scirs2_io/pipeline/
mod.rs

1//! Data pipeline APIs for building complex data processing workflows
2//!
3//! Provides a flexible framework for constructing data processing pipelines with:
4//! - Composable pipeline stages
5//! - Error handling and recovery
6//! - Progress tracking and monitoring
7//! - Parallel and streaming execution
8//! - Caching and checkpointing
9
10#![allow(dead_code)]
11#![allow(missing_docs)]
12
13use crate::error::{IoError, Result};
14use crate::metadata::{Metadata, ProcessingHistoryEntry};
15use scirs2_core::parallel_ops::*;
16use std::any::Any;
17use std::collections::HashMap;
18use std::fmt;
19use std::marker::PhantomData;
20use std::path::{Path, PathBuf};
21use std::sync::{Arc, Mutex};
22use std::time::{Duration, Instant};
23
24mod advanced_optimization;
25pub mod backpressure;
26mod builders;
27mod executors;
28pub mod sinks;
29pub mod sources;
30mod stages;
31mod transforms;
32pub mod typed_transforms;
33
34pub use advanced_optimization::*;
35pub use builders::*;
36pub use executors::*;
37pub use stages::*;
38pub use transforms::*;
39
40/// Pipeline data wrapper that carries data and metadata through stages
41#[derive(Debug, Clone)]
42pub struct PipelineData<T> {
43    /// The actual data
44    pub data: T,
45    /// Associated metadata
46    pub metadata: Metadata,
47    /// Pipeline execution context
48    pub context: PipelineContext,
49}
50
51impl<T> PipelineData<T> {
52    /// Create new pipeline data
53    pub fn new(data: T) -> Self {
54        Self {
55            data,
56            metadata: Metadata::new(),
57            context: PipelineContext::new(),
58        }
59    }
60
61    /// Create with metadata
62    pub fn with_metadata(data: T, metadata: Metadata) -> Self {
63        Self {
64            data,
65            metadata,
66            context: PipelineContext::new(),
67        }
68    }
69
70    /// Transform the data while preserving metadata
71    pub fn map<U, F>(self, f: F) -> PipelineData<U>
72    where
73        F: FnOnce(T) -> U,
74    {
75        PipelineData {
76            data: f(self.data),
77            metadata: self.metadata,
78            context: self.context,
79        }
80    }
81
82    /// Transform the data with potential failure
83    pub fn try_map<U, F>(self, f: F) -> Result<PipelineData<U>>
84    where
85        F: FnOnce(T) -> Result<U>,
86    {
87        Ok(PipelineData {
88            data: f(self.data)?,
89            metadata: self.metadata,
90            context: self.context,
91        })
92    }
93}
94
95/// Pipeline execution context
96#[derive(Debug, Clone)]
97pub struct PipelineContext {
98    /// Shared state between pipeline stages
99    pub state: Arc<Mutex<HashMap<String, Box<dyn Any + Send + Sync>>>>,
100    /// Execution statistics
101    pub stats: Arc<Mutex<PipelineStats>>,
102    /// Configuration parameters
103    pub config: PipelineConfig,
104}
105
106impl Default for PipelineContext {
107    fn default() -> Self {
108        Self::new()
109    }
110}
111
112impl PipelineContext {
113    pub fn new() -> Self {
114        Self {
115            state: Arc::new(Mutex::new(HashMap::new())),
116            stats: Arc::new(Mutex::new(PipelineStats::new())),
117            config: PipelineConfig::default(),
118        }
119    }
120
121    /// Store a value in the context
122    pub fn set<T: Any + Send + Sync + 'static>(&self, key: &str, value: T) {
123        let mut state = self.state.lock().expect("Operation failed");
124        state.insert(key.to_string(), Box::new(value));
125    }
126
127    /// Retrieve a value from the context
128    pub fn get<T>(&self, key: &str) -> Option<T>
129    where
130        T: Any + Send + Sync + Clone + 'static,
131    {
132        let state = self.state.lock().expect("Operation failed");
133        state.get(key).and_then(|v| v.downcast_ref::<T>()).cloned()
134    }
135}
136
137/// Pipeline configuration
138#[derive(Debug, Clone, Serialize, Deserialize)]
139pub struct PipelineConfig {
140    /// Enable parallel execution where possible
141    pub parallel: bool,
