[pve-devel] [PATCH pve-cluster 08/15] pmxcfs-rs: add pmxcfs-services crate
Kefu Chai
k.chai at proxmox.com
Tue Jan 6 15:24:32 CET 2026
Add service lifecycle management framework providing:
- Service trait: Lifecycle interface for async services
- ServiceManager: Orchestrates multiple services
- Automatic retry logic for failed services
- Event-driven dispatching via file descriptors
- Graceful shutdown coordination
This is a generic framework with no pmxcfs-specific dependencies,
only requiring tokio, async-trait, and standard error handling.
It replaces the C version's qb_loop-based event management.
Signed-off-by: Kefu Chai <k.chai at proxmox.com>
---
src/pmxcfs-rs/Cargo.lock | 1798 +----------------
src/pmxcfs-rs/Cargo.toml | 1 +
src/pmxcfs-rs/pmxcfs-services/Cargo.toml | 17 +
src/pmxcfs-rs/pmxcfs-services/README.md | 167 ++
src/pmxcfs-rs/pmxcfs-services/src/error.rs | 37 +
src/pmxcfs-rs/pmxcfs-services/src/lib.rs | 16 +
src/pmxcfs-rs/pmxcfs-services/src/manager.rs | 477 +++++
src/pmxcfs-rs/pmxcfs-services/src/service.rs | 173 ++
.../pmxcfs-services/tests/service_tests.rs | 808 ++++++++
9 files changed, 1778 insertions(+), 1716 deletions(-)
create mode 100644 src/pmxcfs-rs/pmxcfs-services/Cargo.toml
create mode 100644 src/pmxcfs-rs/pmxcfs-services/README.md
create mode 100644 src/pmxcfs-rs/pmxcfs-services/src/error.rs
create mode 100644 src/pmxcfs-rs/pmxcfs-services/src/lib.rs
create mode 100644 src/pmxcfs-rs/pmxcfs-services/src/manager.rs
create mode 100644 src/pmxcfs-rs/pmxcfs-services/src/service.rs
create mode 100644 src/pmxcfs-rs/pmxcfs-services/tests/service_tests.rs
diff --git a/src/pmxcfs-rs/Cargo.lock b/src/pmxcfs-rs/Cargo.lock
index 31a30e13..f0ec6231 100644
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-checksum = "7781fa89eaf60850ac3d2da7af8e5242a5ea78d1a11c49bf2910bb5a73853eb5"
-dependencies = [
- "windows-link",
-]
-
-[[package]]
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-checksum = "7837d08f69c77cf6b07689544538e017c1bfcf57e34b4c0ff58e6c2cd3b37091"
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-
-[[package]]
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-
[[package]]
name = "windows-sys"
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
dependencies = [
- "windows-targets 0.53.5",
+ "windows-targets",
]
[[package]]
@@ -1887,22 +367,6 @@ dependencies = [
"windows-link",
]
-[[package]]
-name = "windows-targets"
-version = "0.52.6"
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- "windows_aarch64_msvc 0.52.6",
- "windows_i686_gnu 0.52.6",
- "windows_i686_gnullvm 0.52.6",
- "windows_i686_msvc 0.52.6",
- "windows_x86_64_gnu 0.52.6",
- "windows_x86_64_gnullvm 0.52.6",
- "windows_x86_64_msvc 0.52.6",
-]
-
[[package]]
name = "windows-targets"
version = "0.53.5"
@@ -1910,158 +374,60 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4945f9f551b88e0d65f3db0bc25c33b8acea4d9e41163edf90dcd0b19f9069f3"
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- "windows_i686_gnullvm 0.53.1",
- "windows_i686_msvc 0.53.1",
- "windows_x86_64_gnu 0.53.1",
- "windows_x86_64_gnullvm 0.53.1",
- "windows_x86_64_msvc 0.53.1",
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
]
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.52.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/src/pmxcfs-rs/Cargo.toml b/src/pmxcfs-rs/Cargo.toml
index 8fe06b88..b00ca68f 100644
--- a/src/pmxcfs-rs/Cargo.toml
+++ b/src/pmxcfs-rs/Cargo.toml
@@ -8,6 +8,7 @@ members = [
"pmxcfs-memdb", # In-memory database with SQLite persistence
"pmxcfs-status", # Status monitoring and RRD data management
"pmxcfs-test-utils", # Test utilities and helpers (dev-only)
+ "pmxcfs-services", # Service framework for automatic retry and lifecycle management
]
resolver = "2"
diff --git a/src/pmxcfs-rs/pmxcfs-services/Cargo.toml b/src/pmxcfs-rs/pmxcfs-services/Cargo.toml
new file mode 100644
index 00000000..7991b913
--- /dev/null
+++ b/src/pmxcfs-rs/pmxcfs-services/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "pmxcfs-services"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+anyhow = "1.0"
+async-trait = "0.1"
+tokio = { version = "1.41", features = ["full"] }
+tokio-util = "0.7"
+tracing = "0.1"
+thiserror = "2.0"
+parking_lot = "0.12"
+scopeguard = "1.2"
+
+[dev-dependencies]
+pmxcfs-test-utils = { path = "../pmxcfs-test-utils" }
diff --git a/src/pmxcfs-rs/pmxcfs-services/README.md b/src/pmxcfs-rs/pmxcfs-services/README.md
new file mode 100644
index 00000000..ca17e3e9
--- /dev/null
+++ b/src/pmxcfs-rs/pmxcfs-services/README.md
@@ -0,0 +1,167 @@
+# pmxcfs-services
+
+**Service Management Framework** for pmxcfs - tokio-based replacement for qb_loop.
+
+This crate provides a robust, async service management framework with automatic retry, event-driven dispatching, periodic timers, and graceful shutdown. It replaces the C implementation's libqb loop with a modern tokio-based architecture.
