about summary refs log blame commit diff
path: root/tvix/castore/src/directoryservice/memory.rs
blob: 3b2795c3968c42bdde273a172d02d50919d5acf1 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
                                    
                               
                              

                        
                       

                                

                                                             
 
                         
                                   
                                                         
 
 
              
                                                  
                                                                         
                                                                                       
                                      
 
                              







                                                                                  
                                             

                                                                         
                                             
                        
                 
 




                                                                            
                                         


                        
                                           



             
                                                                                        
                                                                                 





                                                     
                          



                   
                                           
                                             


                  
 
                                                                              


                                         
                                                              
                                                               
     
 
                           
                                                                        


                    
                                                 
     
 
use crate::{proto, B3Digest, Error};
use futures::stream::BoxStream;
use std::collections::HashMap;
use std::sync::Arc;
use tokio::sync::RwLock;
use tonic::async_trait;
use tracing::{instrument, warn};

use super::utils::traverse_directory;
use super::{DirectoryPutter, DirectoryService, SimplePutter};

#[derive(Clone, Default)]
pub struct MemoryDirectoryService {
    db: Arc<RwLock<HashMap<B3Digest, proto::Directory>>>,
}

#[async_trait]
impl DirectoryService for MemoryDirectoryService {
    #[instrument(skip(self, digest), fields(directory.digest = %digest))]
    async fn get(&self, digest: &B3Digest) -> Result<Option<proto::Directory>, Error> {
        let db = self.db.read().await;

        match db.get(digest) {
            // The directory was not found, return
            None => Ok(None),

            // The directory was found, try to parse the data as Directory message
            Some(directory) => {
                // Validate the retrieved Directory indeed has the
                // digest we expect it to have, to detect corruptions.
                let actual_digest = directory.digest();
                if actual_digest != *digest {
                    return Err(Error::StorageError(format!(
                        "requested directory with digest {}, but got {}",
                        digest, actual_digest
                    )));
                }

                // Validate the Directory itself is valid.
                if let Err(e) = directory.validate() {
                    warn!("directory failed validation: {}", e.to_string());
                    return Err(Error::StorageError(format!(
                        "directory {} failed validation: {}",
                        actual_digest, e,
                    )));
                }

                Ok(Some(directory.clone()))
            }
        }
    }

    #[instrument(skip(self, directory), fields(directory.digest = %directory.digest()))]
    async fn put(&self, directory: proto::Directory) -> Result<B3Digest, Error> {
        let digest = directory.digest();

        // validate the directory itself.
        if let Err(e) = directory.validate() {
            return Err(Error::InvalidRequest(format!(
                "directory {} failed validation: {}",
                digest, e,
            )));
        }

        // store it
        let mut db = self.db.write().await;
        db.insert(digest.clone(), directory);

        Ok(digest)
    }

    #[instrument(skip_all, fields(directory.digest = %root_directory_digest))]
    fn get_recursive(
        &self,
        root_directory_digest: &B3Digest,
    ) -> BoxStream<'static, Result<proto::Directory, Error>> {
        traverse_directory(self.clone(), root_directory_digest)
    }

    #[instrument(skip_all)]
    fn put_multiple_start(&self) -> Box<(dyn DirectoryPutter + 'static)>
    where
        Self: Clone,
    {
        Box::new(SimplePutter::new(self.clone()))
    }
}