🦀 🦀 TuskLang Rust Troubleshooting Guide
🦀 TuskLang Rust Troubleshooting Guide
"We don't bow to any king" - Rust Edition
Master troubleshooting for TuskLang Rust applications. From common errors to performance issues, from debugging techniques to recovery strategies - learn how to diagnose and resolve problems quickly and effectively.
🔍 Common Error Patterns
Parsing Errors
use tusklang_rust::{parse, Parser};
use std::error::Error;#[tokio::main]
async fn troubleshoot_parsing_errors() -> Result<(), Box<dyn Error>> {
println!("🔍 Troubleshooting Parsing Errors...");
let mut parser = Parser::new();
// 1. Syntax Error - Missing closing bracket
println!("1. Testing syntax error handling...");
let invalid_tsk = r#"
[app
name: "TestApp"
version: "1.0.0"
"#;
match parser.parse(invalid_tsk).await {
Ok(_) => println!("❌ Should have failed - missing closing bracket"),
Err(e) => {
println!("✅ Correctly caught syntax error: {}", e);
// Provide helpful error message
if e.to_string().contains("unexpected end of input") {
println!("💡 Tip: Check for missing closing brackets or quotes");
}
}
}
// 2. Type Error - Invalid data type
println!("2. Testing type error handling...");
let type_error_tsk = r#"
[config]
port: "not_a_number"
enabled: "not_a_boolean"
"#;
match parser.parse(type_error_tsk).await {
Ok(data) => {
// Try to access with wrong type
match data["config"]["port"].as_u64() {
Some(_) => println!("❌ Should have failed - string cannot be converted to number"),
None => println!("✅ Correctly handled type conversion error"),
}
}
Err(e) => println!("✅ Caught type error: {}", e),
}
// 3. Variable Reference Error
println!("3. Testing variable reference error handling...");
let var_error_tsk = r#"
[config]
name: $undefined_variable
value: ${another_undefined}
"#;
match parser.parse(var_error_tsk).await {
Ok(_) => println!("❌ Should have failed - undefined variables"),
Err(e) => {
println!("✅ Correctly caught variable reference error: {}", e);
println!("💡 Tip: Define variables before using them with $ syntax");
}
}
// 4. @ Operator Error
println!("4. Testing @ operator error handling...");
let operator_error_tsk = r#"
[config]
api_key: @env("MISSING_API_KEY")
database_url: @query("SELECT * FROM nonexistent_table")
"#;
match parser.parse(operator_error_tsk).await {
Ok(data) => {
println!("✅ Parsed successfully, but @ operators may have issues");
// Check if @ operators resolved correctly
let api_key = data["config"]["api_key"].as_str().unwrap_or("");
if api_key.is_empty() {
println!("⚠️ Environment variable MISSING_API_KEY not found");
}
}
Err(e) => println!("✅ Caught @ operator error: {}", e),
}
Ok(())
}
Database Connection Errors
use tusklang_rust::{parse, Parser, adapters::postgresql::{PostgreSQLAdapter, PostgreSQLConfig}};
use std::time::Duration;#[tokio::main]
async fn troubleshoot_database_errors() -> Result<(), Box<dyn std::error::Error>> {
println!("🗄️ Troubleshooting Database Errors...");
let mut parser = Parser::new();
// 1. Connection Timeout
println!("1. Testing connection timeout handling...");
let timeout_config = PostgreSQLConfig {
host: "nonexistent-host".to_string(),
port: 5432,
database: "testdb".to_string(),
user: "postgres".to_string(),
password: "password".to_string(),
ssl_mode: "disable".to_string(),
};
match PostgreSQLAdapter::new_with_timeout(timeout_config, Duration::from_secs(5)).await {
Ok(_) => println!("❌ Should have failed - host doesn't exist"),
Err(e) => {
println!("✅ Correctly caught connection timeout: {}", e);
println!("💡 Tip: Check hostname, port, and network connectivity");
}
}
// 2. Authentication Error
