Welcome!

Weblogic Authors: Yeshim Deniz, Elizabeth White, Michael Meiner, Michael Bushong, Avi Rosenthal

Related Topics: Weblogic, Microservices Expo

Weblogic: Article

Assured Delivery of Audit Data With SOA and Web Services

Reliable messaging via Web services and JMS

We propose an inexpensive combination of UN/PW with operational security design. Figure 2 displays one of the possible solutions where messages that are sent to the JMS Topic are directed to particular JMS Queues for approved receivers, e.g., Audit Service Providers.

The Message Bridges shown in the diagram have been known since the WebLogic 7.0 release and play the role of an intermediary. They subscribe to the JMS Topic and transmit messages in the transaction to the JMS Queues. Both Topic and Queues are configured with assured delivery and the Message Bridges have a durable subscription to the Topic. Each Audit Service Provider uses Message-Driven Beans (MDB) for message retrieval from the JMS Queue. The MDB starts a transaction and manages the message transition into the database in the scope of the same transaction.

If a Message Bridge is down, the message stays with JMS Topic. If a JMS Queue is down, the Message Bridge rolls back its transaction and the message still stays with the JMS Topic. If Audit Service Provider or database experiences problems, the MDB transaction rolls back and the message stays with the Queue. When problems are fixed, it is guaranteed that the message is processed and stored in the database.

The trick here is not in the technical solution, but in the operational data processing. The matter is that the information owner controls Message Bridges and approves receivers. Upon approval, the receiver is granted the Message Bridge and JMS Queue, and the operation team configures them (in addition to UN/PW). Thus, the solution gets relatively secured and is still flexible and scalable.

Design for Reliability
There are several steps to be performed to achieve reliability and guaranteed delivery via the JMS model described before. The overall system is shown in the Figure 3.

Step 1:    All JMS destinations used in the system have to be configured with assured delivery. All JMS listeners - Bridges and MDB - have to use durable subscriptions.

Step 2:    It is clear that the JMS Topic is the heart of the system. That is why we have to minimize the risk of its failure. We place the JMS Topic on a physically separated server with an automated failover feature. If a working instance of the Topic gets down, the failover instance immediately starts to work. If the sender or receiver's application server goes down, the Topic is still capable of operating.

Step 3:    Since JMS Topic becomes a remote destination, the Worker Component endures a risk of loosing audit data if the JMS Topic is not reachable. To protect audit data at this point, we add a distributed (clustered) JMS Queue, which is situated on the same cluster as the Worker Component.

Step 4:    We add Message Bridges to connect each of the instances of the distributed Queue with the JMS Topic. All Message Bridges are situated in the same cluster as the sender's distributed Queue.

Step 5:    For every receiver, create a distributed Queue that serves the receiver (e.g., Audit Service Provider). A receiver's Queue may be isolated from or collocated with the sender component.

Step 6:    Connect the JMS Topic with the receiver's distributed Queue by a Message Bridge. The latter transmits messages in the transaction to the receiver's distributed Queue. This Message Bridge is collocated with the receiver's distributed Queue.

Step 7:    Receivers, such as Audit Service Providers, use MDB to subscribe to the receiver's distributed Queue. MDB operates in the same way as described above.

Now, let's look at how it works together. The sender forms an audit message and sends it to the sender's distributed Queue where it is persisted. The Message Bridge, which connects a particular JMS Queue instance with the JMS Topic, starts a transaction, retrieves the message from the Queue, and sends it to the Topic. If Message Bridge is down or JMS Topic is unavailable, the message stays with the sender's distributed Queue until next attempt. If the message is delivered to the JMS Topic successfully, the acknowledgement is sent to the sender's distributed Queue and the message leaves from the sender's distributed Queue persistent storage. In Figure 3, four images of the Message Bridge represent a case of a cluster with four nodes where the distributed Queue is situated.

