quantrs2_tytan/realtime_quantum_integration/
fault.rs

1//! Fault detection types for Real-time Quantum Computing Integration
2//!
3//! This module provides fault detection and recovery types.
4
5use serde::{Deserialize, Serialize};
6use std::collections::{HashMap, VecDeque};
7use std::time::{Duration, SystemTime};
8
9use super::config::RealtimeConfig;
10use super::state::SystemState;
11use super::types::{FaultDetectionMethod, FaultType, IssueSeverity, RecoveryStepType};
12
13/// Automated fault detection and recovery system
14pub struct FaultDetectionSystem {
15    /// Fault detectors
16    pub(crate) fault_detectors: Vec<FaultDetector>,
17    /// Recovery procedures
18    pub(crate) recovery_procedures: HashMap<FaultType, RecoveryProcedure>,
19    /// Fault history
20    pub(crate) fault_history: VecDeque<FaultEvent>,
21    /// Recovery statistics
22    pub(crate) recovery_stats: RecoveryStatistics,
23}
24
25impl Default for FaultDetectionSystem {
26    fn default() -> Self {
27        Self::new()
28    }
29}
30
31impl FaultDetectionSystem {
32    pub fn new() -> Self {
33        Self {
34            fault_detectors: vec![],
35            recovery_procedures: HashMap::new(),
36            fault_history: VecDeque::new(),
37            recovery_stats: RecoveryStatistics::default(),
38        }
39    }
40
41    pub fn check_for_faults(
42        &mut self,
43        system_state: &SystemState,
44        config: &RealtimeConfig,
45    ) -> Result<(), String> {
46        // Check for various fault conditions
47        self.check_performance_degradation(system_state, config)?;
48        self.check_resource_exhaustion(system_state, config)?;
49        self.check_hardware_issues(system_state, config)?;
50        Ok(())
51    }
52
53    fn check_performance_degradation(
54        &mut self,
55        system_state: &SystemState,
56        _config: &RealtimeConfig,
57    ) -> Result<(), String> {
58        if system_state.performance_summary.performance_score < 0.5 {
59            self.detect_fault(
60                FaultType::PerformanceDegradation,
61                IssueSeverity::High,
62                "Performance score below threshold".to_string(),
63            )?;
64        }
65        Ok(())
66    }
67
68    fn check_resource_exhaustion(
69        &mut self,
70        system_state: &SystemState,
71        config: &RealtimeConfig,
72    ) -> Result<(), String> {
73        if system_state.resource_utilization.cpu_utilization > config.alert_thresholds.cpu_threshold
74        {
75            self.detect_fault(
76                FaultType::PerformanceDegradation,
77                IssueSeverity::Medium,
78                "High CPU utilization".to_string(),
79            )?;
80        }
81        Ok(())
82    }
83
84    const fn check_hardware_issues(
85        &self,
86        _system_state: &SystemState,
87        _config: &RealtimeConfig,
88    ) -> Result<(), String> {
89        // Check for hardware-related issues
90        Ok(())
91    }
92
93    fn detect_fault(
94        &mut self,
95        fault_type: FaultType,
96        severity: IssueSeverity,
97        description: String,
98    ) -> Result<(), String> {
99        let fault_event = FaultEvent {
100            timestamp: SystemTime::now(),
101            fault_type: fault_type.clone(),
102            severity,
103            affected_components: vec!["system".to_string()],
104            detection_method: "threshold_based".to_string(),
105            description,
106            recovery_action: None,
107            recovery_success: None,
108        };
109
110        self.fault_history.push_back(fault_event);
111        if self.fault_history.len() > 10000 {
112            self.fault_history.pop_front();
113        }
114
115        // Attempt automatic recovery if enabled
116        self.attempt_recovery(&fault_type)?;
117
118        Ok(())