println!("2. Testing authentication error handling...");
let auth_config = PostgreSQLConfig {
host: "localhost".to_string(),
port: 5432,
database: "testdb".to_string(),
user: "wrong_user".to_string(),
password: "wrong_password".to_string(),
ssl_mode: "disable".to_string(),
};
match PostgreSQLAdapter::new(auth_config).await {
Ok(_) => println!("⚠️ Authentication succeeded (unexpected)"),
Err(e) => {
println!("✅ Correctly caught authentication error: {}", e);
println!("💡 Tip: Verify username and password");
}
}
// 3. Query Error
println!("3. Testing query error handling...");
// Setup working database connection
let working_config = PostgreSQLConfig {
host: "localhost".to_string(),
port: 5432,
database: "testdb".to_string(),
user: "postgres".to_string(),
password: "password".to_string(),
ssl_mode: "disable".to_string(),
};
match PostgreSQLAdapter::new(working_config).await {
Ok(db) => {
parser.set_database_adapter(db);
// Test invalid query
let invalid_query = "SELECT * FROM nonexistent_table";
match parser.query(invalid_query).await {
Ok(_) => println!("❌ Should have failed - table doesn't exist"),
Err(e) => {
println!("✅ Correctly caught query error: {}", e);
println!("💡 Tip: Check table names and SQL syntax");
}
}
}
Err(e) => println!("⚠️ Could not connect to database: {}", e),
}
Ok(())
}
FUJSEN Execution Errors
use tusklang_rust::{parse, Parser};#[tokio::main]
async fn troubleshoot_fujsen_errors() -> Result<(), Box<dyn std::error::Error>> {
println!("⚡ Troubleshooting FUJSEN Errors...");
let mut parser = Parser::new();
// 1. Syntax Error in FUJSEN
println!("1. Testing FUJSEN syntax error handling...");
let syntax_error_tsk = r#"
[math]
add_fujsen = '''
fn add(a: i32, b: i32) -> i32 {
a + b // Missing semicolon
}
'''
"#;
match parser.parse(syntax_error_tsk).await {
Ok(_) => {
// Try to execute the function
match parser.execute_fujsen("math", "add", &[&5, &3]).await {
Ok(_) => println!("❌ Should have failed - syntax error in FUJSEN"),
Err(e) => {
println!("✅ Correctly caught FUJSEN syntax error: {}", e);
println!("💡 Tip: Check Rust syntax in FUJSEN functions");
}
}
}
Err(e) => println!("✅ Caught parsing error: {}", e),
}
// 2. Type Mismatch Error
println!("2. Testing type mismatch error handling...");
let type_error_tsk = r#"
[utils]
process_fujsen = '''
fn process(data: Vec<i32>) -> i32 {
data.iter().sum()
}
'''
"#;
parser.parse(type_error_tsk).await?;
// Pass wrong type
match parser.execute_fujsen("utils", "process", &[&"not_a_vector"]).await {
Ok(_) => println!("❌ Should have failed - wrong parameter type"),
Err(e) => {
println!("✅ Correctly caught type mismatch error: {}", e);
println!("💡 Tip: Ensure parameter types match function signature");
}
}
// 3. Runtime Error in FUJSEN
println!("3. Testing runtime error handling...");
let runtime_error_tsk = r#"
[math]
divide_fujsen = '''
fn divide(a: i32, b: i32) -> i32 {
a / b // Will panic if b is 0
}
'''
"#;
parser.parse(runtime_error_tsk).await?;
// Division by zero
match parser.execute_fujsen("math", "divide", &[&10, &0]).await {
Ok(_) => println!("❌ Should have failed - division by zero"),
Err(e) => {
println!("✅ Correctly caught runtime error: {}", e);
println!("💡 Tip: Add error handling in FUJSEN functions");
}
}
// 4. Memory Error in FUJSEN
println!("4. Testing memory error handling...");
let memory_error_tsk = r#"
[utils]
allocate_fujsen = '''
fn allocate(size: usize) -> Vec<u8> {
vec![0u8; size] // Could panic if size is too large
}
'''
"#;
parser.parse(memory_error_tsk).await?;
// Try to allocate too much memory
match parser.execute_fujsen("utils", "allocate", &[&usize::MAX]).await {
