Friday Sep 28, 2012

OSB, Service Callouts and OQL

Oracle Fusion Middleware customers use Oracle Service Bus (OSB) for virtualizing Service endpoints and implementing stateless service orchestrations. Behind the performance and speed of OSB, there are a couple of key design implementations that can affect application performance and behavior under heavy load. One of the heavily used feature in OSB is the Service Callout pipeline action for message enrichment and invoking multiple services as part of one single orchestration. Overuse of this feature, without understanding its internal implementation, can lead to serious problems.

This series will delve into OSB internals, the problem associated with usage of Service Callout under high loads, diagnosing it via thread dump and heap dump analysis using tools like ThreadLogic and OQL (Object Query Language) and resolving it.

The first section in the series will mainly cover the threading model used internally by OSB for implementing Route Vs. Service Callouts.

The second section of the "OSB, Service Callouts and OQL" blog posting will delve into thread dump analysis of OSB server and detecting threading issues relating to Service Callout and using Heap Dump and OQL to identify the related Proxies and Business services involved.

The final section of the series will focus on the corrective action to avoid Service Callout related OSB serer hangs. Before we dive into the solution, we need to briefly discus about Work Managers in WLS.

Please refer to the blog posting for more details.


Friday Sep 21, 2012

Exalogic 2.0.1 Tea Break Snippets - Scripting Asset Creation

So far in this series we have looked at creating asset within the EMOC BUI but the Exalogic 2.0.1 installation also provide the Iaas cli as an alternative to most of the common functionality available within EMOC. The IaaS cli interface provides access to the functions that are available to a user logged into the BUI with the CloudUser Role.

As such not all functionality is available from the command line interface however having said that the IaaS cli provides all the functionality required to create the Assets within a specific Account (Tenure). Because these action are common and repeatable I decided to wrap the functionality within a simple script that takes a simple input file and creates the Asset.

Following the Script through will show us the required steps needed to create the various Assets within an Account and hence I will work through the various functions within the script below describing the steps.

You will note from the various steps within the script that it is designed to pause between actions allowing the proceeding action to complete. The reason for this is because we could swamp EMOC with a series of actions and may end up with a situation where we are trying to action a Volume attached before the creation of the vServer and Volume have completed.[Read More]
About

The primary contributors to this blog are comprised of the Exalogic and Cloud Application Foundation contingent of Oracle's Fusion Middleware Architecture Team, fondly known as the A-Team. As part of the Oracle development organization, The A-Team supports some of Oracle's largest and most strategic customers worldwide. Our mission is to provide deep technical expertise to support various Oracle field organizations and customers deploying Oracle Fusion Middleware related products. And to collect real world feedback to continuously improve the products we support. In this blog, our experts and guest experts will focus on Exalogic, WebLogic, Coherence, Tuxedo/mainframe migration, Enterprise Manager and JDK/JRockIT performance tuning. It is our way to share some of our experiences with Oracle community. We hope our followers took away something of value from our experiences. Thank you for visiting and please come back soon.

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