In the JMS Topic, the message is persisted again and broadcasted to durable subscribers. We have only one subscriber in the system - the Message Bridge. The latter starts transaction, retrieves message from the JMS Topic, and sends it to the receiver's distributed Queue. If Message Bridge is down or receiver's distributed Queue is unavailable, the message stays with the JMS Topic until next attempt. When the message is successfully delivered to the receiver's distributed Queue, the acknowledgement is sent and message leaves from the JMS Topic persistent storage.

If more than one receiver is permitted to get the message, a new Message Bridge and receiver's distributed Queue are configured in the system. In this case, the JMS Topic sends the message to as many durable subscribers (Message Bridges) as permitted and configured in the system. Figure 3 does not reflect if a receiver is deployed in a cluster, though it is highly recommended.

Finally, a receiver - Audit Service Provider - deploys a pool of MDB to get the messages from the receiver's distributed Queue. Each MDB starts is own transaction and Audit Service Provider persists an audit message into the Audit database in the context of this transaction. If transmission to the database results in an exception, the transaction is rolled back and the message stays with the receiver's distributed Queue until the next MDB processes it. It is important to notice that MDB uses Bean-Managed Transaction (BMT). The BMT allows Audit Service Provider to roll back the transaction if Provider experiences any problems with, for example, data transformation and throws an application exception.

The discussed system looks relatively complex. One can ask - what is the big deal here? Any Enterprise Service Bus (ESB) can solve this problem and hide all details! Of course, you are right. However, even if an ESB provides guaranteed delivery, what do you do if your organization cannot afford ESB, or it takes too long to buy the product?

Conclusion
We have described two solutions for transmitting audit or any sensitive data from the application to the database with guaranteed delivery. Both solutions are scalable and can effectively work in a distributed environment. Both solutions may be easily converted into services to be used in the service-oriented architecture. The most important aspect of the solutions is that they do not require expensive products and can be implemented on a regular WebLogic platform.

Acknowledgements
Many thanks go to Bruce Horner and Manmeet Ahluwalia for their significant contributions into the reliability design.

References

More Stories By Michael Poulin

Michael Poulin works as an enterprise-level solution architect in the financial industry in the UK. He is a Sun Certified Architect for Java Technology, certified TOGAF Practitioner, and Licensed ZapThink SOA Architect. Michael specializes in distributed computing, SOA, and application security.

Comments (1) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
SYS-CON Australia News Desk 01/13/06 02:25:23 PM EST

This article describes two techniques that may be used for assured delivery of important data, specifically, audit data, in distributed systems. We will review design that leads from assured to guaranteed delivery. This task gets more and more important in light of modern global operation risk regulations and related application risk management.

