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Track presence state per-device and combine to a user state. #16066
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@erikjohnston Can you take a look at this and see if I'm wildly missing something / breaking the world? |
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Seems to mostly make sense, though it is a huge PR. Left some comments, but I think we might need to sit down with it? I'm assuming there is now chance of splitting this PR up?
if prev_state.state == PresenceState.UNAVAILABLE: | ||
new_fields["state"] = PresenceState.ONLINE | ||
# Update the device information & mark the device as online if it was | ||
# unavailable. |
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I feel like this is a "what" comment rather than a "why" comment? Why can't we go from offline -> online? Presumably because we need to have a sync stream to transition out of offline, which we clearly don't have?
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That's fair, I think the code is just a bit complicated and was attempting to put a succinct description of what's going on.
synapse/handlers/presence.py
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# Mark the device as online since it is not syncing, this | ||
# might mark the user as online, so send an update. | ||
device_state.state = PresenceState.ONLINE | ||
presence = _combine_device_states(devices.values()) |
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I feel like a lot of this logic is a bit scattered around? I'd expect the state machine conditions to be in one place where we update the device info?
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Yes, I did not love how this is scattered around. Will give it a think! 👍
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I think this is pretty simplified now, but we still do call _combine_presence_state
in a few spots.
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if (PRESENCE_BY_PRIORITY[device_state.state], device_state.last_active_ts) > ( | ||
PRESENCE_BY_PRIORITY[presence], | ||
last_active_ts, | ||
): | ||
presence = device_state.state | ||
last_active_ts = device_state.last_active_ts |
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This could probably all be replaced with max(device_states)
if we define the correct comparison method.
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Or even just max
with an explicit key
function.
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Tracks presence on an individual per-device basis and combine the per-device state into a per-user state. This should help in situations where a user has multiple devices with conflicting status (e.g. one is syncing with unavailable and one is syncing with online). The tie-breaking is done by priority: BUSY > ONLINE > UNAVAILABLE > OFFLINE
No significant changes since 1.93.0rc1. The following issues are fixed in 1.93.0 (and RCs). - [GHSA-4f74-84v3-j9q5](GHSA-4f74-84v3-j9q5) / [CVE-2023-41335](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-41335) — Low Severity Temporary storage of plaintext passwords during password changes. - [GHSA-7565-cq32-vx2x](GHSA-7565-cq32-vx2x) / [CVE-2023-42453](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42453) — Low Severity Improper validation of receipts allows forged read receipts. See the advisories for more details. If you have any questions, email security@matrix.org. - Add automatic purge after all users have forgotten a room. ([\matrix-org#15488](matrix-org#15488)) - Restore room purge/shutdown after a Synapse restart. ([\matrix-org#15488](matrix-org#15488)) - Support resolving homeservers using `matrix-fed` DNS SRV records from [MSC4040](matrix-org/matrix-spec-proposals#4040). ([\matrix-org#16137](matrix-org#16137)) - Add