| Commit message (Collapse) | Author | Age | Files | Lines |
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message_update dispatch
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This reverts commit 27ccf2c9c8ce785b54595eaabcebf86db07bf5bc.
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On certain feature combinations, compilation and tests would not function
correctly.
This commit goes through a number of feature combinations and gates some tests
behind the required features and fixes other compilation errors.
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Fix the dispatch functionality potentially deadlocking when a deadlock has
occurred elsewhere (or a read/write lock is forever held elsewhere), and log
when it happens, WARNing the user that a possible deadlock has happened.
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When the cache is enabled, don't delay the Ready until all guilds have been
received.
This never really worked in the first place and duplicates the "cached" logic
that fires when all guilds have been received.
This presumably fixes the "silent death" bug, as this appears to stall the
thread on certain conditions.
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This adds an API for message caching. By default this caches 0 messages per
channel.
This can be customized when instantiating:
```rust
use serenity::cache::{Cache, Settings};
let mut settings = Settings::new();
// Cache 10 messages per channel.
settings.max_messages(10);
let cache = Cache::new_with_settings(settings);
```
After instantiation:
```rust
use serenity::cache::Cache;
let mut cache = Cache::new();
cache.settings_mut().max_messages(10);
```
And during runtime through the global cache:
```rust
use serenity::CACHE;
CACHE.write().settings_mut().max_messages(10);
```
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Fixes panics for Guild Member Update dispatches, a retrieval for the
new version of the member sooner and checking that the member exists
prior to dispatching.
Closes #264.
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Instead of communicating over the gateway in a split form of a
`serde_json::Value` or a `client::bridge::gateway::ShardClientMessage`,
wrap them both into a single enum for better interaction between the
client, gateway, and voice modules.
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Add an event in the EventHandler to be called when a shard updates its
Connection Stage.
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Fix clippy lints and subsequently accept references for more function
parameters.
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The `model` module has historically been one giant module re-exporting
all of the model types, which is somewhere around 100 types. This can be
a lot to look at for a new user and somewhat overwhelming, especially
with a large number of fine-grained imports from the module.
The module is now neatly split up into submodules, mostly like it has
been internally since the early versions of the library. The submodules
are:
- application
- channel
- error
- event
- gateway
- guild
- id
- invite
- misc
- permissions
- prelude
- user
- voice
- webhook
Each submodule contains types that are "owned" by the module. For
example, the `guild` submodule contains, but not limited to, Emoji,
AuditLogsEntry, Role, and Member. `channel` contains, but not limited
to, Attachment, Embed, Message, and Reaction.
Upgrade path:
Instead of glob importing the models via `use serenity::model::*;`,
instead glob import via the prelude:
```rust
use serenity::model::prelude::*;
```
Instead of importing from the root model module:
```rust
use serenity::model::{Guild, Message, OnlineStatus, Role, User};
```
instead import from the submodules like so:
```rust
use serenity::model::channel::Message;
use serenity::model::guild::{Guild, Role};
use serenity::model::user::{OnlineStatus, User};
```
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Instead of executing framework commands in the shard runner thread
(potentially blocking the shard runner from reading new messages over
the websocket and heartbeating), dispatch framework commands to the
shard runner's threadpool.
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This commit is a rewrite of the client module's internals and the
gateway.
The main benefit of this is that there is either 0 or 1 lock retrievals
per event received, and the ability to utilize the ShardManager both
internally and in userland code has been improved.
The primary rework is in the `serenity::client` module, which now
includes a few more structures, some changes to existing ones, and more
functionality (such as to the `ShardManager`).
The two notable additions to the client-gateway bridge are the
`ShardMessenger` and `ShardManagerMonitor`.
The `ShardMessenger` is a simple-to-use interface for users to use to
interact with shards. The user is given one of these in the
`serenity::client::Context` in dispatches to the
`serenity::client::EventHandler`. This can be used for updating the
presence of a shard, sending a guild chunk message, or sending a user's
defined WebSocket message.
The `ShardManagerMonitor` is a loop run in its own thread, potentially
the main thread, that is responsible for receiving messages over an mpsc
channel on what to do with shards via the `ShardManager`. For example,
it will receive a message to shutdown a single shard, restart a single
shard, or shutdown the entire thing.
Users, in most applications, will not interact with the
`ShardManagerMonitor`. Users using the `serenity::client::Client`
interact with only the `ShardMessenger`.
The `ShardManager` is now usable by the user and is available to them,
and contains public functions for shutdowns, initializations, restarts,
and complete shutdowns of shards. It contains utility functions like
determining whether the `ShardManager` is responsible for a shard of a
given ID and the IDs of shards currently active (having an associated
`ShardRunner`). It can be found on
`serenity::client::Client::shard_manager`.
