event-store-adapter-rs

This library is designed to turn DynamoDB into an Event Store for Event Sourcing.

Usage

You can easily implement an Event Sourcing-enabled repository using EventStore.

```rust pub struct UserAccountRepository { event_store: EventStore, }

impl UserAccountRepository { pub fn new(eventstore: EventStore) -> Self { Self { eventstore } }

pub async fn storeevent(&mut self, event: &UserAccountEvent, version: usize) -> Result<()> { return self.eventstore.persist_event(event, version).await; }

pub async fn storeeventandsnapshot(&mut self, event: &UserAccountEvent, snapshot: &UserAccount) -> Result<()> { return self.eventstore.persisteventand_snapshot(event, snapshot).await; }

pub async fn findbyid(&self, id: &UserAccountId) -> Result { let snapshot = self.eventstore.getlatestsnapshotbyid(id).await?; match snapshot { Some((snapshot, version)) => { let events = self.eventstore .geteventsbyidsinceseqnr(id, snapshot.seq_nr) .await?; let result = UserAccount::replay(events, snapshot, version); Ok(Some(result)) } None => Ok(None), } }

} ```

The following is an example of the repository usage.

```rust let eventstore = EventStore::new( awsdynamodbclient.clone(), journaltablename.tostring(), journalaidindexname.tostring(), snapshottablename.tostring(), snapshotaidindexname.to_string(), 64, );

let mut repository = UserAccountRepository::new(event_store);

// Replay the aggregate from the event store let mut useraccount = repository.findbyid(useraccount_id).await.unwrap();

// Execute a command on the aggregate let useraccountevent = user_account.rename(name).unwrap();

// Store the new event without a snapshot repository .storeevent(&useraccountevent, useraccount.version()) .await // Store the new event with a snapshot // repository // .storeeventandsnapshot(&useraccountevent, &useraccount) // .await ```

event-store-adapter-rs

Usage

Table Specifications

License.

Other language implementations