Initial commit

crates/data/rtx-etl/src/lineage/impact.rs

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+//! Impact analysis for lineage.
+
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+use std::sync::Arc;
+use tokio::sync::RwLock;
+use uuid::Uuid;
+
+use super::config::ImpactAnalysisConfig;
+use super::graph::LineageGraph;
+use super::types::LineageNodeType;
+use crate::Result;
+
+/// Impact analyzer for lineage analysis
+#[derive(Debug)]
+pub struct ImpactAnalyzer {
+    /// Analysis configuration
+    config: ImpactAnalysisConfig,
+    /// Analysis cache
+    cache: Arc<RwLock<AnalysisCache>>,
+}
+
+impl ImpactAnalyzer {
+    #[must_use]
+    pub fn new(config: ImpactAnalysisConfig) -> Self {
+        Self {
+            config,
+            cache: Arc::new(RwLock::new(AnalysisCache::new())),
+        }
+    }
+
+    pub fn analyze_downstream_impact(
+        &self,
+        node_id: &str,
+        _graph: &LineageGraph,
+    ) -> Result<ImpactAnalysis> {
+        // Simplified implementation - would perform actual impact analysis
+        Ok(ImpactAnalysis {
+            analysis_id: Uuid::new_v4().to_string(),
+            target_node: node_id.to_string(),
+            analysis_time: Utc::now(),
+            affected_nodes: Vec::new(),
+            summary: ImpactSummary {
+                total_affected_nodes: 0,
+                nodes_by_impact_level: HashMap::new(),
+                max_distance: 0,
+                critical_issues: 0,
+                estimated_downtime_minutes: None,
+            },
+            risk_assessment: RiskAssessment {
+                overall_risk: RiskLevel::Low,
+                risk_factors: Vec::new(),
+                risk_score: 0.0,
+                recommended_actions: Vec::new(),
+            },
+        })
+    }
+
+    pub fn analyze_upstream_dependencies(
+        &self,
+        node_id: &str,
+        graph: &LineageGraph,
+    ) -> Result<ImpactAnalysis> {
+        self.analyze_downstream_impact(node_id, graph)
+    }
+}
+
+/// Cache for analysis results
+#[derive(Debug)]
+pub struct AnalysisCache {
+    /// Downstream impact cache
+    downstream_cache: HashMap<String, ImpactAnalysis>,
+    /// Upstream impact cache
+    upstream_cache: HashMap<String, ImpactAnalysis>,
+    /// Cache timestamps
+    cache_timestamps: HashMap<String, DateTime<Utc>>,
+    /// Cache TTL
+    cache_ttl: std::time::Duration,
+}
+
+impl AnalysisCache {
+    #[must_use]
+    pub fn new() -> Self {
+        Self {
+            downstream_cache: HashMap::new(),
+            upstream_cache: HashMap::new(),
+            cache_timestamps: HashMap::new(),
+            cache_ttl: std::time::Duration::from_secs(3600), // 1 hour
+        }
+    }
+}
+
+impl Default for AnalysisCache {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+/// Impact analysis result
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ImpactAnalysis {
+    /// Analysis identifier
+    pub analysis_id: String,
+    /// Target node
+    pub target_node: String,
+    /// Analysis timestamp
+    pub analysis_time: DateTime<Utc>,
+    /// Affected nodes
+    pub affected_nodes: Vec<AffectedNode>,
+    /// Impact summary
+    pub summary: ImpactSummary,
+    /// Risk assessment
+    pub risk_assessment: RiskAssessment,
+}
+
+/// Information about an affected node
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AffectedNode {
+    /// Node identifier
+    pub node_id: String,
+    /// Node type
+    pub node_type: LineageNodeType,
+    /// Impact level
+    pub impact_level: ImpactLevel,
+    /// Distance from target
+    pub distance: usize,
+    /// Impact details
+    pub impact_details: Vec<ImpactDetail>,
+}
+
+/// Levels of impact
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Hash)]
+pub enum ImpactLevel {
+    /// Critical impact
+    Critical,
+    /// High impact
+    High,
+    /// Medium impact
+    Medium,
+    /// Low impact
+    Low,
+    /// No impact
+    None,
+}
+
+/// Detailed impact information
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ImpactDetail {
+    /// Impact type
+    pub impact_type: ImpactType,
+    /// Impact description
+    pub description: String,
+    /// Estimated impact score (0.0 to 1.0)
+    pub impact_score: f64,
+    /// Mitigation suggestions
+    pub mitigation: Vec<String>,
+}
+
+/// Types of impact
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum ImpactType {
+    /// Data availability impact
+    DataAvailability,
+    /// Data quality impact
+    DataQuality,
+    /// Performance impact
+    Performance,
+    /// Schema compatibility impact
+    SchemaCompatibility,
+    /// Functional impact
+    Functional,
+    /// Business impact
+    Business,
+}
+
+/// Summary of impact analysis
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ImpactSummary {
+    /// Total affected nodes
+    pub total_affected_nodes: usize,
+    /// Nodes by impact level
+    pub nodes_by_impact_level: HashMap<ImpactLevel, usize>,
+    /// Maximum impact distance
+    pub max_distance: usize,
+    /// Critical issues count
+    pub critical_issues: usize,
+    /// Estimated downtime (in minutes)
+    pub estimated_downtime_minutes: Option<u32>,
+}
+
+/// Risk assessment for impact analysis
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct RiskAssessment {
+    /// Overall risk level
+    pub overall_risk: RiskLevel,
+    /// Risk factors
+    pub risk_factors: Vec<RiskFactor>,
+    /// Risk score (0.0 to 1.0)
+    pub risk_score: f64,
+    /// Recommended actions
+    pub recommended_actions: Vec<String>,
+}
+
+/// Risk levels
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum RiskLevel {
+    /// Critical risk
+    Critical,
+    /// High risk
+    High,
+    /// Medium risk
+    Medium,
+    /// Low risk
+    Low,
+    /// No risk
+    None,
+}
+
+/// Risk factor information
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct RiskFactor {
+    /// Factor type
+    pub factor_type: RiskFactorType,
+    /// Factor description
+    pub description: String,
+    /// Factor weight (0.0 to 1.0)
+    pub weight: f64,
+    /// Current value
+    pub current_value: f64,
+    /// Threshold value
+    pub threshold_value: f64,
+}
+
+/// Types of risk factors
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum RiskFactorType {
+    /// Data dependency risk
+    DataDependency,
+    /// Schema evolution risk
+    SchemaEvolution,
+    /// Performance degradation risk
+    PerformanceDegradation,
+    /// Business continuity risk
+    BusinessContinuity,
+    /// Compliance risk
+    Compliance,
+}