feat: introduce TableNameCache & TableInfoCache & `TableRouteCach…

…e` (#3895)

* feat: implement the `TableNameCache`

* feat: implement the `TableInfoCache`

* feat: implement the `TableRouteCache`

* test: add tests for `TableInfoCache` & `TableRouteCache`

* chore: use `TableId`

src/common/meta/src/cache.rs

@@ -14,6 +14,11 @@
 
 mod container;
 mod flow;
+mod table;
 
 pub use container::{CacheContainer, Initializer, Invalidator, TokenFilter};
 pub use flow::{new_table_flownode_set_cache, TableFlownodeSetCache};
+pub use table::{
+    new_table_info_cache, new_table_name_cache, new_table_route_cache, TableInfoCache,
+    TableInfoCacheRef, TableNameCache, TableNameCacheRef, TableRouteCache, TableRouteCacheRef,
+};

src/common/meta/src/cache/container.rs

@@ -126,6 +126,15 @@ where
         Ok(())
     }
 
+    /// Returns true if the cache contains a value for the key.
+    pub fn contains_key<Q>(&self, key: &Q) -> bool
+    where
+        K: Borrow<Q>,
+        Q: Hash + Eq + ?Sized,
+    {
+        self.cache.contains_key(key)
+    }
+
     /// Returns a _clone_ of the value corresponding to the key.
     pub async fn get_by_ref<Q>(&self, key: &Q) -> Result<Option<V>>
     where

src/common/meta/src/cache/table.rs

@@ -0,0 +1,20 @@
+// 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.
+
+mod table_info;
+mod table_name;
+mod table_route;
+pub use table_info::{new_table_info_cache, TableInfoCache, TableInfoCacheRef};
+pub use table_name::{new_table_name_cache, TableNameCache, TableNameCacheRef};
+pub use table_route::{new_table_route_cache, TableRouteCache, TableRouteCacheRef};

src/common/meta/src/cache/table/table_info.rs

@@ -0,0 +1,121 @@
+// 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 std::sync::Arc;
+
+use futures::future::BoxFuture;
+use moka::future::Cache;
+use snafu::{OptionExt, ResultExt};
+use store_api::storage::TableId;
+use table::metadata::TableInfo;
+
+use crate::cache::{CacheContainer, Initializer};
+use crate::error;
+use crate::error::Result;
+use crate::instruction::CacheIdent;
+use crate::key::table_info::{TableInfoManager, TableInfoManagerRef};
+use crate::kv_backend::KvBackendRef;
+
+/// [TableInfoCache] caches the [TableId] to [TableInfo] mapping.
+pub type TableInfoCache = CacheContainer<TableId, Arc<TableInfo>, CacheIdent>;
+
+pub type TableInfoCacheRef = Arc<TableInfoCache>;
+
+/// Constructs a [TableInfoCache].
+pub fn new_table_info_cache(
+    name: String,
+    cache: Cache<TableId, Arc<TableInfo>>,
+    kv_backend: KvBackendRef,
+) -> TableInfoCache {
+    let table_info_manager = Arc::new(TableInfoManager::new(kv_backend));
+    let init = init_factory(table_info_manager);
+
+    CacheContainer::new(name, cache, Box::new(invalidator), init, Box::new(filter))
+}
+
+fn init_factory(table_info_manager: TableInfoManagerRef) -> Initializer<TableId, Arc<TableInfo>> {
+    Arc::new(move |table_id| {
+        let table_info_manager = table_info_manager.clone();
+        Box::pin(async move {
+            let raw_table_info = table_info_manager
+                .get(*table_id)
+                .await?
+                .context(error::ValueNotExistSnafu {})?
+                .into_inner()
+                .table_info;
+            Ok(Some(Arc::new(
+                TableInfo::try_from(raw_table_info).context(error::ConvertRawTableInfoSnafu)?,
+            )))
+        })
+    })
+}
+
+fn invalidator<'a>(
+    cache: &'a Cache<TableId, Arc<TableInfo>>,
+    ident: &'a CacheIdent,
+) -> BoxFuture<'a, Result<()>> {
+    Box::pin(async move {
+        if let CacheIdent::TableId(table_id) = ident {
+            cache.invalidate(table_id).await
+        }
+        Ok(())
+    })
+}
+
+fn filter(ident: &CacheIdent) -> bool {
+    matches!(ident, CacheIdent::TableId(_))
+}
+
+#[cfg(test)]
+mod tests {
+    use std::collections::HashMap;
+    use std::sync::Arc;
+
+    use moka::future::CacheBuilder;
+
+    use super::*;
+    use crate::ddl::test_util::create_table::test_create_table_task;
+    use crate::key::table_route::TableRouteValue;
+    use crate::key::TableMetadataManager;
+    use crate::kv_backend::memory::MemoryKvBackend;
+
+    #[tokio::test]
+    async fn test_cache() {
+        let mem_kv = Arc::new(MemoryKvBackend::default());
+        let table_metadata_manager = TableMetadataManager::new(mem_kv.clone());
+        let cache = CacheBuilder::new(128).build();
+        let cache = new_table_info_cache("test".to_string(), cache, mem_kv.clone());
+
+        let result = cache.get(1024).await.unwrap();
+        assert!(result.is_none());
+        let task = test_create_table_task("my_table", 1024);
+        table_metadata_manager
+            .create_table_metadata(
+                task.table_info.clone(),
+                TableRouteValue::physical(vec![]),
+                HashMap::new(),
+            )
+            .await
+            .unwrap();
+        let table_info = cache.get(1024).await.unwrap().unwrap();
+        assert_eq!(*table_info, TableInfo::try_from(task.table_info).unwrap());
+
+        assert!(cache.contains_key(&1024));
+        cache
+            .invalidate(&[CacheIdent::TableId(1024)])
+            .await
+            .unwrap();
+        assert!(!cache.contains_key(&1024));
+    }
+}

