☕ TuskLang Java Advanced Features Guide

"We don't bow to any king" - Java Edition

Master advanced TuskLang features in Java including FUJSEN execution, comprehensive @ operators, caching strategies, monitoring, and enterprise-grade features.

🚀 FUJSEN (Function Serialization)

Basic FUJSEN Functions

Define executable JavaScript functions in TuskLang
[payment]
process_fujsen: """
function process(amount, recipient) {
    if (amount <= 0) {
        throw new Error("Invalid amount");
    }
    
    return {
        success: true,
        transactionId: "tx_" + Date.now(),
        amount: amount,
        recipient: recipient,
        fee: amount * 0.025,
        timestamp: new Date().toISOString()
    };
}
"""
validate_fujsen: """
function validate(amount) {
    return amount > 0 && amount <= 1000000;
}
"""
calculate_tax_fujsen: """
function calculateTax(amount, country) {
    const taxRates = {
        'US': 0.08,
        'CA': 0.13,
        'UK': 0.20,
        'EU': 0.21
    };
    
    const rate = taxRates[country] || 0.10;
    return amount * rate;
}
"""

Java FUJSEN Execution

import org.tusklang.java.TuskLang;
import java.util.Map;
public class FujsenExample {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        Map<String, Object> config = parser.parseFile("config.tsk");
        
        // Execute payment processing
        Map<String, Object> result = parser.executeFujsen(
            "payment", 
            "process", 
            100.0, 
            "alice@example.com"
        );
        
        System.out.println("Payment result: " + result);
        
        // Validate amount
        boolean isValid = parser.executeFujsen("payment", "validate", 500.0);
        System.out.println("Amount valid: " + isValid);
        
        // Calculate tax
        Double tax = parser.executeFujsen("payment", "calculateTax", 1000.0, "US");
        System.out.println("Tax amount: $" + tax);
    }
}

Advanced FUJSEN with Database Integration

[user_management]
create_user_fujsen: """
function createUser(name, email, role) {
    // Validate input
    if (!name || !email) {
        throw new Error("Name and email are required");
    }
    
    // Check if user exists
    const existingUser = @query("SELECT id FROM users WHERE email = ?", email);
    if (existingUser.length > 0) {
        throw new Error("User already exists");
    }
    
    // Create user
    const result = @query("INSERT INTO users (name, email, role, created_at) VALUES (?, ?, ?, ?)", 
                         name, email, role, new Date().toISOString());
    
    return {
        success: true,
        userId: result.insertId,
        message: "User created successfully"
    };
}
"""
update_user_fujsen: """
function updateUser(userId, updates) {
    const allowedFields = ['name', 'email', 'role', 'active'];
    const validUpdates = {};
    
    for (const field of allowedFields) {
        if (updates[field] !== undefined) {
            validUpdates[field] = updates[field];
        }
    }
    
    if (Object.keys(validUpdates).length === 0) {
        throw new Error("No valid fields to update");
    }
    
    const setClause = Object.keys(validUpdates).map(field => field + " = ?").join(", ");
    const values = Object.values(validUpdates);
    values.push(userId);
    
    const result = @query("UPDATE users SET " + setClause + " WHERE id = ?", ...values);
    
    return {
        success: result.affectedRows > 0,
        message: result.affectedRows > 0 ? "User updated successfully" : "User not found"
    };
}
"""

Java Advanced FUJSEN Usage

import org.tusklang.java.TuskLang;
import org.tusklang.java.adapters.PostgreSQLAdapter;
import java.util.Map;
import java.util.HashMap;
public class AdvancedFujsenExample {
    public static void main(String[] args) {
        // Setup database
        PostgreSQLAdapter db = new PostgreSQLAdapter(PostgreSQLConfig.builder()
            .host("localhost")
            .port(5432)
            .database("myapp")
            .user("postgres")
            .password("secret")
            .build());
        
        TuskLang parser = new TuskLang();
        parser.setDatabaseAdapter(db);
        Map<String, Object> config = parser.parseFile("config.tsk");
        
        // Create user
        Map<String, Object> createResult = parser.executeFujsen(
            "user_management",
            "createUser",
            "John Doe",
            "john@example.com",
            "user"
        );
        System.out.println("Create result: " + createResult);
        
        // Update user
        Map<String, Object> updates = new HashMap<>();
        updates.put("name", "John Smith");
        updates.put("active", true);
        
        Map<String, Object> updateResult = parser.executeFujsen(
            "user_management",
            "updateUser",
            createResult.get("userId"),
            updates
        );
        System.out.println("Update result: " + updateResult);
    }
}

