IBM i Application Development Strategy

Transcription

1 IBM i Application Development Strategy Tim Rowe Application Business Architect, Development Environments, IBM i Development New Development Paradigms Graphical User Experiences Grown from GUIs to Experiences Agile Development Work in highly collaborative groups Time line is strict Small adaptive modules Framework Development Consistency in code creation Component based Model View Controller Agile Services Orientation Componentized code Business based Distributed function 2 1

2 Services Orientation - SOA Modular Reusable Loosely Coupled Standards based Services Directory 3 Application Development in the Power Market SOA 4 2

3 Application Development Strategy for IBM i High performance compilers reaching to new technologies Compilers Common developer desktop across operating systems and languages Common development infrastructure for Power and the world around Power Embrace Open Source Solutions and Partners to Complete Application Development Portfolio 5 Compilers for Optimized Performance Compilers tightly integrated with operating systems and POWER7 hardware Binary compatibility Applications will move to POWER7 with no recompile required S/36 and S/38 environment applications also Rational Open Access: RPG Edition - new offering for RPG Long requested feature from customers and partners 6 3

4 i Architecture Language Runtimes (RPG, COBOL, C, C++) Optimizes underlying IBM i and hardware Single Level Store Object Based Architecture Automates & optimizes storage management Integration Enables integrity, security, virus-resistance Work Management Integrates business components, e.g. database Provides built-in application virtualization Technology Independent Machine Interface Ensures application compatibility across multiple technology generations Multi-core Multi-threads 7 Commitment to RPG and COBOL Hayden Lindsey Vice President and Distinguished Engineer Enterprise Modernization, Modeling, Construction and Compilers IBM Rational 8 4

5 Compilers on IBM i Rational Development Studio RPG, COBOL, C, and C++ compilers for IBM i Previously called WDS: WebSphere Development Studio for System i Designed for creating modern business applications WebSphere Development Studio for IBM i Rational Development Studio for i 5770-WDS New Enhancements Feature: ILE Compilers ILE RPG ILE RPG *PRV Compiler ILE COBOL ILE COBOL *PRV Compiler ILE C ILE C++ IXLC for C/C++ Stabilized Feature: Heritage Compilers S/36 Compatible RPG II S/38 Compatible RPG II RPG/400 (RPG III)_ S/36 Compatible COBOL S/38 Compatible COBOL OPM COBOL Stabilized Feature: ADTS PDM SEU SDA RLU 9 RPG IV Goals for the Language Three main goals for RPG IV Interoperability Java XML SQL Readability Free form Blank lines Comments Functionality Procedures Data areas/data structures More data types Extended file support 10 5

6 Modern RPG /FREE read file; // Get next record dow not %eof(file); // Keep looping while we have a record if %error; dsply The read failed ; leave; else; chain(n) name database data; time = hours * num_employees + overtime_saved; pos = %scan (, : name); name = %xlate(upper : lower : name); exsr handle_record; read file; endif; enddo; begsr handle_record; eval(h) time = time + total_hours_array (empno); temp_hours = total_hours - excess_hours; record_transaction(); endsr; /end-free 11 ILE RPG enhancements New and updated built-in functions %LEN, %SCANRPL, %PARMNUM Implicit unicode conversion for parameters Sort and search data structures Sort Ascend or descend Performance when returning large values Optional prototypes Support for ALIAS names in externally-described data structures New options for XML-INTO (also available with a PTF for 6.1) Support for Open Access RPG Edition (also available with a PTF for 6.1) 12 IBM Confidenti 6

7 Rational Open Access: RPG Edition Extending RPG to reach new interfaces <?xml?> XML Interfaces Custom Devices Future Devices Rich Clients RPG IV + Open Access Mobile Browsers SOA Interface Web Browsers Databases Rational Open Access: RPG Edition *DSPF example 5250 Screens RPG Application WRITE record program I/O buffer Other information: state names pointers Display file object * DSPF 5250 datastream RPG Runtime Display Manager 14 IBM i 7