Speaking of the `ShardRunner`, it no longer owns a clone of an Arc to
its assigned `serenity::gateway::Shard`. It now completely owns the
Shard. This means that in order to open the shard, a `ShardRunner` no
longer has to repeatedly retrieve a lock to it. This reduces the number
of lock retrievals per event dispatching cycle from 3 or 4 depending on
event type to 0 or 1 depending on whether it's a message create _and_ if
the framework is in use. To interact with the Shard, one must now go
through the previously mentioned `ShardMessenger`, which the
`ShardRunner` will check for messages from on a loop.
`serenity::client::Context` is now slightly different. Instead of the
`shard` field being `Arc<Mutex<Shard>>`, it is an instance of a
`ShardMessenger`. The interface is the same (minus losing some
Shard-specific methods like `latency`), and `Context`'s shortcuts still
exist (like `Context::online` or `Context::set_game`). It now
additionally includes a `Context::shard_id` field which is a u64
containing the ID of the shard that the event was dispatched from.
`serenity::client::Client` has one changed field name, one field that is
now public, and a new field. `Client::shard_runners` is now
`Client::shard_manager` of type `Arc<Mutex<ShardManager>>`. The
`Client::token` field is now public. This can, for example, be mutated
on token resets if you know what you're doing. `Client::ws_uri` is new
and contains the URI for shards to use when connecting to the gateway.
Otherwise, the Client's usage is unchanged.
`serenity::gateway::Shard` has a couple of minor changes and many more
public methods and fields. The `autoreconnect`, `check_heartbeat`,
`handle_event`, `heartbeat`, `identify`, `initialize`, `reset`,
`resume`, `reconnect`, and `update_presence` methods are now public. The
`token` structfield is now public. There are new getters for various
structfields, such as `heartbeat_instants` and `last_heartbeat_ack`.
The breaking change on the `Shard` is that `Shard::handle_event` now
takes an event by reference and, instead of returning
`Result<Option<Event>>`, it now returns `Result<Option<ShardAction>>`.
`serenity::gateway::ShardAction` is a light enum determining an action
that someone _should_/_must_ perform on the shard, e.g. reconnecting or
identifying. This is determined by `Shard::handle_event`.
In total, there aren't too many breaking changes that most of userland
use cases has to deal with -- at most, changing some usage of `Context`.
Retrieving information like a Shard's latency is currently not possible
anymore but work will be done to make this functionality available
again.
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It was voted that the `on_` prefix is unnecessary, so these have been
dropped.
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A threadpool will help with giving event dispatches a threaded behaviour
while still allowing the library the ability to perform other actions,
such as receiving new events and heartbeating over the websocket client.
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Switch to the `parking_lot` crate's implementations of
`std::sync::Mutex` and `std::sync::RwLock`, which are more efficient.
A writeup on why `parking_lot` is more efficient can be read here:
<https://github.com/Amanieu/parking_lot>
Upgrade path:
Modify `mutex.lock().unwrap()` usage to `mutex.lock()` (not needing to
unwrap or handle a result), and
`rwlock.read().unwrap()`/`rwlock.write().unwrap()` usage to
`rwlock.read()` and `rwlock.write()`.
For example, modify:
```rust
use serenity::CACHE;
println!("{}", CACHE.read().unwrap().user.id);
```
to:
```rust
use serenity::CACHE;
println!("{}", CACHE.read().user.id);
```
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A threadpool will help with giving event dispatches a threaded behaviour
while still allowing the library the ability to perform other actions,
such as receiving new events and heartbeating over the websocket client.
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When spawning multiple shards (via an equal number of futures - one
per shard) joined on a core.run use, the very first future executed
would block forever due to a sync, blocking `monitor_shard` use. While
this defeats the purpose of tokio, this was meant to be a first step to
an async serenity implementation.
To "fix" this blocking call until a deeper async implementation is made,
spawn a new thread per tokio core (and thus per shard). This causes the
same expected behaviour, just with multiple threads like before.
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This fixes compilation errors and warnings when compiling a mixture of
non-default feature targets.
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Also not quite sure if they goofed rustfmt or something, but its changes it did were a bit bizarre.
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The framework is now moved in its entirity to the `framework` module,
with the `Framework` trait currently on its own and the builtin
implementation provided.
The builtin implementation has been renamed to "Standard".
Upgrade path:
Rename the `BuiltinFramework` import to `StandardFramework`. Instead of
importing builtin framework items from `serenity::framework`, import
them from `serenity::framework::standard`.
This is the beginning to #60. The root `framework` module (non-standard
implementation) will be built more by the time it's closed.
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