Global Server State

[goldenratio]

is it possible to have a shared global app state (thread safe), so this data is accessible in components (read/write). Something similar to actix-web's app_data.

[lann]

You can configure the Spin key-value store to run in-memory:

# runtime_config.toml
[key_value_store.default]
type = "spin"
# By omitting the path below, the store will exist only in memory
# path = "path/to/store.d"

$ spin up --runtime-config-file runtime_config.toml
...
Using in-memory default key-value store; data will not be saved!

[goldenratio]

can it be more than KV data, something like game play manager (fancy struct with impl) (in-memory). I don't want to create additional service for this

[lann]

You can similarly configure in-memory SQLite Storage:

[sqlite_database.default]
type = "spin"

Those are the only two in-memory options currently available with Spin.