Batch write support (#87)

* (feat) add support for batching writes

* (refactor) hold precision in WriteQuery type

* (test) fix test for new query type enum

* (test) add test for batch query

* (chore) stick to influxdb 1.8 for integration test

* (fix) fix lint warnings

Author: sunng87

.github/workflows/rust.yml

@@ -50,11 +50,11 @@ jobs:
         runs-on: ubuntu-latest
         services:
             influxdb:
-                image: influxdb
+                image: influxdb:1.8
                 ports:
                     - 8086:8086
             authed_influxdb:
-                image: influxdb
+                image: influxdb:1.8
                 ports:
                     - 9086:8086
                 env:
@@ -68,17 +68,17 @@ jobs:
             - uses: actions/checkout@v1
             - uses: dtolnay/rust-toolchain@stable
             - run: cargo test --package influxdb --package influxdb_derive --all-features --no-fail-fast
-    
+
     coverage:
         name: Code Coverage (stable/ubuntu-20.04)
         runs-on: ubuntu-20.04
         services:
             influxdb:
-                image: influxdb
+                image: influxdb:1.8
                 ports:
                     - 8086:8086
             authed_influxdb:
-                image: influxdb
+                image: influxdb:1.8
                 ports:
                     - 9086:8086
                 env:
@@ -87,19 +87,19 @@ jobs:
                     INFLUXDB_ADMIN_PASSWORD: password
                     INFLUXDB_USER: nopriv_user
                     INFLUXDB_USER_PASSWORD: password
-        
+
         steps:
           - uses: actions/checkout@v2
           - uses: dtolnay/rust-toolchain@stable
-          
+
           - name: Get Rust Version
             id: rust-version
             run: echo "::set-output name=VERSION::$(cargo -V | head -n1 | awk '{print $2}')"
-          
+
           - name: Get Tarpaulin Version
             id: tarpaulin-version
             run: echo "::set-output name=VERSION::$(wget -qO- 'https://api.github.com/repos/xd009642/tarpaulin/releases/latest' | jq -r '.tag_name')"
-          
+
           - uses: actions/cache@v2
             with:
               path: |
@@ -108,12 +108,12 @@ jobs:
                 ~/.cargo/registry
                 target
               key: ${{ runner.os }}-cargo-${{ steps.rust-version.outputs.VERSION }}-tarpaulin-${{ steps.tarpaulin-version.outputs.VERSION }} }}
-          
+
           - name: Install Tarpaulin
             run: |
               ls -lh ~/.cargo/bin
               test -e ~/.cargo/bin/cargo-tarpaulin || cargo install cargo-tarpaulin --version ${{ steps.tarpaulin-version.outputs.VERSION }}
-          
+
           - name: Run Tarpaulin coverage tests
             run: |
               cargo tarpaulin -v \
@@ -127,14 +127,14 @@ jobs:
             env:
               RUST_BACKTRACE: 1
               RUST_LOG: info
-          
+
           - uses: actions/upload-artifact@v2
             with:
               name: tarpaulin-report
               path: |
                 tarpaulin-report.json
                 tarpaulin-report.html
-    
+
     pages:
         runs-on: ubuntu-20.04
         needs:
@@ -144,19 +144,19 @@ jobs:
           - uses: actions/checkout@v2
             with:
               ref: gh-pages
-          
+
           - uses: actions/download-artifact@v2
             with:
               name: tarpaulin-report
-          
+
           - run: |
               coverage=$(jq '.files | { covered: map(.covered) | add, coverable: map(.coverable) | add } | .covered / .coverable * 10000 | round | . / 100' tarpaulin-report.json)
               color=$([[ $coverage < 80 ]] && printf yellow || printf brightgreen)
               wget -qO coverage.svg "https://img.shields.io/badge/coverage-$coverage%25-$color"
-              
+
               git add coverage.svg tarpaulin-report.html
               git status
-          
+
           - uses: stefanzweifel/git-auto-commit-action@v4
             with:
               commit_message: "GitHub Pages for ${{ github.sha }}"

influxdb/src/client/mod.rs

@@ -18,7 +18,7 @@
 use futures::prelude::*;
 use surf::{self, Client as SurfClient, StatusCode};
 