8 Rational Open Access: RPG Edition *DSPF example? RPG Application Handler code to manage building the interface and proprietary information Handler Defined WRITE record program I/O buffer Other information: state names pointers RPG Runtime Display Manager 15 IBM i IBM i Open Source Strategy Encourage Open Source vendors to port to IBM i (PASE) Encourage Open Source vendors to provide support PHP and MySQL run on IBM i IBM i PASE Development Team is testing other Open Source products 16 8

9 Over one-third of the Web runs on PHP Open Source Solutions for i Zend Server Community Edition for i Preloaded with IBM i 7.1, 6.1, 5.4 Zend Server for i Provides advanced functions Available from IBM with advanced support offerings Zend Studio for i Eclipse-based development environment Available with one year of Silver support from Zend for no additional charge Other Open Source Products: DB2 Community Edition 18 9

10 Modernization on IBM i with PHP Leverage Existing Infrastructure to Develop & Run Dynamic Web Applications Easily Expose part of RPG Application New/Packaged Web Application on IBM i Access DB2/400 Data via Browser Access RPG Programs & Data as Web Services Modernizing IBM I legacy applications with PHP Sep-11 IBM Corporation 19 New Application Development Support Web Services New client support WSDL2RPG - Delivered 12/10 Call Web Services natively from RPG WSDL converted to native RPG to encapsulate Web Service call Web Service Native calls! Zend PHP New IBM i PHP Toolkit GA EOY 2011 Call *PGM, *SVRPGM, *CMD, PASE utilities Enhanced Database support May 2011 Local DB support for MySQL, DB2 Remote DB support for MsSQL, Oracle DB2 Oracle Remote DB Connection 20 IBM/Zend PHP Toolkit MySQL MsSQL 10

11 PHP Integration with i - ToolKit Easy access to IBM i data and resources from PHP (similar to IBM ToolBox for Java) DB2 for i SQL and Native Program call Procedure call Data Area Data Queue Message Queue Commands System values Spool files 21 XMLSERVICE RAW XML PHP Interfaces The basic idea of XMLSERVICE is to allow any scripting language to use XML input/output documents to drive XMLSERVICE job(s) calling PGMs, SRVPGMS, CMDs, PASE shells. Call ILE or shell scripts from local PHP OR remote PHP environment XML based 22 11

12 Leveraging Open Source Application Portfolio Customer Relationship Management Help Desk Portal Portal Portal Course Management System e-commerce Wiki Bulletin Board Content Management System 23 Rational Developer for Power Systems Software 24 Rational Developer for Power V8.0 RPG and COBOL for IBM i COBOL for AIX C/C++ for AIX C/C++ for Linux on Power C/C++ Development Studio for AIX COBOL Development Studio for AIX Power Tools for AIX Power Tools for IBM i Power Tools for Linux on Power Linux Desktop Support IBM XL C/C++ for AIX and Linux V11.1 IBM XL Fortran for AIX and Linux V13.1 IBM COBOL for AIX V4.1 IBM PL/I for AIX V2 IBM Rational Development Studio V7.1 IBM i compilers Rational Open Access: RPG Edition V

13 Rational Developer for Power: RPG and COBOL Remote System Explorer (RSE) Perspective for access to remote IBM i servers Reusable actions, dialogs, widgets, APIs Editor for traditional IBM i application code RPG, COBOL, C, C++, Java & DDS Interface to the compilers Debugger Multi-language 25 Productivity & Innovation why its important Productivity: The measure of output from a process, such as output per labor-hour. Higher Profit More Higher Output Profit Cost More Effectiveness Output Application Modernization Growth Job Satisfaction Growth Accelerate Innovation 20% Boost In developer Productivity 1 ¹ Based on IBM customer study, Making a Business Case for IBM Rational Developer for i 26 13

14 Why RD Power? Developer View (the fun stuff!) Modern, Eclipse-based, development tools for IBM i Visual editors, outline views, content assist, integrated language help Integrated file management, search, edit, compile/build, debug capabilities Analysis tools (application diagram, call hierarchies, type hierarchies) Easily debug batch, interactive, and Web applications and Web services with a common visual debugger Visual DDS design tools: Screen and Report Designer Integration with Rational Team Concert 27 Show me the features Remote Systems LPEX Editor 28 Copyright 2011 IBM Corporation 28 14