the ability to use `G` (GiB) and `T` (TiB) suffixes in configuration options that refer to numbers of bytes. ([\matrix-org#16219](matrix-org#16219)) - Add span information to requests sent to appservices. Contributed by MTRNord. ([\matrix-org#16227](matrix-org#16227)) - Add the ability to enable/disable registrations when using CAS. Contributed by Aurélien Grimpard. ([\matrix-org#16262](matrix-org#16262)) - Allow the `/notifications` endpoint to be routed to workers. ([\matrix-org#16265](matrix-org#16265)) - Enable users to easily unsubscribe to notifications emails via the `List-Unsubscribe` header. ([\matrix-org#16274](matrix-org#16274)) - Report whether a user is `locked` in the [List Accounts admin API](https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#list-accounts), and exclude locked users by default. ([\matrix-org#16328](matrix-org#16328)) - Fix a long-standing bug where multi-device accounts could cause high load due to presence. ([\matrix-org#16066](matrix-org#16066), [\matrix-org#16170](matrix-org#16170), [\matrix-org#16171](matrix-org#16171), [\matrix-org#16172](matrix-org#16172), [\matrix-org#16174](matrix-org#16174)) - Fix a long-standing bug where appservices using [MSC2409](matrix-org/matrix-spec-proposals#2409) to receive `to_device` messages would only get messages for one user. ([\matrix-org#16251](matrix-org#16251)) - Fix bug when using workers where Synapse could end up re-requesting the same remote device repeatedly. ([\matrix-org#16252](matrix-org#16252)) - Fix long-standing bug where we kept re-requesting a remote server's key repeatedly, potentially causing delays in receiving events over federation. ([\matrix-org#16257](matrix-org#16257)) - Avoid temporary storage of sensitive information. ([\matrix-org#16272](matrix-org#16272)) - Fix bug introduced in Synapse 1.49.0 when using dehydrated devices ([MSC2697](matrix-org/matrix-spec-proposals#2697)) and refresh tokens. Contributed by Hanadi. ([\matrix-org#16288](matrix-org#16288)) - Fix a long-standing bug where invalid receipts would be accepted. ([\matrix-org#16327](matrix-org#16327)) - Use standard name for UTF-8 charset in emails. ([\matrix-org#16329](matrix-org#16329)) - Don't try refetching device lists for users on remote hosts that are marked as "down". ([\matrix-org#16298](matrix-org#16298)) - Fix typos in the documentation. ([\matrix-org#16282](matrix-org#16282)) - Link to the Alpine Linux community package for Synapse. ([\matrix-org#16304](matrix-org#16304)) - Use string for `federation_client_minimum_tls_version` documentation examples. Contributed by @jcgruenhage. ([\matrix-org#16353](matrix-org#16353)) - Allow modules to delete rooms. ([\matrix-org#15997](matrix-org#15997)) - Add GCC and GNU Make to the Nix flake development environment so that `ruff` can be compiled. ([\matrix-org#16090](matrix-org#16090), [\matrix-org#16263](matrix-org#16263)) - Fix type checking when using the new version of Twisted. ([\matrix-org#16235](matrix-org#16235)) - Delete device messages asynchronously and in staged batches using the task scheduler. ([\matrix-org#16240](matrix-org#16240), [\matrix-org#16311](matrix-org#16311), [\matrix-org#16312](matrix-org#16312), [\matrix-org#16313](matrix-org#16313)) - Bump minimum supported Rust version to 1.61.0. ([\matrix-org#16248](matrix-org#16248)) - Update rust to version 1.71.1 in the nix development environment. ([\matrix-org#16260](matrix-org#16260)) - Simplify server key storage. ([\matrix-org#16261](matrix-org#16261)) - Reduce CPU overhead of change password endpoint. ([\matrix-org#16264](matrix-org#16264)) - Stop purging from tables slated for removal. ([\matrix-org#16273](matrix-org#16273)) - Improve type hints. ([\matrix-org#16276](matrix-org#16276), [\matrix-org#16301](matrix-org#16301), [\matrix-org#16325](matrix-org#16325), [\matrix-org#16326](matrix-org#16326)) - Raise `setuptools_rust` version cap to 1.7.0. ([\matrix-org#16277](matrix-org#16277)) - Fix using the new task scheduler causing lots of CPU to be used. ([\matrix-org#16278](matrix-org#16278)) - Upgrade CI run of Python 3.12 from rc1 to rc2. ([\matrix-org#16280](matrix-org#16280)) - Include values in SQL debug when using `execute_values` with Postgres. ([\matrix-org#16281](matrix-org#16281)) - Enable additional linting checks. ([\matrix-org#16283](matrix-org#16283)) - Refactor `receipts_graph` Postgres transactions to stop error messages. ([\matrix-org#16299](matrix-org#16299)) - Small improvements to logging in replication code. ([\matrix-org#16309](matrix-org#16309)) - Remove a reference cycle in background processes. ([\matrix-org#16314](matrix-org#16314)) - Only use literal strings for background process names. ([\matrix-org#16315](matrix-org#16315)) - Refactor `get_user_by_id`. ([\matrix-org#16316](matrix-org#16316)) - Speed up task to delete to-device messages. ([\matrix-org#16318](matrix-org#16318)) - Avoid patching code in tests. ([\matrix-org#16349](matrix-org#16349)) - Test against PostgreSQL 16. ([\matrix-org#16351](matrix-org#16351)) * Bump mypy from 1.4.1 to 1.5.1. ([\matrix-org#16300](matrix-org#16300)) * Bump black from 23.7.0 to 23.9.1. ([\matrix-org#16295](matrix-org#16295)) * Bump docker/build-push-action from 4 to 5. ([\matrix-org#16336](matrix-org#16336)) * Bump docker/login-action from 2 to 3. ([\matrix-org#16339](matrix-org#16339)) * Bump docker/metadata-action from 4 to 5. ([\matrix-org#16337](matrix-org#16337)) * Bump docker/setup-qemu-action from 2 to 3. ([\matrix-org#16338](matrix-org#16338)) * Bump furo from 2023.8.19 to 2023.9.10. ([\matrix-org#16340](matrix-org#16340)) * Bump gitpython from 3.1.32 to 3.1.35. ([\matrix-org#16267](matrix-org#16267), [\matrix-org#16279](matrix-org#16279)) * Bump mypy-zope from 1.0.0 to 1.0.1. ([\matrix-org#16291](matrix-org#16291)) * Bump pillow from 10.0.0 to 10.0.1. ([\matrix-org#16344](matrix-org#16344)) * Bump regex from 1.9.4 to 1.9.5. ([\matrix-org#16233](matrix-org#16233)) * Bump ruff from 0.0.286 to 0.0.290. ([\matrix-org#16342](matrix-org#16342)) * Bump serde_json from 1.0.105 to 1.0.107. ([\matrix-org#16296](matrix-org#16296), [\matrix-org#16345](matrix-org#16345)) * Bump twisted from 22.10.0 to 23.8.0. ([\matrix-org#16235](matrix-org#16235)) * Bump types-pillow from 10.0.0.2 to 10.0.0.3. ([\matrix-org#16293](matrix-org#16293)) * Bump types-setuptools from 68.0.0.3 to 68.2.0.0. ([\matrix-org#16292](matrix-org#16292)) * Bump typing-extensions from 4.7.1 to 4.8.0. ([\matrix-org#16341](matrix-org#16341))
No significant changes since 1.93.0rc1. The following issues are fixed in 1.93.0 (and RCs). - [GHSA-4f74-84v3-j9q5](GHSA-4f74-84v3-j9q5) / [CVE-2023-41335](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-41335) — Low Severity Temporary storage of plaintext passwords during password changes. - [GHSA-7565-cq32-vx2x](GHSA-7565-cq32-vx2x) / [CVE-2023-42453](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42453) — Low Severity Improper validation of receipts allows forged read receipts. See the advisories for more details. If you have any questions, email security@matrix.org. - Add automatic purge after all users have forgotten a room. ([\matrix-org#15488](matrix-org#15488)) - Restore room purge/shutdown after a Synapse restart. ([\matrix-org#15488](matrix-org#15488)) - Support resolving homeservers using `matrix-fed` DNS SRV records from [MSC4040](matrix-org/matrix-spec-proposals#4040). ([\matrix-org#16137](matrix-org#16137)) - Add the ability to use `G` (GiB) and `T` (TiB) suffixes in configuration options that refer to numbers of bytes. ([\matrix-org#16219](matrix-org#16219)) - Add span information to requests sent to appservices. Contributed by