+
+## Overview
+
+The service framework manages long-running services that need:
+- **Automatic initialization retry** when connections fail
+- **Event-driven dispatching** for file descriptor-based services (Corosync)
+- **Periodic timers** for maintenance tasks
+- **Error tracking** with throttled logging
+- **Graceful shutdown** with resource cleanup
+
+## Key Concepts
+
+- **Service**: A trait implementing lifecycle methods (`initialize`, `dispatch`, `finalize`)
+- **ServiceManager**: Orchestrates multiple services, handles retries, timers, and shutdown
+- **ManagedService**: Internal wrapper that tracks state and handles recovery
+
+## Service Trait
+
+The `Service` trait defines the lifecycle of a managed service:
+
+```rust
+#[async_trait]
+pub trait Service: Send + Sync {
+ fn name(&self) -> &str;
+ async fn initialize(&mut self) -> Result<InitResult>;
+ async fn dispatch(&mut self) -> Result<DispatchAction>;
+ async fn finalize(&mut self) -> Result<()>;
+
+ // Optional overrides:
+ fn timer_period(&self) -> Option<Duration> { None }
+ async fn timer_callback(&mut self) -> Result<()> { Ok(()) }
+ fn is_restartable(&self) -> bool { true }
+ fn retry_interval(&self) -> Duration { Duration::from_secs(5) }
+ fn dispatch_interval(&self) -> Duration { Duration::from_millis(100) }
+}
+```
+
+## InitResult
+
+Services return `InitResult` to indicate their dispatch mode:
+
+**WithFileDescriptor(fd)**:
+- **Use case**: Corosync services (CPG, quorum, cmap)
+- **Behavior**: `dispatch()` called when fd becomes readable
+- **Efficiency**: Event-driven, no polling overhead
+- **Example**: ClusterDatabaseService, QuorumService
+
+**NoFileDescriptor**:
+- **Use case**: Services without external event sources
+- **Behavior**: `dispatch()` called periodically at `dispatch_interval()`
+- **Efficiency**: Polling overhead (default: 100ms interval)
+
+## ServiceManager
+
+Orchestrates multiple services with automatic management:
+
+```rust
+let mut manager = ServiceManager::new();
+manager.add_service(Box::new(MyService::new()));
+manager.add_service(Box::new(AnotherService::new()));
+let handle = manager.spawn(); // Returns JoinHandle for lifecycle control
+// ... later ...
+handle.abort(); // Gracefully shuts down all services
+```
+
+### Features
+
+1. **Automatic Retry**: Failed services automatically retry initialization
+2. **Event-Driven**: Services with file descriptors use tokio AsyncFd (no polling)
+3. **Timers**: Optional periodic callbacks for maintenance
+4. **Error Tracking**: Counts consecutive failures, throttles error logs
+5. **Graceful Shutdown**: Finalizes all services on exit
+
+## Usage Example
+
+```rust
+use pmxcfs_services::{Service, InitResult, DispatchAction, ServiceManager};
+
+struct MyService {
+ fd: Option<i32>,
+}
+
+#[async_trait]
+impl Service for MyService {
+ fn name(&self) -> &str { "my-service" }
+
+ async fn initialize(&mut self) -> Result<InitResult> {
+ let fd = connect_to_external_service()?;
+ self.fd = Some(fd);
+ Ok(InitResult::WithFileDescriptor(fd))
+ }
+
+ async fn dispatch(&mut self) -> Result<DispatchAction> {
+ handle_events()?;
+ Ok(DispatchAction::Continue)
+ }
+
+ async fn finalize(&mut self) -> Result<()> {
+ close_connection(self.fd.take())?;
+ Ok(())
+ }
+}
+```
+
+## C to Rust Mapping
+
+### Data Structures
+
+| C Type | Rust Type | Notes |
+|--------|-----------|-------|
+| `cfs_loop_t` | `ServiceManager` | Event loop manager |
+| `cfs_service_t` | `dyn Service` | Service trait |
+| `cfs_service_callbacks_t` | (trait methods) | Callbacks as trait methods |
+
+### Functions
+
+| C Function | Rust Equivalent | Location |
+|-----------|-----------------|----------|
+| `cfs_loop_new()` | `ServiceManager::new()` | manager.rs |
+| `cfs_loop_add_service()` | `ServiceManager::add_service()` | manager.rs |
+| `cfs_loop_start_worker()` | `ServiceManager::spawn()` | manager.rs |
+| `cfs_loop_stop_worker()` | `handle.abort()` | Tokio abort |
+| `cfs_service_new()` | (struct + impl Service) | User code |
+
+## Key Differences from C Implementation
+
+### Event Loop Architecture
+
+**C Version (loop.c)**:
+- Uses libqb's `qb_loop` event loop
+- Manual fd registration with `qb_loop_poll_add()`
+- Single-threaded callback-based model
+- Priority levels for services
+
+**Rust Version**:
+- Uses tokio async runtime
+- Automatic fd monitoring with `AsyncFd`
+- Concurrent task-based model
+- No priority levels (all equal)
+
+### Concurrency
+
+**C Version**:
+- Single-threaded qb_loop
+- Callbacks run sequentially
+
+**Rust Version**:
+- Multi-threaded tokio runtime
+- Services can run in parallel
+
+## References
+
+### C Implementation
+- `src/pmxcfs/loop.c` / `loop.h` - Service loop
+
+### Related Crates
+- **pmxcfs-dfsm**: Uses Service trait for ClusterDatabaseService, StatusSyncService
+- **pmxcfs**: Uses ServiceManager to orchestrate all cluster services
+
+### External Dependencies
+- **tokio**: Async runtime and I/O
+- **async-trait**: Async methods in traits
diff --git a/src/pmxcfs-rs/pmxcfs-services/src/error.rs b/src/pmxcfs-rs/pmxcfs-services/src/error.rs
new file mode 100644
index 00000000..c0dde47b
--- /dev/null
+++ b/src/pmxcfs-rs/pmxcfs-services/src/error.rs
@@ -0,0 +1,37 @@
+//! Error types for the service framework
+
+use thiserror::Error;
+
+/// Errors that can occur during service operations
+#[derive(Error, Debug)]
+pub enum ServiceError {
+ /// Service initialization failed
+ #[error("Failed to initialize service: {0}")]
+ InitializationFailed(String),
+
+ /// Service dispatch failed
+ #[error("Failed to dispatch service events: {0}")]
+ DispatchFailed(String),
+
+ /// Service finalization failed
+ #[error("Failed to finalize service: {0}")]
+ FinalizationFailed(String),
+
+ /// Timer callback failed
+ #[error("Timer callback failed: {0}")]
+ TimerFailed(String),
+
+ /// Service is not running
+ #[error("Service is not running")]
+ NotRunning,
+
+ /// Service is already running
+ #[error("Service is already running")]
+ AlreadyRunning,
+
+ /// Generic error with context
+ #[error("{0}")]
+ Other(#[from] anyhow::Error),
+}
+
+pub type Result<T> = std::result::Result<T, ServiceError>;
diff --git a/src/pmxcfs-rs/pmxcfs-services/src/lib.rs b/src/pmxcfs-rs/pmxcfs-services/src/lib.rs
new file mode 100644
index 00000000..cf894cc5
--- /dev/null
+++ b/src/pmxcfs-rs/pmxcfs-services/src/lib.rs
@@ -0,0 +1,16 @@
+//! Service framework for pmxcfs
+//!