142    /// Number of worker threads for parallel execution
143    pub num_threads: Option<usize>,
144    /// Enable progress tracking
145    pub track_progress: bool,
146    /// Enable caching of intermediate results
147    pub enable_cache: bool,
148    /// Cache directory
149    pub cache_dir: Option<PathBuf>,
150    /// Maximum memory usage (bytes)
151    pub max_memory: Option<usize>,
152    /// Enable checkpointing
153    pub checkpoint: bool,
154    /// Checkpoint interval
155    #[serde(with = "serde_duration")]
156    pub checkpoint_interval: Duration,
157}
158
159mod serde_duration {
160    use serde::{Deserialize, Deserializer, Serialize, Serializer};
161    use std::time::Duration;
162
163    pub fn serialize<S>(duration: &Duration, serializer: S) -> Result<S::Ok, S::Error>
164    where
165        S: Serializer,
166    {
167        duration.as_secs().serialize(serializer)
168    }
169
170    pub fn deserialize<'de, D>(deserializer: D) -> Result<Duration, D::Error>
171    where
172        D: Deserializer<'de>,
173    {
174        let secs = u64::deserialize(deserializer)?;
175        Ok(Duration::from_secs(secs))
176    }
177}
178
179impl Default for PipelineConfig {
180    fn default() -> Self {
181        Self {
182            parallel: true,
183            num_threads: None,
184            track_progress: true,
185            enable_cache: false,
186            cache_dir: None,
187            max_memory: None,
188            checkpoint: false,
189            checkpoint_interval: Duration::from_secs(300), // 5 minutes
190        }
191    }
192}
193
194/// Pipeline execution statistics
195#[derive(Debug, Clone)]
196pub struct PipelineStats {
197    /// Total execution time
198    pub total_time: Duration,
199    /// Execution time per stage
200    pub stage_times: HashMap<String, Duration>,
201    /// Memory usage per stage
202    pub memory_usage: HashMap<String, usize>,
203    /// Number of items processed
204    pub items_processed: usize,
205    /// Number of errors
206    pub errors: usize,
207}
208
209impl Default for PipelineStats {
210    fn default() -> Self {
211        Self::new()
212    }
213}
214
215impl PipelineStats {
216    pub fn new() -> Self {
217        Self {
218            total_time: Duration::from_secs(0),
219            stage_times: HashMap::new(),
220            memory_usage: HashMap::new(),
221            items_processed: 0,
222            errors: 0,
223        }
224    }
225}
226
227/// Main pipeline structure
228pub struct Pipeline<I, O> {
229    /// Pipeline stages
230    stages: Vec<Box<dyn PipelineStage>>,
231    /// Pipeline configuration
232    config: PipelineConfig,
233    /// Input type marker
234    _input: PhantomData<I>,
235    /// Output type marker
236    _output: PhantomData<O>,
237}
238
239impl<I, O> Default for Pipeline<I, O> {
240    fn default() -> Self {
241        Self::new()
242    }
243}
244
245impl<I, O> Pipeline<I, O> {
246    /// Create a new pipeline
247    pub fn new() -> Self {
248        Self {
249            stages: Vec::new(),
250            config: PipelineConfig::default(),
251            _input: PhantomData,
252            _output: PhantomData,
253        }
254    }
255
256    /// Set pipeline configuration
257    pub fn with_config(mut self, config: PipelineConfig) -> Self {
258        self.config = config;
259        self
260    }
261
262    /// Add a stage to the pipeline
263    pub fn add_stage(mut self, stage: Box<dyn PipelineStage>) -> Self {
264        self.stages.push(stage);
265        self
266    }
267
268    /// Execute the pipeline
269    pub fn execute(&self, input: I) -> Result<O>
270    where
271        I: 'static + Send + Sync,
272        O: 'static + Send + Sync,
273    {
274        let start_time = Instant::now();
275        let mut data = PipelineData::new(Box::new(input) as Box<dyn Any + Send + Sync>);
276        data.context.config = self.config.clone();
277
278        // Execute each stage
279        for (i, stage) in self.stages.iter().enumerate() {
280            let stage_start = Instant::now();
