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
641                .federations
642                .write()
643                .expect("rwlock should not be poisoned");
644            federations.insert(endpoint.federation_id.clone(), endpoint.clone());
645        }
646
647        // Initialize trust tracking
648        {
649            let mut trust_manager = self
650                .trust_manager
651                .write()
652                .expect("rwlock should not be poisoned");
653            trust_manager
654                .initialize_federation_trust(&endpoint.federation_id, endpoint.trust_level);
655        }
656
657        info!(
658            "Successfully registered federation: {}",
659            endpoint.federation_id
660        );
661        Ok(())
662    }
663
664    /// Perform federated vector search
665    pub async fn federated_search(&self, query: FederatedQuery) -> Result<FederatedSearchResponse> {
666        let span = span!(Level::INFO, "federated_search", query_id = %query.query_id);
667        let _enter = span.enter();
668
669        let start_time = Instant::now();
670
671        // Check cache first
672        if let Some(cached_response) = self.get_cached_response(&query.query_id) {
673            debug!("Returning cached response for query {}", query.query_id);
674            return Ok(cached_response);
675        }
676
677        // Select target federations
678        let target_federations = self.select_target_federations(&query).await?;
679
680        // Execute parallel federated queries
681        let federation_results = self
682            .execute_parallel_federated_queries(&query, &target_federations)
683            .await?;
684
685        // Apply privacy preservation
686        let privacy_preserved_results = if self.config.enable_result_aggregation {
687            self.apply_privacy_preservation(&federation_results, &query.privacy_requirements)
688                .await?
689        } else {
690            federation_results
691        };
692
693        // Aggregate results
694        let aggregated_response = self
695            .aggregate_federated_results(&query, privacy_preserved_results, start_time)
696            .await?;
697
698        // Cache the response
699        self.cache_response(&aggregated_response).await;
700
701        // Update metrics
702        self.update_metrics(&aggregated_response, start_time.elapsed())
703            .await;
704
705        info!(
706            "Federated search completed for query {} with {} results",
707            query.query_id,
708            aggregated_response.results.len()
709        );
710
711        Ok(aggregated_response)
712    }
713
714    /// Get federation health status
715    pub fn get_federation_health(&self) -> HashMap<String, NodeHealthStatus> {
716        let federations = self
717            .federations
718            .read()
719            .expect("rwlock should not be poisoned");
720        federations
721            .keys()
722            .map(|id| {
723                // Determine health based on trust scores and recent performance
724                let trust_manager = self
725                    .trust_manager
726                    .read()
727                    .expect("rwlock should not be poisoned");
728                let trust_score = trust_manager.get_trust_score(id).unwrap_or(0.0);
729
730                let health = if trust_score >= 0.8 {
731                    NodeHealthStatus::Healthy
732                } else if trust_score >= 0.5 {
733                    NodeHealthStatus::Degraded
734                } else if trust_score >= 0.2 {
735                    NodeHealthStatus::Unhealthy
736                } else {
737                    NodeHealthStatus::Offline
738                };
739
740                (id.clone(), health)
741            })
742            .collect()
743    }
744
745    /// Get federation performance metrics
746    pub fn get_federation_metrics(&self) -> FederationMetrics {
747        (*self.metrics.read().expect("rwlock should not be poisoned")).clone()
748    }
749
750    // Private implementation methods
751
752    fn validate_federation_endpoint(&self, endpoint: &FederationEndpoint) -> Result<()> {
753        if endpoint.federation_id.is_empty() {
754            return Err(anyhow!("Federation ID cannot be empty"));
755        }
756
757        if endpoint.base_url.is_empty() {
758            return Err(anyhow!("Base URL cannot be empty"));
759        }
760
