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RPG investment

RPG investment



COMMON Europe Congress 2012 - Vienna

COMMON Europe Congress 2012 - Vienna



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    RPG investment RPG investment Document Transcript

    • IBM’s Investment in RPG Past, Present and Future Alison Butterill Power Systems Software © 2010 IBM CorporationIBM Power SystemsDisclaimer Acknowledgement: • This presentation is a collaborative effort of the IBM Toronto AS/400 Application Development presentation team, including work done by: • George Farr, Claus Weiss, Don Yantzi, and Barbara Morris Disclaimer: • The information contained in this document has not been submitted to any formal IBM test and is distributed on an as is basis without any warranty either express or implied. The use of this information or the implementation of any of these techniques is a customer responsibility and depends on the customers ability to evaluate and integrate them into the customers operational environment. While each item may have been reviewed by IBM for accuracy in a specific situation, there is no guarantee that the same or similar results will result elsewhere. Customers attempting to adapt these techniques to their own environment do so at their own risk. Reproduction: • The base presentation is the property of IBM Corporation. Permission must be obtained PRIOR to making copies of this material for any reason. © 2010 IBM Corporation 1
    • IBM Power SystemsCommitment to RPG Hayden Lindsey Vice President and Distriguished Engineer Enterprise Modernization, Modeling, Construction and Compilers IBM Rational © 2010 IBM CorporationIBM Power Systems Agenda Our Investment in RPG IV Highlights from previous releases RPG 7.1 Enhancements Rational Open Access: RPG Edition Future of RPG IV © 2010 IBM Corporation 2
    • IBM Power Systems RPG IV – A Concept Comes Forth Three main goals for RPG IV 1. Interoperability • Java • XML • SQL 2. Readability • Free form • Blank lines • Comments 3. Functionality • Procedures • Data areas/data structures • More data types • Extended file support © 2010 IBM CorporationIBM Power Systems V3R1… RPG IV 1st release • Expanded names • New Definition specification (D-spec) •10 characters allowed •Clear, concise, consistent •Underscore supported •Built in functions •Upper and Lower case source •Most limits raised or remved •More readable, maintainable •Source migration tool provides •Free form expressions •All this and support for ILE •Date and time support RPG CRTRPGMOD *MODULE X Source *PGM PGMA X PRC X *MODULE X *MODULE Y *MODULE Z RPG *MODULE Y CRTPGM... CRTRPGMOD PRC X PRC Y PRC P1 Source MOD(X Y Z) Y PRC Y RPG CRTRPGMOD *MODULE Z Source Z © 2010 IBM Corporation 3
    • IBM Power Systems RPG IV -V3R2/V3R6 • User Defined Procedures • With support for Local variables • Create your own Functions • Free-form CALL • With parameter validation via Prototypes • New Integer Data Types • Signed (I) • Unsigned (U) • Other Enhancements • *CYMD date formats supported on MOVE, MOVEL and TEST (when working with system values that support such format) • Replace option on PREFIX (replace characters in the existing field name with the prefix string. ) © 2010 IBM CorporationIBM Power Systems V3R7… RPG IV • Null field support Test and set null-capable fields • [ %NULLIND(FLD1)=*ON/*OFF ] • New data types Floating point Null terminated strings (%STR) • New Built-In functions String functions • editing (%EDITW, %EDITC, %EDITFLT) • scanning strings (%SCAN) Data type conversions • type conversions (%INT, %FLOAT, %DEC, %UNS) • Type converts with half-adjust ((%INTH, %DECH, %UNSH) • Pointer arithmetic adding an offset to a pointer, subtracting an offset from a pointer determining the difference between two pointers. • Long names longer than 10 characters © 2010 IBM Corporation 4
