Key Value Task
The key value kv task provides access to the server’s simple string
key-value store. All data is project-scoped e.a. processes only see the values
created by processes of the same project.
This task is provided automatically by Concord.
Usage
Setting a Value
Setting a string value:
- ${kv.putString("myKey", "myValue")}
Setting an integer (64-bit long) value:
- ${kv.putLong("myKey", 1234)}
Retrieving a Value
Using the OUT syntax of expressions:
- expr: ${kv.getString("myKey")}
out: myVar
- log: "I've got ${myVar}"
Using the context:
- ${context.setVariable("myVar", kv.getString("myKey"))}
- log: "I've got ${myVar}"
In scripts:
- script: groovy
body: |
def kv = tasks.get("kv")
def id = kv.inc(execution, "idSeq")
println("I've got ${id}")
The execution variable is an alias for context
and automatically provided by the runtime for all supported script engines.
Check out the source code
for all available public methods.
Integer values can be retrieved in the same way:
- log: "I've got ${kv.getLong('myKey')}"
Removing a Value
- ${kv.remove("myVar")}
- if: ${kv.getString("myVar") == null}
then:
- log: "Ciao, myVar! You won't be missed."
Incrementing a Value
This can be used as a simple sequence number generator.
- expr: ${kv.inc("idSeq")}
out: myId
- log: "We got an ID: ${myId}"
Warning: the existing string values can’t be incremented.