oxirs_vec/
federated_search.rs

1//! Federated Vector Search - Advanced Multi-Organization Search
2//!
3//! This module implements advanced federated vector search capabilities that extend
4//! beyond basic distributed search to enable cross-organizational, semantic, and
5//! trust-based federation. It supports federating across different vector schemas,
6//! organizations, and trust domains while maintaining security and privacy.
7
8use crate::{
9    distributed_vector_search::{DistributedVectorSearch, NodeHealthStatus},
10    quantum_search::QuantumVectorSearch,
11    similarity::{SimilarityMetric, SimilarityResult},
12    Vector,
13};
14
15use anyhow::{anyhow, Context, Result};
16use serde::{Deserialize, Serialize};
17use std::collections::HashMap;
18use std::sync::{Arc, RwLock};
19use std::time::{Duration, Instant, SystemTime};
20use tracing::{debug, info, span, Level};
21
22/// Federated search configuration
23#[derive(Debug, Clone, Serialize, Deserialize)]
24pub struct FederatedSearchConfig {
25    /// Maximum number of federations to query simultaneously
26    pub max_concurrent_federations: usize,
27    /// Default timeout for federated queries
28    pub default_timeout: Duration,
29    /// Enable semantic query routing
30    pub enable_semantic_routing: bool,
31    /// Enable cross-organization trust verification
32    pub enable_trust_verification: bool,
33    /// Enable result aggregation across federations
34    pub enable_result_aggregation: bool,
35    /// Privacy preservation mode
36    pub privacy_mode: PrivacyMode,
37    /// Schema compatibility checking
38    pub schema_compatibility: SchemaCompatibility,
39}
40
41impl Default for FederatedSearchConfig {
42    fn default() -> Self {
43        Self {
44            max_concurrent_federations: 10,
45            default_timeout: Duration::from_secs(30),
46            enable_semantic_routing: true,
47            enable_trust_verification: true,
48            enable_result_aggregation: true,
49            privacy_mode: PrivacyMode::Balanced,
50            schema_compatibility: SchemaCompatibility::Strict,
51        }
52    }
53}
54
55/// Privacy preservation modes for federated search
56#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, PartialOrd)]
57pub enum PrivacyMode {
58    /// No privacy preservation
59    None,
60    /// Basic anonymization
61    Basic,
62    /// Balanced privacy and functionality
63    Balanced,
64    /// Maximum privacy with differential privacy
65    Strict,
66}
67
68/// Schema compatibility levels
69#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, PartialOrd)]
70pub enum SchemaCompatibility {
71    /// Best-effort compatibility with loss tolerance
72    BestEffort,
73    /// Compatible schemas allowed with transformation
74    Compatible,
75    /// Strict schema matching required
76    Strict,
77}
78
79/// Federation endpoint configuration
80#[derive(Debug, Clone, Serialize, Deserialize)]
81pub struct FederationEndpoint {
82    /// Unique federation identifier
83    pub federation_id: String,
84    /// Federation name
85    pub name: String,
86    /// Base URL for federation API
87    pub base_url: String,
88    /// Organization identifier
89    pub organization_id: String,
90    /// Trust level (0.0 to 1.0)
91    pub trust_level: f32,
92    /// API version supported
93    pub api_version: String,
94    /// Authentication credentials
95    pub auth_config: AuthenticationConfig,
96    /// Supported vector dimensions
97    pub supported_dimensions: Vec<usize>,
98    /// Supported similarity metrics
99    pub supported_metrics: Vec<SimilarityMetric>,
100    /// Privacy capabilities
101    pub privacy_capabilities: PrivacyCapabilities,
102    /// Schema information
103    pub schema_info: SchemaInfo,
104    /// Performance characteristics
105    pub performance_profile: PerformanceProfile,
106}
107
108/// Authentication configuration for federation
109#[derive(Debug, Clone, Serialize, Deserialize)]
110pub struct AuthenticationConfig {
111    /// Authentication type
112    pub auth_type: AuthenticationType,
113    /// API key (if applicable)
114    pub api_key: Option<String>,
115    /// OAuth configuration (if applicable)
116    pub oauth_config: Option<OAuthConfig>,
117    /// Certificate-based auth (if applicable)
118    pub cert_config: Option<CertificateConfig>,
119}
120
121/// Authentication types supported
122#[derive(Debug, Clone, Serialize, Deserialize)]
123pub enum AuthenticationType {
124    ApiKey,
125    OAuth2,
126    Certificate,
127    Bearer,
128    Custom(String),
129}
130
131/// OAuth configuration
132#[derive(Debug, Clone, Serialize, Deserialize)]
133pub struct OAuthConfig {
134    pub client_id: String,
135    pub client_secret: String,
136    pub token_url: String,
137    pub scope: String,
138}
139
140/// Certificate-based authentication
141#[derive(Debug, Clone, Serialize, Deserialize)]
142pub struct CertificateConfig {
143    pub cert_path: String,
144    pub key_path: String,
145    pub ca_path: Option<String>,
146}
147
148/// Privacy capabilities of a federation endpoint
149#[derive(Debug, Clone, Serialize, Deserialize)]
150pub struct PrivacyCapabilities {
151    /// Supports differential privacy
152    pub differential_privacy: bool,
153    /// Supports k-anonymity
154    pub k_anonymity: bool,
155    /// Supports secure multiparty computation
