText 5 Merge and Paginate PDF...
  • Implementing JMS with Spring: Message Driven POJO
    The previous post described how to implement a JMS messaging client using Spring JMS . This post will describe how to implement the Message ...
  • Merge PDF files using iText 5
    This is an example code for a simple PDF merge using iText 5. We use three InputStream s in a List as input and merged file is written to th...
  • Struts 2: Validation
    Update: A new post for validation in struts with annotation is available at: Struts 2 Validation: Annotations . Struts 2.0 relies on a val...
  • Merge and Paginate PDF files using iText 5
    In this post we will see a way to merge multiple PDF files while adding page numbers at the bottom of each page in the format Page 1 of 10 ....
  • Pagination with DisplayTag
    Displaytag is an opensource tag library that can be used to display tables on JSPs. Apart from being able to display tables, the displaytag...