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WordPress柔性供应链软件开发中的微服务架构教程

教程文章 EXCHANGES® · 2026年1月27日 8:18 · 0阅读 · 0评论

WordPress柔性供应链软件开发中的微服务架构教程

引言：为什么柔性供应链需要微服务架构

在当今快速变化的商业环境中，柔性供应链系统已成为企业保持竞争力的关键。传统的单体式WordPress插件在处理复杂供应链逻辑时往往面临扩展性差、维护困难等问题。微服务架构通过将系统拆分为独立部署的小型服务，为WordPress柔性供应链软件提供了理想的解决方案。

本文将详细介绍如何在WordPress环境中实现柔性供应链的微服务架构，包含完整的代码示例和最佳实践。

微服务架构核心概念

服务拆分原则

在供应链系统中，我们可以按业务领域拆分为以下微服务：

  • 库存管理服务
  • 订单处理服务
  • 物流跟踪服务
  • 供应商管理服务
  • 需求预测服务

通信机制选择

微服务之间通常采用REST API或消息队列进行通信。对于实时性要求高的操作，建议使用REST；对于异步处理，消息队列是更好的选择。

环境搭建与基础配置

Docker容器化部署

<?php
/**
 * Docker Compose配置文件示例
 * 用于部署WordPress和微服务集群
 */

// docker-compose.yml
$dockerCompose = <<<YAML
version: '3.8'

services:
  # WordPress核心容器
  wordpress:
    image: wordpress:latest
    ports:
      - "8080:80"
    environment:
      WORDPRESS_DB_HOST: mysql
      WORDPRESS_DB_USER: wp_user
      WORDPRESS_DB_PASSWORD: wp_password
    volumes:
      - ./wp-content:/var/www/html/wp-content
  
  # MySQL数据库
  mysql:
    image: mysql:8.0
    environment:
      MYSQL_ROOT_PASSWORD: root_password
      MYSQL_DATABASE: wordpress
      MYSQL_USER: wp_user
      MYSQL_PASSWORD: wp_password
  
  # 库存微服务
  inventory-service:
    build: ./services/inventory
    ports:
      - "3001:3000"
    environment:
      DB_HOST: inventory-db
      REDIS_HOST: redis
  
  # 订单微服务
  order-service:
    build: ./services/order
    ports:
      - "3002:3000"
  
  # API网关
  api-gateway:
    build: ./gateway
    ports:
      - "3000:3000"
YAML;

file_put_contents('docker-compose.yml', $dockerCompose);
echo "Docker Compose配置文件已生成";
?>

库存管理微服务实现

REST API端点设计

<?php
/**
 * 库存管理微服务API示例
 * 使用Slim PHP微框架
 */

require __DIR__ . '/vendor/autoload.php';

use PsrHttpMessageResponseInterface as Response;
use PsrHttpMessageServerRequestInterface as Request;
use SlimFactoryAppFactory;
use DIContainer;

// 创建应用实例
$app = AppFactory::create();

// 添加中间件
$app->addBodyParsingMiddleware();

/**
 * 获取库存信息
 * GET /api/inventory/{product_id}
 */
$app->get('/api/inventory/{product_id}', function (Request $request, Response $response, $args) {
    $productId = $args['product_id'];
    
    // 模拟数据库查询
    $inventoryData = [
        'product_id' => $productId,
        'quantity' => 150,
        'location' => 'WH-01',
        'last_updated' => date('Y-m-d H:i:s'),
        'reserved' => 25
    ];
    
    // 计算可用库存
    $inventoryData['available'] = $inventoryData['quantity'] - $inventoryData['reserved'];
    
    $response->getBody()->write(json_encode([
        'success' => true,
        'data' => $inventoryData
    ]));
    
    return $response
        ->withHeader('Content-Type', 'application/json')
        ->withStatus(200);
});

/**
 * 更新库存
 * PUT /api/inventory/{product_id}
 */
$app->put('/api/inventory/{product_id}', function (Request $request, Response $response, $args) {
    $productId = $args['product_id'];
    $data = $request->getParsedBody();
    
