mirror of https://github.com/tikv/client-rust.git
90 lines
2.9 KiB
Rust
90 lines
2.9 KiB
Rust
// Copyright 2018 TiKV Project Authors. Licensed under Apache-2.0.
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mod common;
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use crate::common::parse_args;
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use futures::prelude::*;
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use std::ops::RangeBounds;
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use tikv_client::{Config, Key, KvPair, TransactionClient as Client, Value};
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async fn puts(client: &Client, pairs: impl IntoIterator<Item = impl Into<KvPair>>) {
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let mut txn = client.begin().await.expect("Could not begin a transaction");
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for pair in pairs {
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let (key, value) = pair.into().into();
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txn.set(key, value);
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}
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txn.commit().await.expect("Could not commit transaction");
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}
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async fn get(client: &Client, key: Key) -> Option<Value> {
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let txn = client.begin().await.expect("Could not begin a transaction");
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txn.get(key).await.expect("Could not get value")
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}
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// Ignore a spurious warning from rustc (https://github.com/rust-lang/rust/issues/60566).
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#[allow(unused_mut)]
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async fn scan(client: &Client, range: impl RangeBounds<Key>, mut limit: usize) {
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let mut txn = client.begin().await.expect("Could not begin a transaction");
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txn.scan(range)
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.into_stream()
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.take_while(move |r| {
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assert!(r.is_ok(), "Could not scan keys");
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future::ready(if limit == 0 {
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false
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} else {
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limit -= 1;
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true
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})
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})
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.for_each(|pair| future::ready(println!("{:?}", pair)))
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.await;
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}
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async fn dels(client: &Client, keys: impl IntoIterator<Item = Key>) {
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let mut txn = client.begin().await.expect("Could not begin a transaction");
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for key in keys {
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txn.delete(key);
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}
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txn.commit().await.expect("Could not commit transaction");
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}
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#[runtime::main(runtime_tokio::Tokio)]
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async fn main() {
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// You can try running this example by passing your pd endpoints
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// (and SSL options if necessary) through command line arguments.
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let args = parse_args("txn");
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// Create a configuration to use for the example.
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// Optionally encrypt the traffic.
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let config = if let (Some(ca), Some(cert), Some(key)) = (args.ca, args.cert, args.key) {
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Config::new(args.pd).with_security(ca, cert, key)
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} else {
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Config::new(args.pd)
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};
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let txn = Client::new(config)
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.await
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.expect("Could not connect to tikv");
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// set
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let key1: Key = b"key1".to_vec().into();
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let value1: Value = b"value1".to_vec().into();
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let key2: Key = b"key2".to_vec().into();
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let value2: Value = b"value2".to_vec().into();
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puts(&txn, vec![(key1, value1), (key2, value2)]).await;
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// get
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let key1: Key = b"key1".to_vec().into();
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let value1 = get(&txn, key1.clone()).await;
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println!("{:?}", (key1, value1));
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// scan
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let key1: Key = b"key1".to_vec().into();
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scan(&txn, key1.., 10).await;
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// delete
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let key1: Key = b"key1".to_vec().into();
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let key2: Key = b"key2".to_vec().into();
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dels(&txn, vec![key1, key2]).await;
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}
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