156    pub secure_mpc: bool,
157    /// Supports homomorphic encryption
158    pub homomorphic_encryption: bool,
159    /// Privacy budget available
160    pub privacy_budget: Option<f32>,
161}
162
163/// Schema information for federation compatibility
164#[derive(Debug, Clone, Serialize, Deserialize)]
165pub struct SchemaInfo {
166    /// Vector schema version
167    pub schema_version: String,
168    /// Metadata schema
169    pub metadata_schema: HashMap<String, String>,
170    /// Supported data types
171    pub supported_types: Vec<String>,
172    /// Dimension constraints
173    pub dimension_constraints: DimensionConstraints,
174}
175
176/// Vector dimension constraints
177#[derive(Debug, Clone, Serialize, Deserialize)]
178pub struct DimensionConstraints {
179    pub min_dimensions: usize,
180    pub max_dimensions: usize,
181    pub preferred_dimensions: Vec<usize>,
182}
183
184/// Performance profile of federation endpoint
185#[derive(Debug, Clone, Serialize, Deserialize)]
186pub struct PerformanceProfile {
187    /// Average latency in milliseconds
188    pub avg_latency_ms: u64,
189    /// Maximum concurrent queries supported
190    pub max_concurrent_queries: usize,
191    /// Rate limit (queries per second)
192    pub rate_limit_qps: f32,
193    /// Data freshness guarantee
194    pub data_freshness_seconds: u64,
195}
196
197/// Federated query specification
198#[derive(Debug, Clone, Serialize, Deserialize)]
199pub struct FederatedQuery {
200    /// Unique query identifier
201    pub query_id: String,
202    /// Query vector
203    pub vector: Vector,
204    /// Number of results requested
205    pub k: usize,
206    /// Similarity metric
207    pub metric: SimilarityMetric,
208    /// Query filters
209    pub filters: HashMap<String, String>,
210    /// Target federations (empty = all)
211    pub target_federations: Vec<String>,
212    /// Privacy requirements
213    pub privacy_requirements: PrivacyRequirements,
214    /// Quality requirements
215    pub quality_requirements: QualityRequirements,
216    /// Timeout
217    pub timeout: Duration,
218}
219
220/// Privacy requirements for federated query
221#[derive(Debug, Clone, Serialize, Deserialize)]
222pub struct PrivacyRequirements {
223    /// Minimum privacy level required
224    pub min_privacy_level: PrivacyMode,
225    /// Allow result aggregation
226    pub allow_aggregation: bool,
227    /// Maximum data exposure tolerance
228    pub max_exposure_tolerance: f32,
229}
230
231/// Quality requirements for federated query
232#[derive(Debug, Clone, Serialize, Deserialize)]
233pub struct QualityRequirements {
234    /// Minimum result quality threshold
235    pub min_quality_threshold: f32,
236    /// Maximum latency tolerance
237    pub max_latency_ms: u64,
238    /// Minimum number of results required
239    pub min_results: usize,
240    /// Result freshness requirements
241    pub max_staleness_seconds: u64,
242}
243
244/// Federated search result
245#[derive(Debug, Clone, Serialize, Deserialize)]
246pub struct FederatedSearchResult {
247    /// Query ID that generated this result
248    pub query_id: String,
249    /// Federation that provided this result
250    pub federation_id: String,
251    /// Original result from federation
252    pub result: SimilarityResult,
253    /// Confidence in result quality (0.0 to 1.0)
254    pub confidence: f32,
255    /// Privacy level of this result
256    pub privacy_level: PrivacyMode,
257    /// Trust score for the source (0.0 to 1.0)
258    pub trust_score: f32,
259    /// Result metadata
260    pub metadata: ResultMetadata,
261}
262
263/// Metadata for federated search results
264#[derive(Debug, Clone, Serialize, Deserialize)]
265pub struct ResultMetadata {
266    /// Timestamp when result was generated
267    pub timestamp: SystemTime,
268    /// Processing time in milliseconds
269    pub processing_time_ms: u64,
270    /// Schema version used
271    pub schema_version: String,
272    /// Data provenance information
273    pub provenance: DataProvenance,
274}
275
276/// Data provenance tracking
277#[derive(Debug, Clone, Serialize, Deserialize)]
278pub struct DataProvenance {
279    /// Original data source
280    pub source: String,
281    /// Data transformation pipeline
282    pub transformations: Vec<String>,
283    /// Quality assurance steps
284    pub quality_checks: Vec<String>,
285    /// Data lineage hash
286    pub lineage_hash: String,
287}
288
289/// Aggregated federated search response
290#[derive(Debug, Clone, Serialize, Deserialize)]
291pub struct FederatedSearchResponse {
292    /// Query ID
293    pub query_id: String,
294    /// Aggregated results
295    pub results: Vec<FederatedSearchResult>,
296    /// Federation statistics
297    pub federation_stats: FederationStatistics,
298    /// Aggregation metadata
299    pub aggregation_metadata: AggregationMetadata,
300}
301
302/// Statistics for federated search execution
303#[derive(Debug, Clone, Serialize, Deserialize)]
304pub struct FederationStatistics {
305    /// Total federations contacted
306    pub federations_contacted: usize,
307    /// Federations that responded
308    pub federations_responded: usize,
309    /// Total results before aggregation
310    pub total_raw_results: usize,
311    /// Results after aggregation
312    pub aggregated_results: usize,
313    /// Average response time
