feat: introduce the PluginOptions (#4835)

* feat: introduce the `PluginOptions`

* chore: apply suggestions from CR

src/plugins/Cargo.toml

@@ -13,4 +13,5 @@ common-base.workspace = true
 datanode.workspace = true
 frontend.workspace = true
 meta-srv.workspace = true
+serde.workspace = true
 snafu.workspace = true

src/plugins/src/datanode.rs

@@ -16,10 +16,13 @@ use common_base::Plugins;
 use datanode::config::DatanodeOptions;
 use datanode::error::Result;
 
+use crate::options::PluginOptions;
+
 #[allow(unused_variables)]
 #[allow(unused_mut)]
 pub async fn setup_datanode_plugins(
     plugins: &mut Plugins,
+    plugin_options: &[PluginOptions],
     dn_opts: &DatanodeOptions,
 ) -> Result<()> {
     Ok(())

src/plugins/src/frontend.rs

@@ -18,9 +18,12 @@ use frontend::error::{IllegalAuthConfigSnafu, Result};
 use frontend::frontend::FrontendOptions;
 use snafu::ResultExt;
 
+use crate::options::PluginOptions;
+
 #[allow(unused_mut)]
 pub async fn setup_frontend_plugins(
     plugins: &mut Plugins,
+    _plugin_options: &[PluginOptions],
     fe_opts: &FrontendOptions,
 ) -> Result<()> {
     if let Some(user_provider) = fe_opts.user_provider.as_ref() {

src/plugins/src/lib.rs

@@ -15,7 +15,9 @@
 mod datanode;
 mod frontend;
 mod meta_srv;
+mod options;
 
 pub use datanode::{setup_datanode_plugins, start_datanode_plugins};
 pub use frontend::{setup_frontend_plugins, start_frontend_plugins};
 pub use meta_srv::{setup_metasrv_plugins, start_metasrv_plugins};
+pub use options::PluginOptions;

src/plugins/src/meta_srv.rs

@@ -16,9 +16,12 @@ use common_base::Plugins;
 use meta_srv::error::Result;
 use meta_srv::metasrv::MetasrvOptions;
 
+use crate::options::PluginOptions;
+
 #[allow(unused_variables)]
 pub async fn setup_metasrv_plugins(
     _plugins: &mut Plugins,
+    plugin_options: &[PluginOptions],
     metasrv_opts: &MetasrvOptions,
 ) -> Result<()> {
     Ok(())

src/plugins/src/options.rs

@@ -0,0 +1,23 @@
+// 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 serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub struct DummyOptions;
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub enum PluginOptions {
+    Dummy(DummyOptions),
+}