Haystack Client

Rust implementation of an async haystack client library and CLI tool and REPL.

Implemented Ops

• About
• Close
• Defs
  • filter
  • limit
• Libs
  • filter
  • limit
• Ops
  • filter
  • limit
• Filetypes
  • filter
  • limit
• Read
  • By filter
  • By id
• Nav
• WatchSub
• WatchUnsub
• WatchPoll
• PointWrite
• hisRead
  • Single
  • Batch
• hisWrite (Must be valid zinc str)
  • Single
  • Batch
• Invoke Action

Example CLI uses

# Reuse haystack bearer token
( # () Opens a sub-shell
  export HAYSTACK_AUTH_CONFIG=`hs default auth`;
  
  # Destination does not need to be included if the environment variable
  # HAYSTACK_AUTH_CONFIG is set.
  
  # I also set up my .bashrc to use the alias "hs" instead of the full name.
  # Stick with `haystack-client` if you haven't configured your .bashrc this way
  hs read --filter "point" --limit=1

  # Example below of correct character escaping in bash shell when passing
  # filters enclosed by either single or double quotes.
  hs read --filter 'point and unit==\"kWh\" and equipRef->siteRef'
  hs read --filter "point and unit==\\\"kWh\\\" and equipRef->siteRef"
)

# Read–eval–print loop (REPL) You will see the prompt "hs〉"
# To learn about the $DEST argument, see the configuration section below.
haystack-client $DEST repl
hs〉about

# About
haystack-client $DEST about

# Read by filter
haystack-client $DEST read --filter "point and unit==\"kWh\" and equipRef->siteRef"

# Read by ids
haystack-client $DEST read --ids @p:demo:r:2f70054a-87f6d1de @p:demo:r:2f70054a-314342cd

# His Read (single)
haystack-client $DEST hisRead yesterday @p:demo:r:2f70054a-87f6d1de

# His Read (batch, could use the optional --timezone argument)
haystack-client $DEST hisRead yesterday @p:demo:r:2f70054a-87f6d1de @p:demo:r:2f70054a-314342cd

# WatchSub
## Can create watches with or without an id list
haystack-client $DEST watchSub -c "test" @p:demo:r:2f70054a-51d71f8e

## Subscribing points to a watch
haystack-client $DEST watchSub -s "w-2f8e0d48-64f17e75" @p:demo:r:2f70054a-51d71f8e @p:demo:r:2f70054a-69f26216

# Unsubscribing and closing a watch
haystack-client $DEST watchUnsub --close w-2f8e1d8b-8efac249
haystack-client $DEST watchUnsub @p:demo:r:2f70054a-51d71f8e

# Watch Poll (with or without --refresh)
haystack-client $DEST watchPoll w-2f8e2739-3c4b3bde --refresh

# Defs
haystack-client $DEST defs "name==\\\"testJob\\\"" --limit 1

TODO

• Implement remaining Haystack OPs
• Provide options that allow the user to control the structure and format of returned grid. i.e. when creating new watches, allow the user to return the watchId only.
• Provide option for watches to be reopened automatically if an error grid is returned on watch OPs.
• Treat error grids as errors
• Provide some more advanced tooling to suport hisWrite
  • Support to map data from CSV to native haystack types
  • Support for different filetypes
    • CSV, ZINC, JSON, Trio
  • Support methods to map to point rec IDs on the server
  • Embed scripting language, i.e. lua or awk?
• Use an alternative library for SCRAM authentication