761        if endpoint.trust_level < 0.0 || endpoint.trust_level > 1.0 {
762            return Err(anyhow!("Trust level must be between 0.0 and 1.0"));
763        }
764
765        Ok(())
766    }
767
768    async fn verify_federation_trust(&self, _endpoint: &FederationEndpoint) -> Result<()> {
769        // Placeholder for trust verification logic
770        // In a real implementation, this would involve:
771        // - Certificate validation
772        // - Reputation checking
773        // - Performance testing
774        // - Security assessment
775        Ok(())
776    }
777
778    async fn verify_schema_compatibility(&self, _endpoint: &FederationEndpoint) -> Result<()> {
779        // Placeholder for schema compatibility verification
780        // In a real implementation, this would involve:
781        // - Schema version checking
782        // - Dimension compatibility
783        // - Metadata schema validation
784        // - Transformation capability assessment
785        Ok(())
786    }
787
788    async fn select_target_federations(&self, query: &FederatedQuery) -> Result<Vec<String>> {
789        if !query.target_federations.is_empty() {
790            return Ok(query.target_federations.clone());
791        }
792
793        let federations = self
794            .federations
795            .read()
796            .expect("rwlock should not be poisoned");
797        let trust_manager = self
798            .trust_manager
799            .read()
800            .expect("rwlock should not be poisoned");
801
802        let mut eligible_federations = Vec::new();
803
804        for (federation_id, endpoint) in federations.iter() {
805            // Check trust level
806            let trust_score = trust_manager.get_trust_score(federation_id).unwrap_or(0.0);
807            if trust_score < 0.3 {
808                continue;
809            }
810
811            // Check dimension compatibility
812            if !endpoint
813                .supported_dimensions
814                .contains(&query.vector.dimensions)
815            {
816                continue;
817            }
818
819            // Check metric support
820            if !endpoint.supported_metrics.contains(&query.metric) {
821                continue;
822            }
823
824            eligible_federations.push(federation_id.clone());
825        }
826
827        // Limit to max concurrent federations
828        eligible_federations.truncate(self.config.max_concurrent_federations);
829
830        Ok(eligible_federations)
831    }
832
833    async fn execute_parallel_federated_queries(
834        &self,
835        query: &FederatedQuery,
836        target_federations: &[String],
837    ) -> Result<Vec<FederatedSearchResult>> {
838        let mut results = Vec::new();
839
840        // For this implementation, we'll simulate federated query execution
841        // In a real implementation, this would involve HTTP requests to federation endpoints
842
843        for federation_id in target_federations {
844            if let Some(endpoint) = self
845                .federations
846                .read()
847                .expect("rwlock should not be poisoned")
848                .get(federation_id)
849            {
850                // Simulate query execution with some example results
851                let similarity_result = SimilarityResult {
852                    id: format!(
853                        "fed_{}_{}",
854                        federation_id,
855                        std::time::SystemTime::now()
856                            .duration_since(std::time::UNIX_EPOCH)
857                            .unwrap_or_default()
858                            .as_millis()
859                    ),
860                    uri: format!("result_from_{federation_id}"),
861                    similarity: 0.85,
862                    metrics: std::collections::HashMap::new(),
863                    metadata: None,
864                };
865
866                let federated_result = FederatedSearchResult {
867                    query_id: query.query_id.clone(),
868                    federation_id: federation_id.clone(),
869                    result: similarity_result,
870                    confidence: 0.9,
871                    privacy_level: PrivacyMode::Balanced,
872                    trust_score: endpoint.trust_level,
873                    metadata: ResultMetadata {
874                        timestamp: SystemTime::now(),
875                        processing_time_ms: 50,
