Features Added in 4.0

Application Server JCA Support for Enterprise Server

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This release includes the following enhancements:

• COBOL Resource Adapters now support WebSphere 9.0 and WebLogic 12.2.1.
• Tomcat 7.0 support for servlet generation with J2SEBeans.
• NullSearch utility - for COBOL resource adapters, this new utility provides assistance in locating NULL fields in mappings passed to Enterprise Server. When a large number of arguments is provided in the parameters passed to Enterprise Server, it is difficult to locate NULL fields, which are not allowed. The NullSearch utility isolates NULL fields, so the Java application can be corrected.

Compiler directives

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The following Compiler directives are new in this release:

• DISPSIGN - determines the display output of numeric fields with included signs, under an IBM mainframe dialect only.
• GNTLITLINKSTD - stops the suppression of call-convention 8 when both call-convention 2 and call-convention 8 are in effect for a .gnt file in an Intel x86 32-bit environment.
• ILSMARTTRIM - trims any trailing spaces from a string item returned by the get property associated with an alphanumeric item processed by ILSMARTLINKAGE.
• MAINFRAME-FLOATING-POINT - specifies the format of a program's floating point data items: either IBM hexadecimal format or IEEE format. This directive is supported in managed code only.

The following Compiler directives contain new parameters in this release:

• CHECKDIV - a new parameter 'ACOS' now emulates a divide by zero operation on an ACOS mainframe system: the quotient and the remainder are set to the value of the dividend.
• OOCTRL - a new parameter, L, specifies whether to include directory location comments in .cls and .ins inheritance files.
• NUMPROC - a new parameter 'ACOS' provides partial compatibility with the behavior of NEC ACOS COBOL processing of invalid data in USAGE DISPLAY data items and invalid sign information in USAGE COMP-3 data items.

Data File Tools

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It is now possible to export any filtered results. When filtering a data file, you can use the results to create a new data file - click Search > Export Results when a filter is applied to save the filtered records to a new file. You can:

• Save the filtered records to a new file.
• Save the records that match the specified filter (such as customer information or orders).
• Download a subset of the data from a remote file.
• Save a small portion of the data for testing purposes.

Database Connectors

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Docker

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This release provides support to enable you to run your COBOL applications in Docker containers, taking advantage of the many benefits offered by the Docker platform such as portability, performance, agility, isolation, and scalability.

Enterprise Server

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The following enhancements have been made to Enterprise Server:

• Conversation filtering - the Enterprise Server Communications Process (MFCS) can now restrict access to listeners by client address. You can specify any permitted or forbidden addresses either by IP address, network mask, or domain name, and use wildcards. Filters can be applied to individual listeners, communications processes, or to entire regions. More specific filter rules override any general ones.

• The Enterprise Server Security Facility now starts throttling Verify requests when it receives more than 100 requests per second.

  This can be used to limit the effectiveness of denial-of-service and brute force attacks. You can configure the value where throttling occurs. See Verify Request Throttling for more information.

• (Technology Preview only) Support for adding, deleting, and modifying XA resources in a live Enterprise Server region.

  It is now possible to add, edit, or delete XA resources while an enterprise server instance is running. Any changes made come into effect after any in-flight transactions have completed. The ability to make these changes in a live environment comes under the control of the existing enterprise server permissions.

• XA-compliant Resources (XARs) - this release provides enhanced CTF tracing that allows more flexible reporting of warnings and errors on the RM switch module level.

• A new Communications Server resource class - enables you to control the access to the Enterprise Server Console Log and Communications Server Log when external security is in effect for an enterprise server region; see Resource Classes for Communications Server for more information.

• Improved catalog availability - there is now an improved resilience to temporary communication issues with the catalog and error reporting enabling a region to stay active if a region has multiple catalogs defined and one of the catalogs is not available.

• Enhanced SSL/TLS certificate support - for communications with TLS (formerly SSL), additional certificate and key file formats are supported. Servers may now be configured with both an RSA and an ECC key and certificate.
• Enhanced SSL/TLS cipher configuration - for communications with TLS (formerly SSL), the permitted cipher suites and their preferred order can now be configured. The minimum size of Diffie-Hellman groups for DH key exchange can also be configured. The defaults have been made more secure.

• The Historical Statistics Facility (HSF) now enables you to write user-defined data to the records produced within a .csv file. Use the ES_WRITE_CUSTOM_HSF or ESCSTHSF library routines within your COBOL programs to define the custom data, and use the ES_HSF_CFG environment variable to configure up to five custom fields in the generated record.
• You can also use the ES_HSF_CFG environment variable to configure the number of CICSF, TSQ, and TDQ fields that are written to the record.

File Handler

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This release provides the following enhancements:

• The DFSORT and SYNCSORT emulations now support the NULLOFL parameter of the OUTFIL statement.
• The ASCIISOSI configuration option is now available. It adds the required SOSI characters to the relevant EBCDIC DBCS character strings in order for them to be displayed or written out correctly.

Managed COBOL

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Deploying JVM COBOL to an Application Server:

• Running JVM COBOL under WebSphere 9.0 and WebLogic 12.2.1 is now supported.

OpenESQL

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This release provides the following new features:

• Support for SQL Server 2017.
• The SQL(TRANSACTION) compiler directive has been enhanced to clearly define transaction boundaries.
• A new SQL(NOWHERECURRENT) compiler directive that allows you to define updateable cursors that do not do positioned updates or deletes with PostgreSQL or MySQL.
• Larger communication area (PID) that accommodates longer plan and program names.
• SQL(OPTIMIZECURSORS) has been enhanced for consistent and better cursor performance across all OpenESQL backends.

Platform support

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Note the following changes in platform support for this release:

• SUSE platforms - this release only supports SUSE Linux 12 SP2, 64-bit.

  On this platform, you can only build COBOL programs to 64-bit executables. This applies when using Eclipse on SUSE or with remote projects when Visual COBOL Development Hub is installed on SUSE.

XML Extensions

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Two new state management statements have been introduced, XML GET WHITESPACE-FLAGS and XML SET WHITESPACE-FLAGS, that enable you to control how whitespace is handled when importing data; refer to the topic Handling spaces and whitespace in XML for more information.