Ok(_) => println!("⚠️ Memory allocation succeeded (unexpected)"),
Err(e) => {
println!("✅ Correctly caught memory error: {}", e);
println!("💡 Tip: Add bounds checking for memory allocations");
}
}
Ok(())
}
🐛 Debugging Techniques
Logging and Tracing
use tusklang_rust::{parse, Parser};
use tracing::{info, warn, error, debug};
use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};#[tokio::main]
async fn setup_debugging() -> Result<(), Box<dyn std::error::Error>> {
println!("🐛 Setting Up Debugging...");
// Initialize tracing
tracing_subscriber::registry()
.with(tracing_subscriber::EnvFilter::new(
std::env::var("RUST_LOG").unwrap_or_else(|_| "info".into()),
))
.with(tracing_subscriber::fmt::layer())
.init();
let mut parser = Parser::new();
// Enable debug mode
parser.set_debug_mode(true);
let tsk_content = r#"
[debug]
enabled: true
log_level: "debug"
trace_parsing: true
trace_execution: true
"#;
info!("Starting TuskLang parser with debug mode");
match parser.parse(tsk_content).await {
Ok(data) => {
debug!("Successfully parsed configuration: {:?}", data);
info!("Debug mode enabled: {}", data["debug"]["enabled"]);
}
Err(e) => {
error!("Failed to parse configuration: {}", e);
return Err(e.into());
}
}
// Test with problematic configuration
let problematic_tsk = r#"
[test]
value: 42
nested {
deep {
value: "test"
}
}
"#;
debug!("Parsing problematic configuration...");
match parser.parse(problematic_tsk).await {
Ok(data) => {
debug!("Successfully parsed problematic config: {:?}", data);
}
Err(e) => {
warn!("Failed to parse problematic config: {}", e);
// Provide detailed error information
error!("Error details:");
error!(" Type: {:?}", std::any::type_name::<dyn std::error::Error>());
error!(" Source: {:?}", e.source());
}
}
Ok(())
}
Interactive Debugging
use tusklang_rust::{parse, Parser};
use std::io::{self, Write};#[tokio::main]
async fn interactive_debugging() -> Result<(), Box<dyn std::error::Error>> {
println!("🔧 Interactive Debugging Mode");
println!("Type 'help' for available commands");
let mut parser = Parser::new();
let mut config_data = None;
loop {
print!("tusk-debug> ");
io::stdout().flush()?;
let mut input = String::new();
io::stdin().read_line(&mut input)?;
let input = input.trim();
match input {
"help" => {
println!("Available commands:");
println!(" parse <file> - Parse a TSK file");
println!(" eval <expr> - Evaluate an expression");
println!(" query <sql> - Execute a database query");
println!(" fujsen <func> - Execute a FUJSEN function");
println!(" inspect <path> - Inspect configuration value");
println!(" reload - Reload configuration");
println!(" quit - Exit debugger");
}
input if input.starts_with("parse ") => {
let file = &input[6..];
println!("Parsing file: {}", file);
match parser.parse_file(file).await {
Ok(data) => {
config_data = Some(data);
println!("✅ Successfully parsed {}", file);
}
Err(e) => {
println!("❌ Failed to parse {}: {}", file, e);
}
}
}
input if input.starts_with("eval ") => {
let expr = &input[5..];
println!("Evaluating: {}", expr);
match parser.evaluate_expression(expr).await {
Ok(result) => {
println!("Result: {:?}", result);
}
Err(e) => {
println!("❌ Evaluation failed: {}", e);
}
}
}
input if input.starts_with("query ") => {
let sql = &input[6..];
println!("Executing query: {}", sql);
match parser.query(sql).await {
Ok(result) => {
println!("Query result: {:?}", result);
}
Err(e) => {
println!("❌ Query failed: {}", e);
}
}
}
input if input.starts_with("fujsen ") => {
let func_call = &input[7..];
let parts: Vec<&str> = func_call.split_whitespace().collect();
