oxirs_stream/
bridge.rs

1//! # Message Queue Bridge Module
2//!
3//! This module provides comprehensive message queue integration for external systems:
4//! - Protocol bridging between different message queue systems
5//! - Format conversion and message transformation
6//! - Routing rules and message filtering
7//! - External system adapters
8//! - Performance monitoring and diagnostics
9
10use anyhow::{anyhow, Result};
11use serde::{Deserialize, Serialize};
12use std::collections::{HashMap, VecDeque};
13use std::sync::Arc;
14use std::time::{Duration, Instant};
15use tokio::sync::{broadcast, RwLock};
16use tokio::time::interval;
17use tracing::{debug, error, info, warn};
18use uuid::Uuid;
19
20/// Message queue bridge manager
21pub struct MessageBridgeManager {
22    /// Registered bridges
23    bridges: Arc<RwLock<HashMap<String, MessageBridge>>>,
24    /// Bridge configurations
25    configs: Arc<RwLock<HashMap<String, BridgeConfig>>>,
26    /// Message transformers
27    transformers: Arc<RwLock<HashMap<String, Box<dyn MessageTransformer + Send + Sync>>>>,
28    /// Routing engine
29    router: Arc<RoutingEngine>,
30    /// Statistics
31    stats: Arc<RwLock<BridgeStats>>,
32    /// Event notifier
33    event_notifier: broadcast::Sender<BridgeNotification>,
34}
35
36/// Message bridge
37#[derive(Clone)]
38struct MessageBridge {
39    /// Bridge ID
40    id: String,
41    /// Bridge type
42    bridge_type: BridgeType,
43    /// Source configuration
44    source: ExternalSystemConfig,
45    /// Target configuration
46    target: ExternalSystemConfig,
47    /// Message transformer
48    transformer: String,
49    /// Routing rules
50    routing_rules: Vec<RoutingRule>,
51    /// Bridge status
52    status: BridgeStatus,
53    /// Statistics
54    stats: BridgeStatistics,
55    /// Created timestamp
56    created_at: Instant,
57    /// Last activity
58    last_activity: Option<Instant>,
59}
60
61/// Bridge types
62#[derive(Debug, Clone, Serialize, Deserialize)]
63pub enum BridgeType {
64    /// Bidirectional bridge
65    Bidirectional,
66    /// Source to target only
67    SourceToTarget,
68    /// Target to source only
69    TargetToSource,
70    /// Fanout (one source, multiple targets)
71    Fanout,
72    /// Fanin (multiple sources, one target)
73    Fanin,
74}
75
76/// External system configuration
77#[derive(Debug, Clone, Serialize, Deserialize)]
78pub struct ExternalSystemConfig {
79    /// System type
80    pub system_type: ExternalSystemType,
81    /// Connection configuration
82    pub connection: ConnectionConfig,
83    /// Format configuration
84    pub format: FormatConfig,
85    /// Security configuration
86    pub security: SecurityConfig,
87}
88
89/// External system types
90#[derive(Debug, Clone, Serialize, Deserialize)]
91pub enum ExternalSystemType {
92    /// Apache Kafka
93    Kafka {
94        brokers: Vec<String>,
95        topics: Vec<String>,
96        consumer_group: Option<String>,
97    },
98    /// RabbitMQ
99    RabbitMQ {
100        url: String,
101        exchange: String,
102        routing_key: String,
103        queue: Option<String>,
104    },
105    /// Amazon SQS
106    AmazonSQS {
107        region: String,
108        queue_url: String,
109        credentials: AwsCredentials,
110    },
111    /// Azure Service Bus
112    AzureServiceBus {
113        connection_string: String,
114        queue_name: String,
115    },
116    /// Google Cloud Pub/Sub
117    GooglePubSub {
118        project_id: String,
119        topic: String,
120        subscription: Option<String>,
121    },
122    /// Apache Pulsar
123    Pulsar {
124        service_url: String,
125        topics: Vec<String>,
126        subscription: Option<String>,
127    },
128    /// Redis Pub/Sub
129    RedisPubSub { url: String, channels: Vec<String> },
130    /// HTTP REST API
131    HttpRest {
132        base_url: String,
133        endpoints: HashMap<String, String>,
134        headers: HashMap<String, String>,
135    },
136    /// WebSocket
137    WebSocket { url: String, protocols: Vec<String> },
138    /// File system
139    FileSystem {
140        directory: String,
141        pattern: String,
142        watch_mode: bool,
143    },
144    /// MQTT broker
145    Mqtt {
146        broker_url: String,
147        client_id: String,
148        topic_subscriptions: Vec<String>,
149        qos: u8,
150        username: Option<String>,
151        password: Option<String>,
152    },
153    /// OPC UA server
154    OpcUa {
155        endpoint_url: String,
156        security_policy: String,
157        user_identity: String,
158        node_subscriptions: Vec<String>,
159    },
160    /// Eclipse Sparkplug B (MQTT-based Industry 4.0)
161    SparkplugB {
162        broker_url: String,
163        group_id: String,
164        edge_node_id: String,
165        device_ids: Vec<String>,
166    },
167}
168
169/// AWS credentials
170#[derive(Debug, Clone, Serialize, Deserialize)]
171pub struct AwsCredentials {
172    pub access_key_id: String,
173    pub secret_access_key: String,
174    pub session_token: Option<String>,
175}
176
177/// Connection configuration
178#[derive(Debug, Clone, Serialize, Deserialize)]
179pub struct ConnectionConfig {
180    /// Connection timeout
181    pub timeout: Duration,
182    /// Keep alive interval
183    pub keep_alive: Duration,
184    /// Retry configuration
185    pub retry: RetryConfig,
186    /// SSL/TLS configuration
187    pub tls: Option<TlsConfig>,
188}
189
190/// TLS configuration
191#[derive(Debug, Clone, Serialize, Deserialize)]
192pub struct TlsConfig {
193    pub enabled: bool,
194    pub verify_certificate: bool,
195    pub certificate_path: Option<String>,
196    pub private_key_path: Option<String>,
197    pub ca_certificate_path: Option<String>,
198}
199
200/// Retry configuration
201#[derive(Debug, Clone, Serialize, Deserialize)]