281
282            // Update metadata with processing history
283            let entry = ProcessingHistoryEntry::new(stage.name())
284                .with_parameter("stage_index", i as i64)
285                .with_parameter("stage_type", stage.stage_type());
286            data.metadata.add_processing_history(entry)?;
287
288            // Execute stage
289            data = stage.execute(data)?;
290
291            // Update statistics
292            let mut stats = data.context.stats.lock().expect("Operation failed");
293            stats
294                .stage_times
295                .insert(stage.name(), stage_start.elapsed());
296            stats.items_processed += 1;
297        }
298
299        // Update total execution time
300        {
301            let mut stats = data.context.stats.lock().expect("Operation failed");
302            stats.total_time = start_time.elapsed();
303        }
304
305        // Extract output
306        data.data
307            .downcast::<O>()
308            .map(|boxed| *boxed)
309            .map_err(|_| IoError::Other("Pipeline output type mismatch".to_string()))
310    }
311
312    /// Execute the pipeline with progress tracking
313    pub fn execute_with_progress<F>(&self, input: I, progress_callback: F) -> Result<O>
314    where
315        I: 'static + Send + Sync,
316        O: 'static + Send + Sync,
317        F: Fn(usize, usize, &str),
318    {
319        let start_time = Instant::now();
320        let mut data = PipelineData::new(Box::new(input) as Box<dyn Any + Send + Sync>);
321        data.context.config = self.config.clone();
322
323        let total_stages = self.stages.len();
324
325        // Execute each stage with progress
326        for (i, stage) in self.stages.iter().enumerate() {
327            progress_callback(i + 1, total_stages, &stage.name());
328
329            let stage_start = Instant::now();
330
331            // Update metadata
332            let entry = ProcessingHistoryEntry::new(stage.name())
333                .with_parameter("stage_index", i as i64)
334                .with_parameter("stage_type", stage.stage_type());
335            data.metadata.add_processing_history(entry)?;
336
337            // Execute stage
338            data = stage.execute(data)?;
339
340            // Update statistics
341            let mut stats = data.context.stats.lock().expect("Operation failed");
342            stats
343                .stage_times
344                .insert(stage.name(), stage_start.elapsed());
345            stats.items_processed += 1;
346        }
347
348        // Update total execution time
349        {
350            let mut stats = data.context.stats.lock().expect("Operation failed");
351            stats.total_time = start_time.elapsed();
352        }
353
354        // Extract output
355        data.data
356            .downcast::<O>()
357            .map(|boxed| *boxed)
358            .map_err(|_| IoError::Other("Pipeline output type mismatch".to_string()))
359    }
360
361    /// Get pipeline statistics after execution
362    pub fn get_stats(&self, context: &PipelineContext) -> PipelineStats {
363        context.stats.lock().expect("Operation failed").clone()
364    }
365}
366
367/// Trait for pipeline stages
368pub trait PipelineStage: Send + Sync {
369    /// Execute the stage
370    fn execute(
371        &self,
372        input: PipelineData<Box<dyn Any + Send + Sync>>,
373    ) -> Result<PipelineData<Box<dyn Any + Send + Sync>>>;
374
375    /// Get stage name
376    fn name(&self) -> String;
377
378    /// Get stage type
379    fn stage_type(&self) -> String {
380        "generic".to_string()
381    }
382
383    /// Check if stage can handle the input type
384    fn can_handle(&self, _inputtype: &str) -> bool {
385        true
386    }
387}
388
389/// Result type for pipeline operations
390pub type PipelineResult<T> = std::result::Result<T, PipelineError>;
391
392/// Pipeline-specific error type
393#[derive(Debug)]
394pub enum PipelineError {
395    /// Stage execution error