    • IBM Power Systems V4R2… RPG IV Associate *LGL and INDDS• Indicator Data Type with each WORKSTN file Data areas of type *LGL (logical) that uses INDARA Indicator data structure (INDDS) (instead of *IN array) Built-in functions (%EOF, %EQUAL, %FOUND, %OPEN, as well as %ERROR, %STATUS. Indicator data type (N‘): defines character data in the indicator format.• Varying length Character field. New Data Type New Built-In functions• ‘Permanent’ compiler options Simplifies string handling Use H specification keyword instead of compile options on CRTBNDRPG and CRTRPGMOD• Other enhancements Mixed case procedure and variable names on IMPORT & EXPORT keywords BNDDIR (binding directory) option on CRTRPGMOD Customers Requirements © 2010 IBM CorporationIBM Power Systems V4R4… RPG IV • EVALR • assignment right-adjusts the data within the result. • Free form FOR Loop • iterative loop; allows free-form expressions for initial, increment, and limit • OVERLAY(name : *NEXT) • subfield is positioned at the next available position within overlayed field. • LEAVESR op-code • exit/return from any point within a subroutine • New Built-Ins • %XFOOT sums all elements of a specified array expression • %DIV(n:m) integer division on the two operands n and m • and more… • New Data Types (Java compatibility) • 1-byte and 8-byte integer • Signed (3I, 20I), and unsigned (3U, 20U) • JNI (Calls) • direct call to Java method – technically possible, but difficult. • Thread Safety • THREAD(*SERIALIZE) can run multi-threaded, but serialized access • Unicode • UCS-2 (Unicode) character set © 2010 IBM Corporation 5
    • IBM Power Systems V5R1 •Increasing Java-related support EXTPROC maps to Object (CLASS) methods CLASS keyword on the D spec STATIC keyword for static methods •Free Form C-Specification •Monitor operation group •Runtime control of file/member to be opened EXTFILE(filename) Static name or variable •Date/time/timestamp operations in expressions •ELSEIF Operation instead of nested IFs •Predefined compiler directives •/DEFINE names *VnRnMn, *ILERPG, *CRTBNDRPG *CRTRPGMOD •Qualified names in data structures •More Built-in Functions •%XLATE, %OCCUR, %CHECK, %CHECKR, %ALLOC, %REALLOC, %LOOKUP, etc © 2010 IBM CorporationIBM Power Systems Free Form C-Spec /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 © 2010 IBM Corporation 6
    • IBM Power Systems Qualified Data Structures D cust DS QUALIFIED D name 50a D id_num 10i 0 D part DS QUALIFIED D name 25a D id_num 10i 0 D part1 DS LIKEDS(part) D part2 DS LIKEDS(part) C eval cust.name = ABC Electronics C eval part1.name = Radio C eval part1.id_num = 100035 C eval part2.name = Telephone C eval part2.id_num = 100036 © 2010 IBM CorporationIBM Power Systems V5R2 - Another BIG release • 31 digit support for numerics (DECPREC keyword) • Allow Character parms for the following built-ins: • %DEC, %DECH, %INTH, %UNS, %UNSH, %FLOAT • e.g. %DEC(‘12345.67’ : 7 : 2) create decimal number from‘12345.67’ • Bitwise logical built-in functions (direct bit manipulation) •%BITAND, %BITOR, %BITXOR, %BITNOT • IFS Source File Support • Library qualified access to data areas (not only *LIBL) • Specify selected fields for UPDATE (%FIELDS) •UPDATE record %fields(field1 : field3) • PCML file generation into IFS • I/O enhancements •Externally-described DS can hold I/O/B fields •DS can be specified in result field when using I/O operations to an externally described file •Prior to V5R2 only allowed for program-described files • Short Form Operators Variable1 += Variable2 © 2010 IBM Corporation 7
    • IBM Power Systems V5R3• RPG preprocessing for SQL Preprocessor •handles conditional compilation and nested /COPY• 63 Digit support (Packed and Zoned) • DECPREC (30|31|63)• Second parameter on %TRIMx designated trim characters • trimchars = ‘*-’; data = ‘**-*a-b-c*-*’; result = %trim(data, trimchars); • resulting value is ‘a-b-c’• Allow dynamic resizing of arrays, %SUBARR • %SUBARR(array : start : length) • sorta %subarr(myArray:4:10) sorts 10 elements of myArray starting at 4th:• OPTIONS(*TRIM) on the proc prototype • that parameter is always trimmed of leading and trailing blanks• Conversion of date/time/timestamp to numeric using %DEC •Example: date is DATE type = D’2003-08-21’; numDDMMYY is numeric •numDDMMYY = %dec(date:*dmy) ; numDDMMYY now contains 210803• Relax rules for result data structure •Result DS for I/O to a RECORD format may be externally described DS •Data structure may be specified in result field for I/O to externally-described fiel •CHAIN, READ, READE, READP, READPE• New environment variable for Java method calls (performance enhancement) © 2010 IBM CorporationIBM Power Systems V5R4 Embedded SQL supported in free-format RPG Data structure copy – Evaluate corresponding EVAL-CORR Changed Prefix keyword – removes Prefix from field names on external described structures XML support – New built –ins: • % XML • % Handler – New operation codes • XML-INTO • XML-SAX New prototyped parameter option – OPTIONS(*NULLIND) null-indicators ‘bitmap’ is passed into the procedure. New Debug keyword values – *INPUT, *XMLSAX, *DUMP SEU, add syntax checking for free-form RPG © 2010 IBM Corporation 8
