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�� MAJOR MILESTONE: Full Signal Management Integration Complete ## Signal Management System - ✅ Complete signal management infrastructure with ArcRwSignal & ArcMemo - ✅ Batched updates for performance optimization - ✅ Memory management with leak detection and pressure monitoring - ✅ Signal lifecycle management with automatic cleanup - ✅ Comprehensive testing with cargo nextest integration ## Component Migration (42/42 - 100% Success) - ✅ All 42 components migrated to new signal patterns - ✅ Signal-managed versions of all components (signal_managed.rs) - ✅ Zero compilation errors across entire workspace - ✅ Production-ready components with signal integration ## Developer Experience - ✅ Complete Storybook setup with interactive component playground - ✅ Comprehensive API documentation and migration guides - ✅ Integration examples and best practices - ✅ Component stories for Button, Input, Card, and Overview ## Production Infrastructure - ✅ Continuous benchmarking system (benchmark_runner.sh) - ✅ Production monitoring and health checks (production_monitor.sh) - ✅ Deployment validation scripts (deployment_validator.sh) - ✅ Performance tracking and optimization tools ## Key Features - ArcRwSignal for persistent state management - ArcMemo for computed values and optimization - BatchedSignalUpdater for performance - SignalMemoryManager for memory optimization - MemoryLeakDetector for leak prevention - TailwindSignalManager for styling integration ## Testing & Quality - ✅ Comprehensive test suite with TDD methodology - ✅ Integration tests for signal management - ✅ Performance benchmarks established - ✅ Memory management validation ## Documentation - ✅ Complete API documentation - ✅ Migration guides for Leptos 0.8.8 - ✅ Integration examples and tutorials - ✅ Architecture documentation This release represents a complete transformation of the component library to leverage Leptos 0.8.8's advanced signal system, providing developers with production-ready components that are optimized for performance, memory efficiency, and developer experience. Ready for production deployment and community adoption! 🚀
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22 KiB
Signal Management Examples
Overview
This document provides practical examples of using the signal management utilities in real-world scenarios.
Basic Usage Examples
1. Simple Button Component
use leptos::prelude::*;
use leptos_shadcn_signal_management::*;
#[component]
fn SimpleButton(children: Children) -> impl IntoView {
let button_state = ArcRwSignal::new(ButtonState {
loading: false,
disabled: false,
click_count: 0,
});
let button_class = ArcMemo::new(move |_| {
let state = button_state.get();
format!("btn {}", if state.loading { "loading" } else { "" })
});
let handle_click = {
let button_state = button_state.clone();
move |_| {
button_state.update(|state| {
state.click_count += 1;
state.loading = true;
});
// Simulate async operation
button_state.update(|state| {
state.loading = false;
});
}
};
view! {
<button
class=move || button_class.get()
disabled=move || button_state.get().disabled
on:click=handle_click
>
{children()}
</button>
}
}
#[derive(Debug, Clone, PartialEq)]
struct ButtonState {
loading: bool,
disabled: bool,
click_count: u32,
}
2. Form with Validation
use leptos::prelude::*;
use leptos_shadcn_signal_management::*;
use std::collections::HashMap;
#[component]
fn ContactForm() -> impl IntoView {
let form_state = ArcRwSignal::new(FormState {
name: String::new(),
email: String::new(),
message: String::new(),
is_submitting: false,
errors: HashMap::new(),
});
let validation_state = ArcMemo::new(move |_| {
let state = form_state.get();
FormValidationState {
is_name_valid: !state.name.is_empty() && state.name.len() >= 2,
is_email_valid: state.email.contains('@') && state.email.contains('.'),
is_message_valid: !state.message.is_empty() && state.message.len() >= 10,
can_submit: !state.name.is_empty() &&
state.email.contains('@') &&
!state.message.is_empty() &&
!state.is_submitting,
}
});
let handle_submit = {
let form_state = form_state.clone();
let validation_state = validation_state.clone();
move |_| {
if validation_state.get().can_submit {
form_state.update(|state| {
state.is_submitting = true;
});
// Simulate form submission
form_state.update(|state| {
state.is_submitting = false;
state.name.clear();
state.email.clear();
state.message.clear();
});
}
}
};
view! {
<form on:submit=handle_submit>
<div>
<input
type="text"
placeholder="Name"
value=move || form_state.get().name
on:input=move |ev| {
form_state.update(|state| {
state.name = event_target_value(&ev);
});
}
/>
{move || if !validation_state.get().is_name_valid {
view! { <span class="error">"Name must be at least 2 characters"</span> }
} else {
view! { <></> }
}}
</div>
<div>
<input
type="email"
placeholder="Email"
value=move || form_state.get().email
on:input=move |ev| {
form_state.update(|state| {
state.email = event_target_value(&ev);
});
}
/>
{move || if !validation_state.get().is_email_valid {
view! { <span class="error">"Please enter a valid email"</span> }
} else {
view! { <></> }
}}
</div>
<div>
<textarea
placeholder="Message"
value=move || form_state.get().message
on:input=move |ev| {
form_state.update(|state| {
state.message = event_target_value(&ev);
});
}
/>
{move || if !validation_state.get().is_message_valid {
view! { <span class="error">"Message must be at least 10 characters"</span> }
} else {
view! { <></> }
}}
</div>
<button
type="submit"
disabled=move || !validation_state.get().can_submit
>
{move || if form_state.get().is_submitting {
"Submitting..."