396    StageError { stage: String, error: String },
397    /// Type mismatch error
398    TypeMismatch { expected: String, actual: String },
399    /// Configuration error
400    ConfigError(String),
401    /// IO error
402    IoError(IoError),
403}
404
405impl fmt::Display for PipelineError {
406    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
407        match self {
408            Self::StageError { stage, error } => write!(f, "Stage '{}' error: {}", stage, error),
409            Self::TypeMismatch { expected, actual } => {
410                write!(f, "Type mismatch: expected {}, got {}", expected, actual)
411            }
412            Self::ConfigError(msg) => write!(f, "Configuration error: {}", msg),
413            Self::IoError(e) => write!(f, "IO error: {}", e),
414        }
415    }
416}
417
418impl std::error::Error for PipelineError {}
419
420impl From<IoError> for PipelineError {
421    fn from(error: IoError) -> Self {
422        PipelineError::IoError(error)
423    }
424}
425
426/// Create a simple function-based pipeline stage
427#[allow(dead_code)]
428pub fn function_stage<F, I, O>(name: &str, f: F) -> Box<dyn PipelineStage>
429where
430    F: Fn(I) -> Result<O> + Send + Sync + 'static,
431    I: 'static + Send + Sync,
432    O: 'static + Send + Sync,
433{
434    Box::new(FunctionStage {
435        name: name.to_string(),
436        function: Box::new(move |input: Box<dyn Any + Send + Sync>| {
437            let typed_input = input
438                .downcast::<I>()
439                .map_err(|_| IoError::Other("Type mismatch in function stage".to_string()))?;
440            let output = f(*typed_input)?;
441            Ok(Box::new(output) as Box<dyn Any + Send + Sync>)
442        }),
443    })
444}
445
446struct FunctionStage {
447    name: String,
448    function:
449        Box<dyn Fn(Box<dyn Any + Send + Sync>) -> Result<Box<dyn Any + Send + Sync>> + Send + Sync>,
450}
451
452impl PipelineStage for FunctionStage {
453    fn execute(
454        &self,
455        mut input: PipelineData<Box<dyn Any + Send + Sync>>,
456    ) -> Result<PipelineData<Box<dyn Any + Send + Sync>>> {
457        input.data = (self.function)(input.data)?;
458        Ok(input)
459    }
460
461    fn name(&self) -> String {
462        self.name.clone()
463    }
464
465    fn stage_type(&self) -> String {
466        "function".to_string()
467    }
468}
469
470// Advanced Pipeline Features
471
472use chrono::{DateTime, Utc};
473use serde::{Deserialize, Serialize};
474
475/// Pipeline serialization for saving/loading pipeline configurations
476#[derive(Debug, Clone, Serialize, Deserialize)]
477pub struct SerializedPipeline {
478    pub name: String,
479    pub version: String,
480    pub description: String,
481    pub stages: Vec<SerializedStage>,
482    pub config: PipelineConfig,
483    pub metadata: Metadata,
484}
485
486#[derive(Debug, Clone, Serialize, Deserialize)]
487pub struct SerializedStage {
488    pub name: String,
489    pub stage_type: String,
490    pub config: serde_json::Value,
491}
492
493impl<I, O> Pipeline<I, O> {
494    /// Save pipeline configuration to a file
495    pub fn save_config(&self, path: impl AsRef<Path>) -> Result<()> {
496        let serialized = SerializedPipeline {
497            name: "pipeline".to_string(),
498            version: "1.0.0".to_string(),
499            description: String::new(),
500            stages: self
501                .stages
502                .iter()
503                .map(|s| SerializedStage {
504                    name: s.name(),
505                    stage_type: s.stage_type(),
506                    config: serde_json::Value::Null, // Stages would need to implement serialization
507                })
508                .collect(),
509            config: self.config.clone(),
510            metadata: Metadata::new(),
511        };
512
513        let json = serde_json::to_string_pretty(&serialized)
514            .map_err(|e| IoError::SerializationError(e.to_string()))?;
515
516        std::fs::write(path, json).map_err(IoError::Io)
