Add sync API for raw client

Signed-off-by: xuhui-lu <luxuhui12345@126.com>

Author: xuhui-lu

Diff for: src/lib.rs

@@ -123,7 +123,9 @@ pub use crate::backoff::Backoff;
 #[doc(inline)]
 pub use crate::kv::{BoundRange, IntoOwnedRange, Key, KvPair, Value};
 #[doc(inline)]
-pub use crate::raw::{lowering as raw_lowering, Client as RawClient, ColumnFamily};
+pub use crate::raw::{
+    lowering as raw_lowering, Client as RawClient, ColumnFamily, SyncClient as SyncRawClient,
+};
 #[doc(inline)]
 pub use crate::request::RetryOptions;
 #[doc(inline)]

Diff for: src/raw/mod.rs

@@ -9,13 +9,14 @@
 //!
 //! **Warning:** It is not advisable to use both raw and transactional functionality in the same keyspace.
 
-pub use self::client::Client;
+pub use self::{client::Client, sync_client::SyncClient};
 use crate::Error;
 use std::{convert::TryFrom, fmt};
 
 mod client;
 pub mod lowering;
 mod requests;
+mod sync_client;
 
 /// A [`ColumnFamily`](ColumnFamily) is an optional parameter for [`raw::Client`](Client) requests.
 ///

