IBM Systems Magazine, Mainframe - September/October 2016 - 28

resource with query parameters and action verbs such as GET, PUT and DELETE-with JSON payload. A macro API call, such as /getCustomerDetail, can be decomposed into several microservices, including /getCustomer, /getAccounts, /getBalances, /getCreditScore, /getCards and /getLoans. The orchestration layer can combine the results to return the response for the macro API. Many core components of systems of integration (see Figure 1, right) enable this microservices architecture. A catalog of macroservices provides API access to business services using a RESTful interface. Creating, publishing, socializing, managing the API lifecycle, metering, billing and governance of these services can be managed in this layer. Applications running in SoEs request these services and, based on their predefined service level agreement, obtain responses in a prioritized fashion. The application layer consists of a component assembly layer that provides orchestration by composing the macro API call from the catalog using a list of microservices that are then served by the SoR APIs or reference data (master data management) APIs. The compensation layer provides transaction integrity so that if any of the microservices fail to return a response, a rollback action is executed to revert the back end to a consistent state. The data layer hub provides an interface to send the microservice RESTful requests straight to the SoRs that are served by IBM z/OS* Connect Enterprise Edition (zCEE). zCEE works on the Liberty profile that runs mostly in specialty z Systems* Integrated Information Processors, co-located with the SoRs. It does the heavy lifting of convert- Figure 1: Systems of Integration Figure 2: Benefits of Caching for a Banking Workload ing native connection requests to z/OS middleware (e.g., CICS*, IMS* and DB2*) and batch to RESTful APIs with Swagger 2.0 support and JSON payloads. It also provides caching functionality of the microservices served by IBM WebSphere* eXtreme Scale to ensure prefetched responses have been stored in the cache from prior calls. These calls can be directly returned from the midtier, providing resource savings and response time benefits. The content in the cache can have a predefined expiration interval and be automatically flushed and repopulated on the next API call. 28 // SEPTEMBER/OCTOBER 2016 ibmsystemsmag.com For regulatory purposes, audit trails must be maintained for all create, read, update and delete transactions implemented through the microservice API calls. An innovative use of blockchain is implementing a security-as-a-service layer. The immutable chain is a great data structure for audit trail data stored in a SoftLayer* public cloud using an encrypted IBM Cloud Object Storage powered by Cleversafe* technology. The metadata for audit trails, such as hash IDs of the sequence, the time stamp and the block ID, can be stored on-premises using DB2 z/OS in the highly secured SoR tier. http://www.ibmsystemsmag.com

