Luishfs commented on code in PR #4225: URL: https://github.com/apache/iggy/pull/4225#discussion_r4118808619
########## core/connectors/sources/mongodb_source/src/lib.rs: ########## @@ -0,0 +1,242 @@ +// 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. + +use async_trait::async_trait; +use core::mem::drop; +use futures::stream::TryStreamExt; +use iggy_common::{DateTime, Utc}; +use iggy_connector_sdk::{ + ConnectorState, Error, ProducedMessage, ProducedMessages, Schema, Source, source_connector, +}; +use mongodb::{Client, Collection, bson::Document, bson::doc, options::ClientOptions}; +use secrecy::{ExposeSecret, SecretString}; +use serde::{Deserialize, Serialize}; +use std::str::FromStr; +use std::time::Duration; +use tokio::sync::Mutex; +use tracing::info; + +source_connector!(MongodbSource); + +#[derive(Debug, Clone, Serialize, Deserialize)] +struct State { + last_poll_timestamp: Option<DateTime<Utc>>, + total_documents_fetched: usize, + poll_count: usize, +} + +#[derive(Debug, Clone, Serialize, Deserialize)] +pub struct MongodbSourceConfig { + #[serde(serialize_with = "iggy_common::serde_secret::serialize_secret")] + pub connection_uri: SecretString, + pub database: String, + pub collection: String, + pub max_pool_size: Option<u32>, + pub query: Option<Document>, + pub timestamp_field: Option<String>, + pub limit: Option<i64>, + pub polling_interval: Option<String>, +} + +#[derive(Debug)] +pub struct MongodbSource { + id: u32, + config: MongodbSourceConfig, + client: Option<Client>, + polling_interval: Duration, + state: Mutex<State>, +} + +const CONNECTOR_NAME: &str = "MongoDB source"; + +impl MongodbSource { + pub fn new(id: u32, config: MongodbSourceConfig, state: Option<ConnectorState>) -> Self { + let polling_interval = config + .polling_interval + .as_deref() + .unwrap_or("10s") + .parse::<humantime::Duration>() + .unwrap_or_else(|_| humantime::Duration::from_str("10s").unwrap()) + .into(); + + let restored_state = state + .and_then(|s| s.deserialize::<State>(CONNECTOR_NAME, id)) + .inspect(|s| { + info!( + "Restored state for {CONNECTOR_NAME} connector with ID: {id}. \ + Documents fetched: {}, poll count: {}", + s.total_documents_fetched, s.poll_count + ); + }); + + MongodbSource { + id, + config, + client: None, + polling_interval, + state: Mutex::new(restored_state.unwrap_or(State { + last_poll_timestamp: None, + total_documents_fetched: 0, + poll_count: 0, + })), + } + } + + fn serialize_state(&self, state: &State) -> Option<ConnectorState> { + ConnectorState::serialize(state, CONNECTOR_NAME, self.id) + } + + async fn create_client(&self) -> Result<Client, Error> { + let mut client_options: ClientOptions = + ClientOptions::parse(self.config.connection_uri.expose_secret()) + .await + .map_err(|e| Error::InitError(format!("Failed to parse connection URI: {e}")))?; + if let Some(pool_size) = self.config.max_pool_size { + client_options.max_pool_size = Some(pool_size); + } + let client = Client::with_options(client_options) + .map_err(|e| Error::InitError(format!("Failed to create client: {e}")))?; + Ok(client) + } + + async fn search_documents(&self, client: &Client) -> Result<Vec<ProducedMessage>, Error> { + let state = self.state.lock().await; + let limit = &self.config.limit.unwrap_or(100); + + let coll: Collection<Document> = client + .database(&self.config.database.to_string()) + .collection(&self.config.collection.to_string()); + + let mut cursor = if let Some(timestamp_field) = &self.config.timestamp_field + && let Some(last_timestamp) = state.last_poll_timestamp + { + let mut filter = self.config.query.clone().unwrap_or_default(); + filter.insert( + timestamp_field.clone(), + doc! { "$gt": mongodb::bson::DateTime::from_millis(last_timestamp.timestamp_millis()) }, + ); + + coll.find(filter.clone()) + .limit(*limit) + .sort(doc! { timestamp_field: 1 }) + .await + .map_err(|e| Error::InitError(format!("Failed to execute search: {e}")))? + } else { + let filter = &self.config.query.clone().unwrap_or_else(|| doc! {}); + coll.find(filter.clone()) + .await + .map_err(|e| Error::InitError(format!("Failed to execute search: {e}")))? + }; + + drop(state); + + let mut messages = Vec::new(); + let mut latest_timestamp = None; + + while let Some(doc) = cursor + .try_next() + .await + .map_err(|e| Error::InitError(format!("Failed to move cursor {e}")))? + { + if let Some(timestamp_field) = &self.config.timestamp_field Review Comment: adressed in [ceeb9b0](https://github.com/apache/iggy/pull/4225/commits/ceeb9b041738d80b3ff348e4a8f73f34b34c853d) -- This is an automated message from the Apache Git Service. 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