    // 验证输入数据
    if (!isset($data['quantity']) || !is_numeric($data['quantity'])) {
        $response->getBody()->write(json_encode([
            'success' => false,
            'error' => '无效的数量值'
        ]));
        return $response->withStatus(400);
    }
    
    // 模拟库存更新逻辑
    $updateResult = [
        'product_id' => $productId,
        'new_quantity' => $data['quantity'],
        'previous_quantity' => 150,
        'updated_at' => date('Y-m-d H:i:s'),
        'operation' => $data['operation'] ?? 'manual_adjustment'
    ];
    
    // 发布库存变更事件（用于其他微服务）
    $this->get('eventBus')->publish('inventory.updated', $updateResult);
    
    $response->getBody()->write(json_encode([
        'success' => true,
        'message' => '库存更新成功',
        'data' => $updateResult
    ]));
    
    return $response
        ->withHeader('Content-Type', 'application/json')
        ->withStatus(200);
});

/**
 * 批量查询库存
 * POST /api/inventory/batch
 */
$app->post('/api/inventory/batch', function (Request $request, Response $response) {
    $data = $request->getParsedBody();
    $productIds = $data['product_ids'] ?? [];
    
    if (empty($productIds)) {
        $response->getBody()->write(json_encode([
            'success' => false,
            'error' => '未提供产品ID列表'
        ]));
        return $response->withStatus(400);
    }
    
    // 模拟批量查询
    $results = [];
    foreach ($productIds as $productId) {
        $results[] = [
            'product_id' => $productId,
            'quantity' => rand(50, 500),
            'available' => rand(30, 450)
        ];
    }
    
    $response->getBody()->write(json_encode([
        'success' => true,
        'data' => $results,
        'count' => count($results)
    ]));
    
    return $response
        ->withHeader('Content-Type', 'application/json')
        ->withStatus(200);
});

// 运行应用
$app->run();
?>

WordPress与微服务集成

自定义REST API端点

<?php
/**
 * WordPress插件：微服务集成
 * 提供WordPress与供应链微服务的桥梁
 */

class SupplyChain_Microservice_Integration {
    
    private $service_endpoints;
    
    public function __construct() {
        $this->service_endpoints = [
            'inventory' => 'http://inventory-service:3000/api',
            'order' => 'http://order-service:3000/api',
            'logistics' => 'http://logistics-service:3000/api'
        ];
        
        add_action('rest_api_init', [$this, 'register_rest_routes']);
        add_action('admin_menu', [$this, 'add_admin_menu']);
    }
    
    /**
     * 注册WordPress REST API路由
     */
    public function register_rest_routes() {
        // 获取产品库存
        register_rest_route('supply-chain/v1', '/inventory/(?P<id>d+)', [
            'methods' => 'GET',
            'callback' => [$this, 'get_product_inventory'],
            'permission_callback' => [$this, 'check_api_permission']
        ]);
        
        // 同步订单到微服务
        register_rest_route('supply-chain/v1', '/orders/sync', [
            'methods' => 'POST',
            'callback' => [$this, 'sync_order_to_microservice'],
            'permission_callback' => [$this, 'check_api_permission']
        ]);
        
        // 批量更新库存
        register_rest_route('supply-chain/v1', '/inventory/batch-update', [
            'methods' => 'PUT',
            'callback' => [$this, 'batch_update_inventory'],
            'permission_callback' => [$this, 'check_api_permission']
        ]);
    }
    
    /**
     * 获取产品库存信息
     */
    public function get_product_inventory($request) {
        $product_id = $request->get_param('id');
        
        // 调用库存微服务
        $response = wp_remote_get(
            $this->service_endpoints['inventory'] . '/inventory/' . $product_id,
            [
                'timeout' => 15,
                'headers' => [
                    'Content-Type' => 'application/json',
                    'X-API-Key' => $this->get_api_key()
                ]
            ]
        );
        
        if (is_wp_error($response)) {
            return new WP_Error('service_unavailable', '库存服务暂时不可用', ['status' => 503]);
        }
        