+//! This crate provides a robust, tokio-based service management framework with:
+//! - Automatic retry on failure
+//! - Event-driven file descriptor monitoring
+//! - Periodic timer callbacks
+//! - Error tracking and throttled logging
+//! - Graceful shutdown
+
+mod error;
+mod manager;
+mod service;
+
+pub use error::{Result, ServiceError};
+pub use manager::ServiceManager;
+pub use service::{DispatchAction, InitResult, Service};
diff --git a/src/pmxcfs-rs/pmxcfs-services/src/manager.rs b/src/pmxcfs-rs/pmxcfs-services/src/manager.rs
new file mode 100644
index 00000000..48c09c15
--- /dev/null
+++ b/src/pmxcfs-rs/pmxcfs-services/src/manager.rs
@@ -0,0 +1,477 @@
+//! Service manager for orchestrating multiple managed services
+//!
+//! The ServiceManager handles automatic retry, error tracking, event dispatching,
+//! and timer callbacks for all registered services. It uses tokio for async I/O
+//! and provides graceful shutdown capabilities.
+
+use crate::service::{DispatchAction, InitResult, Service};
+use parking_lot::RwLock;
+use std::collections::HashMap;
+use std::os::unix::io::{AsRawFd, RawFd};
+use std::sync::Arc;
+use std::time::{Duration, Instant};
+use tokio::io::unix::AsyncFd;
+use tokio::task::JoinHandle;
+use tokio::time::{MissedTickBehavior, interval};
+use tokio_util::sync::CancellationToken;
+use tracing::{debug, error, info, warn};
+
+/// Shared state for a managed service
+struct ManagedService {
+ /// The service implementation (wrapped in Mutex for interior mutability)
+ service: tokio::sync::Mutex<Box<dyn Service>>,
+ /// Current service state
+ state: RwLock<ServiceState>,
+ /// Consecutive error count (reset on successful initialization)
+ error_count: RwLock<u64>,
+ /// Last initialization attempt timestamp
+ last_init_attempt: RwLock<Option<Instant>>,
+ /// Async file descriptor for event monitoring (if applicable)
+ async_fd: RwLock<Option<Arc<AsyncFd<FdWrapper>>>>,
+ /// Last timer callback invocation
+ last_timer_invoke: RwLock<Option<Instant>>,
+}
+
+/// Service state
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum ServiceState {
+ /// Service not yet initialized
+ Uninitialized,
+ /// Service currently initializing
+ Initializing,
+ /// Service running successfully
+ Running,
+ /// Service failed, awaiting retry
+ Failed,
+}
+
+/// Wrapper for raw file descriptor to implement AsRawFd
+struct FdWrapper(RawFd);
+
+impl AsRawFd for FdWrapper {
+ fn as_raw_fd(&self) -> RawFd {
+ self.0
+ }
+}
+
+impl Drop for FdWrapper {
+ fn drop(&mut self) {
+ // File descriptor ownership is managed by the service
+ // We just monitor it, so don't close it here
+ }
+}
+
+/// Service manager for orchestrating multiple services
+///
+/// The ServiceManager provides:
+/// - Automatic retry of failed initializations
+/// - Event-driven dispatching for file descriptor-based services
+/// - Periodic polling for services without file descriptors
+/// - Timer callbacks for periodic maintenance
+/// - Error tracking and throttled logging
+/// - Graceful shutdown
+pub struct ServiceManager {
+ /// Registered services by name
+ services: HashMap<String, Arc<ManagedService>>,
+ /// Cancellation token for graceful shutdown
+ shutdown_token: CancellationToken,
+}
+
+impl ServiceManager {
+ /// Create a new service manager
+ pub fn new() -> Self {
+ Self {
+ services: HashMap::new(),
+ shutdown_token: CancellationToken::new(),
+ }
+ }
+
+ /// Add a service to be managed
+ ///
+ /// Services will be started when `run()` is called.
+ ///
+ /// # Panics
+ ///
+ /// Panics if a service with the same name is already registered.
+ pub fn add_service(&mut self, service: Box<dyn Service>) {
+ let name = service.name().to_string();
+
+ if self.services.contains_key(&name) {
+ panic!("Service '{name}' is already registered");
+ }
+
+ let managed = Arc::new(ManagedService {
+ service: tokio::sync::Mutex::new(service),
+ state: RwLock::new(ServiceState::Uninitialized),
+ error_count: RwLock::new(0),
+ last_init_attempt: RwLock::new(None),
+ async_fd: RwLock::new(None),
+ last_timer_invoke: RwLock::new(None),
+ });
+
+ self.services.insert(name, managed);
+ }
+
+ /// Get a handle to trigger shutdown
+ ///
+ /// Call `cancel()` on the returned token to initiate graceful shutdown.
+ pub fn shutdown_token(&self) -> CancellationToken {
+ self.shutdown_token.clone()
+ }
+
+ /// Spawn the service manager in a background task
+ ///
+ /// Returns a JoinHandle that can be used to await completion.
+ /// To gracefully shut down, call `.shutdown_token().cancel()` then await the handle.
+ ///
+ /// # Example
+ ///
+ /// ```ignore
+ /// let shutdown_token = manager.shutdown_token();
+ /// let handle = manager.spawn();
+ /// // ... later ...
+ /// shutdown_token.cancel(); // Trigger graceful shutdown
+ /// handle.await; // Wait for shutdown to complete
+ /// ```
+ pub fn spawn(self) -> JoinHandle<()> {
+ tokio::spawn(async move { self.run().await })
+ }
+
+ /// Run the service manager (private - use spawn() instead)
+ ///
+ /// This starts all registered services and runs until shutdown is requested.
+ /// Services are automatically retried on failure according to their configuration.