202pub struct RetryConfig {
203    pub max_attempts: u32,
204    pub initial_delay: Duration,
205    pub max_delay: Duration,
206    pub exponential_backoff: bool,
207}
208
209/// Format configuration
210#[derive(Debug, Clone, Serialize, Deserialize)]
211pub struct FormatConfig {
212    /// Message format
213    pub format: MessageFormat,
214    /// Encoding
215    pub encoding: String,
216    /// Compression
217    pub compression: Option<CompressionType>,
218    /// Schema validation
219    pub schema_validation: bool,
220}
221
222/// Message formats
223#[derive(Debug, Clone, Serialize, Deserialize)]
224pub enum MessageFormat {
225    /// JSON format
226    Json,
227    /// Apache Avro
228    Avro { schema: String },
229    /// Protocol Buffers
230    Protobuf { schema: String },
231    /// XML format
232    Xml,
233    /// Plain text
234    Text,
235    /// Binary format
236    Binary,
237    /// Custom format
238    Custom { transformer: String },
239}
240
241/// Compression types
242#[derive(Debug, Clone, Serialize, Deserialize)]
243pub enum CompressionType {
244    Gzip,
245    Snappy,
246    Lz4,
247    Zstd,
248}
249
250/// Security configuration
251#[derive(Debug, Clone, Serialize, Deserialize)]
252pub struct SecurityConfig {
253    /// Authentication method
254    pub auth: AuthenticationMethod,
255    /// Encryption settings
256    pub encryption: EncryptionConfig,
257    /// Access control
258    pub access_control: AccessControlConfig,
259}
260
261/// Authentication methods
262#[derive(Debug, Clone, Serialize, Deserialize)]
263pub enum AuthenticationMethod {
264    None,
265    BasicAuth {
266        username: String,
267        password: String,
268    },
269    BearerToken {
270        token: String,
271    },
272    ApiKey {
273        key: String,
274        header: String,
275    },
276    OAuth2 {
277        client_id: String,
278        client_secret: String,
279        token_url: String,
280    },
281    SaslPlain {
282        username: String,
283        password: String,
284    },
285    SaslScramSha256 {
286        username: String,
287        password: String,
288    },
289    Certificate {
290        cert_path: String,
291        key_path: String,
292    },
293}
294
295/// Encryption configuration
296#[derive(Debug, Clone, Serialize, Deserialize)]
297pub struct EncryptionConfig {
298    pub enabled: bool,
299    pub algorithm: Option<String>,
300    pub key_id: Option<String>,
301}
302
303/// Access control configuration
304#[derive(Debug, Clone, Serialize, Deserialize)]
305pub struct AccessControlConfig {
306    pub read_permissions: Vec<String>,
307    pub write_permissions: Vec<String>,
308    pub admin_permissions: Vec<String>,
309}
310
311/// Routing rule
312#[derive(Debug, Clone, Serialize, Deserialize)]
313pub struct RoutingRule {
314    /// Rule name
315    pub name: String,
316    /// Rule condition
317    pub condition: RuleCondition,
318    /// Rule action
319    pub action: RuleAction,
320    /// Rule priority
321    pub priority: u32,
322    /// Rule enabled
323    pub enabled: bool,
324}
325
326/// Rule condition
327#[derive(Debug, Clone, Serialize, Deserialize)]
328pub enum RuleCondition {
329    /// Always match
330    Always,
331    /// Match event type
332    EventType { types: Vec<String> },
333    /// Match graph
334    Graph { patterns: Vec<String> },
335    /// Match subject pattern
336    SubjectPattern { regex: String },
337    /// Match predicate
338    Predicate { predicates: Vec<String> },
339    /// Custom expression
340    Expression { expr: String },
341    /// Composite condition
342    Composite {
343        operator: LogicalOperator,
344        conditions: Vec<RuleCondition>,
345    },
346}
347
348/// Logical operators
349#[derive(Debug, Clone, Serialize, Deserialize)]
350pub enum LogicalOperator {
351    And,
352    Or,
353    Not,
354}
355
356/// Rule action
357#[derive(Debug, Clone, Serialize, Deserialize)]
358pub enum RuleAction {
359    /// Forward message
360    Forward,
361    /// Drop message
362    Drop,
363    /// Transform message
364    Transform { transformer: String },
365    /// Route to specific target
366    Route { target: String },
367    /// Duplicate message
368    Duplicate { targets: Vec<String> },
369}
370
371/// Bridge status
372#[derive(Debug, Clone, PartialEq)]
373enum BridgeStatus {
374    Active,
375    #[allow(dead_code)]
376    Paused,
377    Stopped,
378    #[allow(dead_code)]
379    Failed {
380        reason: String,
381    },
382}
383
384/// Bridge configuration
385#[derive(Debug, Clone)]
386pub struct BridgeConfig {
387    /// Maximum message queue size
388    pub max_queue_size: usize,
389    /// Batch size for processing
390    pub batch_size: usize,
391    /// Processing interval
392    pub processing_interval: Duration,
393    /// Enable monitoring
394    pub enable_monitoring: bool,
395    /// Enable dead letter queue
396    pub enable_dlq: bool,
397    /// Message TTL
398    pub message_ttl: Duration,
399}
400
401impl Default for BridgeConfig {
402    fn default() -> Self {
403        Self {
404            max_queue_size: 10000,
405            batch_size: 100,
406            processing_interval: Duration::from_millis(100),
407            enable_monitoring: true,
408            enable_dlq: true,
409            message_ttl: Duration::from_secs(24 * 60 * 60),
410        }
411    }
412}
413
414/// Bridge statistics
415#[derive(Debug, Clone, Default)]
416pub struct BridgeStatistics {
417    /// Messages received
418    pub messages_received: u64,
419    /// Messages sent
420    pub messages_sent: u64,
421    /// Messages dropped
422    pub messages_dropped: u64,
423    /// Messages failed
424    pub messages_failed: u64,
425    /// Transform errors
426    pub transform_errors: u64,
427    /// Average processing time
428    pub avg_processing_time: Duration,