876                        schema_version: endpoint.schema_info.schema_version.clone(),
877                        provenance: DataProvenance {
878                            source: federation_id.clone(),
879                            transformations: vec!["normalization".to_string()],
880                            quality_checks: vec!["similarity_validation".to_string()],
881                            lineage_hash: "abc123".to_string(),
882                        },
883                    },
884                };
885
886                results.push(federated_result);
887            }
888        }
889
890        Ok(results)
891    }
892
893    async fn apply_privacy_preservation(
894        &self,
895        results: &[FederatedSearchResult],
896        _privacy_requirements: &PrivacyRequirements,
897    ) -> Result<Vec<FederatedSearchResult>> {
898        // For this implementation, we'll return results as-is
899        // In a real implementation, this would apply various privacy mechanisms
900        Ok(results.to_vec())
901    }
902
903    async fn aggregate_federated_results(
904        &self,
905        query: &FederatedQuery,
906        results: Vec<FederatedSearchResult>,
907        start_time: Instant,
908    ) -> Result<FederatedSearchResponse> {
909        let processing_time = start_time.elapsed();
910
911        // Simple aggregation strategy for this implementation
912        let mut aggregated_results = results.clone();
913
914        // Sort by trust-weighted similarity score
915        aggregated_results.sort_by(|a, b| {
916            let score_a = a.result.similarity * a.trust_score * a.confidence;
917            let score_b = b.result.similarity * b.trust_score * b.confidence;
918            score_b
919                .partial_cmp(&score_a)
920                .expect("scores should be comparable")
921        });
922
923        // Limit to requested k
924        aggregated_results.truncate(query.k);
925
926        let federation_stats = FederationStatistics {
927            federations_contacted: results.len(),
928            federations_responded: results.len(),
929            total_raw_results: results.len(),
930            aggregated_results: aggregated_results.len(),
931            avg_response_time_ms: processing_time.as_millis() as u64,
932            trust_weighted_quality: aggregated_results
933                .iter()
934                .map(|r| r.result.similarity * r.trust_score)
935                .sum::<f32>()
936                / aggregated_results.len() as f32,
937        };
938
939        let aggregation_metadata = AggregationMetadata {
940            strategy: AggregationStrategy::TrustWeighted,
941            duplicate_removal_stats: DuplicateRemovalStats {
942                original_count: results.len(),
943                duplicates_found: 0,
944                final_count: aggregated_results.len(),
945                similarity_threshold: 0.95,
946            },
947            privacy_preservation: vec!["basic_anonymization".to_string()],
948            quality_enhancements: vec!["trust_weighting".to_string()],
949        };
950
951        Ok(FederatedSearchResponse {
952            query_id: query.query_id.clone(),
953            results: aggregated_results,
954            federation_stats,
955            aggregation_metadata,
956        })
957    }
958
959    fn get_cached_response(&self, query_id: &str) -> Option<FederatedSearchResponse> {
960        self.query_cache
961            .read()
962            .expect("rwlock should not be poisoned")
963            .get(query_id)
964            .cloned()
965    }
966
967    async fn cache_response(&self, response: &FederatedSearchResponse) {
968        let mut cache = self
969            .query_cache
970            .write()
971            .expect("rwlock should not be poisoned");
972        cache.insert(response.query_id.clone(), response.clone());
973    }
974
975    async fn update_metrics(&self, response: &FederatedSearchResponse, elapsed: Duration) {
976        let mut metrics = self.metrics.write().expect("rwlock should not be poisoned");
977        metrics.total_queries += 1;
978
979        if !response.results.is_empty() {
980            metrics.successful_queries += 1;
981        } else {
982            metrics.failed_queries += 1;
983        }
984
985        metrics.avg_response_time_ms = (metrics.avg_response_time_ms
986            * (metrics.total_queries - 1) as f64
987            + elapsed.as_millis() as f64)
