File size: 6,089 Bytes
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use std::sync::Arc;
use std::time::Duration;
use anyhow::Context;
use anyhow::Result;
use anyhow::anyhow;
use rmcp::model::ListResourceTemplatesResult;
use rmcp::model::ListResourcesResult;
use rmcp::model::PaginatedRequestParams;
use rmcp::model::ReadResourceRequestParams;
use rmcp::model::ReadResourceResult;
use rmcp::model::Resource;
use rmcp::model::ResourceTemplate;
use tokio::task::JoinSet;
use tracing::warn;
use super::McpConnectionSet;
use crate::pagination::collect_paginated;
use crate::rmcp_client::ManagedClient;
impl McpConnectionSet {
/// Returns resources from servers selected by `include_server`.
pub async fn list_all_resources(
&self,
include_server: impl Fn(&str) -> bool,
) -> HashMap<String, Vec<Resource>> {
let mut join_set = JoinSet::new();
for (server_name, view) in self
.servers
.iter()
.filter(|(server_name, _)| include_server(server_name))
{
let server_name = server_name.clone();
let Ok(managed_client) = view.connection.client().await else {
continue;
};
let timeout = view.tool_timeout;
let client = managed_client.client;
join_set.spawn(async move {
let resources = collect_paginated("resources/list", timeout, |params| {
let client = Arc::clone(&client);
async move {
let response = client.list_resources(params, timeout).await?;
Ok((response.resources, response.next_cursor))
}
})
.await;
(server_name, resources)
});
}
let mut resources = HashMap::new();
while let Some(result) = join_set.join_next().await {
match result {
Ok((server_name, Ok(server_resources))) => {
resources.insert(server_name, server_resources);
}
Ok((server_name, Err(error))) => {
warn!("Failed to list resources for MCP server '{server_name}': {error:#}");
}
Err(error) => {
warn!("Task panic when listing resources for MCP server: {error:#}");
}
}
}
resources
}
/// Returns resource templates from servers selected by `include_server`.
pub async fn list_all_resource_templates(
&self,
include_server: impl Fn(&str) -> bool,
) -> HashMap<String, Vec<ResourceTemplate>> {
let mut join_set = JoinSet::new();
for (server_name, view) in self
.servers
.iter()
.filter(|(server_name, _)| include_server(server_name))
{
let server_name = server_name.clone();
let Ok(managed_client) = view.connection.client().await else {
continue;
};
let timeout = view.tool_timeout;
let client = managed_client.client;
join_set.spawn(async move {
let templates = collect_paginated("resources/templates/list", timeout, |params| {
let client = Arc::clone(&client);
async move {
let response = client.list_resource_templates(params, timeout).await?;
Ok((response.resource_templates, response.next_cursor))
}
})
.await;
(server_name, templates)
});
}
let mut templates = HashMap::new();
while let Some(result) = join_set.join_next().await {
match result {
Ok((server_name, Ok(server_templates))) => {
templates.insert(server_name, server_templates);
}
Ok((server_name, Err(error))) => {
warn!(
"Failed to list resource templates for MCP server '{server_name}': {error:#}"
);
}
Err(error) => {
warn!("Task panic when listing resource templates for MCP server: {error:#}");
}
}
}
templates
}
pub async fn list_resources(
&self,
server: &str,
params: Option<PaginatedRequestParams>,
) -> Result<ListResourcesResult> {
let (managed, timeout) = self.client_by_name(server).await?;
managed
.client
.list_resources(params, timeout)
.await
.with_context(|| format!("resources/list failed for `{server}`"))
}
pub async fn list_resource_templates(
&self,
server: &str,
params: Option<PaginatedRequestParams>,
) -> Result<ListResourceTemplatesResult> {
let (managed, timeout) = self.client_by_name(server).await?;
managed
.client
.list_resource_templates(params, timeout)
.await
.with_context(|| format!("resources/templates/list failed for `{server}`"))
}
pub async fn read_resource(
&self,
server: &str,
params: ReadResourceRequestParams,
) -> Result<ReadResourceResult> {
let (managed, timeout) = self.client_by_name(server).await?;
let uri = params.uri.clone();
managed
.client
.read_resource(params, timeout)
.await
.with_context(|| format!("resources/read failed for `{server}` ({uri})"))
}
pub(crate) async fn client_by_name(
&self,
name: &str,
) -> Result<(ManagedClient, Option<Duration>)> {
let view = self
.servers
.get(name)
.ok_or_else(|| anyhow!("unknown MCP server '{name}'"))?;
let client = view
.connection
.client()
.await
.context("failed to get client")?;
Ok((client, view.tool_timeout))
}
}
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