429    /// Last activity
430    pub last_activity: Option<Instant>,
431}
432
433/// Manager statistics
434#[derive(Debug, Clone, Default)]
435pub struct BridgeStats {
436    /// Total bridges
437    pub total_bridges: usize,
438    /// Active bridges
439    pub active_bridges: usize,
440    /// Total messages processed
441    pub total_messages: u64,
442    /// Failed messages
443    pub failed_messages: u64,
444    /// Average processing time
445    pub avg_processing_time: Duration,
446}
447
448/// Bridge notification events
449#[derive(Debug, Clone)]
450pub enum BridgeNotification {
451    /// Bridge created
452    BridgeCreated { id: String, bridge_type: BridgeType },
453    /// Bridge started
454    BridgeStarted { id: String },
455    /// Bridge stopped
456    BridgeStopped { id: String },
457    /// Bridge failed
458    BridgeFailed { id: String, reason: String },
459    /// Message processed
460    MessageProcessed {
461        bridge_id: String,
462        message_id: String,
463        duration: Duration,
464    },
465    /// Message failed
466    MessageFailed {
467        bridge_id: String,
468        message_id: String,
469        error: String,
470    },
471}
472
473/// Message transformer trait
474pub trait MessageTransformer {
475    /// Transform message from source format to target format
476    fn transform(&self, message: &ExternalMessage) -> Result<ExternalMessage>;
477
478    /// Get transformer name
479    fn name(&self) -> &str;
480
481    /// Get supported formats
482    fn supported_formats(&self) -> (MessageFormat, MessageFormat);
483}
484
485/// External message representation
486#[derive(Debug, Clone, Serialize, Deserialize)]
487pub struct ExternalMessage {
488    /// Message ID
489    pub id: String,
490    /// Message headers
491    pub headers: HashMap<String, String>,
492    /// Message payload
493    pub payload: Vec<u8>,
494    /// Message format
495    pub format: MessageFormat,
496    /// Timestamp
497    pub timestamp: chrono::DateTime<chrono::Utc>,
498    /// Source system
499    pub source: String,
500    /// Message metadata
501    pub metadata: HashMap<String, String>,
502}
503
504/// Routing engine
505struct RoutingEngine {
506    /// Global routing rules
507    _global_rules: Arc<RwLock<Vec<RoutingRule>>>,
508    /// Bridge-specific rules cache
509    _rule_cache: Arc<RwLock<HashMap<String, Vec<RoutingRule>>>>,
510}
511
512impl MessageBridgeManager {
513    /// Create a new message bridge manager
514    pub async fn new() -> Result<Self> {
515        let (tx, _) = broadcast::channel(1000);
516
517        Ok(Self {
518            bridges: Arc::new(RwLock::new(HashMap::new())),
519            configs: Arc::new(RwLock::new(HashMap::new())),
520            transformers: Arc::new(RwLock::new(HashMap::new())),
521            router: Arc::new(RoutingEngine::new()),
522            stats: Arc::new(RwLock::new(BridgeStats::default())),
523            event_notifier: tx,
524        })
525    }
526
527    /// Register a message transformer
528    pub async fn register_transformer(
529        &self,
530        transformer: Box<dyn MessageTransformer + Send + Sync>,
531    ) {
532        let name = transformer.name().to_string();
533        self.transformers.write().await.insert(name, transformer);
534        info!("Registered message transformer");
535    }
536
537    /// Create a message bridge
538    pub async fn create_bridge(
539        &self,
540        bridge_type: BridgeType,
541        source: ExternalSystemConfig,
542        target: ExternalSystemConfig,
543        transformer: String,
544        routing_rules: Vec<RoutingRule>,
545        config: BridgeConfig,
546    ) -> Result<String> {
547        // Validate transformer exists
548        if !self.transformers.read().await.contains_key(&transformer) {
549            return Err(anyhow!("Transformer not found: {}", transformer));
550        }
551
552        // Generate bridge ID
553        let bridge_id = Uuid::new_v4().to_string();
554
555        // Create bridge
556        let bridge = MessageBridge {
557            id: bridge_id.clone(),
558            bridge_type: bridge_type.clone(),
559            source,
560            target,
561            transformer,
562            routing_rules,
563            status: BridgeStatus::Stopped,
564            stats: BridgeStatistics::default(),
565            created_at: Instant::now(),
566            last_activity: None,
567        };
568
569        // Register bridge
570        self.bridges.write().await.insert(bridge_id.clone(), bridge);
571        self.configs.write().await.insert(bridge_id.clone(), config);
572
573        // Update statistics
574        let mut stats = self.stats.write().await;
575        stats.total_bridges += 1;
576        drop(stats);
577
578        // Notify
579        let _ = self.event_notifier.send(BridgeNotification::BridgeCreated {
580            id: bridge_id.clone(),
581            bridge_type,
582        });
583
584        info!("Created message bridge: {}", bridge_id);
585        Ok(bridge_id)
586    }
587
588    /// Start a bridge
589    pub async fn start_bridge(&self, bridge_id: &str) -> Result<()> {
590        let bridge_exists = {
591            let mut bridges = self.bridges.write().await;
592            if let Some(bridge) = bridges.get_mut(bridge_id) {
593                bridge.status = BridgeStatus::Active;
594                true
595            } else {
596                false
597            }
598        };
599
600        if !bridge_exists {
601            return Err(anyhow!("Bridge not found"));
602        }
603
604        // Start bridge processing
605        self.start_bridge_processing(bridge_id).await?;
606
607        // Update statistics
608        self.stats.write().await.active_bridges += 1;
609
610        // Notify
611        let _ = self.event_notifier.send(BridgeNotification::BridgeStarted {