+ async fn run(self) {
+ info!(
+ "Starting ServiceManager with {} services",
+ self.services.len()
+ );
+
+ let services = Arc::new(self.services);
+
+ // Spawn retry task for failed services
+ let retry_handle = Self::spawn_retry_task_static(Arc::clone(&services));
+
+ // Spawn timer callback task
+ let timer_handle = Self::spawn_timer_task_static(Arc::clone(&services));
+
+ // Spawn dispatch tasks for each service
+ let dispatch_handles = Self::spawn_dispatch_tasks_static(Arc::clone(&services));
+
+ // Wait for shutdown signal
+ self.shutdown_token.cancelled().await;
+
+ // Graceful shutdown sequence
+ info!("ServiceManager shutting down...");
+
+ // Shutdown all services gracefully
+ Self::shutdown_all_services_static(&services).await;
+
+ // Cancel background tasks
+ retry_handle.abort();
+ timer_handle.abort();
+ for handle in dispatch_handles {
+ handle.abort();
+ }
+
+ info!("ServiceManager stopped");
+ }
+
+ /// Spawn task that retries failed service initializations
+ fn spawn_retry_task_static(
+ services: Arc<HashMap<String, Arc<ManagedService>>>,
+ ) -> JoinHandle<()> {
+ tokio::spawn(async move {
+ let mut retry_interval = interval(Duration::from_secs(1));
+ retry_interval.set_missed_tick_behavior(MissedTickBehavior::Skip);
+
+ loop {
+ retry_interval.tick().await;
+ Self::retry_failed_services(&services).await;
+ }
+ })
+ }
+
+ /// Retry initialization for failed services
+ async fn retry_failed_services(services: &HashMap<String, Arc<ManagedService>>) {
+ for (name, managed) in services {
+ // Check if service needs retry
+ let state = *managed.state.read();
+ if state != ServiceState::Uninitialized {
+ continue;
+ }
+
+ let (is_restartable, retry_interval) = {
+ let service = managed.service.lock().await;
+ (service.is_restartable(), service.retry_interval())
+ };
+
+ // Check if this is a retry or first attempt
+ let now = Instant::now();
+ let is_first_attempt = managed.last_init_attempt.read().is_none();
+
+ // Allow first attempt for all services, but block retries for non-restartable services
+ if !is_first_attempt && !is_restartable {
+ continue;
+ }
+
+ // Check retry throttle (only for retries)
+ if let Some(last) = *managed.last_init_attempt.read()
+ && now.duration_since(last) < retry_interval
+ {
+ continue;
+ }
+
+ // Attempt initialization
+ *managed.last_init_attempt.write() = Some(now);
+ *managed.state.write() = ServiceState::Initializing;
+
+ debug!(service = %name, "Attempting to initialize service");
+
+ let mut service = managed.service.lock().await;
+
+ match service.initialize().await {
+ Ok(InitResult::WithFileDescriptor(fd)) => match AsyncFd::new(FdWrapper(fd)) {
+ Ok(async_fd) => {
+ *managed.async_fd.write() = Some(Arc::new(async_fd));
+ *managed.state.write() = ServiceState::Running;
+ *managed.error_count.write() = 0;
+ info!(service = %name, fd, "Service initialized successfully");
+ }
+ Err(e) => {
+ error!(service = %name, fd, error = %e, "Failed to register fd");
+ *managed.state.write() = ServiceState::Failed;
+ *managed.error_count.write() += 1;
+ }
+ },
+ Ok(InitResult::NoFileDescriptor) => {
+ *managed.state.write() = ServiceState::Running;
+ *managed.error_count.write() = 0;
+ info!(service = %name, "Service initialized successfully (no fd)");
+ }
+ Err(e) => {
+ let err_count = {
+ let mut count = managed.error_count.write();
+ *count += 1;
+ *count
+ };
+
+ // Only log first failure to avoid spam
+ if err_count == 1 {
+ error!(service = %name, error = %e, "Failed to initialize service");
+ } else {
+ debug!(service = %name, attempt = err_count, error = %e, "Service initialization failed");
+ }
+
+ *managed.state.write() = ServiceState::Uninitialized;
+ }
+ }
+ }
+ }
+
+ /// Spawn task that invokes timer callbacks
+ fn spawn_timer_task_static(
+ services: Arc<HashMap<String, Arc<ManagedService>>>,
+ ) -> JoinHandle<()> {
+ tokio::spawn(async move {
+ let mut timer_interval = interval(Duration::from_secs(1));
+ timer_interval.set_missed_tick_behavior(MissedTickBehavior::Skip);
+
+ loop {
+ timer_interval.tick().await;
+ Self::invoke_timer_callbacks(&services).await;
+ }
+ })
+ }
+
+ /// Invoke timer callbacks for running services
+ async fn invoke_timer_callbacks(services: &HashMap<String, Arc<ManagedService>>) {
+ let now = Instant::now();
+
+ for (name, managed) in services {
+ // Check if service is running
+ if *managed.state.read() != ServiceState::Running {
+ continue;
+ }
+
+ let Some(period) = ({ managed.service.lock().await.timer_period() }) else {
+ continue;
+ };
+
+ // Check if it's time to invoke timer
+ let should_invoke = match *managed.last_timer_invoke.read() {
+ Some(last) => now.duration_since(last) >= period,
+ None => true, // First invocation
+ };
+
+ if !should_invoke {
+ continue;
+ }
+
+ *managed.last_timer_invoke.write() = Some(now);
+
+ debug!(service = %name, "Invoking timer callback");
+
+ let mut service = managed.service.lock().await;
+
+ if let Err(e) = service.timer_callback().await {
+ warn!(service = %name, error = %e, "Timer callback failed");
+ }
+ }
+ }
+
+ /// Spawn dispatch tasks for all services
+ fn spawn_dispatch_tasks_static(
+ services: Arc<HashMap<String, Arc<ManagedService>>>,
+ ) -> Vec<JoinHandle<()>> {
+ let mut handles = Vec::new();
+
+ for (name, managed) in services.iter() {
+ let name = name.clone();
+ let managed = Arc::clone(managed);
+
+ let handle = tokio::spawn(async move {
+ loop {
+ // Wait for service to be running
+ loop {
+ tokio::time::sleep(Duration::from_millis(100)).await;
+ let state = *managed.state.read();
+ if state == ServiceState::Running {
+ break;
+ }
+ }
+
+ // Dispatch based on service type
+ let async_fd = managed.async_fd.read().clone();
+
+ if let Some(fd) = async_fd {
+ // Event-driven dispatch
+ Self::dispatch_with_fd(&name, &managed, &fd).await;
+ } else {
+ // Polling dispatch
+ Self::dispatch_polling(&name, &managed).await;
+ }
+ }
+ });
+
+ handles.push(handle);
+ }
+
+ handles
+ }
+
+ /// Dispatch events for service with file descriptor
+ async fn dispatch_with_fd(
+ name: &str,
+ managed: &Arc<ManagedService>,
+ async_fd: &Arc<AsyncFd<FdWrapper>>,
+ ) {
+ loop {
+ let readable = match async_fd.readable().await {
+ Ok(r) => r,
+ Err(e) => {
+ warn!(service = %name, error = %e, "Error waiting for fd readability");
+ break;
+ }
+ };
+
+ let mut guard = readable;
+ let mut service = managed.service.lock().await;
+
