plusplusjiajia commented on code in PR #2651: URL: https://github.com/apache/iceberg-rust/pull/2651#discussion_r4456455887
########## crates/storage/opendal/src/prefixed.rs: ########## @@ -0,0 +1,379 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you 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. + +//! Storage that serves each location with its prefix's credential. + +use std::collections::HashMap; +use std::fmt::{self, Debug}; +use std::sync::Arc; + +use async_trait::async_trait; +use bytes::Bytes; +use futures::StreamExt; +use futures::stream::{self, BoxStream}; +use iceberg::Result; +use iceberg::io::{ + FileMetadata, FileRead, FileWrite, InputFile, OutputFile, Storage, StorageConfig, +}; +use serde::{Deserialize, Serialize}; + +/// Per-prefix batch size of `delete_stream`, as in Java's `S3FileIO.deleteFiles`. +const DELETE_BATCH_SIZE: usize = 1000; + +/// Serves each path with the credential of its longest matching prefix, as +/// Java's `S3FileIO.clientForStoragePath` does, else without credentials. +#[derive(Serialize, Deserialize)] +pub(crate) struct PrefixedStorage { + default: Arc<dyn Storage>, + /// Longest prefix first. + prefixed: Vec<(String, Arc<dyn Storage>)>, +} + +impl PrefixedStorage { + /// Builds the storage for `config` with `build`, which is passed configs + /// without storage credentials. + pub(crate) fn build( + config: &StorageConfig, + build: impl Fn(&StorageConfig) -> Result<Arc<dyn Storage>>, + ) -> Result<Arc<dyn Storage>> { + if config.storage_credentials().is_empty() { + return build(config); + } + Ok(Arc::new(Self::new(config, build)?)) + } + + fn new( + config: &StorageConfig, + build: impl Fn(&StorageConfig) -> Result<Arc<dyn Storage>>, + ) -> Result<Self> { + let base = StorageConfig::from_props(config.props().clone()); + // The last credential for a prefix wins, as in Java's `clientByPrefix`. + let credentials: HashMap<&str, &HashMap<String, String>> = config + .storage_credentials() + .iter() + .filter(|credential| !credential.prefix().is_empty()) Review Comment: Done, `StorageCredential::new` and its deserialization now reject an empty prefix. ########## crates/storage/opendal/src/prefixed.rs: ########## @@ -0,0 +1,379 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you 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. + +//! Storage that serves each location with its prefix's credential. + +use std::collections::HashMap; +use std::fmt::{self, Debug}; +use std::sync::Arc; + +use async_trait::async_trait; +use bytes::Bytes; +use futures::StreamExt; +use futures::stream::{self, BoxStream}; +use iceberg::Result; +use iceberg::io::{ + FileMetadata, FileRead, FileWrite, InputFile, OutputFile, Storage, StorageConfig, +}; +use serde::{Deserialize, Serialize}; + +/// Per-prefix batch size of `delete_stream`, as in Java's `S3FileIO.deleteFiles`. +const DELETE_BATCH_SIZE: usize = 1000; + +/// Serves each path with the credential of its longest matching prefix, as +/// Java's `S3FileIO.clientForStoragePath` does, else without credentials. +#[derive(Serialize, Deserialize)] +pub(crate) struct PrefixedStorage { + default: Arc<dyn Storage>, + /// Longest prefix first. + prefixed: Vec<(String, Arc<dyn Storage>)>, +} + +impl PrefixedStorage { + /// Builds the storage for `config` with `build`, which is passed configs + /// without storage credentials. + pub(crate) fn build( + config: &StorageConfig, + build: impl Fn(&StorageConfig) -> Result<Arc<dyn Storage>>, + ) -> Result<Arc<dyn Storage>> { + if config.storage_credentials().is_empty() { + return build(config); + } + Ok(Arc::new(Self::new(config, build)?)) + } + + fn new( + config: &StorageConfig, + build: impl Fn(&StorageConfig) -> Result<Arc<dyn Storage>>, + ) -> Result<Self> { + let base = StorageConfig::from_props(config.props().clone()); + // The last credential for a prefix wins, as in Java's `clientByPrefix`. + let credentials: HashMap<&str, &HashMap<String, String>> = config + .storage_credentials() + .iter() + .filter(|credential| !credential.prefix().is_empty()) + .map(|credential| (credential.prefix(), credential.config())) + .collect(); + let mut prefixed = credentials + .into_iter() + .map(|(prefix, credential)| { + let config = base.clone().with_props(credential.clone()); + Ok((prefix.to_string(), build(&config)?)) + }) + .collect::<Result<Vec<_>>>()?; + prefixed.sort_by_key(|(prefix, _)| std::cmp::Reverse(prefix.len())); + Ok(Self { + default: build(&base)?, + prefixed, + }) + } + + /// Matches raw strings, as Java does: `s3://b/data` covers `s3://b/database`. + fn prefix_index(&self, path: &str) -> Option<usize> { + self.prefixed + .iter() + .position(|(prefix, _)| path.starts_with(prefix.as_str())) + } + + fn storage_at(&self, index: Option<usize>) -> &dyn Storage { + match index { + Some(index) => self.prefixed[index].1.as_ref(), + None => self.default.as_ref(), + } + } + + fn storage_for(&self, path: &str) -> &dyn Storage { + self.storage_at(self.prefix_index(path)) + } +} + +// A backend's Debug may print the credentials it was built with. +impl Debug for PrefixedStorage { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + let prefixes = fmt::from_fn(|f| { + f.debug_list() + .entries(self.prefixed.iter().map(|(prefix, _)| prefix)) + .finish() + }); + f.debug_struct("PrefixedStorage") + .field("default", &self.default) + .field("prefixes", &prefixes) + .finish_non_exhaustive() Review Comment: The per-prefix storages' `Debug` would print their vended credentials, so they're left out. -- This is an automated message from the Apache Git Service. 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