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redis_operation_state.rs
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redis_operation_state.rs
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// Copyright 2024 The NativeLink Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::str::FromStr;
use std::sync::Arc;
use std::time::SystemTime;
use futures::join;
use nativelink_error::{make_input_err, Error};
use nativelink_util::action_messages::{
ActionInfo, ActionInfoHashKey, ActionResult, ActionStage, ActionState, OperationId, WorkerId,
};
use nativelink_util::background_spawn;
use nativelink_util::buf_channel::make_buf_channel_pair;
use nativelink_util::store_trait::StoreSubscription;
use redis_macros::{FromRedisValue, ToRedisArgs};
use serde::{Deserialize, Serialize};
use tokio::sync::watch;
use tonic::async_trait;
use crate::operation_state_manager::{ActionStateResult, OperationStageFlags};
#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
enum OperationStage {
CacheCheck,
Queued,
Executing,
Completed,
Unknown,
}
fn _parse_stage_flags(flags: &OperationStageFlags) -> Vec<OperationStage> {
if flags.contains(OperationStageFlags::Any) {
return Vec::from([
OperationStage::CacheCheck,
OperationStage::Queued,
OperationStage::Executing,
OperationStage::Completed,
OperationStage::Unknown,
]);
}
let mut stage_vec = Vec::new();
if flags.contains(OperationStageFlags::CacheCheck) {
stage_vec.push(OperationStage::CacheCheck)
}
if flags.contains(OperationStageFlags::Executing) {
stage_vec.push(OperationStage::Executing)
}
if flags.contains(OperationStageFlags::Completed) {
stage_vec.push(OperationStage::Completed)
}
if flags.contains(OperationStageFlags::Queued) {
stage_vec.push(OperationStage::Queued)
}
stage_vec
}
pub struct RedisOperationState {
rx: watch::Receiver<Arc<ActionState>>,
inner: RedisOperation,
}
impl RedisOperationState {
fn _new(inner: RedisOperation, mut subscription: Box<dyn StoreSubscription>) -> Self {
let (tx, rx) = watch::channel(inner.as_state().unwrap());
let _join_handle = background_spawn!("redis_subscription_watcher", async move {
loop {
let Ok(item) = subscription.changed().await else {
return;
};
let (mut data_tx, mut data_rx) = make_buf_channel_pair();
// If get fails then we drop the tx.
let (res, data_res) = join!(
async move { item.get(&mut data_tx).await },
data_rx.consume(None)
);
if let Err(_e) = res {
todo!()
}
let Ok(data) = data_res else { todo!() };
let slice = &data[..];
let state: Arc<ActionState> = RedisOperation::from_slice(slice).as_state().unwrap();
let _ = tx.send(state).map_err(|_| todo!());
}
});
Self { rx, inner }
}
}
#[async_trait]
impl ActionStateResult for RedisOperationState {
async fn as_state(&self) -> Result<Arc<ActionState>, Error> {
Ok(Arc::new(self.inner.clone().try_into()?))
}
async fn as_receiver(&self) -> Result<&'_ watch::Receiver<Arc<ActionState>>, Error> {
Ok(&self.rx)
}
async fn as_action_info(&self) -> Result<Arc<ActionInfo>, Error> {
Ok(Arc::new(self.inner.info.clone()))
}
}
#[derive(Serialize, Deserialize, Clone, Debug, ToRedisArgs, FromRedisValue)]
pub struct RedisOperation {
operation_id: OperationId,
info: ActionInfo,
worker_id: Option<WorkerId>,
result: Option<ActionResult>,
stage: OperationStage,
last_worker_update: Option<SystemTime>,
last_client_update: Option<SystemTime>,
last_error: Option<Error>,
completed_at: Option<SystemTime>,
}
impl RedisOperation {
pub fn as_json(&self) -> String {
serde_json::json!(&self).to_string()
}
pub fn from_slice(s: &[u8]) -> Self {
serde_json::from_slice(s).unwrap()
}
pub fn new(info: ActionInfo, operation_id: OperationId) -> Self {
Self {
operation_id,
info,
worker_id: None,
result: None,
stage: OperationStage::CacheCheck,
last_worker_update: None,
last_client_update: None,
last_error: None,
completed_at: None,
}
}
pub fn from_existing(existing: RedisOperation, operation_id: OperationId) -> Self {
Self {
operation_id,
info: existing.info,
worker_id: existing.worker_id,
result: existing.result,
stage: existing.stage,
last_worker_update: existing.last_worker_update,
last_client_update: existing.last_client_update,
last_error: existing.last_error,
completed_at: existing.completed_at,
}
}
pub fn as_state(&self) -> Result<Arc<ActionState>, Error> {
let action_state = ActionState {
stage: self.action_stage()?,
id: self.operation_id.clone(),
};
Ok(Arc::new(action_state))
}
pub fn action_stage(&self) -> Result<ActionStage, Error> {
match self.stage {
OperationStage::CacheCheck => Ok(ActionStage::CacheCheck),
OperationStage::Queued => Ok(ActionStage::Queued),
OperationStage::Executing => Ok(ActionStage::Executing),
OperationStage::Unknown => Ok(ActionStage::Unknown),
OperationStage::Completed => {
let Some(result) = &self.result else {
return Err(make_input_err!(
"Operation {} was marked as completed but has no result",
self.operation_id.to_string()
));
};
Ok(ActionStage::Completed(result.clone()))
}
}
}
fn _unique_qualifier(&self) -> &ActionInfoHashKey {
&self.operation_id.unique_qualifier
}
}
impl FromStr for RedisOperation {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
serde_json::from_str(s).map_err(|e| {
make_input_err!(
"Decode string to RedisOperation failed with error: {}",
e.to_string()
)
})
}
}
impl TryFrom<RedisOperation> for ActionState {
type Error = Error;
fn try_from(value: RedisOperation) -> Result<Self, Self::Error> {
Ok(ActionState {
id: value.operation_id.clone(),
stage: value.action_stage()?,
})
}
}