MTRNord. ([\matrix-org#16227](matrix-org#16227)) - Add the ability to enable/disable registrations when using CAS. Contributed by Aurélien Grimpard. ([\matrix-org#16262](matrix-org#16262)) - Allow the `/notifications` endpoint to be routed to workers. ([\matrix-org#16265](matrix-org#16265)) - Enable users to easily unsubscribe to notifications emails via the `List-Unsubscribe` header. ([\matrix-org#16274](matrix-org#16274)) - Report whether a user is `locked` in the [List Accounts admin API](https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#list-accounts), and exclude locked users by default. ([\matrix-org#16328](matrix-org#16328)) - Fix a long-standing bug where multi-device accounts could cause high load due to presence. ([\matrix-org#16066](matrix-org#16066), [\matrix-org#16170](matrix-org#16170), [\matrix-org#16171](matrix-org#16171), [\matrix-org#16172](matrix-org#16172), [\matrix-org#16174](matrix-org#16174)) - Fix a long-standing bug where appservices using [MSC2409](matrix-org/matrix-spec-proposals#2409) to receive `to_device` messages would only get messages for one user. ([\matrix-org#16251](matrix-org#16251)) - Fix bug when using workers where Synapse could end up re-requesting the same remote device repeatedly. ([\matrix-org#16252](matrix-org#16252)) - Fix long-standing bug where we kept re-requesting a remote server's key repeatedly, potentially causing delays in receiving events over federation. ([\matrix-org#16257](matrix-org#16257)) - Avoid temporary storage of sensitive information. ([\matrix-org#16272](matrix-org#16272)) - Fix bug introduced in Synapse 1.49.0 when using dehydrated devices ([MSC2697](matrix-org/matrix-spec-proposals#2697)) and refresh tokens. Contributed by Hanadi. ([\matrix-org#16288](matrix-org#16288)) - Fix a long-standing bug where invalid receipts would be accepted. ([\matrix-org#16327](matrix-org#16327)) - Use standard name for UTF-8 charset in emails. ([\matrix-org#16329](matrix-org#16329)) - Don't try refetching device lists for users on remote hosts that are marked as "down". ([\matrix-org#16298](matrix-org#16298)) - Fix typos in the documentation. ([\matrix-org#16282](matrix-org#16282)) - Link to the Alpine Linux community package for Synapse. ([\matrix-org#16304](matrix-org#16304)) - Use string for `federation_client_minimum_tls_version` documentation examples. Contributed by @jcgruenhage. ([\matrix-org#16353](matrix-org#16353)) - Allow modules to delete rooms. ([\matrix-org#15997](matrix-org#15997)) - Add GCC and GNU Make to the Nix flake development environment so that `ruff` can be compiled. ([\matrix-org#16090](matrix-org#16090), [\matrix-org#16263](matrix-org#16263)) - Fix type checking when using the new version of Twisted. ([\matrix-org#16235](matrix-org#16235)) - Delete device messages asynchronously and in staged batches using the task scheduler. ([\matrix-org#16240](matrix-org#16240), [\matrix-org#16311](matrix-org#16311), [\matrix-org#16312](matrix-org#16312), [\matrix-org#16313](matrix-org#16313)) - Bump minimum supported Rust version to 1.61.0. ([\matrix-org#16248](matrix-org#16248)) - Update rust to version 1.71.1 in the nix development environment. ([\matrix-org#16260](matrix-org#16260)) - Simplify server key storage. ([\matrix-org#16261](matrix-org#16261)) - Reduce CPU overhead of change password endpoint. ([\matrix-org#16264](matrix-org#16264)) - Stop purging from tables slated for removal. ([\matrix-org#16273](matrix-org#16273)) - Improve type hints. ([\matrix-org#16276](matrix-org#16276), [\matrix-org#16301](matrix-org#16301), [\matrix-org#16325](matrix-org#16325), [\matrix-org#16326](matrix-org#16326)) - Raise `setuptools_rust` version cap to 1.7.0. ([\matrix-org#16277](matrix-org#16277)) - Fix using the new task scheduler causing lots of CPU to be used. ([\matrix-org#16278](matrix-org#16278)) - Upgrade