if parts.len() >= 3 {
let module = parts[0];
let function = parts[1];
let args: Vec<&str> = parts[2..].to_vec();
println!("Executing FUJSEN: {}.{}({:?})", module, function, args);
match parser.execute_fujsen(module, function, &args).await {
Ok(result) => {
println!("FUJSEN result: {:?}", result);
}
Err(e) => {
println!("❌ FUJSEN execution failed: {}", e);
}
}
} else {
println!("❌ Invalid FUJSEN command format. Use: fujsen <module> <function> <args...>");
}
}
input if input.starts_with("inspect ") => {
let path = &input[8..];
println!("Inspecting: {}", path);
if let Some(data) = &config_data {
// Simple path inspection (you'd implement proper path parsing)
if let Some(value) = data.get(path) {
println!("Value: {:?}", value);
} else {
println!("❌ Path not found: {}", path);
}
} else {
println!("❌ No configuration loaded. Use 'parse <file>' first.");
}
}
"reload" => {
println!("Reloading configuration...");
// Implementation would reload the last parsed file
println!("✅ Configuration reloaded");
}
"quit" => {
println!("Goodbye!");
break;
}
"" => continue,
_ => {
println!("❌ Unknown command: {}", input);
println!("Type 'help' for available commands");
}
}
}
Ok(())
}
🔧 Performance Troubleshooting
Memory Leaks
use tusklang_rust::{parse, Parser};
use std::alloc::{alloc, dealloc, Layout};
use std::sync::Arc;
use parking_lot::Mutex;struct MemoryTracker {
allocations: Arc<Mutex<HashMap<*mut u8, usize>>>,
total_allocated: Arc<Mutex<usize>>,
}
impl MemoryTracker {
fn new() -> Self {
Self {
allocations: Arc::new(Mutex::new(HashMap::new())),
total_allocated: Arc::new(Mutex::new(0)),
}
}
fn track_allocation(&self, ptr: *mut u8, size: usize) {
self.allocations.lock().insert(ptr, size);
*self.total_allocated.lock() += size;
}
fn track_deallocation(&self, ptr: *mut u8) {
if let Some(size) = self.allocations.lock().remove(&ptr) {
*self.total_allocated.lock() -= size;
}
}
fn get_total_allocated(&self) -> usize {
*self.total_allocated.lock()
}
fn get_allocation_count(&self) -> usize {
self.allocations.lock().len()
}
}
#[tokio::main]
async fn troubleshoot_memory_leaks() -> Result<(), Box<dyn std::error::Error>> {
println!("💾 Troubleshooting Memory Leaks...");
let memory_tracker = MemoryTracker::new();
let mut parser = Parser::new();
// Set memory tracker
parser.set_memory_tracker(Arc::new(memory_tracker.clone()));
println!("Initial memory usage: {} bytes ({} allocations)",
memory_tracker.get_total_allocated(),
memory_tracker.get_allocation_count());
// Simulate memory-intensive operations
for i in 0..1000 {
let tsk_content = format!(r#"
[test_{}]
value: {}
string: "test_string_{}"
array: [1, 2, 3, 4, 5]
object: {{
key: "value_{}"
nested: {{
deep: "data_{}"
}}
}}
"#, i, i, i, i, i);
match parser.parse(&tsk_content).await {
Ok(_) => {
if i % 100 == 0 {
println!("Processed {} configurations", i);
println!("Memory usage: {} bytes ({} allocations)",
memory_tracker.get_total_allocated(),
memory_tracker.get_allocation_count());
}
}
Err(e) => {
println!("❌ Failed to parse configuration {}: {}", i, e);
}
}
}
// Force garbage collection
parser.force_garbage_collection().await;
println!("Final memory usage: {} bytes ({} allocations)",
memory_tracker.get_total_allocated(),
memory_tracker.get_allocation_count());
// Check for memory leaks
let final_allocations = memory_tracker.get_allocation_count();
if final_allocations > 0 {
println!("⚠️ Potential memory leak detected: {} allocations not freed", final_allocations);
} else {
println!("✅ No memory leaks detected");
}
Ok(())
}
Performance Bottlenecks
use tusklang_rust::{parse, Parser};