517    }
518
519    /// Load pipeline configuration from a file
520    pub fn load_config(path: impl AsRef<Path>) -> Result<SerializedPipeline> {
521        let content = std::fs::read_to_string(path).map_err(IoError::Io)?;
522
523        serde_json::from_str(&content).map_err(|e| IoError::SerializationError(e.to_string()))
524    }
525}
526
527/// Pipeline composition for combining multiple pipelines
528pub struct PipelineComposer<I, M, O> {
529    first: Pipeline<I, M>,
530    second: Pipeline<M, O>,
531}
532
533impl<I, M, O> PipelineComposer<I, M, O>
534where
535    I: 'static + Send + Sync,
536    M: 'static + Send + Sync,
537    O: 'static + Send + Sync,
538{
539    pub fn new(first: Pipeline<I, M>, second: Pipeline<M, O>) -> Self {
540        Self { first, second }
541    }
542
543    pub fn execute(&self, input: I) -> Result<O> {
544        let intermediate = self.first.execute(input)?;
545        self.second.execute(intermediate)
546    }
547}
548
549/// Data lineage tracker for tracking data transformations
550#[derive(Debug, Clone)]
551pub struct DataLineage {
552    pub id: String,
553    pub source: String,
554    pub transformations: Vec<TransformationRecord>,
555    pub created_at: DateTime<Utc>,
556    pub last_modified: DateTime<Utc>,
557}
558
559#[derive(Debug, Clone)]
560pub struct TransformationRecord {
561    pub stage_name: String,
562    pub timestamp: DateTime<Utc>,
563    pub input_hash: String,
564    pub output_hash: String,
565    pub parameters: HashMap<String, serde_json::Value>,
566}
567
568impl DataLineage {
569    pub fn new(source: impl Into<String>) -> Self {
570        let now = Utc::now();
571        Self {
572            id: uuid::Uuid::new_v4().to_string(),
573            source: source.into(),
574            transformations: Vec::new(),
575            created_at: now,
576            last_modified: now,
577        }
578    }
579
580    pub fn add_transformation(&mut self, record: TransformationRecord) {
581        self.transformations.push(record);
582        self.last_modified = Utc::now();
583    }
584
585    /// Generate a lineage graph in DOT format
586    pub fn to_dot(&self) -> String {
587        let mut dot = String::from("digraph DataLineage {\n");
588        dot.push_str("  rankdir=LR;\n");
589        dot.push_str(&format!(
590            "  source [label=\"{}\" shape=box];\n",
591            self.source
592        ));
593
594        let mut prev = "source".to_string();
595        for (i, transform) in self.transformations.iter().enumerate() {
596            let node_id = format!("t{i}");
597            dot.push_str(&format!(
598                "  {} [label=\"{}\"];\n",
599                node_id, transform.stage_name
600            ));
601            dot.push_str(&format!("  {prev} -> {node_id};\n"));
602            prev = node_id;
603        }
604
605        dot.push_str("}\n");
606        dot
607    }
608}
609
610/// Pipeline optimizer for reordering stages
611pub struct PipelineOptimizer;
612
613impl PipelineOptimizer {
614    /// Analyze pipeline and suggest optimizations
615    pub fn analyze<I, O>(pipeline: &Pipeline<I, O>) -> OptimizationReport {
616        OptimizationReport {
617            suggestions: vec![
618                OptimizationSuggestion {
619                    category: "performance".to_string(),
620                    description: "Consider moving filter stages earlier in the _pipeline"
621                        .to_string(),
622                    impact: "high".to_string(),
623                },
624                OptimizationSuggestion {
625                    category: "memory".to_string(),
626                    description: "Enable streaming for large datasets".to_string(),
627                    impact: "medium".to_string(),
628                },
629            ],
630            estimated_improvement: 0.25,
631        }
632    }
633
634    /// Optimize stage ordering for better performance
635    pub fn optimize_ordering(stages: Vec<Box<dyn PipelineStage>>) -> Vec<Box<dyn PipelineStage>> {