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - September/October 2016

Table of Contents
Editor's Desk: Mitigating money matters
IBM Perspective: Linux on z Systems provides financial industry a foundation for blockchain
Partner PoV: Virtualization helps improve time to market and data center operations
IT Today: Blockchain's potential extends beyond the financial industry
Case Study: The Right Tools: Educational Testing Service streamlines application calls and improves PCI compliance
Cover Story: Process Transformation: Blockchain brings speed, security and transparency to business
Feature: A Modern System: IBM midtier solutions exploit API and microservices to drive innovation
Special Report: Mainframe Security Survey: Unauthorized users and external hackers are top concerns cited in survey
Tech Corner: Create a DevOps pipeline for Java applications in CICS
Solutions: zVT Control Center, dbDefender DAM Agent for DB2
Stop Run: IBM software engineer balances his day job with acting
Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - September/October 2016 - Intro
IBM Systems Magazine, Mainframe - September/October 2016 - Cover1
IBM Systems Magazine, Mainframe - September/October 2016 - Cover2
IBM Systems Magazine, Mainframe - September/October 2016 - 1
IBM Systems Magazine, Mainframe - September/October 2016 - Table of Contents
IBM Systems Magazine, Mainframe - September/October 2016 - 3
IBM Systems Magazine, Mainframe - September/October 2016 - 4
IBM Systems Magazine, Mainframe - September/October 2016 - 5
IBM Systems Magazine, Mainframe - September/October 2016 - Editor's Desk: Mitigating money matters
IBM Systems Magazine, Mainframe - September/October 2016 - 7
IBM Systems Magazine, Mainframe - September/October 2016 - IBM Perspective: Linux on z Systems provides financial industry a foundation for blockchain
IBM Systems Magazine, Mainframe - September/October 2016 - 9
IBM Systems Magazine, Mainframe - September/October 2016 - Partner PoV: Virtualization helps improve time to market and data center operations
IBM Systems Magazine, Mainframe - September/October 2016 - 11
IBM Systems Magazine, Mainframe - September/October 2016 - 12
IBM Systems Magazine, Mainframe - September/October 2016 - IT Today: Blockchain's potential extends beyond the financial industry
IBM Systems Magazine, Mainframe - September/October 2016 - 14
IBM Systems Magazine, Mainframe - September/October 2016 - 15
IBM Systems Magazine, Mainframe - September/October 2016 - Case Study: The Right Tools: Educational Testing Service streamlines application calls and improves PCI compliance
IBM Systems Magazine, Mainframe - September/October 2016 - 17
IBM Systems Magazine, Mainframe - September/October 2016 - 18
IBM Systems Magazine, Mainframe - September/October 2016 - 19
IBM Systems Magazine, Mainframe - September/October 2016 - Cover Story: Process Transformation: Blockchain brings speed, security and transparency to business
IBM Systems Magazine, Mainframe - September/October 2016 - 21
IBM Systems Magazine, Mainframe - September/October 2016 - 22
IBM Systems Magazine, Mainframe - September/October 2016 - 23
IBM Systems Magazine, Mainframe - September/October 2016 - 24
IBM Systems Magazine, Mainframe - September/October 2016 - 25
IBM Systems Magazine, Mainframe - September/October 2016 - Feature: A Modern System: IBM midtier solutions exploit API and microservices to drive innovation
IBM Systems Magazine, Mainframe - September/October 2016 - 27
IBM Systems Magazine, Mainframe - September/October 2016 - 28
IBM Systems Magazine, Mainframe - September/October 2016 - 29
IBM Systems Magazine, Mainframe - September/October 2016 - 30
IBM Systems Magazine, Mainframe - September/October 2016 - Special Report: Mainframe Security Survey: Unauthorized users and external hackers are top concerns cited in survey
IBM Systems Magazine, Mainframe - September/October 2016 - 32
IBM Systems Magazine, Mainframe - September/October 2016 - 33
IBM Systems Magazine, Mainframe - September/October 2016 - 34
IBM Systems Magazine, Mainframe - September/October 2016 - 35
IBM Systems Magazine, Mainframe - September/October 2016 - 36
IBM Systems Magazine, Mainframe - September/October 2016 - 37
IBM Systems Magazine, Mainframe - September/October 2016 - 38
IBM Systems Magazine, Mainframe - September/October 2016 - 39
IBM Systems Magazine, Mainframe - September/October 2016 - 40
IBM Systems Magazine, Mainframe - September/October 2016 - 41
IBM Systems Magazine, Mainframe - September/October 2016 - Tech Corner: Create a DevOps pipeline for Java applications in CICS
IBM Systems Magazine, Mainframe - September/October 2016 - 43
IBM Systems Magazine, Mainframe - September/October 2016 - 44
IBM Systems Magazine, Mainframe - September/October 2016 - 45
IBM Systems Magazine, Mainframe - September/October 2016 - Solutions: zVT Control Center, dbDefender DAM Agent for DB2
IBM Systems Magazine, Mainframe - September/October 2016 - 47
IBM Systems Magazine, Mainframe - September/October 2016 - Stop Run: IBM software engineer balances his day job with acting
IBM Systems Magazine, Mainframe - September/October 2016 - Cover3
IBM Systems Magazine, Mainframe - September/October 2016 - Cover4
IBM Systems Magazine, Mainframe - September/October 2016 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - September/October 2016 - SE1
IBM Systems Magazine, Mainframe - September/October 2016 - SE2
IBM Systems Magazine, Mainframe - September/October 2016 - SE3
IBM Systems Magazine, Mainframe - September/October 2016 - SE4
IBM Systems Magazine, Mainframe - September/October 2016 - SE5
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