DB2 REST API and z/os Connect SQL/Stored Procedures Play a Role in Mobile and API Economics

Transcription

1 DB2 REST API and z/os Connect SQL/Stored Procedures Play a Role in Mobile and API Economics Maryela Weihrauch IBM Distinguished Engineer z Systems Analytics WW Technical Sales and Client Champion

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4 What to Expect Understand the current trend of API economics Learn how z/os Connect provides a consistent REST(JSON) interface into z/os Learn how DB2 exploits z/os Connect to REST(JSON) enable SQL and Stored Procedures

5 API Economy the Bigger Picture

6 Brief History of APIs source:

7 APIs the Building Blocks for Apps

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9 Provider Benefits Expanding into new customer base and niches that you normally wouldn t be able to reach on your own Focusing on core value Easier possibilities in establishing new partnerships and capitalizing on them Benefitting from open innovations of crowdsourcing and expert sourcing which are implicitly unlocked through the opening of APIs Realize profit from new business models Decreasing development costs and time through software produced by third parties Keeping up with application demand (new apps, new features)

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11 Benefits for Application Assemblers Quick time to market by using existing assets and services to decrease cost and speed up product and service development Driving innovation by capitalizing on the merging of capabilities provided by different APIs Attracting clients to your products and services by joining other (established) API ecosystems Potentially having freedom of choice in terms of available APIs Focus on core competence and value add rather than re-inventing common capabilities Innovate around business models and reach new customers from the provider s ecosystem

12 z/os Connect Enterprise Edition (EE) V2.0 Provides System APIs creation for z/os subsystem applications Delivers RESTful APIs as a discoverable, first-class resource with OpenAPI Spec (Swagger 2.0) descriptions Ready for consumption by today's enterprise application developers and integration with API management solutions Swagger specification API API API CICS IMS WebSphere DB2 Comprehensive tooling that enables API developers to create RESTful MobileFirst APIs from z/os-based assets Platform (cloud) Supports standard JSON message format and conversion to z/os subsystem backend format requirements z/os Connect EE 12

13 IBM z/os Connect Enterprise Edition V2.0 Simplified Overview of REST/JSON REST Client POST /account/deposit GET /account/balance { } "account" : "12345" "amount" : "100.00" REST Listener CICS, IMS, DB2, or wherever account data is maintained Response REST - Representational State Transfer... which uses HTTP and HTTP verbs to allow a client to interact with a server over the TCP/IP network. JSON - JavaScript Object Notation... a name/value pair representation of data that is relatively lightweight and generally simpler to handle and parse than XML. REST is increasingly popular as an integration pattern because it is stateless, relatively lightweight, is relatively easy to program 13

14 z/os Connect EE Structure Today CICS Embedded or as started task IMS Via IMS Connect REST JSON z/os Connect EE Service Provider DB2 (z/os Connect V1) REST Type 2 or 4 JDBC Such as a WAS z/os server hosting REST or 3 rd party Task Batch using WOLA APIs to host a service MQ* (beta) Data Conversion Discovery Function Audit Function Logging Function Granular Authorization * 14

15 z/os Connect Discovery Function 15

16 DB2 Adapter for z/os Connect 1.1

17 DB2 Adapter for z/os Connect Overview DB2 Adapter for z/os Connect is an integrated solution that enables developers to make existing DB2 assets SQL and Stored Procedures available in today s growing mobile and cloud application ecosystem Consists of 3 components WLP with z/os Connect 1.1 license DB2 Adapter for z/os Connect IBM Data Studio, V DB2 Adapter for z/os Connect ships via DB2 Accessories Suite for z/os, V3.3 (5697-Q04) Functionality of DB2 10 and DB2 11 Some WLP skill preferred for install and configuration 17

18 Demo Data Studio tooling for creating and deploying DB2 Adapter for z/os Connect services DB2 REST Service discovery DB2 REST Service invocation

19 Data Studio Tooling for z/os Connect End to End Development z/os Connect DB2 Database operations z/os Connect artifacts Data Web Services of Data Studio (later planned in RDz) Deploy to remote zos Connect z/os Connect on LPAR