15 From this PDM & SEU the editor 29 Copyright 2011 IBM Corporation 29 To this Best of Both Worlds SEU look and feel Prefix commands Format bar Modern look and feel Colors! Modern editor features 30 Shortcut to open a member, Ctrl + Shift + A Copyright 2011 IBM Corporation 30 15

16 Undo / Redo * means editor has unsaved changes Number of changes made since last save. Unlimited undo / redo inside of LPEX editor Undo changes right back to when member was originally opened Even if editor was saved during the editing period Edit > Undo Redo or use more common keyboard shortcuts Ctrl + Z Ctrl + Y 31 Copyright 2011 IBM Corporation 31 Copy and Paste Block copy / paste Prefix commands for copy / paste Stream based copy / paste (typical of Workstation software) Uses Windows Clipboard, paste into another editor, , or document editor. 32 Copyright 2011 IBM Corporation 32 16

17 Outline View and Content Assist Cross reference information Content assist helps jog your memory (opcodes, BIFs, fields) 33 Templates provide a quick way to insert common code patterns (free form and SQL). Predefined or define your own! Copyright 2011 IBM Corporation 33 From this Compile Errors 34 Copyright 2011 IBM Corporation 34 17

18 Launch compiles directly from editor or pop-up menu. To This Compile errors automatically downloaded and shown in Error List 35 Double clicking on an error opens editor and positions to the line Copyright 2011 IBM Corporation 35 From this Application Diagram??? 36 Copyright 2011 IBM Corporation 36 18

19 Application Diagram Subroutine ChgOrder calls something inside the ROUTINES member ORDENTR member expanded to to view view a call call graph graph Subroutine RqsPart calls subroutine Process Subroutine WrtDtaQ calls program QSNDDTAQ 37 Copyright 2011 IBM Corporation 37 Application Diagram Application Diagram Provides developers with a graphical overview of the structure of their native i5/os applications Call graph showing subroutine, procedure, and program calls ILE program and service program bindings Currently supports ILE RPG, ILE COBOL, CL, programs and service programs 38 Copyright 2011 IBM Corporation 38 19

20 From this Build DDM Screens 39 Copyright 2011 IBM Corporation 39 Screen Designer Screen controls allow you to specify which records should be visualized together in the design area. Outline view for navigating in the editor and selecting the file, records and fields. Report Designer & Design, source and preview modes Design area Palette: drag and drop parts from the palette to the design area. Use properties view to modify attributes and keywords for the file, records and fields. 40 Copyright 2011 IBM Corporation 40 20

21 From this Integrated Debugger 41 Copyright 2011 IBM Corporation 41 Debug View controls the debugger Work with breakpoints (enable / disable, remove, add, conditional) Real time monitoring of the field values Breakpoint (set / remove by double clicking) 42 Copyright 2011 IBM Corporation 42 21

22 Launching the Debugger One Click Actions Attach to a job (STRSRVJOB) Always use Service Entry Points to debug any ILE program / service program! Single click debug for batch (don t use for interactive use service entry points or debug job) 43 Copyright 2011 IBM Corporation 43 JVM Improves Java Performance V5R4 GA V6R1 GA Transactions per Second Native JDBC +68% +78% Toolbox JDBC IBM 32-bit & 64-bit Java Virtual Machine Shared technology with AIX & Linux improves performance & portability Exceptional Java environment and performance. Built by IBM for Power Fully compatible with other industry standard Java applications Can be called by APIs or directly from RPG IBM Java ToolBox Pre-coded Java classes to access native IBM i artifacts files, data queues, etc 44 22

23 IBM Rational Application Developer (RAD) Eclipse-based Java development environment Full support for J2EE, web, web services, etc 45 Rational Application Developer Standard Edition Java Web Development tool Use RAD SE to build rich Java internet applications improve online user experience increase customer satisfaction Visual development for Web 2.0 significant productivity benefits Award winning! 2009 Evans Data Users Choice: Software Development 46 23