119    }
120
121    fn attempt_recovery(&mut self, fault_type: &FaultType) -> Result<(), String> {
122        if let Some(_procedure) = self.recovery_procedures.get(fault_type) {
123            // Execute recovery procedure
124            println!("Executing recovery procedure for fault: {fault_type:?}");
125            // Implementation would execute actual recovery steps
126            self.recovery_stats.successful_recoveries += 1;
127        }
128        Ok(())
129    }
130}
131
132/// Fault detector
133#[derive(Debug, Clone)]
134pub struct FaultDetector {
135    /// Detector name
136    pub name: String,
137    /// Detection method
138    pub detection_method: FaultDetectionMethod,
139    /// Monitoring targets
140    pub targets: Vec<String>,
141    /// Detection threshold
142    pub threshold: f64,
143    /// Check interval
144    pub check_interval: Duration,
145}
146
147/// Fault event
148#[derive(Debug, Clone, Serialize, Deserialize)]
149pub struct FaultEvent {
150    /// Event timestamp
151    pub timestamp: SystemTime,
152    /// Fault type
153    pub fault_type: FaultType,
154    /// Severity
155    pub severity: IssueSeverity,
156    /// Affected components
157    pub affected_components: Vec<String>,
158    /// Detection method
159    pub detection_method: String,
160    /// Fault description
161    pub description: String,
162    /// Recovery action taken
163    pub recovery_action: Option<String>,
164    /// Recovery success
165    pub recovery_success: Option<bool>,
166}
167
168/// Recovery procedure
169#[derive(Debug, Clone, Serialize, Deserialize)]
170pub struct RecoveryProcedure {
171    /// Procedure name
172    pub name: String,
173    /// Recovery steps
174    pub steps: Vec<RecoveryStep>,
175    /// Success criteria
176    pub success_criteria: Vec<SuccessCriterion>,
177    /// Rollback procedure
178    pub rollback_procedure: Option<Vec<RecoveryStep>>,
179    /// Maximum attempts
180    pub max_attempts: usize,
181}
182
183/// Recovery step
184#[derive(Debug, Clone, Serialize, Deserialize)]
185pub struct RecoveryStep {
186    /// Step name
187    pub name: String,
188    /// Step type
189    pub step_type: RecoveryStepType,
190    /// Parameters
191    pub parameters: HashMap<String, String>,
192    /// Timeout
193    pub timeout: Duration,
194    /// Retry on failure
195    pub retry_on_failure: bool,
196}
197
198/// Success criterion for recovery
199#[derive(Debug, Clone, Serialize, Deserialize)]
200pub struct SuccessCriterion {
201    /// Metric to check
202    pub metric: String,
203    /// Expected value or range
204    pub expected_value: ExpectedValue,
205    /// Check timeout
206    pub timeout: Duration,
207}
208
209/// Expected value types
210#[derive(Debug, Clone, Serialize, Deserialize)]
211pub enum ExpectedValue {
212    Exact(f64),
213    Range(f64, f64),
214    LessThan(f64),
215    GreaterThan(f64),
216    Boolean(bool),
217}
218
219/// Recovery statistics
220#[derive(Debug, Clone, Serialize, Deserialize)]
221pub struct RecoveryStatistics {
222    /// Total faults detected
223    pub total_faults: usize,
224    /// Successful recoveries
225    pub successful_recoveries: usize,
226    /// Failed recoveries
227    pub failed_recoveries: usize,
228    /// Average recovery time
229    pub average_recovery_time: Duration,
230    /// Recovery success rate by fault type
231    pub success_rate_by_type: HashMap<FaultType, f64>,
232}
233
234impl Default for RecoveryStatistics {
235    fn default() -> Self {
236        Self {
237            total_faults: 0,
238            successful_recoveries: 0,
239            failed_recoveries: 0,
240            average_recovery_time: Duration::ZERO,
241            success_rate_by_type: HashMap::new(),
242        }
243    }
244}
quantrs2_tytan/realtime_quantum_integration/fault.rs

quantrs2_tytan/realtime_quantum_integration/
fault.rs