-use crate::query::QueryTypes;
+use crate::query::QueryType;
 use crate::Error;
 use crate::Query;
 use std::collections::HashMap;
@@ -159,14 +159,13 @@ impl Client {
     pub async fn query<'q, Q>(&self, q: &'q Q) -> Result<String, Error>
     where
         Q: Query,
-        &'q Q: Into<QueryTypes<'q>>,
     {
         let query = q.build().map_err(|err| Error::InvalidQueryError {
             error: err.to_string(),
         })?;
 
-        let request_builder = match q.into() {
-            QueryTypes::Read(_) => {
+        let request_builder = match q.get_type() {
+            QueryType::ReadQuery => {
                 let read_query = query.get();
                 let url = &format!("{}/query", &self.url);
                 let mut parameters = self.parameters.as_ref().clone();
@@ -178,10 +177,10 @@ impl Client {
                     self.client.post(url).query(&parameters)
                 }
             }
-            QueryTypes::Write(write_query) => {
+            QueryType::WriteQuery(precision) => {
                 let url = &format!("{}/write", &self.url);
                 let mut parameters = self.parameters.as_ref().clone();
-                parameters.insert("precision", write_query.get_precision());
+                parameters.insert("precision", precision);
 
                 self.client.post(url).body(query.get()).query(&parameters)
             }

influxdb/src/integrations/serde_integration/de.rs

@@ -22,11 +22,11 @@ where
             Name,
             Columns,
             Values,
-        };
+        }
 
         struct SeriesVisitor<T> {
             _inner_type: PhantomData<T>,
-        };
+        }
 
         impl<'de, T> Visitor<'de> for SeriesVisitor<T>
         where
@@ -115,12 +115,12 @@ where
             Tags,
             Columns,
             Values,
-        };
+        }
 
         struct SeriesVisitor<TAG, T> {
             _tag_type: PhantomData<TAG>,
             _value_type: PhantomData<T>,
-        };
+        }
 
         impl<'de, TAG, T> Visitor<'de> for SeriesVisitor<TAG, T>
         where

influxdb/src/lib.rs

@@ -82,7 +82,7 @@ pub use error::Error;
 pub use query::{
     read_query::ReadQuery,
     write_query::{Type, WriteQuery},
-    InfluxDbWriteable, Query, QueryType, QueryTypes, Timestamp, ValidQuery,
+    InfluxDbWriteable, Query, QueryType, Timestamp, ValidQuery,
 };
 
 #[cfg(feature = "use-serde")]

influxdb/src/query/mod.rs

@@ -55,9 +55,9 @@ impl fmt::Display for Timestamp {
     }
 }
 
-impl Into<DateTime<Utc>> for Timestamp {
-    fn into(self) -> DateTime<Utc> {
-        match self {
+impl From<Timestamp> for DateTime<Utc> {
+    fn from(ts: Timestamp) -> DateTime<Utc> {
+        match ts {
             Timestamp::Hours(h) => {
                 let nanos =
                     h * MINUTES_PER_HOUR * SECONDS_PER_MINUTE * MILLIS_PER_SECOND * NANOS_PER_MILLI;
@@ -93,24 +93,6 @@ where
     }
 }
 
-/// Internal enum used to represent either type of query.
-pub enum QueryTypes<'a> {
-    Read(&'a ReadQuery),
-    Write(&'a WriteQuery),
-}
-
-impl<'a> From<&'a ReadQuery> for QueryTypes<'a> {
-    fn from(query: &'a ReadQuery) -> Self {
-        Self::Read(query)
-    }
-}
-
-impl<'a> From<&'a WriteQuery> for QueryTypes<'a> {
-    fn from(query: &'a WriteQuery) -> Self {
-        Self::Write(query)
-    }
-}
-
 pub trait Query {
     /// Builds valid InfluxSQL which can be run against the Database.
     /// In case no fields have been specified, it will return an error,
@@ -192,7 +174,8 @@ impl PartialEq<&str> for ValidQuery {
 #[derive(PartialEq, Debug)]
 pub enum QueryType {
     ReadQuery,
-    WriteQuery,
+    /// write query with precision
+    WriteQuery(String),
 }
 