use std::time::{Duration, Instant};
use std::collections::HashMap;struct PerformanceProfiler {
measurements: HashMap<String, Vec<Duration>>,
}
impl PerformanceProfiler {
fn new() -> Self {
Self {
measurements: HashMap::new(),
}
}
fn start_measurement(&self, name: &str) -> Instant {
Instant::now()
}
fn end_measurement(&mut self, name: &str, start: Instant) {
let duration = start.elapsed();
self.measurements.entry(name.to_string())
.or_insert_with(Vec::new)
.push(duration);
}
fn get_statistics(&self, name: &str) -> Option<(Duration, Duration, Duration)> {
self.measurements.get(name).map(|durations| {
let total: Duration = durations.iter().sum();
let avg = total / durations.len() as u32;
let max = durations.iter().max().unwrap().clone();
let min = durations.iter().min().unwrap().clone();
(avg, min, max)
})
}
fn print_report(&self) {
println!("📊 Performance Report");
println!("{}", "=".repeat(50));
for (name, durations) in &self.measurements {
let total: Duration = durations.iter().sum();
let avg = total / durations.len() as u32;
let max = durations.iter().max().unwrap();
let min = durations.iter().min().unwrap();
println!("{}:", name);
println!(" Count: {}", durations.len());
println!(" Average: {:?}", avg);
println!(" Min: {:?}", min);
println!(" Max: {:?}", max);
println!(" Total: {:?}", total);
println!();
}
}
}
#[tokio::main]
async fn troubleshoot_performance_bottlenecks() -> Result<(), Box<dyn std::error::Error>> {
println!("⚡ Troubleshooting Performance Bottlenecks...");
let mut profiler = PerformanceProfiler::new();
let mut parser = Parser::new();
// Test parsing performance
let tsk_content = r#"
[application]
name: "PerformanceTest"
version: "1.0.0"
[database]
host: "localhost"
port: 5432
name: "testdb"
user: "postgres"
password: "secret"
[server]
host: "0.0.0.0"
port: 8080
workers: 8
threads_per_worker: 4
[cache]
redis_host: "localhost"
redis_port: 6379
ttl: "5m"
[logging]
level: "info"
format: "json"
file: "/var/log/app.log"
[security]
jwt_secret: "your-secret-key"
bcrypt_rounds: 12
session_timeout: "24h"
"#;
// Measure parsing performance
for i in 0..100 {
let start = profiler.start_measurement("parsing");
let _result = parser.parse(tsk_content).await?;
profiler.end_measurement("parsing", start);
}
// Measure FUJSEN execution performance
let fujsen_tsk = r#"
[math]
add_fujsen = '''
fn add(a: i32, b: i32) -> i32 {
a + b
}
'''
"#;
parser.parse(fujsen_tsk).await?;
for i in 0..1000 {
let start = profiler.start_measurement("fujsen_execution");
let _result = parser.execute_fujsen("math", "add", &[&i, &i]).await?;
profiler.end_measurement("fujsen_execution", start);
}
// Measure database query performance
// SQLiteAdapter is not imported, assuming it's available or needs to be added
// For the purpose of this example, we'll simulate a database connection
// In a real scenario, you'd use an actual adapter like PostgreSQLAdapter
let db = SQLiteAdapter::new(":memory:").await?;
db.execute("CREATE TABLE test (id INTEGER, value TEXT)").await?;
parser.set_database_adapter(db);
for i in 0..100 {
let start = profiler.start_measurement("database_query");
let _result = parser.query("SELECT * FROM test").await?;
profiler.end_measurement("database_query", start);
}
// Print performance report
profiler.print_report();
// Identify bottlenecks
if let Some((avg, _, _)) = profiler.get_statistics("parsing") {
if avg > Duration::from_millis(10) {
println!("⚠️ Parsing performance bottleneck detected: {:?} average", avg);
println!("💡 Tip: Consider optimizing TSK file structure or using caching");
}
}
if let Some((avg, _, _)) = profiler.get_statistics("fujsen_execution") {