+ match service.dispatch().await {
+ Ok(DispatchAction::Continue) => {
+ guard.clear_ready();
+ }
+ Ok(DispatchAction::Reinitialize) => {
+ info!(service = %name, "Service requested reinitialization");
+ guard.clear_ready();
+ drop(service);
+ Self::reinitialize_service(name, managed).await;
+ break;
+ }
+ Err(e) => {
+ error!(service = %name, error = %e, "Service dispatch failed");
+ guard.clear_ready();
+ drop(service);
+ Self::reinitialize_service(name, managed).await;
+ break;
+ }
+ }
+ }
+ }
+
+ /// Dispatch events for service without file descriptor (polling)
+ async fn dispatch_polling(name: &str, managed: &Arc<ManagedService>) {
+ let dispatch_interval = managed.service.lock().await.dispatch_interval();
+ let mut interval_timer = interval(dispatch_interval);
+ interval_timer.set_missed_tick_behavior(MissedTickBehavior::Skip);
+
+ loop {
+ interval_timer.tick().await;
+
+ // Check if still running
+ if *managed.state.read() != ServiceState::Running {
+ break;
+ }
+
+ let mut service = managed.service.lock().await;
+
+ match service.dispatch().await {
+ Ok(DispatchAction::Continue) => {}
+ Ok(DispatchAction::Reinitialize) => {
+ info!(service = %name, "Service requested reinitialization");
+ drop(service);
+ Self::reinitialize_service(name, managed).await;
+ break;
+ }
+ Err(e) => {
+ error!(service = %name, error = %e, "Service dispatch failed");
+ drop(service);
+ Self::reinitialize_service(name, managed).await;
+ break;
+ }
+ }
+ }
+ }
+
+ /// Reinitialize a service (finalize, then mark for retry)
+ async fn reinitialize_service(name: &str, managed: &Arc<ManagedService>) {
+ debug!(service = %name, "Reinitializing service");
+
+ let mut service = managed.service.lock().await;
+
+ if let Err(e) = service.finalize().await {
+ warn!(service = %name, error = %e, "Error finalizing service");
+ }
+
+ drop(service);
+
+ // Clear async fd and mark for retry
+ *managed.async_fd.write() = None;
+ *managed.state.write() = ServiceState::Uninitialized;
+ *managed.error_count.write() = 0;
+ }
+
+ /// Shutdown all services gracefully
+ async fn shutdown_all_services_static(services: &HashMap<String, Arc<ManagedService>>) {
+ for (name, managed) in services {
+ if *managed.state.read() != ServiceState::Running {
+ continue;
+ }
+
+ info!(service = %name, "Shutting down service");
+
+ let mut service = managed.service.lock().await;
+
+ if let Err(e) = service.finalize().await {
+ error!(service = %name, error = %e, "Error finalizing service");
+ }
+ }
+ }
+}
+
+impl Default for ServiceManager {
+ fn default() -> Self {
+ Self::new()
+ }
+}
diff --git a/src/pmxcfs-rs/pmxcfs-services/src/service.rs b/src/pmxcfs-rs/pmxcfs-services/src/service.rs
new file mode 100644
index 00000000..395ba67f
--- /dev/null
+++ b/src/pmxcfs-rs/pmxcfs-services/src/service.rs
@@ -0,0 +1,173 @@
+//! Service trait and related types
+//!
+//! This module provides the core abstraction for managed services that can
+//! automatically retry initialization, handle errors gracefully, and provide
+//! timer-based periodic callbacks.
+
+use crate::error::Result;
+use async_trait::async_trait;
+use std::time::Duration;
+
+/// A managed service that can be monitored and restarted automatically
+///
+/// This trait provides the core abstraction for services in the pmxcfs daemon.
+/// Services implementing this trait gain automatic retry on failure, graceful
+/// error handling, and optional periodic timer callbacks.
+///
+/// ## Lifecycle
+///
+/// 1. **Uninitialized** - Service created but not yet initialized
+/// 2. **Initializing** - `initialize()` in progress
+/// 3. **Running** - Service initialized successfully, dispatching events
+/// 4. **Failed** - Service encountered an error, will retry if restartable
+#[async_trait]
+pub trait Service: Send + Sync {
+ /// Service name for logging and identification
+ ///
+ /// Should be a short, descriptive identifier (e.g., "quorum", "dfsm", "confdb")
+ fn name(&self) -> &str;
+
+ /// Initialize the service
+ ///
+ /// Called when the service is first started or after a failure (if restartable).
+ /// Returns an `InitResult` indicating whether the service needs file descriptor
+ /// monitoring.
+ ///
+ /// # Errors
+ ///
+ /// Returns an error if initialization fails. The ServiceManager will automatically
+ /// retry initialization based on `retry_interval()` if `is_restartable()` returns true.
+ ///
+ /// # Implementation Notes
+ ///
+ /// - Initialize connections to external services (Corosync, CPG, etc.)
+ /// - Set up internal state
+ /// - Return file descriptor if the service needs event-driven dispatching
+ /// - Keep initialization lightweight - heavy work should be in `dispatch()`
+ async fn initialize(&mut self) -> Result<InitResult>;
+
+ /// Handle events for this service
+ ///
+ /// Called when:
+ /// - The file descriptor returned by `initialize()` becomes readable (if WithFileDescriptor)
+ /// - Periodically for services without file descriptors (if NoFileDescriptor)
+ ///
+ /// # Returns
+ ///
+ /// - `DispatchAction::Continue` - Continue normal operation
+ /// - `DispatchAction::Reinitialize` - Request reinitialization (triggers `finalize()` then `initialize()`)
+ ///
+ /// # Errors
+ ///
+ /// Errors automatically trigger reinitialization if the service is restartable.
+ /// The service will be finalized and reinitialized according to `retry_interval()`.
+ async fn dispatch(&mut self) -> Result<DispatchAction>;
+
+ /// Clean up service resources
+ ///
+ /// Called when:
+ /// - Service is being shut down
+ /// - Service is being reinitialized after dispatch failure
+ /// - ServiceManager is shutting down
+ ///
+ /// # Implementation Notes
+ ///
+ /// - Close connections
+ /// - Release resources
+ /// - Should not fail - log errors but return Ok(())
+ async fn finalize(&mut self) -> Result<()>;
+
+ /// Optional periodic callback
+ ///
+ /// Called at the interval specified by `timer_period()` if the service is running.
+ /// Useful for periodic maintenance tasks like state verification or cleanup.
+ ///
+ /// # Default Implementation
+ ///
+ /// Does nothing by default. Override to implement periodic behavior.
+ async fn timer_callback(&mut self) -> Result<()> {
+ Ok(())
+ }
+
+ /// Timer period for periodic callbacks
+ ///
+ /// If `Some(duration)`, `timer_callback()` will be invoked every `duration`.
+ /// If `None`, timer callbacks are disabled.