⚡ Comprehensive @ Operators

Environment Variables

Basic environment variables
[database]
host: @env("DB_HOST", "localhost")
port: @env("DB_PORT", "5432")
password: @env.secure("DB_PASSWORD")
[api]
key: @env("API_KEY")
url: @env("API_URL", "https://api.example.com")
Environment-specific configuration
@if(@env("APP_ENV") == "production")
    [logging]
    level: "ERROR"
    file: "/var/log/app.log"
@else
    [logging]
    level: "DEBUG"
    file: "app.log"
@endif

Date and Time Operations

[timestamps]
current_time: @date.now()
formatted_date: @date("yyyy-MM-dd HH:mm:ss")
iso_date: @date("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'")
[relative_dates]
yesterday: @date.subtract("1d")
last_week: @date.subtract("7d")
last_month: @date.subtract("30d")
next_week: @date.add("7d")
next_month: @date.add("30d")
[date_math]
start_of_month: @date.startOfMonth()
end_of_month: @date.endOfMonth()
start_of_week: @date.startOfWeek()
end_of_week: @date.endOfWeek()

Caching Operations

[expensive_data]
user_profile: @cache("5m", "get_user_profile", @request.user_id)
analytics: @cache("1h", "get_analytics_data")
system_status: @cache("30s", "get_system_status")
[smart_cache]
user_data: @cache.smart("get_user_data", @request.user_id, {
    "ttl": "10m",
    "stale_while_revalidate": "1h",
    "background_refresh": true
})

HTTP Requests

[external_data]
weather: @http("GET", "https://api.weatherapi.com/v1/current.json?key=YOUR_KEY&q=London")
exchange_rate: @http("GET", "https://api.exchangerate-api.com/v4/latest/USD")
user_geo: @http("GET", "https://ipapi.co/json/")
[api_calls]
create_user: @http("POST", "https://api.example.com/users", {
    "headers": {
        "Authorization": "Bearer " + @env("API_TOKEN"),
        "Content-Type": "application/json"
    },
    "body": {
        "name": @request.body.name,
        "email": @request.body.email
    }
})

Machine Learning Integration

[ml_predictions]
user_churn: @learn("user_churn_model", @request.user_features)
recommendation: @learn("product_recommendation", @request.user_id)
fraud_score: @learn("fraud_detection", @request.transaction_data)
[optimization]
optimal_price: @optimize("price_optimization", {
    "product_id": @request.product_id,
    "demand_curve": @request.demand_data,
    "costs": @request.cost_data
})

Metrics and Monitoring

[metrics]
response_time: @metrics("api_response_time_ms", @request.response_time)
error_rate: @metrics("api_error_rate", @request.error_count)
user_activity: @metrics("user_activity", @request.user_actions)
[monitoring]
health_check: @health("database_connection")
performance: @performance("query_execution_time")
availability: @availability("service_uptime")

Java @ Operator Implementation

import org.tusklang.java.TuskLang;
import org.tusklang.java.operators.*;
import java.util.Map;
public class OperatorExample {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        
        // Configure operators
        parser.setEnvironmentOperator(new EnvironmentOperator());
        parser.setDateOperator(new DateOperator());
        parser.setCacheOperator(new CacheOperator());
        parser.setHttpOperator(new HttpOperator());
        parser.setMetricsOperator(new MetricsOperator());
        
        // Parse with @ operators
        Map<String, Object> config = parser.parseFile("config.tsk");
        
        System.out.println("Configuration with operators: " + config);
    }
}

🔄 Advanced Caching Strategies

Multi-Level Caching

[multi_level_cache]
user_data: @cache.multi({
    "l1": {
        "type": "memory",
        "ttl": "1m"
    },
    "l2": {
        "type": "redis",
        "ttl": "10m"
    },
    "l3": {
        "type": "database",
        "ttl": "1h"
    }
}, "get_user_data", @request.user_id)

Cache Invalidation

[cache_management]
user_profile: @cache("5m", "get_user_profile", @request.user_id)
user_orders: @cache("2m", "get_user_orders", @request.user_id)
Invalidate related caches
@cache.invalidate("user_profile", @request.user_id)
@cache.invalidate.pattern("user_*", @request.user_id)

Java Caching Implementation

import org.tusklang.java.cache.*;
import java.util.Map;
public class CachingExample {
    public static void main(String[] args) {
        // Configure cache manager
        CacheManager cacheManager = new CacheManager();
        
        // Add cache layers
        cacheManager.addLayer("memory", new MemoryCacheLayer());
        cacheManager.addLayer("redis", new RedisCacheLayer("localhost", 6379));
        cacheManager.addLayer("database", new DatabaseCacheLayer());
        