if avg > Duration::from_micros(100) {
println!("⚠️ FUJSEN execution bottleneck detected: {:?} average", avg);
println!("💡 Tip: Optimize FUJSEN functions or use caching");
}
}
if let Some((avg, _, _)) = profiler.get_statistics("database_query") {
if avg > Duration::from_millis(5) {
println!("⚠️ Database query bottleneck detected: {:?} average", avg);
println!("💡 Tip: Add database indexes or implement query caching");
}
}
Ok(())
}
🔄 Recovery Strategies
Automatic Recovery
use tusklang_rust::{parse, Parser};
use std::sync::Arc;
use tokio::sync::Mutex;
use std::time::{Duration, Instant};struct RecoveryManager {
last_backup: Arc<Mutex<Instant>>,
backup_interval: Duration,
max_retries: usize,
}
impl RecoveryManager {
fn new(backup_interval: Duration, max_retries: usize) -> Self {
Self {
last_backup: Arc::new(Mutex::new(Instant::now())),
backup_interval,
max_retries,
}
}
async fn should_backup(&self) -> bool {
let last_backup = *self.last_backup.lock().await;
Instant::now().duration_since(last_backup) >= self.backup_interval
}
async fn update_backup_time(&self) {
*self.last_backup.lock().await = Instant::now();
}
async fn retry_operation<F, T, E>(&self, operation: F) -> Result<T, E>
where
F: Fn() -> Result<T, E> + Send + Sync,
E: std::fmt::Debug,
{
let mut last_error = None;
for attempt in 1..=self.max_retries {
match operation() {
Ok(result) => {
if attempt > 1 {
println!("✅ Operation succeeded on attempt {}", attempt);
}
return Ok(result);
}
Err(e) => {
last_error = Some(e);
println!("⚠️ Operation failed on attempt {}: {:?}", attempt, last_error);
if attempt < self.max_retries {
// Exponential backoff
let delay = Duration::from_millis(100 * 2_u64.pow(attempt as u32));
tokio::time::sleep(delay).await;
}
}
}
}
Err(last_error.unwrap())
}
}
#[tokio::main]
async fn implement_recovery_strategies() -> Result<(), Box<dyn std::error::Error>> {
println!("🔄 Implementing Recovery Strategies...");
let recovery_manager = RecoveryManager::new(
Duration::from_secs(300), // 5 minutes
3, // max retries
);
let mut parser = Parser::new();
// 1. Automatic backup strategy
println!("1. Setting up automatic backup strategy...");
if recovery_manager.should_backup().await {
println!("Creating backup...");
// Create backup of configuration
let backup_content = r#"
[backup]
timestamp: @date.now()
version: "1.0.0"
"#;
std::fs::write("backup.tsk", backup_content)?;
recovery_manager.update_backup_time().await;
println!("✅ Backup created successfully");
}
// 2. Retry strategy for database operations
println!("2. Implementing retry strategy for database operations...");
let db_operation = || {
// Simulate database operation that might fail
if rand::random::<f64>() < 0.7 {
Ok("Database operation successful")
} else {
Err("Database connection failed")
}
};
match recovery_manager.retry_operation(db_operation).await {
Ok(result) => println!("✅ Database operation succeeded: {}", result),
Err(e) => println!("❌ Database operation failed after retries: {:?}", e),
}
// 3. Circuit breaker pattern
println!("3. Implementing circuit breaker pattern...");
let mut circuit_breaker = CircuitBreaker::new(5, Duration::from_secs(60));
for i in 0..10 {
match circuit_breaker.call(|| {
// Simulate external service call
if rand::random::<f64>() < 0.3 {
Ok("Service call successful")
} else {
Err("Service call failed")
}
}).await {
Ok(result) => println!("✅ Service call {} succeeded: {}", i, result),
Err(e) => println!("❌ Service call {} failed: {:?}", i, e),
}
}
// 4. Graceful degradation
println!("4. Implementing graceful degradation...");
let tsk_content = r#"
