ttlru

Available in: Cloud, Self-Managed

Stores key/value pairs in a ttlru in-memory cache. This cache is therefore reset every time the service restarts.

  • Common

  • Advanced

# Common config fields, showing default values
label: ""
ttlru:
  cap: 1024
  default_ttl: 5m0s
  init_values: {}
# All config fields, showing default values
label: ""
ttlru:
  cap: 1024
  default_ttl: 5m0s
  ttl: "" # No default (optional)
  init_values: {}
  optimistic: false

The cache ttlru provides a simple, goroutine safe, cache with a fixed number of entries. Each entry has a per-cache defined TTL.

This TTL is reset on both modification and access of the value. As a result, if the cache is full, and no items have expired, when adding a new item, the item with the soonest expiration will be evicted.

It uses the package expirable

The field init_values can be used to pre-populate the memory cache with any number of key/value pairs:

cache_resources:
  - label: foocache
    ttlru:
      default_ttl: '5m'
      cap: 1024
      init_values:
        foo: bar

These values can be overridden during execution.

Fields

cap

The cache maximum capacity (number of entries)

Type: int

Default: 1024

default_ttl

The cache ttl of each element

Type: string

Default: "5m0s"

ttl

Deprecated. Please use default_ttl field

Type: string

init_values

A table of key/value pairs that should be present in the cache on initialization. This can be used to create static lookup tables.

Type: object

Default: {}

# Examples

init_values:
  Nickelback: "1995"
  Spice Girls: "1994"
  The Human League: "1977"

optimistic

If true, we do not lock on read/write events. The ttlru package is thread-safe, however the ADD operation is not atomic.

Type: bool

Default: false