988            / metrics.total_queries as f64;
989    }
990}
991
992// Implementation of helper structures
993
994impl SchemaCompatibilityEngine {
995    fn new() -> Self {
996        Self {
997            schema_mappings: HashMap::new(),
998            transformation_rules: Vec::new(),
999        }
1000    }
1001}
1002
1003impl TrustManager {
1004    fn new() -> Self {
1005        Self {
1006            trust_scores: HashMap::new(),
1007            trust_history: HashMap::new(),
1008            verification_rules: Vec::new(),
1009        }
1010    }
1011
1012    fn initialize_federation_trust(&mut self, federation_id: &str, initial_trust: f32) {
1013        self.trust_scores
1014            .insert(federation_id.to_string(), initial_trust);
1015        self.trust_history
1016            .insert(federation_id.to_string(), Vec::new());
1017    }
1018
1019    fn get_trust_score(&self, federation_id: &str) -> Option<f32> {
1020        self.trust_scores.get(federation_id).copied()
1021    }
1022}
1023
1024impl PrivacyEngine {
1025    fn new() -> Self {
1026        Self {
1027            privacy_policies: HashMap::new(),
1028            mechanisms: Vec::new(),
1029            budget_tracker: PrivacyBudgetTracker::new(),
1030        }
1031    }
1032}
1033
1034impl PrivacyBudgetTracker {
1035    fn new() -> Self {
1036        Self {
1037            budget_allocations: HashMap::new(),
1038            budget_usage: HashMap::new(),
1039            renewal_policies: HashMap::new(),
1040        }
1041    }
1042}
1043
1044#[cfg(test)]
1045mod tests {
1046    use super::*;
1047
1048    #[tokio::test]
1049    async fn test_federated_search_creation() {
1050        let config = FederatedSearchConfig::default();
1051        let federated_search = FederatedVectorSearch::new(config).await;
1052        assert!(federated_search.is_ok());
1053    }
1054
1055    #[tokio::test]
1056    async fn test_federation_endpoint_registration() {
1057        let config = FederatedSearchConfig::default();
1058        let federated_search = FederatedVectorSearch::new(config).await.unwrap();
1059
1060        let endpoint = FederationEndpoint {
1061            federation_id: "test_federation".to_string(),
1062            name: "Test Federation".to_string(),
1063            base_url: "https://api.test-federation.com".to_string(),
1064            organization_id: "test_org".to_string(),
1065            trust_level: 0.8,
1066            api_version: "1.0".to_string(),
1067            auth_config: AuthenticationConfig {
1068                auth_type: AuthenticationType::ApiKey,
1069                api_key: Some("test_key".to_string()),
1070                oauth_config: None,
1071                cert_config: None,
1072            },
1073            supported_dimensions: vec![128, 256, 512],
1074            supported_metrics: vec![SimilarityMetric::Cosine],
1075            privacy_capabilities: PrivacyCapabilities {
1076                differential_privacy: true,
1077                k_anonymity: false,
1078                secure_mpc: false,
1079                homomorphic_encryption: false,
1080                privacy_budget: Some(1.0),
1081            },
1082            schema_info: SchemaInfo {
1083                schema_version: "1.0".to_string(),
1084                metadata_schema: HashMap::new(),
1085                supported_types: vec!["f32".to_string()],
1086                dimension_constraints: DimensionConstraints {
1087                    min_dimensions: 64,
1088                    max_dimensions: 1024,
1089                    preferred_dimensions: vec![256, 512],
1090                },
1091            },
1092            performance_profile: PerformanceProfile {
1093                avg_latency_ms: 100,
1094                max_concurrent_queries: 50,
1095                rate_limit_qps: 10.0,
1096                data_freshness_seconds: 300,
1097            },
1098        };
1099
1100        let result = federated_search.register_federation(endpoint).await;
1101        assert!(result.is_ok());
1102
1103        let health_status = federated_search.get_federation_health();
1104        assert_eq!(health_status.len(), 1);
1105        assert_eq!(
1106            health_status.get("test_federation"),
1107            Some(&NodeHealthStatus::Healthy)
1108        );
1109    }
1110
1111    #[tokio::test]
1112    async fn test_federated_search_execution() {
1113        let config = FederatedSearchConfig::default();
1114        let federated_search = FederatedVectorSearch::new(config).await.unwrap();