 #[cfg(test)]

influxdb/src/query/write_query.rs

@@ -205,7 +205,29 @@ impl Query for WriteQuery {
     }
 
     fn get_type(&self) -> QueryType {
-        QueryType::WriteQuery
+        QueryType::WriteQuery(self.get_precision())
+    }
+}
+
+impl Query for Vec<WriteQuery> {
+    fn build(&self) -> Result<ValidQuery, Error> {
+        let mut qlines = Vec::new();
+
+        for q in self {
+            let valid_query = q.build()?;
+            qlines.push(valid_query.0);
+        }
+
+        Ok(ValidQuery(qlines.join("\n")))
+    }
+
+    fn get_type(&self) -> QueryType {
+        QueryType::WriteQuery(
+            self.get(0)
+                .map(|q| q.get_precision())
+                // use "ms" as placeholder if query is empty
+                .unwrap_or_else(|| "ms".to_owned()),
+        )
     }
 }
 
@@ -296,7 +318,7 @@ mod tests {
             .add_tag("location", "us-midwest")
             .add_tag("season", "summer");
 
-        assert_eq!(query.get_type(), QueryType::WriteQuery);
+        assert_eq!(query.get_type(), QueryType::WriteQuery("h".to_owned()));
     }
 
     #[test]
@@ -318,4 +340,25 @@ mod tests {
             r#"wea\,\ ther=,location=us-midwest,loc\,\ \="ation=us\,\ \"mid\=west temperature=82i,"temp\=era\,t\ ure"="too\"\\\\hot",float=82 11"#
         );
     }
+
+    #[test]
+    fn test_batch() {
+        let q0 = Timestamp::Hours(11)
+            .into_query("weather")
+            .add_field("temperature", 82)
+            .add_tag("location", "us-midwest");
+
+        let q1 = Timestamp::Hours(12)
+            .into_query("weather")
+            .add_field("temperature", 65)
+            .add_tag("location", "us-midwest");
+
+        let query = vec![q0, q1].build();
+
+        assert_eq!(
+            query.unwrap().get(),
+            r#"weather,location=us-midwest temperature=82i 11
+weather,location=us-midwest temperature=65i 12"#
+        );
+    }
 }

influxdb/tests/integration_tests.rs

@@ -57,10 +57,10 @@ async fn test_connection_error() {
     assert_result_err(&read_result);
     match read_result {
         Err(Error::ConnectionError { .. }) => {}
-        _ => panic!(format!(
+        _ => panic!(
             "Should cause a ConnectionError: {}",
             read_result.unwrap_err()
-        )),
+        ),
     }
 }
 
@@ -139,21 +139,21 @@ async fn test_wrong_authed_write_and_read() {
             assert_result_err(&write_result);
             match write_result {
                 Err(Error::AuthorizationError) => {}
-                _ => panic!(format!(
+                _ => panic!(
                     "Should be an AuthorizationError: {}",
                     write_result.unwrap_err()
-                )),
+                ),
             }
 
             let read_query = Query::raw_read_query("SELECT * FROM weather");
             let read_result = client.query(&read_query).await;
             assert_result_err(&read_result);
             match read_result {
                 Err(Error::AuthorizationError) => {}
-                _ => panic!(format!(
+                _ => panic!(
                     "Should be an AuthorizationError: {}",
                     read_result.unwrap_err()
-                )),
+                ),
             }
 
             let client = Client::new("http://localhost:9086", TEST_NAME)
@@ -163,10 +163,10 @@ async fn test_wrong_authed_write_and_read() {
             assert_result_err(&read_result);
             match read_result {
                 Err(Error::AuthenticationError) => {}
-                _ => panic!(format!(
+                _ => panic!(
                     "Should be an AuthenticationError: {}",
                     read_result.unwrap_err()
-                )),
+                ),
             }
         },
         || async move {
@@ -207,21 +207,21 @@ async fn test_non_authed_write_and_read() {
             assert_result_err(&write_result);
             match write_result {
                 Err(Error::AuthorizationError) => {}
-                _ => panic!(format!(
+                _ => panic!(
                     "Should be an AuthorizationError: {}",
                     write_result.unwrap_err()
-                )),
+                ),
             }
 
             let read_query = Query::raw_read_query("SELECT * FROM weather");
             let read_result = non_authed_client.query(&read_query).await;
             assert_result_err(&read_result);
             match read_result {
                 Err(Error::AuthorizationError) => {}
-                _ => panic!(format!(
+                _ => panic!(
                     "Should be an AuthorizationError: {}",
                     read_result.unwrap_err()
-                )),
+                ),
             }
         },
         || async move {