314    pub avg_response_time_ms: u64,
315    /// Trust-weighted quality score
316    pub trust_weighted_quality: f32,
317}
318
319/// Metadata about result aggregation
320#[derive(Debug, Clone, Serialize, Deserialize)]
321pub struct AggregationMetadata {
322    /// Aggregation strategy used
323    pub strategy: AggregationStrategy,
324    /// Duplicate removal statistics
325    pub duplicate_removal_stats: DuplicateRemovalStats,
326    /// Privacy preservation applied
327    pub privacy_preservation: Vec<String>,
328    /// Quality enhancement applied
329    pub quality_enhancements: Vec<String>,
330}
331
332/// Aggregation strategies for federated results
333#[derive(Debug, Clone, Serialize, Deserialize)]
334pub enum AggregationStrategy {
335    /// Simple union of all results
336    Union,
337    /// Intersection of common results
338    Intersection,
339    /// Trust-weighted ranking
340    TrustWeighted,
341    /// Quality-based filtering
342    QualityFiltered,
343    /// Semantic clustering
344    SemanticClustered,
345    /// Quantum-enhanced aggregation
346    QuantumEnhanced,
347}
348
349/// Statistics for duplicate removal
350#[derive(Debug, Clone, Serialize, Deserialize)]
351pub struct DuplicateRemovalStats {
352    /// Original result count
353    pub original_count: usize,
354    /// Duplicates found
355    pub duplicates_found: usize,
356    /// Final result count
357    pub final_count: usize,
358    /// Similarity threshold used
359    pub similarity_threshold: f32,
360}
361
362/// Main federated vector search coordinator
363pub struct FederatedVectorSearch {
364    /// Configuration
365    config: FederatedSearchConfig,
366    /// Registered federation endpoints
367    federations: Arc<RwLock<HashMap<String, FederationEndpoint>>>,
368    /// Distributed search coordinator
369    distributed_search: Arc<DistributedVectorSearch>,
370    /// Quantum search engine for enhanced aggregation
371    quantum_search: Arc<QuantumVectorSearch>,
372    /// Schema compatibility engine
373    schema_engine: Arc<RwLock<SchemaCompatibilityEngine>>,
374    /// Trust management system
375    trust_manager: Arc<RwLock<TrustManager>>,
376    /// Privacy preservation engine
377    privacy_engine: Arc<RwLock<PrivacyEngine>>,
378    /// Query cache for performance
379    query_cache: Arc<RwLock<HashMap<String, FederatedSearchResponse>>>,
380    /// Performance metrics
381    metrics: Arc<RwLock<FederationMetrics>>,
382}
383
384/// Schema compatibility checking engine
385#[derive(Debug)]
386pub struct SchemaCompatibilityEngine {
387    /// Known schema mappings
388    schema_mappings: HashMap<String, SchemaMapping>,
389    /// Transformation rules
390    transformation_rules: Vec<TransformationRule>,
391}
392
393/// Schema mapping between different formats
394#[derive(Debug, Clone)]
395pub struct SchemaMapping {
396    /// Source schema identifier
397    pub source_schema: String,
398    /// Target schema identifier
399    pub target_schema: String,
400    /// Field mappings
401    pub field_mappings: HashMap<String, String>,
402    /// Dimension transformation
403    pub dimension_transform: Option<DimensionTransform>,
404}
405
406/// Dimension transformation specification
407#[derive(Debug, Clone)]
408pub struct DimensionTransform {
409    /// Source dimensions
410    pub source_dimensions: usize,
411    /// Target dimensions
412    pub target_dimensions: usize,
413    /// Transformation method
414    pub method: TransformMethod,
415}
416
417/// Transformation methods for dimension compatibility
418#[derive(Debug, Clone)]
419pub enum TransformMethod {
420    /// Padding with zeros
421    Padding,
422    /// Truncation
423    Truncation,
424    /// PCA reduction
425    PcaReduction,
426    /// Linear transformation
427    LinearTransform(Vec<Vec<f32>>),
428}
429
430/// Schema transformation rule
431#[derive(Debug, Clone)]
432pub struct TransformationRule {
433    /// Rule identifier
434    pub rule_id: String,
435    /// Condition for applying rule
436    pub condition: String,
437    /// Transformation to apply
438    pub transformation: String,
439    /// Quality impact estimate
440    pub quality_impact: f32,
441}
442
443/// Trust management system
444#[derive(Debug)]
445pub struct TrustManager {
446    /// Trust scores for federations
447    trust_scores: HashMap<String, f32>,
448    /// Trust history
449    trust_history: HashMap<String, Vec<TrustEvent>>,
450    /// Trust verification rules
451    verification_rules: Vec<TrustRule>,
452}
453
454/// Trust event for tracking federation reliability
455#[derive(Debug, Clone)]
456pub struct TrustEvent {
457    /// Timestamp of event
458    pub timestamp: SystemTime,
459    /// Event type
460    pub event_type: TrustEventType,
461    /// Impact on trust score
462    pub trust_impact: f32,
463    /// Additional context
464    pub context: String,
465}
466
467/// Types of trust events
468#[derive(Debug, Clone)]
469pub enum TrustEventType {
470    /// Successful query response
471    SuccessfulResponse,
472    /// Failed query response
473    FailedResponse,
474    /// Quality degradation detected
475    QualityDegradation,
476    /// Privacy violation detected
477    PrivacyViolation,
478    /// Performance degradation
479    PerformanceDegradation,
480    /// Security incident
481    SecurityIncident,
482}
483