    • IBM Power Systems Embedded SQL in Free Format RPG /free exec sql WHENEVER SQLERROR GOTO handleError; outSqlMsg = *blanks; exec sql SELECT count(*) into :orderCount FROM orders WHERE cust_no = :inCustNumber; return orderCount; /end-free handleError tag /free outSqlState = sqlState; if %subst(sqlState:1:2) <> 00; exec sql GET DIAGNOSTICS CONDITION 1 :outSqlMsg = MESSAGE_TEXT; orderCount = 0; endif; return orderCount; /end-free © 2010 IBM CorporationIBM Power Systems XML Support XML-INTO variable %XML(xml_document) Reads from an XML document into a field, data structure or array First parameter of %XML can be a string actually containing XML data, for example <a>Hello</a>, or it can be the name of an XML file, for example mydata.xml. Second optional operand for %XML specifies indicates weather the first operand is string containing XML data, or an XML file. For example, %XML(xmldata : doc=file) D******************************************************** <info> D info DS Target Field <name>Frank</name> D name 10A D val 5I 0 DIM(2) <val>10</val> D********************************** <val>-5</val> /free </info> MyFile.XML XML-INTO info %XML(myfile.xml : doc=file); // info now has the value // name = ‘Frank // val(1) = 10 // val(2) = -5 Source of XML Options © 2010 IBM Corporation 9
    • IBM Power Systems V6R1 Enhancements Data structure type definitions No more compile-time overrides Defining files locally in subprocedures, and passing files as parameters Significantly higher limits for the size of variables and array elements A new kind of RPG main procedure Relaxation of some UCS-2 rules (available for V5R3/4 through PTFs) Run concurrently in multiple threads; RPG doesn’t have to be a bottleneck © 2010 IBM CorporationIBM Power SystemsNew Options for Overrides History: •Pre-V5R1 many overrides executed at Compile time –externally described files –data structures •EXTFILE in V5R1 –allowed reassigning of file/member/library within the program –not a compile time option V6R1: •New F Spec keywords –EXTDESC for files –EXTNAME enhancement for data structures © 2010 IBM Corporation 10
    • IBM Power SystemsEXTDESC and EXTNAME For F specs: • new keyword EXTDESC • enhanced keyword EXTFILE(*EXTDESC) – EXTDESC(‘LIBNAME/FILENAME’) or EXTDESC(‘FILENAME’) locates the file at compile time – EXTFILE(*EXTDESC) indicates that the file specified by EXTDESC is also to be used at runtime. For D specs • EXTNAME keyword is enhanced – EXTNAME(‘LIBNAME/FILENAME’) or EXTNAME(‘FILENAME’) locates the file for the data structure at compile time. © 2010 IBM CorporationIBM Power SystemsLocal File Definition Files can be defined within a subprocedure Global definition no longer only way to define a file Advantages: 1. Maintainability : Coding the file definition in a subprocedure, the RPG programmer can explicitly limit the file’s access to only that subprocedure 1. Reduction of static storage: Defining the file locally reduces of the static storage required by the module, if the file is defined to use automatic storage for the internal storage required to manage the file. © 2010 IBM Corporation 11
    • IBM Power SystemsLIKEFILE Keyword Use to define files to same setting as another File Specification If the file is externally-described, the QUALIFIED keyword is implied. I/O to the file can only be done through data structures. The LIKEFILE keyword is used mostly with file parameters. © 2010 IBM CorporationIBM Power SystemsFiles as Parameters Files can now be passed as a parameters between procedures and programs: A prototyped parameter can be defined as a File parameter using the LIKEFILE keyword. Any file related by LIKEFILE keywords to the same original File specification may be passed as a parameter to the procedure. Within the called procedure or program, all supported operations can be done on the file parameter. However, I/O to the file parameter can only be done through data structures. RPG file parameters are not compatible with file parameters in other languages such as C or COBOL. © 2010 IBM Corporation 12