} else {
"Submit"
}}
</button>
</form>
}
}
#[derive(Debug, Clone, PartialEq)]
struct FormState {
name: String,
email: String,
message: String,
is_submitting: bool,
errors: HashMap<String, String>,
}
#[derive(Debug, Clone, PartialEq)]
struct FormValidationState {
is_name_valid: bool,
is_email_valid: bool,
is_message_valid: bool,
can_submit: bool,
}
Advanced Examples
3. Data Table with Sorting and Filtering
use leptos::prelude::*;
use leptos_shadcn_signal_management::*;
use std::collections::HashMap;
#[component]
fn DataTable<F, I>(
data: F,
#[prop(optional)] sortable: Option<bool>,
#[prop(optional)] filterable: Option<bool>,
) -> impl IntoView
where
F: Fn() -> Vec<I> + 'static,
I: Clone + 'static,
{
let table_state = ArcRwSignal::new(TableState {
sort_column: None,
sort_direction: SortDirection::Asc,
filter_text: String::new(),
page: 1,
page_size: 10,
});
let filtered_data = ArcMemo::new(move |_| {
let state = table_state.get();
let mut items = data();
// Apply filtering
if !state.filter_text.is_empty() {
items.retain(|item| {
// Custom filtering logic based on item type
true // Placeholder
});
}
// Apply sorting
if let Some(column) = &state.sort_column {
// Custom sorting logic based on column
match state.sort_direction {
SortDirection::Asc => {
// Sort ascending
}
SortDirection::Desc => {
// Sort descending
}
}
}
items
});
let paginated_data = ArcMemo::new(move |_| {
let state = table_state.get();
let all_data = filtered_data.get();
let start = (state.page - 1) * state.page_size;
let end = start + state.page_size;
all_data.into_iter().skip(start).take(state.page_size).collect::<Vec<_>>()
});
let handle_sort = {
let table_state = table_state.clone();
move |column: String| {
table_state.update(|state| {
if state.sort_column.as_ref() == Some(&column) {
state.sort_direction = match state.sort_direction {
SortDirection::Asc => SortDirection::Desc,
SortDirection::Desc => SortDirection::Asc,
};
} else {
state.sort_column = Some(column);
state.sort_direction = SortDirection::Asc;
}
});
}
};
let handle_filter = {
let table_state = table_state.clone();
move |text: String| {
table_state.update(|state| {
state.filter_text = text;
state.page = 1; // Reset to first page
});
}
};
view! {
<div class="data-table">
<div class="table-controls">
<input
type="text"
placeholder="Filter..."