484/// Trust verification rule
485#[derive(Debug, Clone)]
486pub struct TrustRule {
487    /// Rule identifier
488    pub rule_id: String,
489    /// Rule description
490    pub description: String,
491    /// Verification function
492    pub verification_fn: String,
493    /// Trust impact if rule passes
494    pub positive_impact: f32,
495    /// Trust impact if rule fails
496    pub negative_impact: f32,
497}
498
499/// Privacy preservation engine
500#[derive(Debug)]
501pub struct PrivacyEngine {
502    /// Privacy policies
503    privacy_policies: HashMap<String, PrivacyPolicy>,
504    /// Active privacy mechanisms
505    mechanisms: Vec<PrivacyMechanism>,
506    /// Privacy budget tracker
507    budget_tracker: PrivacyBudgetTracker,
508}
509
510/// Privacy policy for federation
511#[derive(Debug, Clone)]
512pub struct PrivacyPolicy {
513    /// Policy identifier
514    pub policy_id: String,
515    /// Applicable federation IDs
516    pub applicable_federations: Vec<String>,
517    /// Privacy requirements
518    pub requirements: PrivacyRequirements,
519    /// Enforcement mechanisms
520    pub enforcement_mechanisms: Vec<String>,
521}
522
523/// Privacy preservation mechanism
524#[derive(Debug, Clone)]
525pub struct PrivacyMechanism {
526    /// Mechanism identifier
527    pub mechanism_id: String,
528    /// Mechanism type
529    pub mechanism_type: PrivacyMechanismType,
530    /// Privacy parameters
531    pub parameters: HashMap<String, f32>,
532    /// Quality impact
533    pub quality_impact: f32,
534}
535
536/// Types of privacy mechanisms
537#[derive(Debug, Clone)]
538pub enum PrivacyMechanismType {
539    /// Differential privacy with noise addition
540    DifferentialPrivacy,
541    /// K-anonymity grouping
542    KAnonymity,
543    /// L-diversity
544    LDiversity,
545    /// T-closeness
546    TCloseness,
547    /// Secure multiparty computation
548    SecureMpc,
549    /// Homomorphic encryption
550    HomomorphicEncryption,
551}
552
553/// Privacy budget tracker for differential privacy
554#[derive(Debug)]
555pub struct PrivacyBudgetTracker {
556    /// Budget allocations per federation
557    budget_allocations: HashMap<String, f32>,
558    /// Budget usage tracking
559    budget_usage: HashMap<String, f32>,
560    /// Budget renewal policies
561    renewal_policies: HashMap<String, BudgetRenewalPolicy>,
562}
563
564/// Budget renewal policy
565#[derive(Debug, Clone)]
566pub struct BudgetRenewalPolicy {
567    /// Renewal interval
568    pub renewal_interval: Duration,
569    /// Budget amount per renewal
570    pub budget_per_renewal: f32,
571    /// Maximum accumulated budget
572    pub max_accumulated_budget: f32,
573}
574
575/// Performance metrics for federation
576#[derive(Debug, Default, Clone)]
577pub struct FederationMetrics {
578    /// Total queries processed
579    pub total_queries: u64,
580    /// Successful queries
581    pub successful_queries: u64,
582    /// Failed queries
583    pub failed_queries: u64,
584    /// Average response time
585    pub avg_response_time_ms: f64,
586    /// Privacy preservation overhead
587    pub privacy_overhead_ms: f64,
588    /// Schema transformation overhead
589    pub schema_overhead_ms: f64,
590    /// Trust verification overhead
591    pub trust_overhead_ms: f64,
592}
593
594impl FederatedVectorSearch {
595    /// Create a new federated vector search coordinator
596    pub async fn new(config: FederatedSearchConfig) -> Result<Self> {
597        let distributed_search = Arc::new(
598            DistributedVectorSearch::new(
599                crate::distributed_vector_search::PartitioningStrategy::Hash,
600            )
601            .context("Failed to create distributed search coordinator")?,
602        );
603
604        let quantum_search = Arc::new(QuantumVectorSearch::with_default_config());
605
606        Ok(Self {
607            config,
608            federations: Arc::new(RwLock::new(HashMap::new())),
609            distributed_search,
610            quantum_search,
611            schema_engine: Arc::new(RwLock::new(SchemaCompatibilityEngine::new())),
612            trust_manager: Arc::new(RwLock::new(TrustManager::new())),
613            privacy_engine: Arc::new(RwLock::new(PrivacyEngine::new())),
614            query_cache: Arc::new(RwLock::new(HashMap::new())),
615            metrics: Arc::new(RwLock::new(FederationMetrics::default())),
616        })
617    }
618
619    /// Register a new federation endpoint
620    pub async fn register_federation(&self, endpoint: FederationEndpoint) -> Result<()> {
621        let span =
622            span!(Level::DEBUG, "register_federation", federation_id = %endpoint.federation_id);
623        let _enter = span.enter();
624
625        // Validate endpoint configuration
626        self.validate_federation_endpoint(&endpoint)?;
627
628        // Perform trust verification if enabled
629        if self.config.enable_trust_verification {
630            self.verify_federation_trust(&endpoint).await?;
631        }
632
633        // Check schema compatibility
634        if self.config.schema_compatibility != SchemaCompatibility::BestEffort {
635            self.verify_schema_compatibility(&endpoint).await?;
636        }
637
638        // Register the federation
639        {
640            let mut federations = self.federations.write().unwrap();