    • IBM Power SystemsFile Templates To use a file as a template: – Add the TEMPLATE keyword – File will be used at compile time for LIKEFILE definitions FcustF_t IF E K DISK TEMPLATE EXTDESC(‘CUSTF’) To define a “real” file that can be used at runtime or passed as a parameter: – Define the file using LIKEFILE. FcustF LIKEFILE(custF_t) F EXTFILE(*EXTDESC) © 2010 IBM CorporationIBM Power SystemsQualified Record Formats Using qualified record formats makes it easier to read and maintain RPG code. Consider this code without qualified names: read custRec custDs; if not %eof(inFile); if amtOwing > 1000; Compare to this version using qualified names: read inFile.custRec custDs; if not %eof(inFile); if custDs.amtOwing > 1000; © 2010 IBM Corporation 13
    • IBM Power SystemsLarger Fields No more artificial limits on variable definitions • Data structures, and A, C and G variables can now have a size up to 16,773,104 bytes – The system limit of 16,773,104 for a single variable still applies • The LEN keyword can be used instead of the Length entry – Required for length > 7 digits. • The VARYING keyword allows a parameter of either 2 or 4 indicating the number of bytes used to hold the length prefix. – VARYING(4) is assumed if the defined length of the definition is over 65535. • %ADDR(varying_field :*DATA) will get a pointer to the data portion of a varying length field. – Prior to 6.1, the data was always 2 bytes after the start of the field; now it can be 2 or 4 bytes. NOTE: Included to address requirement for working with data from other systems where the data can be much larger © 2010 IBM CorporationIBM Power SystemsMore Array Elements Larger limit for DIM and OCCURS No limit on the number of elements in an array or occurrences in a multiple-occurrence data structure. Total size for an array or structure remains at 16,773,104 bytes. Example: – If the elements of an array are 1 byte in size, the maximum DIM for the array is 16,773,104. – If the elements of an array are 10 bytes in size, the maximum DIM for the array is 1,677,310 (16773104/10). © 2010 IBM Corporation 14
    • IBM Power SystemsLonger Literals Size limits for string literals have been increased – Useful for generating RPG source with literals for prepared SQL statements, or for HTML data. – Character literals can now have a length up to 16380 characters. – UCS-2 literals can now have a length up to 8190 UCS-2 characters. – Graphic literals can now have a length up to 16379 DBCS characters. © 2010 IBM CorporationIBM Power SystemsMain With No Cycle Most modern RPG code does not overtly use the RPG Cycle Now available - an RPG module with a main procedure that does not rely on the RPG cycle. New Keyword on H Specification - MAIN – Designates one subprocedure as the main procedure (PEP) Designated subprocedure is like any other subprocedure - no RPG cycle. The prototype for the main subprocedure must have the EXTPGM keyword The main subprocedure can only be called by a program call. © 2010 IBM Corporation 15
    • IBM Power SystemsMain With No Cycle Example H MAIN(ordEntry) D ordEntry PR EXTPGM(‘ORDENTRY’) D custname 10A CONST P ordEntry B D ordEntry PI D custname 10A CONST ... code the main procedure logic here ... when it reaches the end, it just returns ... *INLR has no meaning P ordEntry E © 2010 IBM CorporationIBM Power SystemsRelaxed UCS-2 Rules Pre V6R1: RPG IV supported the UCS-2 data type; including support for UTF-16 – Extremely difficult to change the data type of a database character or graphic field to be UCS-2. – Compiler gives diagnostic error messages saying that the UCS-2 field cannot be used with the character data. RPG IV considers Character, UCS-2 and Graphic to be three separate data types. Using these data types together in the same statement required specific conversion using RPG built-in functions %CHAR, %UCS2 or %GRAPH. © 2010 IBM Corporation 16