612            id: bridge_id.to_string(),
613        });
614
615        info!("Started bridge: {}", bridge_id);
616        Ok(())
617    }
618
619    /// Stop a bridge
620    pub async fn stop_bridge(&self, bridge_id: &str) -> Result<()> {
621        let mut bridges = self.bridges.write().await;
622        let bridge = bridges
623            .get_mut(bridge_id)
624            .ok_or_else(|| anyhow!("Bridge not found"))?;
625
626        bridge.status = BridgeStatus::Stopped;
627
628        // Update statistics
629        self.stats.write().await.active_bridges = bridges
630            .values()
631            .filter(|b| b.status == BridgeStatus::Active)
632            .count();
633
634        // Notify
635        let _ = self.event_notifier.send(BridgeNotification::BridgeStopped {
636            id: bridge_id.to_string(),
637        });
638
639        info!("Stopped bridge: {}", bridge_id);
640        Ok(())
641    }
642
643    /// Start bridge processing
644    async fn start_bridge_processing(&self, bridge_id: &str) -> Result<()> {
645        // Clone all necessary data before spawning the task
646        let bridge = {
647            let bridges_guard = self.bridges.read().await;
648            bridges_guard
649                .get(bridge_id)
650                .ok_or_else(|| anyhow!("Bridge not found"))?
651                .clone()
652        };
653
654        let config = {
655            let configs_guard = self.configs.read().await;
656            configs_guard
657                .get(bridge_id)
658                .ok_or_else(|| anyhow!("Bridge config not found"))?
659                .clone()
660        };
661
662        let bridges = self.bridges.clone();
663        let transformers = self.transformers.clone();
664        let router = self.router.clone();
665        let stats = self.stats.clone();
666        let event_notifier = self.event_notifier.clone();
667        let bridge_id = bridge_id.to_string();
668
669        tokio::spawn(async move {
670            let mut interval = interval(config.processing_interval);
671            let mut message_queue = VecDeque::new();
672
673            loop {
674                interval.tick().await;
675
676                // Check if bridge is still active
677                let status = {
678                    let bridges_guard = bridges.read().await;
679                    bridges_guard.get(&bridge_id).map(|b| b.status.clone())
680                };
681
682                if let Some(BridgeStatus::Active) = status {
683                    // Process messages from source
684                    match MessageBridgeManager::receive_messages(&bridge.source, &config).await {
685                        Ok(messages) => {
686                            for message in messages {
687                                message_queue.push_back(message);
688
689                                // Limit queue size
690                                if message_queue.len() > config.max_queue_size {
691                                    message_queue.pop_front();
692                                    warn!("Bridge queue full, dropping oldest message");
693                                }
694                            }
695                        }
696                        Err(e) => {
697                            error!("Failed to receive messages for bridge {}: {}", bridge_id, e);
698                        }
699                    }
700
701                    // Process queued messages in batches
702                    let batch_size = config.batch_size.min(message_queue.len());
703                    if batch_size > 0 {
704                        let batch: Vec<_> = message_queue.drain(..batch_size).collect();
705
706                        for message in batch {
707                            let start_time = Instant::now();
708
709                            match MessageBridgeManager::process_message(
710                                &bridge,
711                                &message,
712                                &transformers,
713                                &router,
714                            )
715                            .await
716                            {
717                                Ok(_) => {
718                                    let duration = start_time.elapsed();
719
720                                    // Update bridge statistics
721                                    MessageBridgeManager::update_bridge_stats(
722                                        &bridges, &bridge_id, true, duration,
723                                    )
724                                    .await;
725                                    stats.write().await.total_messages += 1;
726
727                                    let _ =
728                                        event_notifier.send(BridgeNotification::MessageProcessed {
729                                            bridge_id: bridge_id.clone(),
730                                            message_id: message.id.clone(),
731                                            duration,
732                                        });
733                                }
734                                Err(e) => {
735                                    let duration = start_time.elapsed();
736
737                                    error!(
738                                        "Failed to process message {} in bridge {}: {}",
739                                        message.id, bridge_id, e
740                                    );
741
742                                    // Update bridge statistics
743                                    MessageBridgeManager::update_bridge_stats(
744                                        &bridges, &bridge_id, false, duration,
745                                    )