Diff for: src/raw/sync_client.rs

@@ -0,0 +1,292 @@
+// Copyright 2019 TiKV Project Authors. Licensed under Apache-2.0.
+
+use crate::{
+    config::Config, raw::client::Client, BoundRange, ColumnFamily, Key, KvPair, Result, Value,
+};
+use futures::executor::block_on;
+use slog::{Drain, Logger};
+use std::u32;
+
+#[derive(Clone)]
+pub struct SyncClient {
+    client: Client,
+}
+
+impl SyncClient {
+    /// The synchronous version of RawClient
+    ///
+    /// # Examples
+    ///
+    /// ```rust,no_run
+    /// # use tikv_client::SyncRawClient;
+    /// let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// ```
+    pub fn new<S: Into<String>>(
+        pd_endpoints: Vec<S>,
+        logger: Option<Logger>,
+    ) -> Result<SyncClient> {
+        Self::new_with_config(pd_endpoints, Config::default(), logger)
+    }
+
+    /// Create a raw [`SyncClient`] with a custom configuration, and connect to the TiKV cluster.
+    ///
+    /// # Examples
+    ///
+    /// ```rust,no_run
+    /// # use tikv_client::{Config, SyncRawClient};
+    /// # use std::time::Duration;
+    /// let client = SyncRawClient::new_with_config(
+    ///     vec!["192.168.0.100"],
+    ///     Config::default().with_timeout(Duration::from_secs(60)),
+    ///     None,
+    /// ).unwrap();
+    /// ```
+    pub fn new_with_config<S: Into<String>>(
+        pd_endpoints: Vec<S>,
+        config: Config,
+        logger: Option<Logger>,
+    ) -> Result<SyncClient> {
+        let client = block_on(Client::new_with_config(pd_endpoints, config, logger)).unwrap();
+        Ok(SyncClient { client: client })
+    }
+
+    pub fn with_cf(&self, cf: ColumnFamily) -> SyncClient {
+        SyncClient {
+            client: self.client.with_cf(cf),
+        }
+    }
+
+    pub fn with_atomic_for_cas(&self) -> SyncClient {
+        SyncClient {
+            client: self.client.with_atomic_for_cas(),
+        }
+    }
+
+    /// Create a new 'get' request.
+    ///
+    /// Once resolved this request will result in the fetching of the value associated with the
+    /// given key.
+    ///
+    /// Retuning `Ok(None)` indicates the key does not exist in TiKV.
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{Value, Config, SyncRawClient};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let key = "TiKV".to_owned();
+    /// let req = client.get(key);
+    /// let result: Option<Value> = req.unwrap();
+    /// ```
+    pub fn get(&self, key: impl Into<Key>) -> Result<Option<Value>> {
+        block_on(self.client.get(key))
+    }
+
+    /// Create a new 'batch get' request.
+    ///
+    /// Once resolved this request will result in the fetching of the values associated with the
+    /// given keys.
+    ///
+    /// Non-existent entries will not appear in the result. The order of the keys is not retained in the result.
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{KvPair, Config, SyncRawClient};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let keys = vec!["TiKV".to_owned(), "TiDB".to_owned()];
+    /// let req = client.batch_get(keys);
+    /// let result: Vec<KvPair> = req.unwrap();
+    /// ```
+    pub fn batch_get(&self, keys: impl IntoIterator<Item = impl Into<Key>>) -> Result<Vec<KvPair>> {
+        block_on(self.client.batch_get(keys))
+    }
+
+    /// Create a new 'put' request.
+    ///
+    /// Once resolved this request will result in the setting of the value associated with the given key.
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{Key, Value, Config, SyncRawClient};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let key = "TiKV".to_owned();
+    /// let val = "TiKV".to_owned();
+    /// let req = client.put(key, val);
+    /// let result: () = req.unwrap();
+    /// ```
+    pub fn put(&self, key: impl Into<Key>, value: impl Into<Value>) -> Result<()> {
+        block_on(self.client.put(key, value))
+    }
+
+    /// Create a new 'batch put' request.
+    ///
+    /// Once resolved this request will result in the setting of the values associated with the given keys.
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{Result, KvPair, Key, Value, Config, SyncRawClient, IntoOwnedRange};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let kvpair1 = ("PD".to_owned(), "Go".to_owned());
+    /// let kvpair2 = ("TiKV".to_owned(), "Rust".to_owned());
+    /// let iterable = vec![kvpair1, kvpair2];
+    /// let req = client.batch_put(iterable);
+    /// let result: () = req.unwrap();
+    /// ```    
+    pub fn batch_put(&self, pairs: impl IntoIterator<Item = impl Into<KvPair>>) -> Result<()> {
+        block_on(self.client.batch_put(pairs))
+    }
+
+    /// Create a new 'delete' request.
+    ///
+    /// Once resolved this request will result in the deletion of the given key.
+    ///
+    /// It does not return an error if the key does not exist in TiKV.
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{Key, Config, SyncRawClient};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let key = "TiKV".to_owned();
+    /// let req = client.delete(key);
+    /// let result: () = req.unwrap();
+    /// ```
+    pub fn delete(&self, key: impl Into<Key>) -> Result<()> {
+        block_on(self.client.delete(key))
+    }
+
+    /// Create a new 'batch delete' request.
+    ///
+    /// Once resolved this request will result in the deletion of the given keys.
+    ///
+    /// It does not return an error if some of the keys do not exist and will delete the others.
