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Benjamin Carlsson
440312f113
## Why A thread ID alone does not identify the backend that owns a session. Resume and fork selections must retain that ownership across connection replacement so they cannot operate on another backend, even when thread IDs match. ## What changed - Add a process-local `BackendId` to app-server sessions and session targets, preserving it across reconnects and auxiliary picker connections. - Reject selections from a different backend before changing session state or sending resume, fork, or unarchive requests. - Disable local-daemon fallback to an embedded server for auxiliary pickers and after selecting a session, while retaining fallback for fresh startup. ## Testing Add regression coverage for foreign selections with matching thread IDs, startup resume and fork rejection before requests, shared ownership across picker connections, and fallback eligibility. GitOrigin-RevId: 05a3ca0a901a8dc24337d130548aa2c048b4d586
13 lines
448 B
Rust
13 lines
448 B
Rust
//! Logical backend identity, independent of a transport connection or native thread ID.
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//! Reconnecting and auxiliary picker connections reuse the launch owner; a different
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//! backend gets a fresh identity. These process-local IDs never appear on the wire.
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#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
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pub(crate) struct BackendId(uuid::Uuid);
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impl BackendId {
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pub(crate) fn new() -> Self {
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Self(uuid::Uuid::new_v4())
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}
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}
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