streamtool history

Usage

history [--clear] [-h,--help] [--trace <level>] [-v,--verbose <level>] [--zkconnect {<host>:<port>},... | --embeddedzk]

The streamtool history command returns a list of streamtool commands that you ran recently. This command is only valid within the interactive streamtool interface.

Authority

You do not need any authority to run this command.

Description

The command returns a list that is specific to the current user; you do not see the streamtool commands that are run by other users.

The list of commands can span multiple interactive streamtool sessions, so you can see commands that you used in previous sessions. If you have multiple interactive streamtool sessions active at the same time, any commands that you run in the other sessions after you start the current session are not included in the streamtool history output.

Options

--clear
Removes all items from the buffer.
--embeddedzk

Specifies to use the embedded copy of ZooKeeper. This option is not supported within the interactive streamtool interface.

If you are not using the interactive streamtool interface and you do not specify either this option or the --zkconnect option, Streams uses the ZooKeeper connection that is associated with the active domain or the domain that is specified in the --domain-id option. Streams determines which connection maps to the domain by using cached information about the domains. In this scenario, if the domain identifier is not unique in the Streams configuration cache, the command fails.

-h,--help
Specifies to show the command syntax.
--trace <level>
Specifies the trace setting. The following valid levels are listed in order of increasing verbosity, which is to say that the first level in the list generates the least amount of information:
  • off
  • error
  • warn
  • info
  • debug
  • trace
The default value is off.
-v,--verbose <level>
Specifies to provide more detailed command output. The verbosity level can be 0-3, where 0 disables detailed reporting and each increment provides more detailed output.
--zkconnect <{<host>:<port>},...>

The name of one or more host and port pairs that specify the configured ZooKeeper servers. This option is not supported within the interactive streamtool interface.

If you are not using the interactive streamtool interface and you do not specify this option, Streams tries to use:

  1. The --embeddedzk option
  2. The value from the STREAMS_ZKCONNECT environment variable
  3. A ZooKeeper connection string that is derived from cached information about the current domain.

Examples

The following streamtool history command output reports that the bsmith user ran streamtool commands to create and start a domain:

[streamtool <bsmith@StreamsDomain.StreamsInstance>] history
mkdomain -d TEST
startdomain
history