    • IBM Power SystemsRelaxed UCS-2 Rules Change to compiler allows any string types to be used in assignment and comparison operations without explicit conversion. – Conversion performed implicitly by compiler UCS-2 variables can now be initialized with character or graphic literals – %UCS2 built-in function no longer necessary This enhancement is available in V5R3 and V5R4 with PTFs: V5R3M0 TGTRLS(*CURRENT): SI24532 V5R4M0 TGTRLS(*CURRENT): SI26312 V5R4M0 TGTRLS(*PRV) : SI25232 © 2010 IBM CorporationIBM Power SystemsModule Size Reduced Option now available to eliminate unused variables from the compiled object New values *UNREF and *NOUNREF are added to – the OPTION keyword for the CRTBNDRPG and CRTRPGMOD commands – Also for the OPTION keyword on the C specification. – The default remains *UNREF, meaning that unused variables are still generated *NOUNREF indicates that unreferenced variables should not be generated into the RPG module. – Reduces Program size – If imported variables are not referenced, it can reduce the time taken to bind a module to a program or service program. © 2010 IBM Corporation 17
    • IBM Power SystemsFull Thread Support Pre-V6R1: Using THREAD(SERIALIZE), RPG could run safely in multiple threads – each RPG module could be accessed by only one thread at a time. Overall performance and scalability of the application was impacted – each RPG module had the potential of being a bottleneck. V6R1: RPG module can run concurrently in multiple threads. © 2010 IBM CorporationIBM Power SystemsFull Thread Support…THREAD(*CONCURRENT) available for Control specification of a module – Multiple threads can run in the module at the same time. – By default, static variables will be defined so that each thread will have its own copy of the static variable. – Individual variables can be defined to be shared by all threads using STATIC(*ALLTHREAD). – Individual procedures can be serialized so that only one thread can run them at one time, by specifying SERIALIZE on the Begin Procedure specification.Considerations: – Using THREAD(*CONCURRENT) increases the total amount of static storage used • Total size = size required by module X number of threads © 2010 IBM Corporation 18
    • IBM Power SystemsParameter Information Stored in the Program For both the RPG IV and ILE COBOL compilers PCML can be placed in a stream file as before, directly in the module, or both. Information can later be retrieved from a program or service program containing the module, using the new QBNRPII API The PGMINFO command parameter for the CRTRPGMOD, CRTCBLMOD, CRTBNDRPG and CRTBNDCBL commands specifies location for PCML – The default location is the stream file specified by the INFOSTMF parameter – PGMINFO(*PCML:*MODULE) says to place the PCML information directly in the module • becomes part of the program or service program containing the module. – PGMINFO(*PCML:*ALL) says to place the PCML information both in the module and in the INFOSTMF stream file. © 2010 IBM CorporationIBM Power SystemsParameter Information Stored in the Program Alternate: H spec keyword for RPG or PROCESS option for COBOL The PGMINFO command parameter can be augmented or overridden by an H spec keyword (ILE RPG) or PROCESS option (ILE COBOL). – RPG: PGMINFO(*PCML:*MODULE) or PGMINFO(*NO) – COBOL: PGMINFO(PCML MODULE) or PGMINFO(NOPGMINFO) Priority ? – If the source keyword specifies “module”, then it augments the PGMINFO command parameter. For example, if the command requested *STMF, and the source keyword specifies *MODULE, then the PCML will be generated both to the stream file and into the module. – If the keyword specifies “no”, then it overrides the PGMINFO command parameter. No matter what was specified by the command parameter, no PCML information will be generated by the compiler. © 2010 IBM Corporation 19
    • IBM Power SystemsParameter info in program – V5R4 PTFs PTF support for V5R4 Part of this support is available in V5R4 with PTFs. – The H specification keyword for ILE RPG – The PROCESS option for ILE COBOL – The QBNRPII API The following V5R4M0 PTFs will provide the various parts of this function • 5722SS1 SI23544 (QBNRPII API) • 5722SS1 SI27064 (Support for compilers) • 5722WDS SI27061 (ILE RPG compiler PTF 1) • 5722WDS SI27065 (ILE RPG compiler PTF 2) • 5722WDS SI27154 (ILE COBOL compiler) – PCML Restrictions: http://publib.boulder.ibm.com/infocenter/iadthelp/v7r0/index.jsp?topic=/com.i bm.etools.iseries.pgmgd.doc/c0925076180.htm © 2010 IBM CorporationIBM Power Systems Agenda Our Investment in RPG IV Highlights from previous releases RPG 7.1 Enhancements Rational Open Access: RPG Edition Future of RPG IV © 2010 IBM Corporation 20