746                                    .await;
747                                    stats.write().await.failed_messages += 1;
748
749                                    let _ =
750                                        event_notifier.send(BridgeNotification::MessageFailed {
751                                            bridge_id: bridge_id.clone(),
752                                            message_id: message.id.clone(),
753                                            error: e.to_string(),
754                                        });
755
756                                    // Send to dead letter queue if enabled
757                                    if config.enable_dlq {
758                                        // This would implement DLQ logic
759                                        warn!("Message sent to dead letter queue: {}", message.id);
760                                    }
761                                }
762                            }
763                        }
764                    }
765                } else {
766                    // Bridge is not active, exit loop
767                    break;
768                }
769            }
770        });
771
772        Ok(())
773    }
774
775    /// Receive messages from external system
776    async fn receive_messages(
777        source: &ExternalSystemConfig,
778        config: &BridgeConfig,
779    ) -> Result<Vec<ExternalMessage>> {
780        match &source.system_type {
781            ExternalSystemType::Kafka {
782                brokers,
783                topics,
784                consumer_group,
785            } => Self::receive_kafka_messages(brokers, topics, consumer_group, config).await,
786            ExternalSystemType::RabbitMQ {
787                url,
788                exchange,
789                routing_key,
790                queue,
791            } => Self::receive_rabbitmq_messages(url, exchange, routing_key, queue, config).await,
792            ExternalSystemType::RedisPubSub { url, channels } => {
793                Self::receive_redis_messages(url, channels, config).await
794            }
795            ExternalSystemType::HttpRest {
796                base_url,
797                endpoints,
798                headers,
799            } => Self::receive_http_messages(base_url, endpoints, headers, config).await,
800            ExternalSystemType::FileSystem {
801                directory,
802                pattern,
803                watch_mode,
804            } => Self::receive_file_messages(directory, pattern, *watch_mode, config).await,
805            _ => {
806                warn!("Message receiving not implemented for this system type");
807                Ok(vec![])
808            }
809        }
810    }
811
812    /// Receive messages from Kafka
813    async fn receive_kafka_messages(
814        _brokers: &[String],
815        _topics: &[String],
816        _consumer_group: &Option<String>,
817        _config: &BridgeConfig,
818    ) -> Result<Vec<ExternalMessage>> {
819        // This would implement Kafka consumer logic
820        // For now, return empty to avoid compilation errors
821        Ok(vec![])
822    }
823
824    /// Receive messages from RabbitMQ
825    async fn receive_rabbitmq_messages(
826        _url: &str,
827        _exchange: &str,
828        _routing_key: &str,
829        _queue: &Option<String>,
830        _config: &BridgeConfig,
831    ) -> Result<Vec<ExternalMessage>> {
832        // This would implement RabbitMQ consumer logic
833        Ok(vec![])
834    }
835
836    /// Receive messages from Redis
837    async fn receive_redis_messages(
838        _url: &str,
839        _channels: &[String],
840        _config: &BridgeConfig,
841    ) -> Result<Vec<ExternalMessage>> {
842        // This would implement Redis Pub/Sub consumer logic
843        Ok(vec![])
844    }
845
846    /// Receive messages from HTTP endpoints
847    async fn receive_http_messages(
848        _base_url: &str,
849        _endpoints: &HashMap<String, String>,
850        _headers: &HashMap<String, String>,
851        _config: &BridgeConfig,
852    ) -> Result<Vec<ExternalMessage>> {
853        // This would implement HTTP polling logic
854        Ok(vec![])
855    }
856
857    /// Receive messages from file system
858    async fn receive_file_messages(
859        _directory: &str,
860        _pattern: &str,
861        _watch_mode: bool,
862        _config: &BridgeConfig,
863    ) -> Result<Vec<ExternalMessage>> {
864        // This would implement file system watching logic
865        Ok(vec![])
866    }
867
868    /// Process a message through the bridge
869    async fn process_message(
870        bridge: &MessageBridge,
871        message: &ExternalMessage,
872        transformers: &Arc<RwLock<HashMap<String, Box<dyn MessageTransformer + Send + Sync>>>>,
873        router: &Arc<RoutingEngine>,
874    ) -> Result<()> {
875        // Apply routing rules
876        let action = router
877            .evaluate_rules(&bridge.routing_rules, message)
878            .await?;
879
880        match action {
881            RuleAction::Drop => {
882                debug!("Message dropped by routing rule: {}", message.id);
883                return Ok(());
884            }
885            RuleAction::Forward => {
886                // Continue with normal processing
887            }
888            RuleAction::Transform { transformer } => {
889                // Apply specific transformer
890                let transformed = {
891                    let transformers_guard = transformers.read().await;
892                    let transformer = transformers_guard
893                        .get(&transformer)
894                        .ok_or_else(|| anyhow!("Transformer not found: {}", transformer))?;
895                    transformer.transform(message)?