641            federations.insert(endpoint.federation_id.clone(), endpoint.clone());
642        }
643
644        // Initialize trust tracking
645        {
646            let mut trust_manager = self.trust_manager.write().unwrap();
647            trust_manager
648                .initialize_federation_trust(&endpoint.federation_id, endpoint.trust_level);
649        }
650
651        info!(
652            "Successfully registered federation: {}",
653            endpoint.federation_id
654        );
655        Ok(())
656    }
657
658    /// Perform federated vector search
659    pub async fn federated_search(&self, query: FederatedQuery) -> Result<FederatedSearchResponse> {
660        let span = span!(Level::INFO, "federated_search", query_id = %query.query_id);
661        let _enter = span.enter();
662
663        let start_time = Instant::now();
664
665        // Check cache first
666        if let Some(cached_response) = self.get_cached_response(&query.query_id) {
667            debug!("Returning cached response for query {}", query.query_id);
668            return Ok(cached_response);
669        }
670
671        // Select target federations
672        let target_federations = self.select_target_federations(&query).await?;
673
674        // Execute parallel federated queries
675        let federation_results = self
676            .execute_parallel_federated_queries(&query, &target_federations)
677            .await?;
678
679        // Apply privacy preservation
680        let privacy_preserved_results = if self.config.enable_result_aggregation {
681            self.apply_privacy_preservation(&federation_results, &query.privacy_requirements)
682                .await?
683        } else {
684            federation_results
685        };
686
687        // Aggregate results
688        let aggregated_response = self
689            .aggregate_federated_results(&query, privacy_preserved_results, start_time)
690            .await?;
691
692        // Cache the response
693        self.cache_response(&aggregated_response).await;
694
695        // Update metrics
696        self.update_metrics(&aggregated_response, start_time.elapsed())
697            .await;
698
699        info!(
700            "Federated search completed for query {} with {} results",
701            query.query_id,
702            aggregated_response.results.len()
703        );
704
705        Ok(aggregated_response)
706    }
707
708    /// Get federation health status
709    pub fn get_federation_health(&self) -> HashMap<String, NodeHealthStatus> {
710        let federations = self.federations.read().unwrap();
711        federations
712            .keys()
713            .map(|id| {
714                // Determine health based on trust scores and recent performance
715                let trust_manager = self.trust_manager.read().unwrap();
716                let trust_score = trust_manager.get_trust_score(id).unwrap_or(0.0);
717
718                let health = if trust_score >= 0.8 {
719                    NodeHealthStatus::Healthy
720                } else if trust_score >= 0.5 {
721                    NodeHealthStatus::Degraded
722                } else if trust_score >= 0.2 {
723                    NodeHealthStatus::Unhealthy
724                } else {
725                    NodeHealthStatus::Offline
726                };
727
728                (id.clone(), health)
729            })
730            .collect()
731    }
732
733    /// Get federation performance metrics
734    pub fn get_federation_metrics(&self) -> FederationMetrics {
735        (*self.metrics.read().unwrap()).clone()
736    }
737
738    // Private implementation methods
739
740    fn validate_federation_endpoint(&self, endpoint: &FederationEndpoint) -> Result<()> {
741        if endpoint.federation_id.is_empty() {
742            return Err(anyhow!("Federation ID cannot be empty"));
743        }
744
745        if endpoint.base_url.is_empty() {
746            return Err(anyhow!("Base URL cannot be empty"));
747        }
748
749        if endpoint.trust_level < 0.0 || endpoint.trust_level > 1.0 {
750            return Err(anyhow!("Trust level must be between 0.0 and 1.0"));
751        }
752
753        Ok(())
754    }
755
756    async fn verify_federation_trust(&self, _endpoint: &FederationEndpoint) -> Result<()> {
757        // Placeholder for trust verification logic
758        // In a real implementation, this would involve:
759        // - Certificate validation
760        // - Reputation checking
761        // - Performance testing
762        // - Security assessment
763        Ok(())
764    }
765
766    async fn verify_schema_compatibility(&self, _endpoint: &FederationEndpoint) -> Result<()> {
767        // Placeholder for schema compatibility verification
768        // In a real implementation, this would involve:
769        // - Schema version checking
770        // - Dimension compatibility
771        // - Metadata schema validation
772        // - Transformation capability assessment
773        Ok(())
774    }
775
776    async fn select_target_federations(&self, query: &FederatedQuery) -> Result<Vec<String>> {
777        if !query.target_federations.is_empty() {
778            return Ok(query.target_federations.clone());
779        }
780
781        let federations = self.federations.read().unwrap();
782        let trust_manager = self.trust_manager.read().unwrap();