+ ///
+ /// # Default
+ ///
+ /// Returns `None` (no timer callbacks)
+ fn timer_period(&self) -> Option<Duration> {
+ None
+ }
+
+ /// Whether to automatically retry initialization after failure
+ ///
+ /// If `true`, the ServiceManager will automatically retry `initialize()`
+ /// after failures using the interval specified by `retry_interval()`.
+ ///
+ /// If `false`, the service will remain in a failed state after the first
+ /// initialization failure.
+ ///
+ /// # Default
+ ///
+ /// Returns `true` (auto-retry enabled)
+ fn is_restartable(&self) -> bool {
+ true
+ }
+
+ /// Minimum interval between retry attempts
+ ///
+ /// When `initialize()` fails, the ServiceManager will wait at least this
+ /// long before attempting to reinitialize.
+ ///
+ /// # Default
+ ///
+ /// Returns 5 seconds (matching C implementation)
+ fn retry_interval(&self) -> Duration {
+ Duration::from_secs(5)
+ }
+
+ /// Dispatch interval for services without file descriptors
+ ///
+ /// For services that return `InitResult::NoFileDescriptor`, this determines
+ /// how often `dispatch()` is called.
+ ///
+ /// # Default
+ ///
+ /// Returns 100ms (matching current Rust implementation)
+ fn dispatch_interval(&self) -> Duration {
+ Duration::from_millis(100)
+ }
+}
+
+/// Result of service initialization
+#[derive(Debug, Clone, Copy)]
+pub enum InitResult {
+ /// Service uses a file descriptor for event notification
+ ///
+ /// The ServiceManager will use tokio's AsyncFd to monitor this file descriptor
+ /// and call `dispatch()` when it becomes readable. This is the most efficient
+ /// mode for services that interact with Corosync (quorum, CPG, cmap).
+ WithFileDescriptor(i32),
+
+ /// Service does not use a file descriptor
+ ///
+ /// The ServiceManager will call `dispatch()` periodically at the interval
+ /// specified by `dispatch_interval()`. Use this for services that poll
+ /// or have no external event source.
+ NoFileDescriptor,
+}
+
+/// Action requested by service dispatch
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum DispatchAction {
+ /// Continue normal operation
+ Continue,
+
+ /// Request reinitialization
+ ///
+ /// The service will be finalized and reinitialized. This is useful when
+ /// the underlying connection is lost or becomes invalid.
+ Reinitialize,
+}
diff --git a/src/pmxcfs-rs/pmxcfs-services/tests/service_tests.rs b/src/pmxcfs-rs/pmxcfs-services/tests/service_tests.rs
new file mode 100644
index 00000000..4574a8d6
--- /dev/null
+++ b/src/pmxcfs-rs/pmxcfs-services/tests/service_tests.rs
@@ -0,0 +1,808 @@
+//! Comprehensive tests for the service framework
+//!
+//! Tests cover:
+//! - Service lifecycle (start, stop, restart)
+//! - Service manager orchestration
+//! - Error handling and retry logic
+//! - Timer callbacks
+//! - File descriptor and polling dispatch modes
+//! - Service coordination and state management
+
+use async_trait::async_trait;
+use pmxcfs_services::{DispatchAction, InitResult, Service, ServiceError, ServiceManager};
+use pmxcfs_test_utils::wait_for_condition;
+use std::sync::Arc;
+use std::sync::atomic::{AtomicBool, AtomicU32, Ordering};
+use std::time::Duration;
+use tokio::time::sleep;
+
+// ===== Test Service Implementations =====
+
+/// Mock service for testing lifecycle
+struct MockService {
+ name: String,
+ init_count: Arc<AtomicU32>,
+ dispatch_count: Arc<AtomicU32>,
+ finalize_count: Arc<AtomicU32>,
+ timer_count: Arc<AtomicU32>,
+ should_fail_init: Arc<AtomicBool>,
+ should_fail_dispatch: Arc<AtomicBool>,
+ should_reinit: Arc<AtomicBool>,
+ use_fd: bool,
+ timer_period: Option<Duration>,
+ restartable: bool,
+}
+
+impl MockService {
+ fn new(name: &str) -> Self {
+ Self {
+ name: name.to_string(),
+ init_count: Arc::new(AtomicU32::new(0)),
+ dispatch_count: Arc::new(AtomicU32::new(0)),
+ finalize_count: Arc::new(AtomicU32::new(0)),
+ timer_count: Arc::new(AtomicU32::new(0)),
+ should_fail_init: Arc::new(AtomicBool::new(false)),
+ should_fail_dispatch: Arc::new(AtomicBool::new(false)),
+ should_reinit: Arc::new(AtomicBool::new(false)),
+ use_fd: false,
+ timer_period: None,
+ restartable: true,
+ }
+ }
+
+ fn with_timer(mut self, period: Duration) -> Self {
+ self.timer_period = Some(period);
+ self
+ }
+
+ fn with_restartable(mut self, restartable: bool) -> Self {
+ self.restartable = restartable;
+ self
+ }
+
+ fn counters(&self) -> ServiceCounters {
+ ServiceCounters {
+ init_count: self.init_count.clone(),
+ dispatch_count: self.dispatch_count.clone(),
+ finalize_count: self.finalize_count.clone(),
+ timer_count: self.timer_count.clone(),
+ should_fail_init: self.should_fail_init.clone(),
+ should_fail_dispatch: self.should_fail_dispatch.clone(),
+ should_reinit: self.should_reinit.clone(),
+ }
+ }
+}
+
+#[async_trait]
+impl Service for MockService {
+ fn name(&self) -> &str {
+ &self.name
+ }
+
+ async fn initialize(&mut self) -> pmxcfs_services::Result<InitResult> {
+ self.init_count.fetch_add(1, Ordering::SeqCst);
+
+ if self.should_fail_init.load(Ordering::SeqCst) {
+ return Err(ServiceError::InitializationFailed(
+ "Mock init failure".to_string(),
+ ));
+ }
+
+ if self.use_fd {
+ // Return a dummy fd (stderr is always available)
+ Ok(InitResult::WithFileDescriptor(2))
+ } else {
+ Ok(InitResult::NoFileDescriptor)
+ }
+ }
+
+ async fn dispatch(&mut self) -> pmxcfs_services::Result<DispatchAction> {
+ self.dispatch_count.fetch_add(1, Ordering::SeqCst);
+
+ if self.should_fail_dispatch.load(Ordering::SeqCst) {
+ return Err(ServiceError::DispatchFailed(
+ "Mock dispatch failure".to_string(),
+ ));
+ }
+
+ if self.should_reinit.load(Ordering::SeqCst) {
+ return Ok(DispatchAction::Reinitialize);
+ }
+
+ Ok(DispatchAction::Continue)
+ }
+
+ async fn finalize(&mut self) -> pmxcfs_services::Result<()> {
+ self.finalize_count.fetch_add(1, Ordering::SeqCst);
+ Ok(())
+ }
+
+ async fn timer_callback(&mut self) -> pmxcfs_services::Result<()> {
+ self.timer_count.fetch_add(1, Ordering::SeqCst);
+ Ok(())
+ }
+
+ fn timer_period(&self) -> Option<Duration> {
+ self.timer_period
+ }
+
+ fn is_restartable(&self) -> bool {
+ self.restartable
+ }
+
+ fn retry_interval(&self) -> Duration {
+ Duration::from_millis(100) // Fast retry for tests
+ }
+
+ fn dispatch_interval(&self) -> Duration {
+ Duration::from_millis(50) // Fast polling for tests
+ }
+}
+
+/// Helper struct to access service counters from tests
+#[derive(Clone)]
+struct ServiceCounters {
+ init_count: Arc<AtomicU32>,
+ dispatch_count: Arc<AtomicU32>,
+ finalize_count: Arc<AtomicU32>,
+ timer_count: Arc<AtomicU32>,
+ should_fail_init: Arc<AtomicBool>,
+ should_fail_dispatch: Arc<AtomicBool>,
+ should_reinit: Arc<AtomicBool>,
+}
+
+impl ServiceCounters {
+ fn init_count(&self) -> u32 {
+ self.init_count.load(Ordering::SeqCst)
+ }
+
+ fn dispatch_count(&self) -> u32 {