896                };
897
898                return Self::send_message(&bridge.target, &transformed).await;
899            }
900            _ => {
901                // Handle other actions
902                warn!("Routing action not implemented: {:?}", action);
903            }
904        }
905
906        // Apply default transformation
907        let transformed = {
908            let transformers_guard = transformers.read().await;
909            let transformer = transformers_guard
910                .get(&bridge.transformer)
911                .ok_or_else(|| anyhow!("Transformer not found: {}", bridge.transformer))?;
912            transformer.transform(message)?
913        };
914
915        // Send to target
916        Self::send_message(&bridge.target, &transformed).await
917    }
918
919    /// Send message to external system
920    async fn send_message(target: &ExternalSystemConfig, message: &ExternalMessage) -> Result<()> {
921        match &target.system_type {
922            ExternalSystemType::Kafka {
923                brokers, topics, ..
924            } => Self::send_kafka_message(brokers, topics, message).await,
925            ExternalSystemType::RabbitMQ {
926                url,
927                exchange,
928                routing_key,
929                ..
930            } => Self::send_rabbitmq_message(url, exchange, routing_key, message).await,
931            ExternalSystemType::RedisPubSub { url, channels } => {
932                Self::send_redis_message(url, channels, message).await
933            }
934            ExternalSystemType::HttpRest {
935                base_url,
936                endpoints,
937                headers,
938            } => Self::send_http_message(base_url, endpoints, headers, message).await,
939            ExternalSystemType::FileSystem { directory, .. } => {
940                Self::send_file_message(directory, message).await
941            }
942            _ => {
943                warn!("Message sending not implemented for this system type");
944                Ok(())
945            }
946        }
947    }
948
949    /// Send message to Kafka
950    async fn send_kafka_message(
951        _brokers: &[String],
952        _topics: &[String],
953        _message: &ExternalMessage,
954    ) -> Result<()> {
955        // This would implement Kafka producer logic
956        Ok(())
957    }
958
959    /// Send message to RabbitMQ
960    async fn send_rabbitmq_message(
961        _url: &str,
962        _exchange: &str,
963        _routing_key: &str,
964        _message: &ExternalMessage,
965    ) -> Result<()> {
966        // This would implement RabbitMQ publisher logic
967        Ok(())
968    }
969
970    /// Send message to Redis
971    async fn send_redis_message(
972        _url: &str,
973        _channels: &[String],
974        _message: &ExternalMessage,
975    ) -> Result<()> {
976        // This would implement Redis Pub/Sub publisher logic
977        Ok(())
978    }
979
980    /// Send message via HTTP
981    async fn send_http_message(
982        _base_url: &str,
983        _endpoints: &HashMap<String, String>,
984        _headers: &HashMap<String, String>,
985        _message: &ExternalMessage,
986    ) -> Result<()> {
987        // This would implement HTTP POST logic
988        Ok(())
989    }
990
991    /// Send message to file system
992    async fn send_file_message(_directory: &str, _message: &ExternalMessage) -> Result<()> {
993        // This would implement file writing logic
994        Ok(())
995    }
996
997    /// Update bridge statistics
998    async fn update_bridge_stats(
999        bridges: &Arc<RwLock<HashMap<String, MessageBridge>>>,
1000        bridge_id: &str,
1001        success: bool,
1002        duration: Duration,
1003    ) {
1004        let mut bridges_guard = bridges.write().await;
1005        if let Some(bridge) = bridges_guard.get_mut(bridge_id) {
1006            bridge.last_activity = Some(Instant::now());
1007
1008            if success {
1009                bridge.stats.messages_sent += 1;
1010            } else {
1011                bridge.stats.messages_failed += 1;
1012            }
1013
1014            // Update average processing time
1015            let total_messages = bridge.stats.messages_sent + bridge.stats.messages_failed;
1016            if total_messages > 0 {
1017                let avg_nanos = bridge.stats.avg_processing_time.as_nanos() as u64;
1018                let duration_nanos = duration.as_nanos() as u64;
1019                let new_avg_nanos =
1020                    (avg_nanos * (total_messages - 1) + duration_nanos) / total_messages;
1021                bridge.stats.avg_processing_time = Duration::from_nanos(new_avg_nanos);
1022            }
1023        }
1024    }
1025
1026    /// Get bridge statistics
1027    pub async fn get_bridge_stats(&self, bridge_id: &str) -> Result<BridgeStatistics> {
1028        let bridges = self.bridges.read().await;
1029        let bridge = bridges
1030            .get(bridge_id)
1031            .ok_or_else(|| anyhow!("Bridge not found"))?;
1032
1033        Ok(bridge.stats.clone())
1034    }
1035
1036    /// Get manager statistics
1037    pub async fn get_stats(&self) -> BridgeStats {
1038        self.stats.read().await.clone()
1039    }
1040
1041    /// List all bridges
1042    pub async fn list_bridges(&self) -> Vec<BridgeInfo> {
1043        let bridges = self.bridges.read().await;
1044        bridges
1045            .values()
1046            .map(|b| BridgeInfo {
1047                id: b.id.clone(),
1048                bridge_type: b.bridge_type.clone(),
1049                status: format!("{:?}", b.status),
1050                created_at: b.created_at.elapsed(),
1051                last_activity: b.last_activity.map(|t| t.elapsed()),
1052                messages_processed: b.stats.messages_sent + b.stats.messages_failed,