[degradation]
fallback_enabled: true
cache_fallback: true
database_fallback: true
"#;
let config = parser.parse(tsk_content).await?;
if config["degradation"]["fallback_enabled"].as_bool().unwrap_or(false) {
println!("✅ Graceful degradation enabled");
// Try primary service
match call_primary_service().await {
Ok(result) => println!("✅ Primary service: {}", result),
Err(_) => {
println!("⚠️ Primary service failed, using fallback");
// Use fallback service
match call_fallback_service().await {
Ok(result) => println!("✅ Fallback service: {}", result),
Err(e) => println!("❌ Fallback service also failed: {:?}", e),
}
}
}
}
Ok(())
}
// Circuit breaker implementation
struct CircuitBreaker {
failure_count: usize,
max_failures: usize,
reset_timeout: Duration,
last_failure: Option<Instant>,
state: CircuitState,
}
enum CircuitState {
Closed,
Open,
HalfOpen,
}
impl CircuitBreaker {
fn new(max_failures: usize, reset_timeout: Duration) -> Self {
Self {
failure_count: 0,
max_failures,
reset_timeout,
last_failure: None,
state: CircuitState::Closed,
}
}
async fn call<F, T, E>(&mut self, operation: F) -> Result<T, E>
where
F: FnOnce() -> Result<T, E>,
{
match self.state {
CircuitState::Open => {
if let Some(last_failure) = self.last_failure {
if Instant::now().duration_since(last_failure) >= self.reset_timeout {
self.state = CircuitState::HalfOpen;
println!("🔄 Circuit breaker transitioning to half-open");
} else {
return Err(operation().unwrap_err());
}
}
}
CircuitState::HalfOpen | CircuitState::Closed => {}
}
match operation() {
Ok(result) => {
self.on_success();
Ok(result)
}
Err(e) => {
self.on_failure();
Err(e)
}
}
}
fn on_success(&mut self) {
self.failure_count = 0;
self.state = CircuitState::Closed;
}
fn on_failure(&mut self) {
self.failure_count += 1;
self.last_failure = Some(Instant::now());
if self.failure_count >= self.max_failures {
self.state = CircuitState::Open;
println!("🚨 Circuit breaker opened due to {} failures", self.failure_count);
}
}
}
// Mock service calls
async fn call_primary_service() -> Result<String, Box<dyn std::error::Error>> {
if rand::random::<f64>() < 0.8 {
Ok("Primary service response".to_string())
} else {
Err("Primary service unavailable".into())
}
}
async fn call_fallback_service() -> Result<String, Box<dyn std::error::Error>> {
if rand::random::<f64>() < 0.9 {
Ok("Fallback service response".to_string())
} else {
Err("Fallback service unavailable".into())
}
}
🎯 What You've Learned
1. Common error patterns - Parsing errors, database connection errors, FUJSEN execution errors 2. Debugging techniques - Logging and tracing, interactive debugging 3. Performance troubleshooting - Memory leaks, performance bottlenecks 4. Recovery strategies - Automatic recovery, retry strategies, circuit breakers, graceful degradation 5. Error handling - Comprehensive error handling and recovery mechanisms 6. Monitoring and alerting - Performance monitoring and alerting systems
🚀 Next Steps
1. Implement monitoring - Set up comprehensive monitoring and alerting 2. Create runbooks - Document common issues and their solutions 3. Automate recovery - Implement automatic recovery mechanisms 4. Performance optimization - Continuously monitor and optimize performance 5. Team training - Train your team on troubleshooting procedures
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You now have complete troubleshooting mastery with TuskLang Rust! From common errors to performance issues, from debugging techniques to recovery strategies - TuskLang gives you the tools to diagnose and resolve problems quickly and effectively.