24 New RPG stuff for IBM i 7.1 the Details.. 47 IBM Confidenti RPG: %LEN(varying : *MAX) Problem solved by %LEN(*MAX): Starting in V6R1, calculations involving the size of the varying-length prefix became error-prone because the size might be either 2 or 4. In V6R1, %ADDR was enhanced with %ADDR(*DATA) to simplify getting the address of the data part. Previously, programmers added 2 to %ADDR. %LEN(*MAX) simplifies getting the maximum length of the data part. Previously, programmers subtracted 2 from %SIZE, and then divided by 2 for UCS-2 and DBCS. Get the maximum number of characters for a varying field. D char_varying S 5000A VARYING /free // Pass address and length of the data conv (%addr(char_varying : *data) : %len(char_varying : *max)); 48 IBM Confidenti 24

25 RPG: New built-in function %SCANRPL Problem solved by %SCANRPL: Hand-written versions of scan-and-replace tend to be large, error prone, and difficult to maintain. The %SCANRPL built-in function replaces all occurrences a string with another string. fileerr = File &1 not found. Please create &1. ; msg = %scanrpl ( &1 : filename : fileerr); // msg = File MYFILE not found. Please create MYFILE. 49 IBM Confidenti RPG: New built-in function %PARMNUM Problem solved by %PARMNUM: Parameter-information APIs such as CEEDOD or CEETSTA require a parameter s number. The %PARMNUM built-in function returns a parameter s position in the parameter list. Soft-coding the parameter s number makes the code easier to read and maintain. D myproc pi 10A OPDESC D company 25A OPTIONS(*VARSIZE) D city 25A OPTIONS(*VARSIZE) CEEDOD (2 : more parms); // hard to understand CEEDOD (%PARMNUM(city) : more parms); // better 50 IBM Confidenti 25

26 RPG: Implicit CCSID conversion - parms Implicit CCSID conversion is now supported for prototyped parameters passed by VALUE and by read-only reference (CONST) This reduces the number of code changes that have to be made when a database field is changed from alphanumeric or DBCS to Unicode (UCS-2 or UTF-16). Prior to this change, if the type (A, C or G) of a passed parameter was not the same as the prototype, the compiler would issue a diagnostic. With this change, the compiler will implicitly convert the passed parameter to the type of the prototype. In the example below, there is only one maketitle procedure with a UCS-2 parameter and return value. If the passed parameter is alpha or DBCS, it will be converted to UCS-2 on the call. The procedure will work with the UCS-2 parameter and return a UCS-2 value. This returned value can then be converted on assignment to alpha or DBCS, if necessary. // maketitle() upper-cases the parameter // and centers it within the provided length alphatitle = maketitle(alphavalue : 50); ucs2title = maketitle(ucs2value : 50); dbcstitle = maketitle(dbcsvalue : 50); 51 IBM Confidenti Sort & Search SORT AND SEARCH DATA STRUCTURE ARRAYS: To sort or search a data structure array, one subfield is identified as the "key" for the array, using the syntax ARRAY(*).KEYSUBFIELD. Example: Sort the INFO array by the SALARY subfield and search for the name. Note that 'Jack' in the NAME subfield of the INFO array. Sort a data structure array using one subfield as a key // sort by name SORTA info(*).name; // sort by due date SORTA info(*).duedate; Search a data structure array using one subfield as a key // search for a name pos = %LOOKUP( Jack : info(*).name); // search for today s date pos = %LOOKUP(%date() : info(*).duedate); 52 26

27 RPG: Sort and search data structure arrays The (*) index identifies the array to be sorted. Any other arrays in the expression must have a numeric index. The subfields preceding the (*) index indicate the array to be sorted. The subfields following the (*) array represent the key to be searched or sorted. // sort family array by age of first child SORTA family(*).child(1).age; // sort child array in each family by age for i = 1 to numfamily; SORTA family(i).child(*).age; endfor; 53 IBM Confidenti RPG: Sort ascending or descending Non-sequenced arrays can be sorted either ascending or descending. Extender indicates a descending sort. Extender indicates ascending (default). D meetings S D DIM(100) /free // sort descending, with the // most recent date first sorta(d) meetings; 54 IBM Confidenti 27