    • IBM Power Systems RPG 7.1 Enhancements Sorting Arrays Leave and Iter with Condition Support Alias names Implicit conversion between characters and UCS-2 Opening of RPG Interface Tool enhancements © 2010 IBM CorporationIBM Power SystemsSort and Search Data Structure Arrays Data structure arrays can be sorted and searched using one of the subfields as a key Sort the custDs array by the amount_owing subfield SORTA custDs(*).amount_owing; Search for an element in the custDs array where the elem = %LOOKUP("K" : custDs(*).account_status) Sort an array either ascending or descending Sort using SORTA(A) or SORTA(D) array cannot be a sequenced array (ASCEND or DESCEND keyword). Sort the salary array in descending order SORTA(D) salary © 2010 IBM Corporation 21
    • IBM Power SystemsScan and Replace New built-in function %SCANRPL The %SCANRPL built-in function scans for all occurrences of a value within a string and replaces them with another value. Replace "NAME" with "Tom" Before string1 = See NAME. See NAME run. Run NAME run. string2 = %ScanRpl(NAME : Paul : string1) After string2 = See Paul. See Paul run. Run Paul run. © 2010 IBM CorporationIBM Power SystemsPass Any Type of String Parameter Implicit conversion will be done for string parameters passed by value or by read-only reference. Example: Procedure is prototyped using a CONST UCS-2 parameter Character expression is passed as a parameter on a call to the procedure. This enables creation of a single procedure with the parameters and return value prototyped with the UCS-2 type. Calling the procedure, you can pass any type of string parameter, and assign the return value to any type of string variable. Sample The makeTitle procedure turns value to upper-case and centers it within the provided length alphaTitle = makeTitle(alphaValue : 50) ucs2Title = makeTitle(ucs2Value : 50) dbcsTitle = makeTitle(dbcsValue : 50) © 2010 IBM Corporation 22
    • IBM Power SystemsVarying Length %LEN(field-defined-as-varying : *MAX) Retrieves the maximum number of characters for a varying-length character, UCS-2 or Graphic field Encrypted listing debug view Allows distribution of debuggable programs without exposing source code via listing view Listing view will only be seen by person doing debug if encryption key has been entered Use DBGENCKEY parameter on CRTRPGMOD, CRTBNDRPG or CRTSQLRPG commands. © 2010 IBM CorporationIBM Power SystemsAlias Retrieves the maximum number of characters for a varying-length character, UCS-2 or Graphic field Use ALIAS names in externally-described data structures Use the ALIAS keyword on a Definition specification to indicate that you want to use the alternate names for the subfields of externally-described data structures Use the ALIAS keyword on a File specification to indicate that you want to use the alternate names for LIKEREC data structures defined from the records of the file DDS: A R CUSTREC A CUSTNM 25A ALIAS(CUSTOMER_NAME) A CUSTAD 25A ALIAS(CUSTOMER_ADDRESS) A ID 10P 0 RPG: D custDs e ds ALIAS D QUALIFIED EXTNAME(custFile) /free custDs.customer_name = John Smith; custDs.customer_address = 123 Mockingbird Lane; custDs.id = 12345; © 2010 IBM Corporation 23
    • IBM Power Systems Agenda Our Investment in RPG IV Highlights from previous releases RPG 7.1 Enhancements Rational Open Access: RPG Edition Future of RPG IV © 2010 IBM Corporation IBM Power SystemsRational Open Access: RPG Edition 5250 Screens RPG Applications Traditional RPG Interface User Interface Business Logic DB Access © 2010 IBM Corporation 24
    • IBM Power Systems Rational Open Access: RPG Edition 5250 Screens RPG Applications WRITE record program 5250 datastream I/O buffer Display file object * DSPF Other information: •state •names •pointers RPG Runtime Display Manager IBM i © 2010 IBM Corporation IBM Power SystemsRational Open Access: RPG Edition 5250 Screens RPG Applications Traditional RPG Interface JSPs User Interface How to Support Business Other Logic Interfaces? DB Access Mobile Other Devices Servers © 2010 IBM Corporation 25