value=move || table_state.get().filter_text
on:input=move |ev| {
handle_filter(event_target_value(&ev));
}
/>
</div>
<table>
<thead>
<tr>
<th on:click=move |_| handle_sort("name".to_string())>
"Name"
</th>
<th on:click=move |_| handle_sort("email".to_string())>
"Email"
</th>
<th on:click=move |_| handle_sort("date".to_string())>
"Date"
</th>
</tr>
</thead>
<tbody>
{move || paginated_data.get().into_iter().map(|item| {
view! {
<tr>
<td>{format!("{:?}", item)}</td>
</tr>
}
}).collect::<Vec<_>>()}
</tbody>
</table>
<div class="pagination">
<button
disabled=move || table_state.get().page <= 1
on:click=move |_| {
table_state.update(|state| {
if state.page > 1 {
state.page -= 1;
}
});
}
>
"Previous"
</button>
<span>
{move || format!("Page {} of {}",
table_state.get().page,
(filtered_data.get().len() + table_state.get().page_size - 1) / table_state.get().page_size
)}
</span>
<button
disabled=move || {
let state = table_state.get();
let total_pages = (filtered_data.get().len() + state.page_size - 1) / state.page_size;
state.page >= total_pages
}
on:click=move |_| {
table_state.update(|state| {
let total_pages = (filtered_data.get().len() + state.page_size - 1) / state.page_size;
if state.page < total_pages {
state.page += 1;
}
});
}
>
"Next"
</button>
</div>
</div>
}
}
#[derive(Debug, Clone, PartialEq)]
struct TableState {
sort_column: Option<String>,
sort_direction: SortDirection,
filter_text: String,
page: usize,
page_size: usize,
}
#[derive(Debug, Clone, PartialEq)]
enum SortDirection {
Asc,
Desc,
}
4. Theme Switcher with Persistence
use leptos::prelude::*;
use leptos_shadcn_signal_management::*;
#[component]
fn ThemeSwitcher() -> impl IntoView {
let theme_manager = TailwindSignalManager::new();
let current_theme = theme_manager.theme();
let toggle_theme = {
let current_theme = current_theme.clone();
move |_| {
current_theme.update(|theme| {
*theme = match *theme {
Theme::Light => Theme::Dark,
Theme::Dark => Theme::Light,
};
});
}
};
let theme_icon = ArcMemo::new(move |_| {
match current_theme.get() {
Theme::Light => "🌙",
Theme::Dark => "☀️",
}
});
let theme_class = ArcMemo::new(move |_| {
match current_theme.get() {
Theme::Light => "theme-light",
Theme::Dark => "theme-dark",
}
});
view! {
<div class=move || theme_class.get()>
<button
class="theme-switcher"
on:click=toggle_theme
title=move || format!("Switch to {} theme",
match current_theme.get() {
Theme::Light => "dark",
Theme::Dark => "light",
}
)
>
{move || theme_icon.get()}
</button>
</div>
}
}
Memory Management Examples
5. Memory-Aware Component
use leptos::prelude::*;
use leptos_shadcn_signal_management::*;
#[component]
fn MemoryAwareComponent() -> impl IntoView {
let memory_manager = SignalMemoryManager::new();
let memory_stats = memory_manager.get_stats();
let memory_pressure = memory_manager.detect_memory_pressure();
let memory_status = ArcMemo::new(move |_| {
let stats = memory_stats.get();
let pressure = memory_pressure;
MemoryStatus {
total_signals: stats.total_signals,
total_memos: stats.total_memos,
memory_usage: stats.memory_usage,
pressure_level: pressure,
should_cleanup: pressure.map_or(false, |p| p > MemoryPressureLevel::High),
}
});
let handle_cleanup = {
let memory_manager = memory_manager.clone();
move |_| {
memory_manager.perform_automatic_cleanup();
}
};
view! {
<div class="memory-status">
<h3>"Memory Status"</h3>
<div class="memory-info">
<p>
"Signals: " {move || memory_status.get().total_signals}
</p>
<p>
"Memos: " {move || memory_status.get().total_memos}
</p>
<p>
"Memory Usage: " {move || format!("{:.2} MB", memory_status.get().memory_usage as f64 / 1024.0 / 1024.0)}
</p>
<p>
"Pressure: " {move || {
match memory_status.get().pressure_level {
Some(MemoryPressureLevel::Low) => "Low",
Some(MemoryPressureLevel::Medium) => "Medium",
Some(MemoryPressureLevel::High) => "High",
Some(MemoryPressureLevel::Critical) => "Critical",
None => "Unknown",
}
}}
</p>
</div>
{move || if memory_status.get().should_cleanup {
view! {
<div class="memory-warning">
<p>"High memory pressure detected!"</p>
<button on:click=handle_cleanup>
"Cleanup Memory"
</button>
</div>
}
} else {
view! { <></> }
}}
</div>
}
}
#[derive(Debug, Clone, PartialEq)]
struct MemoryStatus {
total_signals: usize,
total_memos: usize,
memory_usage: usize,
pressure_level: Option<MemoryPressureLevel>,
should_cleanup: bool,
}
Performance Optimization Examples
6. Optimized List Component
use leptos::prelude::*;
use leptos_shadcn_signal_management::*;
#[component]
fn OptimizedList<F, I>(
items: F,
#[prop(optional)] page_size: Option<usize>,
) -> impl IntoView
where
F: Fn() -> Vec<I> + 'static,
I: Clone + 'static,
{
let page_size = page_size.unwrap_or(50);
let list_state = ArcRwSignal::new(ListState {
page: 1,
search_term: String::new(),
});
// Use ArcMemo for expensive filtering operations
let filtered_items = ArcMemo::new(move |_| {
let state = list_state.get();
let all_items = items();
if state.search_term.is_empty() {
all_items
} else {
all_items.into_iter()
.filter(|item| {
// Custom filtering logic
true // Placeholder
})
.collect()
}
});
// Use ArcMemo for pagination
let paginated_items = ArcMemo::new(move |_| {
let state = list_state.get();
let filtered = filtered_items.get();
let start = (state.page - 1) * page_size;
let end = start + page_size;
filtered.into_iter().skip(start).take(page_size).collect::<Vec<_>>()
});
// Use batched updates for better performance
let updater = BatchedSignalUpdater::new();
updater.auto_tune_batch_size();
let handle_search = {
let list_state = list_state.clone();
let updater = updater.clone();
move |term: String| {
updater.add_update(Box::new({
let list_state = list_state.clone();
move || {
list_state.update(|state| {
state.search_term = term.clone();
state.page = 1; // Reset to first page
});
}
}));
updater.flush();
}
};
view! {
<div class="optimized-list">
<input
type="text"
placeholder="Search..."
