bpm-engine-storage 0.2.0

Storage traits and types for the BPM engine (process, token, timer, history)
Documentation 
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use async_trait::async_trait;

#[async_trait]
pub trait ParallelJoinRepo: Send + Sync {
    async fn ensure_group(&self, group_id: &str, expected: u32) -> anyhow::Result<()>;
    async fn try_join(&self, group_id: &str) -> anyhow::Result<bool>;
}