This version of the C++ STTP API has operational reverse connection modes for publisher and subscriber implementations.

See build steps to create a platform specific library.

Updates:

• Added reverse connection implementation for STTP subscriber
• Added common ResolveDNSName function
• Updated date/time conversions from ticks to apply value mask so that any leap second bits are not included in converted timestamps
• Updated Timer class to ManualResetEvent based wait operation
• Reduced possible race conditions on disconnect and shutdown threads
• Added default time reasonability subscription settings
• Updated initial reconnect attempt to wait for specified retryInterval to better handle Linux TIME_WAIT socket state
• Cleaned up API interfaces, exposed MaxRetryInterval connection parameter
• Added reverse connection implementation for STTP publisher
• Updated data subscriber operational modes assignment to exclude deprecated modes for IEEE 2664
• Added string names for command/response enums for improved output messages
• Abstracted subscriber connector operation for both subscriber and publisher use (for reverse connections)
• Added initial STTP v3 subscription operations
• Updated code to consistently use var.data() instead of &var[0]
• Updated subscriber for STTP v2 multi-signal index caches
• Updated subscriber to not auto-send operational modes on compression state change
• Synced Command/Response Enums to latest IEEE 2664 standard
• Updated ANTLR4 C++ runtime to v4.11.1
• Added leap second functions
• Added double and decimal modulus operation support
• Improved string function null value handling consistency
• Improved date function null value handling consistency
• Added a few more common aliases to Convert expression function
• Corrected Sqrt expression return types for integer sources
• Improved null checks for DateAdd and DatePart interval type
• Updated to use common grammar with multi-language unexpected character exception
• Improved connection string setup for data subscribers

Not working yet:

• TLS Connections
• UDP Channel Compression / Encryption
• Buffer Blocks

See build steps to create a platform specific library.

Updates:

• Updated data subscriber disconnect and shutdown operations to run on a separate thread
• Improved data subscriber auto-reconnect operations, especially during shutdown
• Improved data publisher device feedback and shutdown operations
• Improved timer related shutdown operations
• Updated class destructors to never throw exceptions
• Updated all custom exceptions to inherit from both boost and std library exception
• Added a simple thread pool and ThreadSleep macro
• Added fallthrough attributes where applicable
• Added extra null checks for all std::function delegates
• Updated TCP connect in data subscriber to use newer range based overload

See build steps to create a platform specific library.

Updates:

• Updated all string to numeric, boolean, Guid and timestamp conversions to use TryParse style operations -- prevents possible exceptions with malformed metadata
• Updated integer-based TryParse functions to assign a radix of 16 when string starts with "0x"
• Fixed exception in data publisher when no filterExpression is provided in connection string from a subscriber
• Fixed conversion to boolean targets in filter expressions
• Fixed reverse filter expression function to operate properly
• Updated filter expression functions that return null for null primary input to handle null return before any non-null validation of remaining parameters
• Updated data publisher to be restartable after a call to stop
• Updated data publisher to handle calls to Stop a separate shutdown thread to prevent issues where user may call stop method from a dispatched event thread
• Improved data publisher shutdown operations
• Added NaN constant and IsEmptyOrWhiteSpace function to CommonTypes
• Added TryParseUInt32 to convert functions
• Updated socket related asio delegates to use templated lambdas
• Updated fractional second operations to use integer division
• Updated ANTLR CPP runtime to version 4.9
• Updated pugixml version to 1.11
• Updated code to support boost v1.75 -- this required custom include file to fix duplicate symbol errors during link
• Switched unicode conversions to nemtrif UTF8 library as wstring_convert is deprecated in C++17
• Migrated headers to use "#pragma once" instead of old-style include guards
• Updated code to support C++20
• Updated code per clang suggestions
• Added additional comments to TSSC algorithm for inclusion in IEEE 2664 standard

See build steps to create a platform specific library.

See build steps to create a platform specific library.