@ThingsExpo Stories
DX World EXPO, LLC, a Lighthouse Point, Florida-based startup trade show producer and the creator of "DXWorldEXPO® - Digital Transformation Conference & Expo" has announced its executive management team. The team is headed by Levent Selamoglu, who has been named CEO. "Now is the time for a truly global DX event, to bring together the leading minds from the technology world in a conversation about Digital Transformation," he said in making the announcement.
"Space Monkey by Vivent Smart Home is a product that is a distributed cloud-based edge storage network. Vivent Smart Home, our parent company, is a smart home provider that places a lot of hard drives across homes in North America," explained JT Olds, Director of Engineering, and Brandon Crowfeather, Product Manager, at Vivint Smart Home, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Events announced today that Conference Guru has been named “Media Sponsor” of the 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. A valuable conference experience generates new contacts, sales leads, potential strategic partners and potential investors; helps gather competitive intelligence and even provides inspiration for new products and services. Conference Guru works with conference organizers to pass great deals to gre...
The Internet of Things will challenge the status quo of how IT and development organizations operate. Or will it? Certainly the fog layer of IoT requires special insights about data ontology, security and transactional integrity. But the developmental challenges are the same: People, Process and Platform. In his session at @ThingsExpo, Craig Sproule, CEO of Metavine, demonstrated how to move beyond today's coding paradigm and shared the must-have mindsets for removing complexity from the develop...
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, led attendees through the exciting evolution of the cloud. He looked at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering m...
"Evatronix provides design services to companies that need to integrate the IoT technology in their products but they don't necessarily have the expertise, knowledge and design team to do so," explained Adam Morawiec, VP of Business Development at Evatronix, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. In his session at @BigDataExpo, Jack Norris, Senior Vice President, Data and Applications at MapR Technologies, reviewed best practices to ...
Widespread fragmentation is stalling the growth of the IIoT and making it difficult for partners to work together. The number of software platforms, apps, hardware and connectivity standards is creating paralysis among businesses that are afraid of being locked into a solution. EdgeX Foundry is unifying the community around a common IoT edge framework and an ecosystem of interoperable components.
Large industrial manufacturing organizations are adopting the agile principles of cloud software companies. The industrial manufacturing development process has not scaled over time. Now that design CAD teams are geographically distributed, centralizing their work is key. With large multi-gigabyte projects, outdated tools have stifled industrial team agility, time-to-market milestones, and impacted P&L stakeholders.
"Akvelon is a software development company and we also provide consultancy services to folks who are looking to scale or accelerate their engineering roadmaps," explained Jeremiah Mothersell, Marketing Manager at Akvelon, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
"IBM is really all in on blockchain. We take a look at sort of the history of blockchain ledger technologies. It started out with bitcoin, Ethereum, and IBM evaluated these particular blockchain technologies and found they were anonymous and permissionless and that many companies were looking for permissioned blockchain," stated René Bostic, Technical VP of the IBM Cloud Unit in North America, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventi...
In his session at 21st Cloud Expo, Carl J. Levine, Senior Technical Evangelist for NS1, will objectively discuss how DNS is used to solve Digital Transformation challenges in large SaaS applications, CDNs, AdTech platforms, and other demanding use cases. Carl J. Levine is the Senior Technical Evangelist for NS1. A veteran of the Internet Infrastructure space, he has over a decade of experience with startups, networking protocols and Internet infrastructure, combined with the unique ability to it...
22nd International Cloud Expo, taking place June 5-7, 2018, at the Javits Center in New York City, NY, and co-located with the 1st DXWorld Expo will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud ...
"Cloud Academy is an enterprise training platform for the cloud, specifically public clouds. We offer guided learning experiences on AWS, Azure, Google Cloud and all the surrounding methodologies and technologies that you need to know and your teams need to know in order to leverage the full benefits of the cloud," explained Alex Brower, VP of Marketing at Cloud Academy, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clar...
Gemini is Yahoo’s native and search advertising platform. To ensure the quality of a complex distributed system that spans multiple products and components and across various desktop websites and mobile app and web experiences – both Yahoo owned and operated and third-party syndication (supply), with complex interaction with more than a billion users and numerous advertisers globally (demand) – it becomes imperative to automate a set of end-to-end tests 24x7 to detect bugs and regression. In th...
"MobiDev is a software development company and we do complex, custom software development for everybody from entrepreneurs to large enterprises," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Coca-Cola’s Google powered digital signage system lays the groundwork for a more valuable connection between Coke and its customers. Digital signs pair software with high-resolution displays so that a message can be changed instantly based on what the operator wants to communicate or sell. In their Day 3 Keynote at 21st Cloud Expo, Greg Chambers, Global Group Director, Digital Innovation, Coca-Cola, and Vidya Nagarajan, a Senior Product Manager at Google, discussed how from store operations and ...
"There's plenty of bandwidth out there but it's never in the right place. So what Cedexis does is uses data to work out the best pathways to get data from the origin to the person who wants to get it," explained Simon Jones, Evangelist and Head of Marketing at Cedexis, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
SYS-CON Events announced today that Telecom Reseller has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. Telecom Reseller reports on Unified Communications, UCaaS, BPaaS for enterprise and SMBs. They report extensively on both customer premises based solutions such as IP-PBX as well as cloud based and hosted platforms.