GothenburgBitFactory/taskchampion-sync-server
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Make storage transactions specific to a client_id (#67)

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Transactions for different client_ids cannot interfere with one another,
so this provides an opportunity for the sort of concurrency that a
mult-client hosting solution might need. For example, a postgres backend
could lock the client row in each transaction.
This commit is contained in:
Dustin J. Mitchell 2024-11-27 00:09:03 -05:00 • committed by GitHub
parent 4029c03479
commit 1828a31a24
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GPG key ID: B5690EEEBB952194
9 changed files with 246 additions and 319 deletions
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20
server/src/api/add_version.rs
View file

@ -82,9 +82,11 @@ pub(crate) async fn service(
}
Err(ServerError::NoSuchClient) => {
// Create a new client and repeat the `add_version` call.
let mut txn = server_state.server.txn().map_err(server_error_to_actix)?;
txn.new_client(client_id, NIL_VERSION_ID)
.map_err(failure_to_ise)?;
let mut txn = server_state
.server
.txn(client_id)
.map_err(server_error_to_actix)?;
txn.new_client(NIL_VERSION_ID).map_err(failure_to_ise)?;
txn.commit().map_err(failure_to_ise)?;
continue;
}
@ -111,8 +113,8 @@ mod test {
// set up the storage contents..
{
let mut txn = storage.txn().unwrap();
txn.new_client(client_id, Uuid::nil()).unwrap();
let mut txn = storage.txn(client_id).unwrap();
txn.new_client(Uuid::nil()).unwrap();
txn.commit().unwrap();
}
@ -181,8 +183,8 @@ mod test {
// Check that the client really was created
{
let mut txn = server.server_state.server.txn().unwrap();
let client = txn.get_client(client_id).unwrap().unwrap();
let mut txn = server.server_state.server.txn(client_id).unwrap();
let client = txn.get_client().unwrap().unwrap();
assert_eq!(client.latest_version_id, new_version_id);
assert_eq!(client.snapshot, None);
}
@ -197,8 +199,8 @@ mod test {
// set up the storage contents..
{
let mut txn = storage.txn().unwrap();
txn.new_client(client_id, version_id).unwrap();
let mut txn = storage.txn(client_id).unwrap();
txn.new_client(version_id).unwrap();
txn.commit().unwrap();
}