        TuskLang parser = new TuskLang();
        parser.setCacheManager(cacheManager);
        
        // Use multi-level caching
        Map<String, Object> config = parser.parseFile("config.tsk");
        
        // Manual cache operations
        cacheManager.set("key", "value", 300); // 5 minutes
        Object value = cacheManager.get("key");
        cacheManager.delete("key");
        
        System.out.println("Cached value: " + value);
    }
}

📊 Monitoring and Observability

Application Metrics

[application_metrics]
request_count: @metrics.counter("http_requests_total", {
    "method": @request.method,
    "endpoint": @request.path,
    "status": @response.status
})
response_time: @metrics.histogram("http_response_time_seconds", @request.duration)
active_users: @metrics.gauge("active_users", @request.active_user_count)
error_rate: @metrics.rate("error_rate", @request.error_count)

Health Checks

[health_checks]
database: @health.check("database_connection", {
    "query": "SELECT 1",
    "timeout": "5s"
})
redis: @health.check("redis_connection", {
    "command": "PING",
    "timeout": "2s"
})
external_api: @health.check("external_api", {
    "url": "https://api.example.com/health",
    "timeout": "10s"
})

Java Monitoring Implementation

import org.tusklang.java.monitoring.*;
import io.micrometer.core.instrument.MeterRegistry;
import java.util.Map;
public class MonitoringExample {
    public static void main(String[] args) {
        // Configure monitoring
        MeterRegistry meterRegistry = new SimpleMeterRegistry();
        
        MonitoringManager monitoringManager = new MonitoringManager(meterRegistry);
        
        TuskLang parser = new TuskLang();
        parser.setMonitoringManager(monitoringManager);
        
        // Parse with monitoring
        Map<String, Object> config = parser.parseFile("config.tsk");
        
        // Manual metrics
        monitoringManager.incrementCounter("custom_metric", "tag1", "value1");
        monitoringManager.recordTimer("custom_timer", 150); // milliseconds
        monitoringManager.setGauge("custom_gauge", 42.0);
        
        System.out.println("Monitoring configured");
    }
}

🔒 Security Features

Encryption and Decryption

[security]
encrypted_password: @encrypt("sensitive_password", "AES-256-GCM")
decrypted_data: @decrypt(@env("ENCRYPTED_DATA"), "AES-256-GCM")
[secrets]
api_key: @secret.get("api_key")
database_password: @secret.get("database_password")

Validation

[validation]
required_fields: @validate.required(["name", "email", "password"])
email_format: @validate.email(@request.email)
password_strength: @validate.password(@request.password, {
    "min_length": 8,
    "require_uppercase": true,
    "require_lowercase": true,
    "require_numbers": true,
    "require_special": true
})

Java Security Implementation

import org.tusklang.java.security.*;
import java.util.Map;
public class SecurityExample {
    public static void main(String[] args) {
        // Configure security manager
        SecurityManager securityManager = new SecurityManager();
        securityManager.setEncryptionKey(System.getenv("ENCRYPTION_KEY"));
        securityManager.setSecretStore(new VaultSecretStore());
        
        TuskLang parser = new TuskLang();
        parser.setSecurityManager(securityManager);
        
        // Parse with security features
        Map<String, Object> config = parser.parseFile("config.tsk");
        
        // Manual security operations
        String encrypted = securityManager.encrypt("sensitive_data");
        String decrypted = securityManager.decrypt(encrypted);
        
        System.out.println("Security configured");
    }
}

🔄 Advanced Integration Patterns

Event-Driven Architecture

[events]
user_created: @event.emit("user.created", {
    "user_id": @request.user_id,
    "email": @request.email,
    "timestamp": @date.now()
})
order_processed: @event.emit("order.processed", {
    "order_id": @request.order_id,
    "amount": @request.amount,
    "status": "completed"
})
Listen to events
@event.on("user.created", """
function handleUserCreated(data) {
    // Send welcome email
    @http("POST", "https://api.email.com/send", {
        "to": data.email,
        "template": "welcome",
        "data": data
    });
    
    // Update analytics
    @metrics.increment("users_created_total");
}
""")

Message Queues

[queue_operations]
send_notification: @queue.send("notifications", {
    "type": "email",
    "to": @request.email,
    "template": "welcome",
    "data": @request.user_data
})
process_order: @queue.send("orders", {
    "order_id": @request.order_id,
    "items": @request.items,
    "total": @request.total
})
Process queue messages
@queue.process("notifications", """
function processNotification(message) {
    const result = @http("POST", "https://api.email.com/send", message);
    return result.success;
}
""")

