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clarify use of sleep in async_db

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This commit is contained in:
nathaniel 2019-04-15 10:02:57 -05:00
parent 09b0188ff9
commit 28d008e97c
2 changed files with 6 additions and 4 deletions
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8
async_db/src/db.rs
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@ -58,7 +58,7 @@ fn get_hottest_years(conn: Connection) -> Result<Vec<WeatherAgg>, Error> {
.collect::<Vec<WeatherAgg>>()) .collect::<Vec<WeatherAgg>>())
})?; })?;
sleep(Duration::from_secs(2)); sleep(Duration::from_secs(2)); //see comments at top of main.rs
Ok(annuals) Ok(annuals)
} }
@ -84,7 +84,7 @@ fn get_coldest_years(conn: Connection) -> Result<Vec<WeatherAgg>, Error> {
.collect::<Vec<WeatherAgg>>()) .collect::<Vec<WeatherAgg>>())
})?; })?;
sleep(Duration::from_secs(2)); sleep(Duration::from_secs(2)); //see comments at top of main.rs
Ok(annuals) Ok(annuals)
} }
@ -111,7 +111,7 @@ fn get_hottest_months(conn: Connection) -> Result<Vec<WeatherAgg>, Error> {
.collect::<Vec<WeatherAgg>>()) .collect::<Vec<WeatherAgg>>())
})?; })?;
sleep(Duration::from_secs(2)); sleep(Duration::from_secs(2)); //see comments at top of main.rs
Ok(annuals) Ok(annuals)
} }
@ -137,6 +137,6 @@ fn get_coldest_months(conn: Connection) -> Result<Vec<WeatherAgg>, Error> {
.collect::<Vec<WeatherAgg>>()) .collect::<Vec<WeatherAgg>>())
})?; })?;
sleep(Duration::from_secs(2)); sleep(Duration::from_secs(2)); //see comments at top of main.rs
Ok(annuals) Ok(annuals)
} }

2
async_db/src/main.rs
View File

@ -8,6 +8,8 @@ This project illustrates two examples:
2. An asynchronous handler that executes 4 queries in *parallel*, 2. An asynchronous handler that executes 4 queries in *parallel*,
collecting the results and returning them as a single serialized json object collecting the results and returning them as a single serialized json object
Note: The use of sleep(Duration::from_secs(2)); in db.rs is to make performance
improvement with parallelism more obvious.
*/ */
use std::io; use std::io;