20 User Interface 1. Define z/os Connect together with Database connection 2. Define a new service by right click on Web Services folder

21 User Interface 3. Drag n drop 4. Right click to Deploy in z/os Connect Service definitions are deployed in z/os Connect ready to use

22 DB2 Adapter for z/os Connect Architecture z/os Connect address space is coupled with a single DB2 system RESTful WAS Liberty z/os lbuemix CloudOE Java z/os Connect and DB2 Adapter JSON to/from SQL/CALL Via JCC Type2 or Type4 SQL CloudOE Javascript RESTful Data transformation / routing Stored Procedure Mobile/ APIM Security / Auditing / Metering RESTful zconnect A service that encapsulate calling z/os target applications using REST calls. zconnect will support JSON payloads for calls from external cloud or mobilebased clients and will enable the conversion of the payload to the target program's expected format. It will also provide the response payload conversion from a byte array into JSON format before returning the response to the caller. 22

23 Security and Authorization Consideration DataStudio https https Userid, used to connect to z/os Connect needs admin auth to define a service using DB2Deploy Service. It becomes service owner under which the SQL of the UserService is executed in DB2 Userid, used to connect to z/os Connect needs invoke auth to invoke a UserService. z/os Connect SAF Admin group DB2AdapterDeploy Service SAF Operations group Start/stop service SAF Invoke group UserService1( invokegroup) UserService2( invokegroup).. JCC DB2 Functional Userid to establish a connection to DB2. SQL will be executed under userid of service owner DB2 Trusted Context support will be used to switch from the Functional Userid to the service owner Userid for invoke processing

24 Installation and Configuration The DB2 Adapter for z/os Connect functionality does not run in DB2. Runs under the IBM Liberty Profile for z/os application server runtime environment. Although we will include DB2 Adapter for z/os Connect specific Liberty Profile for z/os server templates to aid in server creation and customization, the installation will easier for someone with some prior WebSphere installation and configuration skills. Much of the customization is performed by modifying the Liberty Profile for z/os server.xml and associated files. Installation and configuration will also require coordination with SAF security administrator to create z/os Connect security groups, etc.

25 Native DB2 RESTful service support DB2 11 NFM Apar PI66828 & PI70477

26 Motivation for Integrated Solution in DB2 DB2 integrated REST API functionality maintaining z/os Connect externals as applicable for Reuse of DDF functionality that provides a highly available, highly scalable and highly serviceable network interface Support of clientinfo fields DDF provides security, auditing, and data transformation as being provided using z/os Connect PERMIT DSN.REST CLASS(DSNR) ID(DB2USER) ACCESS(READ) DDF Rest API would be ready out of the box Allows a database administrator to manage services New catalog table Static execution pattern auth checking, object dependency tracking

27 RESTful Service Support in DB2 Application Data Server Client DRDA DDF DRDA parsing DB2 z/os Auth check z/os Connect EE REST API https and JSON parsing Thread Creation/ SQL execution REST API REST API RESTful JSON

28 Native DB2 REST API Support Create DROP START STOP Service using either Data Studio v1 support, or direct DB2 DDF REST API Sample POST {"requesttype": "createservice«...} Discover all services and discover details for a specific service using direct DB2 DDF REST API POST { ["collectionid": "<collectionid>"] DB2 REST Service invocation. DB2 Adapter for z/os Connect V1 invocation API syntax New direct DB2 DDF REST invoke API. Supported INSERT, UPDATE, DELETE and cursor based SELECT CALL support with IN/OUT/INOUT parameters und resultsets All of the various DB2 base SQL types 29

29 References/Blogs to read The easiest way on the planet to create RESTful Web Services! Setup SSL and client cert authentication (chapter 12) 30

30 Maryela Weihrauch IBM Session A6 Title DB2 Adapter for z/os Connect SQL/Stored Procedures Play a Role in Mobile and API Economics Please fill out your session evaluation before leaving!