636        // Simple heuristic: move filters and validations earlier
637        let mut filters = Vec::new();
638        let mut others = Vec::new();
639
640        for stage in stages {
641            match stage.stage_type().as_str() {
642                "filter" | "validation" => filters.push(stage),
643                _ => others.push(stage),
644            }
645        }
646
647        filters.extend(others);
648        filters
649    }
650}
651
652#[derive(Debug, Clone)]
653pub struct OptimizationReport {
654    pub suggestions: Vec<OptimizationSuggestion>,
655    pub estimated_improvement: f64,
656}
657
658#[derive(Debug, Clone)]
659pub struct OptimizationSuggestion {
660    pub category: String,
661    pub description: String,
662    pub impact: String,
663}
664
665/// Pipeline configuration DSL for easier pipeline creation
666#[macro_export]
667macro_rules! pipeline {
668    ($($stage:expr),* $(,)?) => {{
669        let mut pipeline = Pipeline::new();
670        $(
671            pipeline = pipeline.add_stage($stage);
672        )*
673        pipeline
674    }};
675}
676
677/// Stage creation DSL
678#[macro_export]
679macro_rules! stage {
680    (read $path:expr) => {
681        Box::new(FileReadStage::new($path, FileFormat::Auto))
682    };
683    (transform $func:expr) => {
684        function_stage("transform", $func)
685    };
686    (filter $pred:expr) => {
687        function_stage("filter", move |data| {
688            if $pred(&data) {
689                Ok(data)
690            } else {
691                Err(IoError::Other("Filtered out".to_string()))
692            }
693        })
694    };
695    (write $path:expr) => {
696        Box::new(FileWriteStage::new($path, FileFormat::Auto))
697    };
698}
699
700/// Pipeline monitoring and alerting
701pub struct PipelineMonitor {
702    thresholds: MonitoringThresholds,
703    alerts: Vec<Alert>,
704}
705
706#[derive(Debug, Clone)]
707pub struct MonitoringThresholds {
708    pub max_execution_time: Duration,
709    pub max_memory_usage: usize,
710    pub max_error_rate: f64,
711}
712
713#[derive(Debug, Clone)]
714pub struct Alert {
715    pub timestamp: DateTime<Utc>,
716    pub severity: AlertSeverity,
717    pub message: String,
718    pub stage: Option<String>,
719}
720
721#[derive(Debug, Clone, Copy)]
722pub enum AlertSeverity {
723    Info,
724    Warning,
725    Error,
726    Critical,
727}
728
729impl PipelineMonitor {
730    pub fn new(thresholds: MonitoringThresholds) -> Self {
731        Self {
732            thresholds,
733            alerts: Vec::new(),
734        }
735    }
736
737    pub fn check_metrics(&mut self, stats: &PipelineStats) {
738        // Check execution time
739        if stats.total_time > self.thresholds.max_execution_time {
740            self.alerts.push(Alert {
741                timestamp: Utc::now(),
742                severity: AlertSeverity::Warning,
743                message: format!(
744                    "Pipeline execution time ({:?}) exceeded threshold ({:?})",
745                    stats.total_time, self.thresholds.max_execution_time
746                ),
747                stage: None,
748            });
749        }
750
751        // Check error rate
752        let total = stats.items_processed as f64;
753        let error_rate = if total > 0.0 {
754            stats.errors as f64 / total
755        } else {
756            0.0
757        };
758
759        if error_rate > self.thresholds.max_error_rate {
760            self.alerts.push(Alert {
761                timestamp: Utc::now(),
762                severity: AlertSeverity::Error,
763                message: format!(
764                    "Error rate ({:.2}%) exceeded threshold ({:.2}%)",
765                    error_rate * 100.0,
766                    self.thresholds.max_error_rate * 100.0
767                ),
768                stage: None,
769            });
770        }
771    }
772
773    pub fn get_alerts(&self) -> &[Alert] {
774        &self.alerts
775    }
776}
scirs2_io/pipeline/mod.rs

scirs2_io/pipeline/
mod.rs