src/common/meta/src/cache/table/table_name.rs

@@ -0,0 +1,173 @@
+// 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 std::sync::Arc;
+
+use futures::future::BoxFuture;
+use moka::future::Cache;
+use snafu::OptionExt;
+use table::metadata::TableId;
+
+use crate::cache::{CacheContainer, Initializer};
+use crate::error;
+use crate::error::Result;
+use crate::instruction::CacheIdent;
+use crate::key::table_name::{TableNameKey, TableNameManager, TableNameManagerRef};
+use crate::kv_backend::KvBackendRef;
+use crate::table_name::TableName;
+
+/// [TableNameCache] caches the [TableName] to [TableId] mapping.
+pub type TableNameCache = CacheContainer<TableName, TableId, CacheIdent>;
+
+pub type TableNameCacheRef = Arc<TableNameCache>;
+
+/// Constructs a [TableNameCache].
+pub fn new_table_name_cache(
+    name: String,
+    cache: Cache<TableName, TableId>,
+    kv_backend: KvBackendRef,
+) -> TableNameCache {
+    let table_name_manager = Arc::new(TableNameManager::new(kv_backend));
+    let init = init_factory(table_name_manager);
+
+    CacheContainer::new(name, cache, Box::new(invalidator), init, Box::new(filter))
+}
+
+fn init_factory(table_name_manager: TableNameManagerRef) -> Initializer<TableName, TableId> {
+    Arc::new(
+        move |TableName {
+                  catalog_name,
+                  schema_name,
+                  table_name,
+              }| {
+            let table_name_manager = table_name_manager.clone();
+            Box::pin(async move {
+                Ok(Some(
+                    table_name_manager
+                        .get(TableNameKey {
+                            catalog: catalog_name,
+                            schema: schema_name,
+                            table: table_name,
+                        })
+                        .await?
+                        .context(error::ValueNotExistSnafu {})?
+                        .table_id(),
+                ))
+            })
+        },
+    )
+}
+
+fn invalidator<'a>(
+    cache: &'a Cache<TableName, TableId>,
+    ident: &'a CacheIdent,
+) -> BoxFuture<'a, Result<()>> {
+    Box::pin(async move {
+        if let CacheIdent::TableName(table_name) = ident {
+            cache.invalidate(table_name).await
+        }
+        Ok(())
+    })
+}
+
+fn filter(ident: &CacheIdent) -> bool {
+    matches!(ident, CacheIdent::TableName(_))
+}
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use common_catalog::consts::{DEFAULT_CATALOG_NAME, DEFAULT_SCHEMA_NAME};
+    use moka::future::CacheBuilder;
+
+    use super::*;
+    use crate::kv_backend::memory::MemoryKvBackend;
+    use crate::kv_backend::txn::TxnService;
+
+    #[tokio::test]
+    async fn test_cache_get() {
+        let mem_kv = Arc::new(MemoryKvBackend::default());
+        let cache = CacheBuilder::new(128).build();
+        let cache = new_table_name_cache("test".to_string(), cache, mem_kv.clone());
+        let result = cache
+            .get_by_ref(&TableName {
+                catalog_name: DEFAULT_CATALOG_NAME.to_string(),
+                schema_name: DEFAULT_SCHEMA_NAME.to_string(),
+                table_name: "my_table".to_string(),
+            })
+            .await
+            .unwrap();
+        assert!(result.is_none());
+        // Puts a new value.
+        let table_name_manager = TableNameManager::new(mem_kv.clone());
+        let table_id = 1024;
+        let txn = table_name_manager
+            .build_create_txn(
+                &TableNameKey {
+                    catalog: DEFAULT_CATALOG_NAME,
+                    schema: DEFAULT_SCHEMA_NAME,
+                    table: "my_table",
+                },
+                table_id,
+            )
+            .unwrap();
+        mem_kv.txn(txn).await.unwrap();
+        let got = cache
+            .get_by_ref(&TableName {
+                catalog_name: DEFAULT_CATALOG_NAME.to_string(),
+                schema_name: DEFAULT_SCHEMA_NAME.to_string(),
+                table_name: "my_table".to_string(),
+            })
+            .await
+            .unwrap()
+            .unwrap();
+        assert_eq!(got, table_id);
+    }
+
+    #[tokio::test]
+    async fn test_invalidate_cache() {
+        let mem_kv = Arc::new(MemoryKvBackend::default());
+        let cache = CacheBuilder::new(128).build();
+        let cache = new_table_name_cache("test".to_string(), cache, mem_kv.clone());
+        // Puts a new value.
+        let table_name_manager = TableNameManager::new(mem_kv.clone());
+        let table_id = 1024;
+        let table_name = TableName {
+            catalog_name: DEFAULT_CATALOG_NAME.to_string(),
+            schema_name: DEFAULT_SCHEMA_NAME.to_string(),
+            table_name: "my_table".to_string(),
+        };
+        let txn = table_name_manager
+            .build_create_txn(
+                &TableNameKey {
+                    catalog: DEFAULT_CATALOG_NAME,
+                    schema: DEFAULT_SCHEMA_NAME,
+                    table: "my_table",
+                },
+                table_id,
+            )
+            .unwrap();
+        mem_kv.txn(txn).await.unwrap();
+        let got = cache.get_by_ref(&table_name).await.unwrap().unwrap();
+        assert_eq!(got, table_id);
+
+        assert!(cache.contains_key(&table_name));
+        cache
+            .invalidate(&[CacheIdent::TableName(table_name.clone())])
+            .await
+            .unwrap();
+        assert!(!cache.contains_key(&table_name));
+    }
+}