783
784        let mut eligible_federations = Vec::new();
785
786        for (federation_id, endpoint) in federations.iter() {
787            // Check trust level
788            let trust_score = trust_manager.get_trust_score(federation_id).unwrap_or(0.0);
789            if trust_score < 0.3 {
790                continue;
791            }
792
793            // Check dimension compatibility
794            if !endpoint
795                .supported_dimensions
796                .contains(&query.vector.dimensions)
797            {
798                continue;
799            }
800
801            // Check metric support
802            if !endpoint.supported_metrics.contains(&query.metric) {
803                continue;
804            }
805
806            eligible_federations.push(federation_id.clone());
807        }
808
809        // Limit to max concurrent federations
810        eligible_federations.truncate(self.config.max_concurrent_federations);
811
812        Ok(eligible_federations)
813    }
814
815    async fn execute_parallel_federated_queries(
816        &self,
817        query: &FederatedQuery,
818        target_federations: &[String],
819    ) -> Result<Vec<FederatedSearchResult>> {
820        let mut results = Vec::new();
821
822        // For this implementation, we'll simulate federated query execution
823        // In a real implementation, this would involve HTTP requests to federation endpoints
824
825        for federation_id in target_federations {
826            if let Some(endpoint) = self.federations.read().unwrap().get(federation_id) {
827                // Simulate query execution with some example results
828                let similarity_result = SimilarityResult {
829                    id: format!(
830                        "fed_{}_{}",
831                        federation_id,
832                        std::time::SystemTime::now()
833                            .duration_since(std::time::UNIX_EPOCH)
834                            .unwrap_or_default()
835                            .as_millis()
836                    ),
837                    uri: format!("result_from_{federation_id}"),
838                    similarity: 0.85,
839                    metrics: std::collections::HashMap::new(),
840                    metadata: None,
841                };
842
843                let federated_result = FederatedSearchResult {
844                    query_id: query.query_id.clone(),
845                    federation_id: federation_id.clone(),
846                    result: similarity_result,
847                    confidence: 0.9,
848                    privacy_level: PrivacyMode::Balanced,
849                    trust_score: endpoint.trust_level,
850                    metadata: ResultMetadata {
851                        timestamp: SystemTime::now(),
852                        processing_time_ms: 50,
853                        schema_version: endpoint.schema_info.schema_version.clone(),
854                        provenance: DataProvenance {
855                            source: federation_id.clone(),
856                            transformations: vec!["normalization".to_string()],
857                            quality_checks: vec!["similarity_validation".to_string()],
858                            lineage_hash: "abc123".to_string(),
859                        },
860                    },
861                };
862
863                results.push(federated_result);
864            }
865        }
866
867        Ok(results)
868    }
869
870    async fn apply_privacy_preservation(
871        &self,
872        results: &[FederatedSearchResult],
873        _privacy_requirements: &PrivacyRequirements,
874    ) -> Result<Vec<FederatedSearchResult>> {
875        // For this implementation, we'll return results as-is
876        // In a real implementation, this would apply various privacy mechanisms
877        Ok(results.to_vec())
878    }
879
880    async fn aggregate_federated_results(
881        &self,
882        query: &FederatedQuery,
883        results: Vec<FederatedSearchResult>,
884        start_time: Instant,
885    ) -> Result<FederatedSearchResponse> {
886        let processing_time = start_time.elapsed();
887
888        // Simple aggregation strategy for this implementation
889        let mut aggregated_results = results.clone();
890
891        // Sort by trust-weighted similarity score
892        aggregated_results.sort_by(|a, b| {
893            let score_a = a.result.similarity * a.trust_score * a.confidence;
894            let score_b = b.result.similarity * b.trust_score * b.confidence;
895            score_b.partial_cmp(&score_a).unwrap()
896        });
897
898        // Limit to requested k
899        aggregated_results.truncate(query.k);
900
901        let federation_stats = FederationStatistics {
902            federations_contacted: results.len(),
903            federations_responded: results.len(),
904            total_raw_results: results.len(),
905            aggregated_results: aggregated_results.len(),
906            avg_response_time_ms: processing_time.as_millis() as u64,
907            trust_weighted_quality: aggregated_results
908                .iter()
909                .map(|r| r.result.similarity * r.trust_score)
910                .sum::<f32>()
911                / aggregated_results.len() as f32,