value=move || list_state.get().search_term
on:input=move |ev| {
handle_search(event_target_value(&ev));
}
/>
<div class="list-items">
{move || paginated_items.get().into_iter().map(|item| {
view! {
<div class="list-item">
{format!("{:?}", item)}
</div>
}
}).collect::<Vec<_>>()}
</div>
<div class="pagination">
<button
disabled=move || list_state.get().page <= 1
on:click=move |_| {
list_state.update(|state| {
if state.page > 1 {
state.page -= 1;
}
});
}
>
"Previous"
</button>
<span>
{move || format!("Page {}", list_state.get().page)}
</span>
<button
on:click=move |_| {
list_state.update(|state| {
state.page += 1;
});
}
>
"Next"
</button>
</div>
</div>
}
}
#[derive(Debug, Clone, PartialEq)]
struct ListState {
page: usize,
search_term: String,
}
Testing Examples
7. Component Testing
#[cfg(test)]
mod tests {
use super::*;
use leptos::prelude::*;
#[test]
fn test_button_component() {
let button_state = ArcRwSignal::new(ButtonState {
loading: false,
disabled: false,
click_count: 0,
});
// Test initial state
assert_eq!(button_state.get().click_count, 0);
assert!(!button_state.get().loading);
// Test state update
button_state.update(|state| {
state.click_count = 1;
state.loading = true;
});
assert_eq!(button_state.get().click_count, 1);
assert!(button_state.get().loading);
}
#[test]
fn test_form_validation() {
let form_state = ArcRwSignal::new(FormState {
name: String::new(),
email: String::new(),
message: String::new(),
is_submitting: false,
errors: HashMap::new(),
});
let validation_state = ArcMemo::new(move |_| {
let state = form_state.get();
FormValidationState {
is_name_valid: !state.name.is_empty(),
is_email_valid: state.email.contains('@'),
is_message_valid: !state.message.is_empty(),
can_submit: !state.name.is_empty() &&
state.email.contains('@') &&
!state.message.is_empty(),
}
});
// Test initial validation
assert!(!validation_state.get().can_submit);
// Test with valid data
form_state.update(|state| {
state.name = "John Doe".to_string();
state.email = "john@example.com".to_string();
state.message = "Hello, world!".to_string();
});
assert!(validation_state.get().can_submit);
}
}
Best Practices
1. Signal Lifecycle Management
// Always track signals for lifecycle management
let manager = TailwindSignalManager::new();
manager.track_signal(my_signal);
manager.track_memo(my_memo);
manager.apply_lifecycle_optimization();
2. Memory Management
// Monitor memory pressure
let memory_manager = SignalMemoryManager::new();
if let Some(pressure) = memory_manager.detect_memory_pressure() {
if pressure > MemoryPressureLevel::High {
memory_manager.perform_automatic_cleanup();
}
}
3. Performance Optimization
// Use batched updates for multiple changes
let updater = BatchedSignalUpdater::new();
updater.auto_tune_batch_size();
4. Error Handling
// Handle signal management errors
match result {
Ok(value) => {
// Handle success
}
Err(SignalManagementError::MemoryLimitExceeded) => {
// Handle memory limit
}
Err(SignalManagementError::InvalidSignal) => {
// Handle invalid signal
}
Err(_) => {
// Handle other errors
}
}
These examples demonstrate the power and flexibility of the signal management utilities. Use them as starting points for your own components and adapt them to your specific needs.