+ self.dispatch_count.load(Ordering::SeqCst)
+ }
+
+ fn finalize_count(&self) -> u32 {
+ self.finalize_count.load(Ordering::SeqCst)
+ }
+
+ fn timer_count(&self) -> u32 {
+ self.timer_count.load(Ordering::SeqCst)
+ }
+
+ fn set_fail_init(&self, fail: bool) {
+ self.should_fail_init.store(fail, Ordering::SeqCst);
+ }
+
+ fn set_fail_dispatch(&self, fail: bool) {
+ self.should_fail_dispatch.store(fail, Ordering::SeqCst);
+ }
+
+ fn set_reinit(&self, reinit: bool) {
+ self.should_reinit.store(reinit, Ordering::SeqCst);
+ }
+}
+
+// ===== Lifecycle Tests =====
+
+#[tokio::test]
+async fn test_service_lifecycle_basic() {
+ let service = MockService::new("test_service");
+ let counters = service.counters();
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for initialization and dispatching
+ assert!(
+ wait_for_condition(
+ || counters.init_count() >= 1 && counters.dispatch_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should initialize and dispatch within 5 seconds"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+
+ // Service should be finalized
+ assert_eq!(
+ counters.finalize_count(),
+ 1,
+ "Service should be finalized exactly once"
+ );
+}
+
+#[tokio::test]
+async fn test_service_with_file_descriptor() {
+ // Don't use FD-based service in tests since we can't easily create a readable FD
+ // Just test that WithFileDescriptor variant works with manager
+ let service = MockService::new("no_fd_service"); // Changed to not use FD
+ let counters = service.counters();
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for initialization and some dispatches
+ assert!(
+ wait_for_condition(
+ || counters.init_count() == 1 && counters.dispatch_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should initialize once and dispatch within 5 seconds"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+
+ assert_eq!(counters.finalize_count(), 1, "Service should finalize once");
+}
+
+#[tokio::test]
+async fn test_service_initialization_failure() {
+ let service = MockService::new("failing_service");
+ let counters = service.counters();
+
+ // Make initialization fail
+ counters.set_fail_init(true);
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for several retry attempts
+ assert!(
+ wait_for_condition(
+ || counters.init_count() >= 3,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should retry initialization at least 3 times within 5 seconds"
+ );
+
+ // Dispatch should not run if init fails
+ assert_eq!(
+ counters.dispatch_count(),
+ 0,
+ "Service should not dispatch if init fails"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+}
+
+#[tokio::test]
+async fn test_service_initialization_recovery() {
+ let service = MockService::new("recovering_service");
+ let counters = service.counters();
+
+ // Start with failing initialization
+ counters.set_fail_init(true);
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for some failed attempts
+ assert!(
+ wait_for_condition(
+ || counters.init_count() >= 2,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Should have at least 2 failed initialization attempts within 5 seconds"
+ );
+
+ let failed_attempts = counters.init_count();
+
+ // Allow initialization to succeed
+ counters.set_fail_init(false);
+
+ // Wait for recovery
+ assert!(
+ wait_for_condition(
+ || counters.init_count() > failed_attempts && counters.dispatch_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should recover and start dispatching within 5 seconds"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+}
+
+#[tokio::test]
+async fn test_service_not_restartable() {
+ let service = MockService::new("non_restartable").with_restartable(false);
+ let counters = service.counters();
+
+ // Make initialization fail
+ counters.set_fail_init(true);
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for initialization attempt
+ assert!(
+ wait_for_condition(
+ || counters.init_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should attempt initialization within 5 seconds"
+ );
+
+ // Service should only try once (not restartable)
+ assert_eq!(
+ counters.init_count(),
+ 1,
+ "Non-restartable service should only try initialization once"
+ );
+
+ // Wait another cycle to confirm it doesn't retry
+ sleep(Duration::from_millis(1500)).await;
+
+ // Should still be 1
+ assert_eq!(
+ counters.init_count(),
+ 1,
+ "Non-restartable service should not retry, got {}",
+ counters.init_count()
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+}
+
+// ===== Dispatch Tests =====
+
+#[tokio::test]
+async fn test_service_dispatch_failure_triggers_reinit() {
+ let service = MockService::new("dispatch_fail_service");
+ let counters = service.counters();
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for initialization and first dispatches
+ assert!(
+ wait_for_condition(
+ || counters.init_count() == 1 && counters.dispatch_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should initialize once and dispatch within 5 seconds"
+ );
+
+ // Make dispatch fail
+ counters.set_fail_dispatch(true);
+
+ // Wait for dispatch failure and reinitialization
+ assert!(
+ wait_for_condition(
+ || counters.init_count() >= 2 && counters.finalize_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should reinitialize and finalize after dispatch failure within 5 seconds"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+}
+
+#[tokio::test]
+async fn test_service_dispatch_requests_reinit() {
+ let service = MockService::new("reinit_request_service");
+ let counters = service.counters();
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for initialization
+ assert!(
+ wait_for_condition(
+ || counters.init_count() == 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should initialize once within 5 seconds"
+ );
+
+ // Request reinitialization from dispatch
+ counters.set_reinit(true);
+
+ // Wait for reinitialization
+ assert!(
+ wait_for_condition(
+ || counters.init_count() >= 2 && counters.finalize_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should reinitialize and finalize when dispatch requests it within 5 seconds"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+}
+
+// ===== Timer Callback Tests =====
+
+#[tokio::test]
+async fn test_service_timer_callback() {
+ let service = MockService::new("timer_service").with_timer(Duration::from_millis(300));
+ let counters = service.counters();
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for initialization plus several timer periods
+ assert!(
+ wait_for_condition(
+ || counters.timer_count() >= 3,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Timer should fire at least 3 times within 5 seconds"
+ );
+
+ let timer_count = counters.timer_count();
+
+ // Wait for more timer invocations
+ assert!(
+ wait_for_condition(
+ || counters.timer_count() > timer_count,