912        };
913
914        let aggregation_metadata = AggregationMetadata {
915            strategy: AggregationStrategy::TrustWeighted,
916            duplicate_removal_stats: DuplicateRemovalStats {
917                original_count: results.len(),
918                duplicates_found: 0,
919                final_count: aggregated_results.len(),
920                similarity_threshold: 0.95,
921            },
922            privacy_preservation: vec!["basic_anonymization".to_string()],
923            quality_enhancements: vec!["trust_weighting".to_string()],
924        };
925
926        Ok(FederatedSearchResponse {
927            query_id: query.query_id.clone(),
928            results: aggregated_results,
929            federation_stats,
930            aggregation_metadata,
931        })
932    }
933
934    fn get_cached_response(&self, query_id: &str) -> Option<FederatedSearchResponse> {
935        self.query_cache.read().unwrap().get(query_id).cloned()
936    }
937
938    async fn cache_response(&self, response: &FederatedSearchResponse) {
939        let mut cache = self.query_cache.write().unwrap();
940        cache.insert(response.query_id.clone(), response.clone());
941    }
942
943    async fn update_metrics(&self, response: &FederatedSearchResponse, elapsed: Duration) {
944        let mut metrics = self.metrics.write().unwrap();
945        metrics.total_queries += 1;
946
947        if !response.results.is_empty() {
948            metrics.successful_queries += 1;
949        } else {
950            metrics.failed_queries += 1;
951        }
952
953        metrics.avg_response_time_ms = (metrics.avg_response_time_ms
954            * (metrics.total_queries - 1) as f64
955            + elapsed.as_millis() as f64)
956            / metrics.total_queries as f64;
957    }
958}
959
960// Implementation of helper structures
961
962impl SchemaCompatibilityEngine {
963    fn new() -> Self {
964        Self {
965            schema_mappings: HashMap::new(),
966            transformation_rules: Vec::new(),
967        }
968    }
969}
970
971impl TrustManager {
972    fn new() -> Self {
973        Self {
974            trust_scores: HashMap::new(),
975            trust_history: HashMap::new(),
976            verification_rules: Vec::new(),
977        }
978    }
979
980    fn initialize_federation_trust(&mut self, federation_id: &str, initial_trust: f32) {
981        self.trust_scores
982            .insert(federation_id.to_string(), initial_trust);
983        self.trust_history
984            .insert(federation_id.to_string(), Vec::new());
985    }
986
987    fn get_trust_score(&self, federation_id: &str) -> Option<f32> {
988        self.trust_scores.get(federation_id).copied()
989    }
990}
991
992impl PrivacyEngine {
993    fn new() -> Self {
994        Self {
995            privacy_policies: HashMap::new(),
996            mechanisms: Vec::new(),
997            budget_tracker: PrivacyBudgetTracker::new(),
998        }
999    }
1000}
1001
1002impl PrivacyBudgetTracker {
1003    fn new() -> Self {
1004        Self {
1005            budget_allocations: HashMap::new(),
1006            budget_usage: HashMap::new(),
1007            renewal_policies: HashMap::new(),
1008        }
1009    }
1010}
1011
1012#[cfg(test)]
1013mod tests {
1014    use super::*;
1015
1016    #[tokio::test]
1017    async fn test_federated_search_creation() {
1018        let config = FederatedSearchConfig::default();
1019        let federated_search = FederatedVectorSearch::new(config).await;
1020        assert!(federated_search.is_ok());
1021    }
1022
1023    #[tokio::test]
1024    async fn test_federation_endpoint_registration() {
1025        let config = FederatedSearchConfig::default();
1026        let federated_search = FederatedVectorSearch::new(config).await.unwrap();
1027
1028        let endpoint = FederationEndpoint {
1029            federation_id: "test_federation".to_string(),
1030            name: "Test Federation".to_string(),
1031            base_url: "https://api.test-federation.com".to_string(),
1032            organization_id: "test_org".to_string(),
1033            trust_level: 0.8,
1034            api_version: "1.0".to_string(),
1035            auth_config: AuthenticationConfig {
1036                auth_type: AuthenticationType::ApiKey,
1037                api_key: Some("test_key".to_string()),
1038                oauth_config: None,
1039                cert_config: None,
1040            },
1041            supported_dimensions: vec![128, 256, 512],
1042            supported_metrics: vec![SimilarityMetric::Cosine],
1043            privacy_capabilities: PrivacyCapabilities {
1044                differential_privacy: true,
1045                k_anonymity: false,
1046                secure_mpc: false,
1047                homomorphic_encryption: false,
1048                privacy_budget: Some(1.0),
1049            },
1050            schema_info: SchemaInfo {
1051                schema_version: "1.0".to_string(),
1052                metadata_schema: HashMap::new(),
1053                supported_types: vec!["f32".to_string()],
1054                dimension_constraints: DimensionConstraints {
1055                    min_dimensions: 64,
1056                    max_dimensions: 1024,
1057                    preferred_dimensions: vec![256, 512],
1058                },
1059            },