Java Event and Queue Implementation

import org.tusklang.java.events.*;
import org.tusklang.java.queues.*;
import java.util.Map;
public class IntegrationExample {
    public static void main(String[] args) {
        // Configure event system
        EventManager eventManager = new EventManager();
        eventManager.addListener("user.created", event -> {
            System.out.println("User created: " + event.getData());
        });
        
        // Configure queue system
        QueueManager queueManager = new QueueManager();
        queueManager.addQueue("notifications", new RedisQueue("localhost", 6379));
        queueManager.addQueue("orders", new RabbitMQQueue("localhost", 5672));
        
        TuskLang parser = new TuskLang();
        parser.setEventManager(eventManager);
        parser.setQueueManager(queueManager);
        
        // Parse with integration features
        Map<String, Object> config = parser.parseFile("config.tsk");
        
        System.out.println("Integration configured");
    }
}

🧪 Testing Advanced Features

FUJSEN Testing

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
import org.tusklang.java.TuskLang;
class FujsenTest {
    
    @Test
    void testPaymentProcessing() {
        TuskLang parser = new TuskLang();
        Map<String, Object> config = parser.parseFile("config.tsk");
        
        // Test payment processing
        Map<String, Object> result = parser.executeFujsen("payment", "process", 100.0, "test@example.com");
        
        assertTrue((Boolean) result.get("success"));
        assertNotNull(result.get("transactionId"));
        assertEquals(100.0, result.get("amount"));
        assertEquals(2.5, result.get("fee"));
    }
    
    @Test
    void testValidation() {
        TuskLang parser = new TuskLang();
        Map<String, Object> config = parser.parseFile("config.tsk");
        
        // Test validation
        assertTrue(parser.executeFujsen("payment", "validate", 500.0));
        assertFalse(parser.executeFujsen("payment", "validate", -100.0));
        assertFalse(parser.executeFujsen("payment", "validate", 2000000.0));
    }
}

Operator Testing

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
import org.tusklang.java.TuskLang;
class OperatorTest {
    
    @Test
    void testEnvironmentOperator() {
        System.setProperty("TEST_VAR", "test_value");
        
        TuskLang parser = new TuskLang();
        String tskContent = """
            [test]
            value: @env("TEST_VAR", "default")
            """;
        
        Map<String, Object> config = parser.parse(tskContent);
        assertEquals("test_value", config.get("test"));
    }
    
    @Test
    void testDateOperator() {
        TuskLang parser = new TuskLang();
        String tskContent = """
            [dates]
            now: @date.now()
            formatted: @date("yyyy-MM-dd")
            """;
        
        Map<String, Object> config = parser.parse(tskContent);
        assertNotNull(config.get("dates"));
    }
}

🔧 Performance Optimization

Lazy Loading

[lazy_data]
user_profiles: @lazy("load_user_profiles")
detailed_analytics: @lazy("load_detailed_analytics")
expensive_calculations: @lazy("perform_calculations")

Parallel Processing

[parallel_data]
data1: @async("operation1")
data2: @async("operation2")
data3: @async("operation3")
data4: @async("operation4")

Java Performance Implementation

import org.tusklang.java.TuskLang;
import java.util.concurrent.CompletableFuture;
import java.util.Map;
public class PerformanceExample {
    public static void main(String[] args) {
        TuskLang parser = new TuskLang();
        
        // Parallel processing
        CompletableFuture<Map<String, Object>> future1 = parser.parseAsync("config1.tsk");
        CompletableFuture<Map<String, Object>> future2 = parser.parseAsync("config2.tsk");
        CompletableFuture<Map<String, Object>> future3 = parser.parseAsync("config3.tsk");
        
        // Wait for all to complete
        CompletableFuture.allOf(future1, future2, future3).join();
        
        Map<String, Object> config1 = future1.get();
        Map<String, Object> config2 = future2.get();
        Map<String, Object> config3 = future3.get();
        
        System.out.println("All configurations loaded in parallel");
    }
}

📚 Next Steps

1. Master FUJSEN functions - Build complex business logic in configuration 2. Implement comprehensive monitoring - Metrics, health checks, and observability 3. Add security features - Encryption, validation, and secret management 4. Build event-driven applications - Event emission and processing 5. Optimize performance - Caching, lazy loading, and parallel processing

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"We don't bow to any king" - You now have complete mastery of advanced TuskLang features in Java! From FUJSEN execution to comprehensive monitoring, you can build enterprise-grade applications with powerful configuration-driven logic.