1053                success_rate: if b.stats.messages_sent + b.stats.messages_failed > 0 {
1054                    b.stats.messages_sent as f64
1055                        / (b.stats.messages_sent + b.stats.messages_failed) as f64
1056                } else {
1057                    0.0
1058                },
1059            })
1060            .collect()
1061    }
1062
1063    /// Subscribe to bridge notifications
1064    pub fn subscribe(&self) -> broadcast::Receiver<BridgeNotification> {
1065        self.event_notifier.subscribe()
1066    }
1067}
1068
1069/// Bridge information
1070#[derive(Debug, Clone, Serialize, Deserialize)]
1071pub struct BridgeInfo {
1072    pub id: String,
1073    pub bridge_type: BridgeType,
1074    pub status: String,
1075    pub created_at: Duration,
1076    pub last_activity: Option<Duration>,
1077    pub messages_processed: u64,
1078    pub success_rate: f64,
1079}
1080
1081impl RoutingEngine {
1082    /// Create a new routing engine
1083    fn new() -> Self {
1084        Self {
1085            _global_rules: Arc::new(RwLock::new(Vec::new())),
1086            _rule_cache: Arc::new(RwLock::new(HashMap::new())),
1087        }
1088    }
1089
1090    /// Evaluate routing rules for a message
1091    async fn evaluate_rules(
1092        &self,
1093        rules: &[RoutingRule],
1094        message: &ExternalMessage,
1095    ) -> Result<RuleAction> {
1096        // Sort rules by priority
1097        let mut sorted_rules = rules.to_vec();
1098        sorted_rules.sort_by_key(|r| r.priority);
1099
1100        // Evaluate rules in priority order
1101        for rule in sorted_rules.iter().filter(|r| r.enabled) {
1102            if self.evaluate_condition(&rule.condition, message).await? {
1103                return Ok(rule.action.clone());
1104            }
1105        }
1106
1107        // Default action is forward
1108        Ok(RuleAction::Forward)
1109    }
1110
1111    /// Evaluate a rule condition
1112    #[allow(clippy::only_used_in_recursion)]
1113    fn evaluate_condition<'a>(
1114        &'a self,
1115        condition: &'a RuleCondition,
1116        message: &'a ExternalMessage,
1117    ) -> std::pin::Pin<Box<dyn std::future::Future<Output = Result<bool>> + Send + 'a>> {
1118        Box::pin(async move {
1119            match condition {
1120                RuleCondition::Always => Ok(true),
1121                RuleCondition::EventType { types } => {
1122                    let unknown = "unknown".to_string();
1123                    let event_type = message
1124                        .headers
1125                        .get("event_type")
1126                        .or_else(|| message.metadata.get("event_type"))
1127                        .unwrap_or(&unknown);
1128                    Ok(types.contains(event_type))
1129                }
1130                RuleCondition::Graph { patterns } => {
1131                    let graph = message
1132                        .headers
1133                        .get("graph")
1134                        .or_else(|| message.metadata.get("graph"));
1135                    if let Some(g) = graph {
1136                        Ok(patterns.iter().any(|p| g.contains(p)))
1137                    } else {
1138                        Ok(false)
1139                    }
1140                }
1141                RuleCondition::SubjectPattern { regex } => {
1142                    let subject = message
1143                        .headers
1144                        .get("subject")
1145                        .or_else(|| message.metadata.get("subject"));
1146                    if let Some(s) = subject {
1147                        let re = regex::Regex::new(regex)
1148                            .map_err(|e| anyhow!("Invalid regex: {}", e))?;
1149                        Ok(re.is_match(s))
1150                    } else {
1151                        Ok(false)
1152                    }
1153                }
1154                RuleCondition::Predicate { predicates } => {
1155                    let predicate = message
1156                        .headers
1157                        .get("predicate")
1158                        .or_else(|| message.metadata.get("predicate"));
1159                    if let Some(p) = predicate {
1160                        Ok(predicates.contains(p))
1161                    } else {
1162                        Ok(false)
1163                    }
1164                }
1165                RuleCondition::Expression { expr } => {
1166                    // This would implement expression evaluation
1167                    warn!("Expression evaluation not implemented: {}", expr);
1168                    Ok(false)
1169                }
1170                RuleCondition::Composite {
1171                    operator,
1172                    conditions,
1173                } => match operator {
1174                    LogicalOperator::And => {
1175                        for cond in conditions {
1176                            if !self.evaluate_condition(cond, message).await? {
1177                                return Ok(false);
1178                            }
1179                        }
1180                        Ok(true)
1181                    }
1182                    LogicalOperator::Or => {
1183                        for cond in conditions {
1184                            if self.evaluate_condition(cond, message).await? {
1185                                return Ok(true);
1186                            }
1187                        }
1188                        Ok(false)
1189                    }
1190                    LogicalOperator::Not => {
1191                        if conditions.len() != 1 {
1192                            return Err(anyhow!("NOT operator requires exactly one condition"));