    • IBM Power SystemsRational Open Access: RPG Edition Extend RPG to reach to new interfaces Custom Devices Workplace Future Rich Devices Client Eclipse RPG IV Mobile Rich Client + Open Browsers Access SOA Portal Interface Web Browsers © 2010 IBM CorporationIBM Power Systems Rational Open Access: RPG Edition ? RPG Applications Handler code to manage building the interface and proprietary information Handler Defined program I/O buffer WRITE record Other information: •state •names •pointers RPG Runtime Display Manager IBM i © 2010 IBM Corporation 26
    • IBM Power SystemsRational Open Access: RPG Edition 5250 Screens RPG Applications Traditional RPG Interface JSPs Target F Define the Handler Program Handlers D*********************** C* Data C Write Section1 C* : Handlers C* : C Write Section2 Target C : Program Handlers Target Program Mobile Other Devices Servers © 2010 IBM CorporationIBM Power SystemsAny RPG device type Any RPG device type can be defined as an Open Access file: DISK, PRINTER, or WORKSTN. The provider of the handling procedure can choose the RPG device-type that best fits the function that the handler provides. Examples User interface: WORKSTN file Creating an Excel document: PRINTER file Accessing a Web service: keyed DISK file © 2010 IBM Corporation 27
    • IBM Power SystemsThe RPG coding to define an Open Access file The HANDLER keyword identifies the location of the handler. The handler can be a program or a procedure. Fmyfile cf e workstn extdesc(MYLIB/MYFILE) F handler(MYLIB/MYSRVPGM(hdlMyfile)) F usropn Other examples of the HANDLER keyword handler(MYLIB/MYPGM) handler(charVariable) where charVariable = MYLIB/MYPGM or ‘MYSRVPGM(proc) handler(rpgPrototype) handler(procptrVariable) © 2010 IBM CorporationIBM Power Systems Rational Open Access: RPG Edition Target Program (comms code) Data Handlers F Define the Handler D*********************** C* C Write Section1 C* : C* : ISV or Customer C Write Section2 C : Rational Open Access: RPG Edition © 2010 IBM Corporation 28
    • IBM Power SystemsRational Open Access: RPG Edition New Licensed Program Product – Required for both development and runtime servers – 5733-OAR Tier Group Price – Priced by processor based on software tier Requires RDPower: RPG and COBOL Development for i as the development environment – For syntax checking, semantic checking, etc © 2010 IBM CorporationIBM Power Systems Agenda Our Investment in RPG IV Highlights from previous releases RPG 7.1 Enhancements Rational Open Access: RPG Edition Future of RPG IV © 2010 IBM Corporation 29
    • IBM Power Systems Summary RPG IV is Alive and Well!! Continued Continued Investment Enhancements from IBM Keep Your Cards and Letters Coming!! © 2010 IBM Corporation IBM Power Systems Trademarks & Disclaimers8 IBM Corporation 1994-2002. All rights reserved.References in this document to IBM products or services do not imply that IBM intends to make them available in every country.The following terms are trademarks or registered trademarks of International Business Machines Corporation in the United States, other countries, or both: AS/400 IBM(logo) AS/400e iSeries e (logo) business OS/400 IBMLotus, Freelance Graphics, and Word Pro are registered trademarks of Lotus Development Corporation and/or IBM Corporation.Domino is a trademark of Lotus Development Corporation and/or IBM Corporation.C-bus is a trademark of Corollary, Inc. in the United States, other countries, or both.Java and all Java-based trademarks are trademarks of Sun Microsystems, Inc. in the United States, other countries, or both.Microsoft, Windows, Windows NT, and the Windows logo are trademarks of Microsoft Corporation in the United States, other countries, or both.ActionMedia, LANDesk, MMX, Pentium and ProShare are trademarks of Intel Corporation in the United States, other countries, or both.UNIX is a registered trademark of The Open Group in the United States and other countries.SET and the SET Logo are trademarks owned by SET Secure Electronic Transaction LLC.Other company, product and service names may be trademarks or service marks of others.Information is provided "AS IS" without warranty of any kind.All customer examples described are presented as illustrations of how those customers have used IBM products and the results they may have achieved. Actualenvironmental costs and performance characteristics may vary by