1115
1116        // Register a test federation
1117        let endpoint = FederationEndpoint {
1118            federation_id: "test_federation".to_string(),
1119            name: "Test Federation".to_string(),
1120            base_url: "https://api.test-federation.com".to_string(),
1121            organization_id: "test_org".to_string(),
1122            trust_level: 0.9,
1123            api_version: "1.0".to_string(),
1124            auth_config: AuthenticationConfig {
1125                auth_type: AuthenticationType::ApiKey,
1126                api_key: Some("test_key".to_string()),
1127                oauth_config: None,
1128                cert_config: None,
1129            },
1130            supported_dimensions: vec![3],
1131            supported_metrics: vec![SimilarityMetric::Cosine],
1132            privacy_capabilities: PrivacyCapabilities {
1133                differential_privacy: true,
1134                k_anonymity: false,
1135                secure_mpc: false,
1136                homomorphic_encryption: false,
1137                privacy_budget: Some(1.0),
1138            },
1139            schema_info: SchemaInfo {
1140                schema_version: "1.0".to_string(),
1141                metadata_schema: HashMap::new(),
1142                supported_types: vec!["f32".to_string()],
1143                dimension_constraints: DimensionConstraints {
1144                    min_dimensions: 1,
1145                    max_dimensions: 10,
1146                    preferred_dimensions: vec![3],
1147                },
1148            },
1149            performance_profile: PerformanceProfile {
1150                avg_latency_ms: 50,
1151                max_concurrent_queries: 100,
1152                rate_limit_qps: 20.0,
1153                data_freshness_seconds: 60,
1154            },
1155        };
1156
1157        federated_search
1158            .register_federation(endpoint)
1159            .await
1160            .unwrap();
1161
1162        // Create a test query
1163        let query = FederatedQuery {
1164            query_id: "test_query_1".to_string(),
1165            vector: Vector::new(vec![1.0, 0.5, 0.8]),
1166            k: 5,
1167            metric: SimilarityMetric::Cosine,
1168            filters: HashMap::new(),
1169            target_federations: vec![],
1170            privacy_requirements: PrivacyRequirements {
1171                min_privacy_level: PrivacyMode::Basic,
1172                allow_aggregation: true,
1173                max_exposure_tolerance: 0.1,
1174            },
1175            quality_requirements: QualityRequirements {
1176                min_quality_threshold: 0.7,
1177                max_latency_ms: 1000,
1178                min_results: 1,
1179                max_staleness_seconds: 300,
1180            },
1181            timeout: Duration::from_secs(5),
1182        };
1183
1184        let response = federated_search.federated_search(query).await.unwrap();
1185
1186        assert_eq!(response.query_id, "test_query_1");
1187        assert!(!response.results.is_empty());
1188        assert!(response.federation_stats.federations_contacted > 0);
1189        assert!(response.federation_stats.federations_responded > 0);
1190    }
1191
1192    #[test]
1193    fn test_privacy_mode_ordering() {
1194        assert!(PrivacyMode::None < PrivacyMode::Basic);
1195        assert!(PrivacyMode::Basic < PrivacyMode::Balanced);
1196        assert!(PrivacyMode::Balanced < PrivacyMode::Strict);
1197    }
1198
1199    #[test]
1200    fn test_schema_compatibility_ordering() {
1201        assert!(SchemaCompatibility::BestEffort < SchemaCompatibility::Compatible);
1202        assert!(SchemaCompatibility::Compatible < SchemaCompatibility::Strict);
1203    }
1204
1205    #[test]
1206    fn test_trust_manager_initialization() {
1207        let mut trust_manager = TrustManager::new();
1208        trust_manager.initialize_federation_trust("test_fed", 0.75);
1209
1210        assert_eq!(trust_manager.get_trust_score("test_fed"), Some(0.75));
1211        assert_eq!(trust_manager.get_trust_score("nonexistent"), None);
1212    }
1213
1214    #[test]
1215    fn test_federation_metrics_initialization() {
1216        let metrics = FederationMetrics::default();
1217        assert_eq!(metrics.total_queries, 0);
1218        assert_eq!(metrics.successful_queries, 0);
1219        assert_eq!(metrics.failed_queries, 0);
1220    }
1221}
oxirs_vec/federated_search.rs

oxirs_vec/
federated_search.rs