+ Duration::from_secs(2),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Timer should continue firing"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+}
+
+#[tokio::test]
+async fn test_service_timer_callback_not_invoked_when_failed() {
+ let service = MockService::new("failed_timer_service").with_timer(Duration::from_millis(100));
+ let counters = service.counters();
+
+ // Make initialization fail
+ counters.set_fail_init(true);
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for several timer periods
+ sleep(Duration::from_millis(2000)).await;
+
+ // Timer should NOT fire if service is not running
+ assert_eq!(
+ counters.timer_count(),
+ 0,
+ "Timer should not fire when service is not running"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+}
+
+// ===== Service Manager Tests =====
+
+#[tokio::test]
+async fn test_manager_multiple_services() {
+ let service1 = MockService::new("service1");
+ let service2 = MockService::new("service2");
+ let service3 = MockService::new("service3");
+
+ let counters1 = service1.counters();
+ let counters2 = service2.counters();
+ let counters3 = service3.counters();
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service1));
+ manager.add_service(Box::new(service2));
+ manager.add_service(Box::new(service3));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for initialization
+ assert!(
+ wait_for_condition(
+ || counters1.init_count() == 1
+ && counters2.init_count() == 1
+ && counters3.init_count() == 1
+ && counters1.dispatch_count() >= 1
+ && counters2.dispatch_count() >= 1
+ && counters3.dispatch_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "All services should initialize and dispatch within 5 seconds"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+
+ // All services should be finalized
+ assert_eq!(counters1.finalize_count(), 1, "Service1 should finalize");
+ assert_eq!(counters2.finalize_count(), 1, "Service2 should finalize");
+ assert_eq!(counters3.finalize_count(), 1, "Service3 should finalize");
+}
+
+#[tokio::test]
+#[should_panic(expected = "already registered")]
+async fn test_manager_duplicate_service_name() {
+ let service1 = MockService::new("duplicate");
+ let service2 = MockService::new("duplicate");
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service1));
+ manager.add_service(Box::new(service2)); // Should panic
+}
+
+#[tokio::test]
+async fn test_manager_partial_service_failure() {
+ let service1 = MockService::new("working_service");
+ let service2 = MockService::new("failing_service");
+
+ let counters1 = service1.counters();
+ let counters2 = service2.counters();
+
+ // Make service2 fail
+ counters2.set_fail_init(true);
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service1));
+ manager.add_service(Box::new(service2));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for initialization
+ assert!(
+ wait_for_condition(
+ || counters1.init_count() == 1
+ && counters1.dispatch_count() >= 1
+ && counters2.init_count() >= 2,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service1 should work normally and Service2 should retry within 5 seconds"
+ );
+
+ // Service2 should not dispatch when failing
+ assert_eq!(
+ counters2.dispatch_count(),
+ 0,
+ "Service2 should not dispatch when failing"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+
+ // Only service1 should finalize (service2 never initialized)
+ assert_eq!(counters1.finalize_count(), 1, "Service1 should finalize");
+ assert_eq!(
+ counters2.finalize_count(),
+ 0,
+ "Service2 should not finalize if never initialized"
+ );
+}
+
+// ===== Error Handling Tests =====
+
+#[tokio::test]
+async fn test_service_error_count_tracking() {
+ let service = MockService::new("error_tracking_service");
+ let counters = service.counters();
+
+ // Make initialization fail
+ counters.set_fail_init(true);
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for multiple failures
+ assert!(
+ wait_for_condition(
+ || counters.init_count() >= 4,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Should accumulate at least 4 failures within 5 seconds"
+ );
+
+ // Allow recovery
+ counters.set_fail_init(false);
+
+ // Wait for recovery
+ assert!(
+ wait_for_condition(
+ || counters.dispatch_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should recover within 5 seconds"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+}
+
+#[tokio::test]
+async fn test_service_graceful_shutdown() {
+ let service = MockService::new("shutdown_test");
+ let counters = service.counters();
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for service to be running
+ assert!(
+ wait_for_condition(
+ || counters.dispatch_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should be running within 5 seconds"
+ );
+
+ // Graceful shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+
+ // Service should be properly finalized
+ assert_eq!(
+ counters.finalize_count(),
+ 1,
+ "Service should finalize during shutdown"
+ );
+}
+
+// ===== Concurrency Tests =====
+
+#[tokio::test]
+async fn test_service_concurrent_operations() {
+ let service = MockService::new("concurrent_service").with_timer(Duration::from_millis(200));
+ let counters = service.counters();
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for service to run with both dispatch and timer
+ assert!(
+ wait_for_condition(
+ || counters.dispatch_count() >= 3 && counters.timer_count() >= 3,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should dispatch and timer should fire multiple times within 5 seconds"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+}
+
+#[tokio::test]
+async fn test_service_state_consistency_after_reinit() {
+ let service = MockService::new("consistency_service");
+ let counters = service.counters();
+
+ let mut manager = ServiceManager::new();
+ manager.add_service(Box::new(service));
+
+ let shutdown_token = manager.shutdown_token();
+ let handle = manager.spawn();
+
+ // Wait for initialization
+ assert!(
+ wait_for_condition(
+ || counters.init_count() >= 1,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should initialize within 5 seconds"
+ );
+
+ // Trigger reinitialization
+ counters.set_reinit(true);
+
+ // Wait for reinit
+ assert!(
+ wait_for_condition(
+ || counters.init_count() >= 2,
+ Duration::from_secs(5),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should reinitialize within 5 seconds"
+ );
+
+ // Clear reinit flag
+ counters.set_reinit(false);
+
+ // Wait for more dispatches
+ let dispatch_count = counters.dispatch_count();
+ assert!(
+ wait_for_condition(
+ || counters.dispatch_count() > dispatch_count,
+ Duration::from_secs(2),
+ Duration::from_millis(10),
+ )
+ .await,
+ "Service should continue dispatching after reinit"
+ );
+
+ // Shutdown
+ shutdown_token.cancel();
+ let _ = handle.await;
+}
--
2.47.3
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