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use std::borrow::BorrowMut; use std::collections::HashMap; use std::fmt::Debug; use std::sync::Arc; use std::time::Duration; use anyhow::anyhow; use elasticsearch::http::headers::HeaderMap; use elasticsearch::http::request::JsonBody; use elasticsearch::http::transport::{SingleNodeConnectionPool, TransportBuilder}; use elasticsearch::http::Url; use elasticsearch::{BulkParts, Elasticsearch}; use rlink::channel::utils::handover::Handover; use rlink::core::checkpoint::CheckpointFunction; use rlink::core::element::{FnSchema, Record}; use rlink::core::function::{Context, NamedFunction, OutputFormat}; use rlink::utils::thread::{async_runtime, async_sleep, async_spawn}; use rlink::{core, utils}; use serde_json::Value; use thiserror::Error; pub struct ElasticsearchModel { pub index: String, pub es_type: &'static str, pub body: Value, } #[derive(Clone, Serialize, Deserialize, Debug)] pub struct Index { index: HashMap<String, String>, } impl Index { pub fn new() -> Self { Index { index: HashMap::new(), } } pub fn set_index(&mut self, index_value: String) { self.index.insert("_index".to_string(), index_value); } pub fn set_type(&mut self, type_value: String) { self.index.insert("_type".to_string(), type_value); } pub fn to_json(&self) -> Result<Value, serde_json::Error> { serde_json::to_value(self) } } pub trait ElasticsearchConverter: Debug + Send + Sync { fn to_json(&self, record: &mut Record) -> ElasticsearchModel; } #[derive(Debug, NamedFunction)] pub struct ElasticsearchOutputFormat { address: String, headers: HashMap<String, String>, builder: Arc<Box<dyn ElasticsearchConverter>>, handover: Option<Handover>, } impl ElasticsearchOutputFormat { pub fn new( address: &str, headers: HashMap<String, String>, builder: Box<dyn ElasticsearchConverter>, ) -> Self { ElasticsearchOutputFormat { address: address.to_string(), headers, builder: Arc::new(builder), handover: None, } } } impl OutputFormat for ElasticsearchOutputFormat { fn open(&mut self, context: &Context) -> core::Result<()> { self.handover = Some(Handover::new(self.name(), context.task_id.to_tags(), 10000)); let mut write_thead = ElasticsearchWriteThread::new( self.address.as_str(), self.headers.clone(), self.handover.as_ref().unwrap().clone(), 3000, ) .expect("build elasticsearch connection error"); let convert = self.builder.clone(); utils::thread::spawn("elastic-sink-block", move || { async_runtime("es_sink").block_on(async { write_thead.run(convert, 5).await; }); }); Ok(()) } fn write_record(&mut self, record: Record) { self.handover.as_ref().unwrap().produce(record).unwrap(); } fn close(&mut self) -> core::Result<()> { Ok(()) } fn schema(&self, _input_schema: FnSchema) -> FnSchema { FnSchema::Empty } } impl CheckpointFunction for ElasticsearchOutputFormat {} #[derive(Clone)] pub struct ElasticsearchWriteThread { client: Elasticsearch, batch_size: usize, handover: Handover, } impl ElasticsearchWriteThread { pub fn new( address: &str, headers: HashMap<String, String>, handover: Handover, batch_size: usize, ) -> Result<Self, Box<dyn std::error::Error>> { let mut header_map = HeaderMap::new(); if headers.contains_key("stoken") { let val = headers.get("stoken").unwrap(); header_map.insert("stoken", val.as_str().parse().unwrap()); } let url = Url::parse(address)?; let conn_pool = SingleNodeConnectionPool::new(url); let transport = TransportBuilder::new(conn_pool) .headers(header_map) .build()?; let client = Elasticsearch::new(transport); Ok(ElasticsearchWriteThread { client, batch_size, handover, }) } pub async fn run( &mut self, converters: Arc<Box<dyn ElasticsearchConverter>>, parallelism: usize, ) { let mut join_handlers = Vec::new(); for _ in 0..parallelism { let mut self_clone = self.clone(); let converter = converters.clone(); let handler = async_spawn(async move { self_clone.run0(converter).await; }); join_handlers.push(handler); } for handler in join_handlers { handler.await.unwrap(); } } pub async fn run0(&mut self, converter: Arc<Box<dyn ElasticsearchConverter>>) { loop { match self.batch_send(&converter).await { Ok(len) => { if len == 0 { async_sleep(Duration::from_secs(1)).await; } } Err(e) => { error!("write elasticsearch error. {}", e); async_sleep(Duration::from_millis(100)).await; } } } } async fn batch_send( &self, converter: &Box<dyn ElasticsearchConverter>, ) -> Result<usize, Box<dyn std::error::Error + Send>> { let mut bulk_bodies = Vec::with_capacity(self.batch_size); for _ in 0..self.batch_size { match self.handover.try_poll_next() { Ok(mut record) => { let ElasticsearchModel { index, es_type, body, } = converter.to_json(record.borrow_mut()); let mut index_model = Index::new(); index_model.set_index(index.clone()); index_model.set_type(es_type.to_string()); bulk_bodies.push(JsonBody::new(index_model.to_json().unwrap())); bulk_bodies.push(JsonBody::new(body)); } Err(_e) => { break; } } } let len = bulk_bodies.len(); self.flush(bulk_bodies).await.map_err(|e| { let err = std::io::Error::new(std::io::ErrorKind::Other, format!("{}", e)); let source: Box<dyn std::error::Error + Send> = Box::new(err); source })?; Ok(len) } async fn flush( &self, body_bulk: Vec<JsonBody<Value>>, ) -> Result<bool, Box<dyn std::error::Error>> { if body_bulk.len() == 0 { return Ok(true); } let response = self .client .bulk(BulkParts::None) .body(body_bulk) .send() .await?; let response_body = response.json::<Value>().await?; let errors = response_body["errors"] .as_bool() .ok_or(anyhow!("no errors field in es response"))?; if errors { let err = std::io::Error::new(std::io::ErrorKind::Other, ""); let source: Box<dyn std::error::Error + Send> = Box::new(err); Err(source) } else { Ok(true) } } } #[derive(Error, Debug)] #[error("boxed source")] pub struct BoxedSource { #[source] source: Box<dyn std::error::Error + Send + 'static>, }