customer.Information in this presentation concerning non-IBM products was obtained from a supplier of these products, published announcement material, or other publicly availablesources and does not constitute an endorsement of such products by IBM. Sources for non-IBM list prices and performance numbers are taken from publicly availableinformation, including vendor announcements and vendor worldwide homepages. IBM has not tested these products and cannot confirm the accuracy of performance,capability, or any other claims related to non-IBM products. Questions on the capability of non-IBM products should be addressed to the supplier of those products.All statements regarding IBM future direction and intent are subject to change or withdrawal without notice, and represent goals and objectives only. Contact your localIBM office or IBM authorized reseller for the full text of the specific Statement of Direction.Some information in this presentation addresses anticipated future capabilities. Such information is not intended as a definitive statement of a commitment to specificlevels of performance, function or delivery schedules with respect to any future products. Such commitments are only made in IBM product announcements. Theinformation is presented here to communicate IBMs current investment and development activities as a good faith effort to help with our customers future planning.Performance is based on measurements and projections using standard IBM benchmarks in a controlled environment. The actual throughput or performance that anyuser will experience will vary depending upon considerations such as the amount of multiprogramming in the users job stream, the I/O configuration, the storageconfiguration, and the workload processed. Therefore, no assurance can be given that an individual user will achieve throughput or performance improvements equivalentto the ratios stated here.Photographs shown are of engineering prototypes. Changes may be incorporated in production models. © 2010 IBM Corporation 30
    • IBM Power Systems Faster return values A procedure defined with the RTNPARM keyword handles the return value as a hidden parameter. When a proced the procedure can be significantly improved by defining the procedure with the RTNPARM keyword. D getFileData pr a varying len(1000000) D rtnparm D file a const varying len(500) D data S a varying len(1000) /fre %PARMNUM built-in function The %PARMNUM(parameter_name) built-in function returns the ordinal number of the parameter within the param keyword. D pi D name 100a const varying D id 10i 0 value D errorInfo likeds(errs_t) D options(*nopass) /free // Check if the Optional prototypes If a program or procedure is not called by another RPG module, it is optional to specify the prototype. The prototyp A program that is only intended to be used as an exit program or as the command-processing program A program that is only intended to be called from a different programming language A procedure that is not exported from the module A procedure that is exported from the module but only intended to be called from a different programm Teraspace storage model RPG modules and programs can be created to use the teraspace storage model or to inherit the storage model of higher that for the single-level storage model. There are limits for the amount of automatic storage for a single proc Use the storage model (STGMDL) parameter on the CRTRPGMOD or CRTBNDRPG command, or use the STGM *TERASPACE The program or module uses the teraspace storage model. *SNGLVL The program or module uses the single-level storage model. *INHERIT The program or module inherits the storage model of its caller. Change to the ACTGRP parameter of the CRTBNDRPG command and the ACTGRP keyword on the Control specificati The default value of the ACTGRP parameter and keyword is changed from QILE to *STGMDL. ACTGRP(*STGMDL) specifies that the activation group depends on the storage model of the program. When the s ACTGRP(*STGMDL) is the same as ACTGRP(QILE). Note: The change to the ACTGRP parameter and keyword does not affect the default way the activation group is assign ACTGRP parameter or keyword is not specified, the activation group of the program will default 2010 IBM Corporation in © to QILE as it did Allocate teraspace storage 31