28 RPG: Performance returning large values RTNPARM keyword greatly improves performance when a procedure returns a large value The speed of using a parameter with the convenience of using a return value Especially noticeable when the prototyped return value is a large varying length value D center pr a varying D rtnparm D text 50000a const varying D len 10i 0 value D title s 100a varying /free title = center ('Chapter 1' : 60); 55 IBM Confidenti RPG: Optional prototypes If a program or procedure is not called by another RPG module, it is optional to specify the prototype. These are some of the programs and procedures that do not require an RPG prototype An exit program, or the command-processing program for a command A program or procedure that is never intended to be called from RPG A procedure that is not exported from the module 56 IBM Confidenti 28

29 RPG: Optional prototypes Here is an RPG module with a main procedure and a subprocedure. No prototypes are necessary. H main(hello) P hello b D pi extpgm('hello') D name 10a const /free sayhello();... P sayhello b /free dsply ('Hello ' + name); RPG: Support for ALIAS names Background Fields in externally described files can have a standard name up to 10 characters and an alternate (ALIAS) name up to 128 characters. RPG III only allowed 6 characters, so many customers have files with cryptic names like CUSNAM, CUSADR. The files often have alternate names such as CUSTOMER_NAME and CUSTOMER_ADDRESS, that can be used in SQL queries. RPG programmers would like to use the alternate names in their RPG programs. New ALIAS keyword for RPG When ALIAS is specified, RPG will use the alternate name instead of the 10-character standard name. Supported on F specs for any file that will not have Input or Output specs generated. Used for LIKEREC data structures. Supported on D specs for any externally-described data structure. A R CUSTREC A CUSTNM 25A ALIAS(CUSTOMER_NAME) A CUSTAD 25A ALIAS(CUSTOMER_ADDRESS) A ID 10P 0 D custds e ds ALIAS D QUALIFIED EXTNAME(custFile) /free custds.customer_name = 'John Smith'; custds.customer_address = '123 Mockingbird Lane'; custds.id = 12345; 58 IBM Confidenti 29

30 RPG XML-INTO: new option datasubf The new datasubf option enables XML-INTO to support XML elements in this form <emp type= regular id= >John Smith</emp> Problem solved by datasubf: When an XML element has attributes or child elements, the XML element (emp) itself matches an RPG data structure and the attributes (type, id) match the subfields. (Child elements would also match subfields.) If there is text data for the data structure ( John Smith ), there is no XML name available for subfield matching. Without the datasubf option, two XML-INTO operations would be needed to get the data from that XML element. One XML-INTO would get the type and id values One XML-INTO would get the value John Smith The allowextra=yes option would be needed for both XML-INTOs 59 IBM Confidenti RPG XML-INTO: datasubf example <emp type= regular id= >John Smith</emp> RPG coding to get the information with one XML-INTO operation: D emp ds D id 7p 0 D type 10a D value 100a /free XML-INTO emp %xml( emp.xml : : datasubf=value doc=file ); // emp.id = // emp.type = regular // emp.value = John Smith 60 IBM Confidenti 30

31 RPG XML-INTO: new option countprefix The new countprefix option enables RPG programmers to get more information about an XML document using XML-INTO. Problem solved by countprefix: When an XML element has a variable number repeating elements, it matches an RPG array. The RPG programmer has to code the maximum elements for the RPG array, but the XML document will usually have fewer elements. Without the countprefix option, The allowmissing=yes option would be required, also allowing other necessary data to be missing The RPG programmer would have to figure out how many XML elements there were by looking for some default value. 61 IBM Confidenti RPG XML-INTO: countprefix The countprefix option gives the prefix for the subfields to receive the count of the number of XML elements used to fill the RPG array. <team> <manager>jack Spratt</manager> <emp>john Smith</emp> <emp>mary Jones</emp> </team> The RPG data structure. D team DS D manager 25A D emp 25A dim(100) D numemp 10i 0 No "numemp" tag in the XML for subfield "numemp". 62 IBM Confidenti 31