1193                        }
1194                        Ok(!self.evaluate_condition(&conditions[0], message).await?)
1195                    }
1196                },
1197            }
1198        })
1199    }
1200}
1201
1202/// JSON message transformer
1203pub struct JsonTransformer;
1204
1205impl MessageTransformer for JsonTransformer {
1206    fn transform(&self, message: &ExternalMessage) -> Result<ExternalMessage> {
1207        // This would implement JSON transformation logic
1208        Ok(message.clone())
1209    }
1210
1211    fn name(&self) -> &str {
1212        "json"
1213    }
1214
1215    fn supported_formats(&self) -> (MessageFormat, MessageFormat) {
1216        (MessageFormat::Json, MessageFormat::Json)
1217    }
1218}
1219
1220/// RDF to JSON transformer
1221pub struct RdfToJsonTransformer;
1222
1223impl MessageTransformer for RdfToJsonTransformer {
1224    fn transform(&self, message: &ExternalMessage) -> Result<ExternalMessage> {
1225        // This would implement RDF to JSON transformation
1226        let mut transformed = message.clone();
1227        transformed.format = MessageFormat::Json;
1228
1229        // Transform payload from RDF to JSON
1230        // For now, just pass through
1231
1232        Ok(transformed)
1233    }
1234
1235    fn name(&self) -> &str {
1236        "rdf-to-json"
1237    }
1238
1239    fn supported_formats(&self) -> (MessageFormat, MessageFormat) {
1240        (MessageFormat::Text, MessageFormat::Json) // Assuming RDF as text
1241    }
1242}
1243
1244#[cfg(test)]
1245mod tests {
1246    use super::*;
1247
1248    #[tokio::test]
1249    async fn test_bridge_creation() {
1250        let manager = MessageBridgeManager::new().await.unwrap();
1251
1252        let source = ExternalSystemConfig {
1253            system_type: ExternalSystemType::Kafka {
1254                brokers: vec!["localhost:9092".to_string()],
1255                topics: vec!["source-topic".to_string()],
1256                consumer_group: Some("test-group".to_string()),
1257            },
1258            connection: ConnectionConfig {
1259                timeout: Duration::from_secs(30),
1260                keep_alive: Duration::from_secs(60),
1261                retry: RetryConfig {
1262                    max_attempts: 3,
1263                    initial_delay: Duration::from_millis(100),
1264                    max_delay: Duration::from_secs(10),
1265                    exponential_backoff: true,
1266                },
1267                tls: None,
1268            },
1269            format: FormatConfig {
1270                format: MessageFormat::Json,
1271                encoding: "utf-8".to_string(),
1272                compression: None,
1273                schema_validation: false,
1274            },
1275            security: SecurityConfig {
1276                auth: AuthenticationMethod::None,
1277                encryption: EncryptionConfig {
1278                    enabled: false,
1279                    algorithm: None,
1280                    key_id: None,
1281                },
1282                access_control: AccessControlConfig {
1283                    read_permissions: vec![],
1284                    write_permissions: vec![],
1285                    admin_permissions: vec![],
1286                },
1287            },
1288        };
1289
1290        let target = source.clone(); // Same config for simplicity
1291
1292        // Register transformer
1293        manager
1294            .register_transformer(Box::new(JsonTransformer))
1295            .await;
1296
1297        let bridge_id = manager
1298            .create_bridge(
1299                BridgeType::SourceToTarget,
1300                source,
1301                target,
1302                "json".to_string(),
1303                vec![],
1304                BridgeConfig::default(),
1305            )
1306            .await
1307            .unwrap();
1308
1309        assert!(!bridge_id.is_empty());
1310
1311        let bridges = manager.list_bridges().await;
1312        assert_eq!(bridges.len(), 1);
1313        assert_eq!(bridges[0].id, bridge_id);
1314    }
1315
1316    #[tokio::test]
1317    async fn test_routing_rules() {
1318        let engine = RoutingEngine::new();
1319
1320        let rule = RoutingRule {
1321            name: "test-rule".to_string(),
1322            condition: RuleCondition::EventType {
1323                types: vec!["triple_added".to_string()],
1324            },
1325            action: RuleAction::Forward,
1326            priority: 1,
1327            enabled: true,
1328        };
1329
1330        let mut message = ExternalMessage {
1331            id: "test".to_string(),
1332            headers: HashMap::new(),
1333            payload: vec![],
1334            format: MessageFormat::Json,
1335            timestamp: chrono::Utc::now(),
1336            source: "test".to_string(),
1337            metadata: HashMap::new(),
1338        };
1339
1340        message
1341            .headers
1342            .insert("event_type".to_string(), "triple_added".to_string());
1343
1344        let action = engine.evaluate_rules(&[rule], &message).await.unwrap();
1345        assert!(matches!(action, RuleAction::Forward));
1346    }
1347}
oxirs_stream/bridge.rs

oxirs_stream/
bridge.rs