CI run of Python 3.12 from rc1 to rc2. ([\matrix-org#16280](matrix-org#16280)) - Include values in SQL debug when using `execute_values` with Postgres. ([\matrix-org#16281](matrix-org#16281)) - Enable additional linting checks. ([\matrix-org#16283](matrix-org#16283)) - Refactor `receipts_graph` Postgres transactions to stop error messages. ([\matrix-org#16299](matrix-org#16299)) - Small improvements to logging in replication code. ([\matrix-org#16309](matrix-org#16309)) - Remove a reference cycle in background processes. ([\matrix-org#16314](matrix-org#16314)) - Only use literal strings for background process names. ([\matrix-org#16315](matrix-org#16315)) - Refactor `get_user_by_id`. ([\matrix-org#16316](matrix-org#16316)) - Speed up task to delete to-device messages. ([\matrix-org#16318](matrix-org#16318)) - Avoid patching code in tests. ([\matrix-org#16349](matrix-org#16349)) - Test against PostgreSQL 16. ([\matrix-org#16351](matrix-org#16351)) * Bump mypy from 1.4.1 to 1.5.1. ([\matrix-org#16300](matrix-org#16300)) * Bump black from 23.7.0 to 23.9.1. ([\matrix-org#16295](matrix-org#16295)) * Bump docker/build-push-action from 4 to 5. ([\matrix-org#16336](matrix-org#16336)) * Bump docker/login-action from 2 to 3. ([\matrix-org#16339](matrix-org#16339)) * Bump docker/metadata-action from 4 to 5. ([\matrix-org#16337](matrix-org#16337)) * Bump docker/setup-qemu-action from 2 to 3. ([\matrix-org#16338](matrix-org#16338)) * Bump furo from 2023.8.19 to 2023.9.10. ([\matrix-org#16340](matrix-org#16340)) * Bump gitpython from 3.1.32 to 3.1.35. ([\matrix-org#16267](matrix-org#16267), [\matrix-org#16279](matrix-org#16279)) * Bump mypy-zope from 1.0.0 to 1.0.1. ([\matrix-org#16291](matrix-org#16291)) * Bump pillow from 10.0.0 to 10.0.1. ([\matrix-org#16344](matrix-org#16344)) * Bump regex from 1.9.4 to 1.9.5. ([\matrix-org#16233](matrix-org#16233)) * Bump ruff from 0.0.286 to 0.0.290. ([\matrix-org#16342](matrix-org#16342)) * Bump serde_json from 1.0.105 to 1.0.107. ([\matrix-org#16296](matrix-org#16296), [\matrix-org#16345](matrix-org#16345)) * Bump twisted from 22.10.0 to 23.8.0. ([\matrix-org#16235](matrix-org#16235)) * Bump types-pillow from 10.0.0.2 to 10.0.0.3. ([\matrix-org#16293](matrix-org#16293)) * Bump types-setuptools from 68.0.0.3 to 68.2.0.0. ([\matrix-org#16292](matrix-org#16292)) * Bump typing-extensions from 4.7.1 to 4.8.0. ([\matrix-org#16341](matrix-org#16341)) # -----BEGIN PGP SIGNATURE----- # # iQFEBAABCgAuFiEEBTGR3/RnAzBGUif3pULk7RsPrAkFAmUS8iEQHGVyaWtAbWF0 # cml4Lm9yZwAKCRClQuTtGw+sCXFgB/912+T+BydS290UECCXp9kpRB5xo3aWe8mX # NCx9Oor1TRLBpLhlQWk786gP1Q9JAQpmA4z6kovjKaLG1b4oLbZNjbPG4hEYc8ow # /rVzGor52pfyS7uS5GW+rRmapcw4AYND6hA9XGELupf2joC8LXioSCEVG4cxwD8E # IgIbLc87C7KpaUkNbDEz3jzZ3/BVRGcIYyhF3zTK2ZApvH2qsegq8wKYx4EYJnfh # 87DXtTCNwA+bW6XZYPtUwPKjZ+TGB11IizxmQySGLbAxvH+GUan8X8TizGyxaqaA # FDk3yMBbUo0R7ljDgL5YsZXT6qsZz+IBz/bsMzSbZ39f/yEUqHak # =1/pL # -----END PGP SIGNATURE----- # gpg: Signature made Tue Sep 26 16:00:49 2023 BST # gpg: using RSA key 053191DFF4670330465227F7A542E4ED1B0FAC09 # gpg: issuer "erik@matrix.org" # gpg: Can't check signature: No public key # Conflicts: # .github/workflows/docker.yml # .github/workflows/push_complement_image.yml # .github/workflows/release-artifacts.yml # .github/workflows/tests.yml # poetry.lock # synapse/appservice/scheduler.py # synapse/handlers/pagination.py # synapse/handlers/room.py # synapse/rest/client/account_data.py # tests/rest/client/test_receipts.py
Tracks presence on an individual per-device basis and combines the per-device state into a per-user state. This should help in situations where a user has two devices with conflicting status (e.g. one is syncing with unavailable and one is syncing with online).
The tie-breaking is done by priority:
Builds on #16170, #16171, #16172.