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{Config, SyncRawClient};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let keys = vec!["TiKV".to_owned(), "TiDB".to_owned()];
+    /// let req = client.batch_delete(keys);
+    /// let result: () = req.unwrap();
+    /// ```
+    pub fn batch_delete(&self, keys: impl IntoIterator<Item = impl Into<Key>>) -> Result<()> {
+        block_on(self.client.batch_delete(keys))
+    }
+
+    /// Create a new 'delete range' request.
+    ///
+    /// Once resolved this request will result in the deletion of all keys lying in the given range.
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{Key, Config, SyncRawClient, IntoOwnedRange};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let inclusive_range = "TiKV"..="TiDB";
+    /// let req = client.delete_range(inclusive_range.into_owned());
+    /// let result: () = req.unwrap();
+    /// ```
+    pub fn delete_range(&self, range: impl Into<BoundRange>) -> Result<()> {
+        block_on(self.client.delete_range(range))
+    }
+
+    /// Create a new 'scan' request.
+    ///
+    /// Once resolved this request will result in a `Vec` of key-value pairs that lies in the specified range.
+    ///
+    /// If the number of eligible key-value pairs are greater than `limit`,
+    /// only the first `limit` pairs are returned, ordered by the key.
+    ///
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{KvPair, Config, SyncRawClient, IntoOwnedRange};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let inclusive_range = "TiKV"..="TiDB";
+    /// let req = client.scan(inclusive_range.into_owned(), 2);
+    /// let result: Vec<KvPair> = req.unwrap();
+    /// ```
+    pub fn scan(&self, range: impl Into<BoundRange>, limit: u32) -> Result<Vec<KvPair>> {
+        block_on(self.client.scan(range, limit))
+    }
+
+    /// Create a new 'scan' request that only returns the keys.
+    ///
+    /// Once resolved this request will result in a `Vec` of keys that lies in the specified range.
+    ///
+    /// If the number of eligible keys are greater than `limit`,
+    /// only the first `limit` pairs are returned, ordered by the key.
+    ///
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{Key, Config, SyncRawClient, IntoOwnedRange};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let inclusive_range = "TiKV"..="TiDB";
+    /// let req = client.scan_keys(inclusive_range.into_owned(), 2);
+    /// let result: Vec<Key> = req.unwrap();
+    /// ```
+    pub fn scan_keys(&self, range: impl Into<BoundRange>, limit: u32) -> Result<Vec<Key>> {
+        block_on(self.client.scan_keys(range, limit))
+    }
+
+    /// Create a new 'batch scan' request.
+    ///
+    /// Once resolved this request will result in a set of scanners over the given keys.
+    ///
+    /// **Warning**: This method is experimental. The `each_limit` parameter does not work as expected.
+    /// It does not limit the number of results returned of each range,
+    /// instead it limits the number of results in each region of each range.
+    /// As a result, you may get **more than** `each_limit` key-value pairs for each range.
+    /// But you should not miss any entries.
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{Key, Config, SyncRawClient, IntoOwnedRange};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let inclusive_range1 = "TiDB"..="TiKV";
+    /// let inclusive_range2 = "TiKV"..="TiSpark";
+    /// let iterable = vec![inclusive_range1.into_owned(), inclusive_range2.into_owned()];
+    /// let result = client.batch_scan(iterable, 2);
+    /// ```
+    pub fn batch_scan(
+        &self,
+        ranges: impl IntoIterator<Item = impl Into<BoundRange>>,
+        each_limit: u32,
+    ) -> Result<Vec<KvPair>> {
+        block_on(self.client.batch_scan(ranges, each_limit))
+    }
+
+    /// Create a new 'batch scan' request that only returns the keys.
+    ///
+    /// Once resolved this request will result in a set of scanners over the given keys.
+    ///
+    /// **Warning**: This method is experimental.
+    /// The `each_limit` parameter does not limit the number of results returned of each range,
+    /// instead it limits the number of results in each region of each range.
+    /// As a result, you may get **more than** `each_limit` key-value pairs for each range,
+    /// but you should not miss any entries.
+    ///
+    /// # Examples
+    /// ```rust,no_run
+    /// # use tikv_client::{Key, Config, SyncRawClient, IntoOwnedRange};
+    /// # let client = SyncRawClient::new(vec!["192.168.0.100"], None).unwrap();
+    /// let inclusive_range1 = "TiDB"..="TiKV";
+    /// let inclusive_range2 = "TiKV"..="TiSpark";
+    /// let iterable = vec![inclusive_range1.into_owned(), inclusive_range2.into_owned()];
+    /// let result = client.batch_scan(iterable, 2);
+    /// ```
+    pub fn batch_scan_keys(
+        &self,
+        ranges: impl IntoIterator<Item = impl Into<BoundRange>>,
+        each_limit: u32,
+    ) -> Result<Vec<Key>> {
+        block_on(self.client.batch_scan_keys(ranges, each_limit))
+    }
+
+    pub fn compare_and_swap(
+        &self,
+        key: impl Into<Key>,
+        previous_value: impl Into<Option<Value>>,
+        new_value: impl Into<Value>,
+    ) -> Result<(Option<Value>, bool)> {
+        block_on(self.client.compare_and_swap(key, previous_value, new_value))
+    }
+}