1060            performance_profile: PerformanceProfile {
1061                avg_latency_ms: 100,
1062                max_concurrent_queries: 50,
1063                rate_limit_qps: 10.0,
1064                data_freshness_seconds: 300,
1065            },
1066        };
1067
1068        let result = federated_search.register_federation(endpoint).await;
1069        assert!(result.is_ok());
1070
1071        let health_status = federated_search.get_federation_health();
1072        assert_eq!(health_status.len(), 1);
1073        assert_eq!(
1074            health_status.get("test_federation"),
1075            Some(&NodeHealthStatus::Healthy)
1076        );
1077    }
1078
1079    #[tokio::test]
1080    async fn test_federated_search_execution() {
1081        let config = FederatedSearchConfig::default();
1082        let federated_search = FederatedVectorSearch::new(config).await.unwrap();
1083
1084        // Register a test federation
1085        let endpoint = FederationEndpoint {
1086            federation_id: "test_federation".to_string(),
1087            name: "Test Federation".to_string(),
1088            base_url: "https://api.test-federation.com".to_string(),
1089            organization_id: "test_org".to_string(),
1090            trust_level: 0.9,
1091            api_version: "1.0".to_string(),
1092            auth_config: AuthenticationConfig {
1093                auth_type: AuthenticationType::ApiKey,
1094                api_key: Some("test_key".to_string()),
1095                oauth_config: None,
1096                cert_config: None,
1097            },
1098            supported_dimensions: vec![3],
1099            supported_metrics: vec![SimilarityMetric::Cosine],
1100            privacy_capabilities: PrivacyCapabilities {
1101                differential_privacy: true,
1102                k_anonymity: false,
1103                secure_mpc: false,
1104                homomorphic_encryption: false,
1105                privacy_budget: Some(1.0),
1106            },
1107            schema_info: SchemaInfo {
1108                schema_version: "1.0".to_string(),
1109                metadata_schema: HashMap::new(),
1110                supported_types: vec!["f32".to_string()],
1111                dimension_constraints: DimensionConstraints {
1112                    min_dimensions: 1,
1113                    max_dimensions: 10,
1114                    preferred_dimensions: vec![3],
1115                },
1116            },
1117            performance_profile: PerformanceProfile {
1118                avg_latency_ms: 50,
1119                max_concurrent_queries: 100,
1120                rate_limit_qps: 20.0,
1121                data_freshness_seconds: 60,
1122            },
1123        };
1124
1125        federated_search
1126            .register_federation(endpoint)
1127            .await
1128            .unwrap();
1129
1130        // Create a test query
1131        let query = FederatedQuery {
1132            query_id: "test_query_1".to_string(),
1133            vector: Vector::new(vec![1.0, 0.5, 0.8]),
1134            k: 5,
1135            metric: SimilarityMetric::Cosine,
1136            filters: HashMap::new(),
1137            target_federations: vec![],
1138            privacy_requirements: PrivacyRequirements {
1139                min_privacy_level: PrivacyMode::Basic,
1140                allow_aggregation: true,
1141                max_exposure_tolerance: 0.1,
1142            },
1143            quality_requirements: QualityRequirements {
1144                min_quality_threshold: 0.7,
1145                max_latency_ms: 1000,
1146                min_results: 1,
1147                max_staleness_seconds: 300,
1148            },
1149            timeout: Duration::from_secs(5),
1150        };
1151
1152        let response = federated_search.federated_search(query).await.unwrap();
1153
1154        assert_eq!(response.query_id, "test_query_1");
1155        assert!(!response.results.is_empty());
1156        assert!(response.federation_stats.federations_contacted > 0);
1157        assert!(response.federation_stats.federations_responded > 0);
1158    }
1159
1160    #[test]
1161    fn test_privacy_mode_ordering() {
1162        assert!(PrivacyMode::None < PrivacyMode::Basic);
1163        assert!(PrivacyMode::Basic < PrivacyMode::Balanced);
1164        assert!(PrivacyMode::Balanced < PrivacyMode::Strict);
1165    }
1166
1167    #[test]
1168    fn test_schema_compatibility_ordering() {
1169        assert!(SchemaCompatibility::BestEffort < SchemaCompatibility::Compatible);
1170        assert!(SchemaCompatibility::Compatible < SchemaCompatibility::Strict);
1171    }
1172
1173    #[test]
1174    fn test_trust_manager_initialization() {
1175        let mut trust_manager = TrustManager::new();
1176        trust_manager.initialize_federation_trust("test_fed", 0.75);
1177
1178        assert_eq!(trust_manager.get_trust_score("test_fed"), Some(0.75));
1179        assert_eq!(trust_manager.get_trust_score("nonexistent"), None);
1180    }
1181
1182    #[test]
1183    fn test_federation_metrics_initialization() {
1184        let metrics = FederationMetrics::default();
1185        assert_eq!(metrics.total_queries, 0);
1186        assert_eq!(metrics.successful_queries, 0);
1187        assert_eq!(metrics.failed_queries, 0);
1188    }
1189}
oxirs_vec/federated_search.rs

oxirs_vec/
federated_search.rs
