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ingest.rs
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ingest.rs
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// Copyright 2023 Greptime Team
//
// 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 derive_new::new;
use greptimedb_ingester::api::v1::*;
use greptimedb_ingester::helpers::schema::*;
use greptimedb_ingester::helpers::values::*;
use greptimedb_ingester::{
ChannelConfig, ChannelManager, ClientBuilder, ClientTlsOption, Database, DEFAULT_SCHEMA_NAME,
};
#[tokio::main]
async fn main() {
let greptimedb_endpoint =
std::env::var("GREPTIMEDB_ENDPOINT").unwrap_or_else(|_| "localhost:4001".to_owned());
let greptimedb_dbname =
std::env::var("GREPTIMEDB_DBNAME").unwrap_or_else(|_| DEFAULT_SCHEMA_NAME.to_owned());
let greptimedb_secure = std::env::var("GREPTIMEDB_TLS")
.map(|s| s == "1")
.unwrap_or(false);
let builder = ClientBuilder::default()
.peers(vec![&greptimedb_endpoint])
.compression(greptimedb_ingester::Compression::Gzip);
let grpc_client = if greptimedb_secure {
let channel_config = ChannelConfig::default().client_tls_config(ClientTlsOption::default());
let channel_manager = ChannelManager::with_tls_config(channel_config)
.expect("Failed to create channel manager");
builder.channel_manager(channel_manager).build()
} else {
builder.build()
};
let client = Database::new_with_dbname(greptimedb_dbname, grpc_client);
let records = weather_records();
let result = client.row_insert(to_insert_request(records)).await;
match result {
Ok(rows) => {
println!("Rows written: {rows}");
}
Err(e) => {
eprintln!("Error: {e}");
}
};
}
#[derive(new)]
struct WeatherRecord {
timestamp_millis: i64,
collector: String,
temperature: f32,
humidity: i32,
}
fn weather_records() -> Vec<WeatherRecord> {
vec![
WeatherRecord::new(1686109527000, "c1".to_owned(), 26.4, 15),
WeatherRecord::new(1686023127000, "c1".to_owned(), 29.3, 20),
WeatherRecord::new(1685936727010, "c1".to_owned(), 31.8, 13),
WeatherRecord::new(1686109527000, "c2".to_owned(), 20.4, 67),
WeatherRecord::new(1686023127000, "c2".to_owned(), 18.0, 74),
WeatherRecord::new(1685936727000, "c2".to_owned(), 19.2, 81),
]
}
fn weather_schema() -> Vec<ColumnSchema> {
vec![
timestamp("ts", ColumnDataType::TimestampMillisecond),
tag("collector", ColumnDataType::String),
field("temperature", ColumnDataType::Float32),
field("humidity", ColumnDataType::Int32),
]
}
/// This function generates some random data and bundle them into a
/// `InsertRequest`.
///
/// Data structure:
///
/// - `ts`: a timestamp column
/// - `collector`: a tag column
/// - `temperature`: a value field of f32
/// - `humidity`: a value field of i32
///
fn to_insert_request(records: Vec<WeatherRecord>) -> RowInsertRequests {
let rows = records
.into_iter()
.map(|record| Row {
values: vec![
timestamp_millisecond_value(record.timestamp_millis),
string_value(record.collector),
f32_value(record.temperature),
i32_value(record.humidity),
],
})
.collect();
RowInsertRequests {
inserts: vec![RowInsertRequest {
table_name: "weather_demo".to_owned(),
rows: Some(Rows {
schema: weather_schema(),
rows,
}),
}],
}
}