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

scirs2_io/pipeline/
mod.rs