        $body = wp_remote_retrieve_body($response);
        $data = json_decode($body, true);
        
        return rest_ensure_response($data);
    }
    
    /**
     * 同步订单到订单微服务
     */
    public function sync_order_to_microservice($request) {
        $order_data = $request->get_json_params();
        
        // 验证订单数据
        if (!$this->validate_order_data($order_data)) {
            return new WP_Error('invalid_data', '订单数据格式错误', ['status' => 400]);
        }
        
        // 调用订单微服务
        $response = wp_remote_post(
            $this->service_endpoints['order'] . '/orders',
            [
                'method' => 'POST',
                'timeout' => 30,
                'headers' => [
                    'Content-Type' => 'application/json',
                    'X-API-Key' => $this->get_api_key()
                ],
                'body' => json_encode($order_data)
            ]
        );
        
        if (is_wp_error($response)) {
            // 失败时进入重试队列
            $this->queue_for_retry('order_sync', $order_data);
            return new WP_Error('sync_failed', '订单同步失败，已加入重试队列', ['status' => 500]);
        }
        
        $body = wp_remote_retrieve_body($response);
        $result = json_decode($body, true);
        
        // 更新本地订单状态
        if ($result['success'] && isset($order_data['wordpress_order_id'])) {
            $this->update_local_order_status($order_data['wordpress_order_id'], 'synced');
        }
        
        return rest_ensure_response($result);
    }
    
    /**
     * 批量更新库存
     */
    public function batch_update_inventory($request) {
        $updates = $request->get_json_params();
        
        // 调用库存微服务的批量接口
        $response = wp_remote_post(
            $this->service_endpoints['inventory'] . '/inventory/batch-update',
            [
                'method' => 'POST',
                'timeout' => 30,
                'headers' => [
                    'Content-Type' => 'application/json',
                    'X-API-Key' => $this->get_api_key()
                ],
                'body' => json_encode(['updates' => $updates])
            ]
        );
        
        if (is_wp_error($response)) {
            return new WP_Error('update_failed', '批量更新失败', ['status' => 500]);
        }
        
        $body = wp_remote_retrieve_body($response);
        $result = json_decode($body, true);
        
        return rest_ensure_response($result);
    }
    
    /**
     * 验证API权限
     */
    public function check_api_permission($request) {
        // 实际应用中应实现更复杂的权限验证
        return current_user_can('manage_options') || 
               $this->validate_api_key($request->get_header('X-API-Key'));
    }
    
    /**
     * 验证API密钥
     */
    private function validate_api_key($api_key) {
        $stored_key = get_option('supply_chain_api_key');
        return hash_equals($stored_key, $api_key);
    }
    
    /**
     * 获取API密钥
     */
    private function get_api_key() {
        return get_option('supply_chain_api_key', '');
    }
    
    /**
     * 验证订单数据
     */
    private function validate_order_data($order_data) {
        $required_fields = ['order_id', 'customer_id', 'items', 'total_amount'];
        
        foreach ($required_fields as $field) {
            if (!isset($order_data[$field])) {
                return false;
            }
        }
        
        return true;
    }
    
    /**
     * 添加到重试队列
     */
    private function queue_for_retry($action, $data) {
        $queue = get_option('supply_chain_retry_queue', []);
        $queue[] = [
            'action' => $action,
            'data' => $data,
            'attempts' => 0,
            'scheduled_for' => time() + 300 // 5分钟后重试
        ];
        update_option('supply_chain_retry_queue', $queue);
    }
    
    /**
     * 添加管理菜单
     */
    public function add_admin_menu() {
        add_menu_page(
            '供应链管理',
            '供应链',
            'manage_options',
            'supply-chain',
            [$this, 'render_admin_page'],
            'dashicons-networking',
            30
        );
    }
    
    /**
     * 渲染管理页面
     */
    public function render_admin_page() {
        ?>
        <div class="wrap">
            <h1>柔性供应链微服务管理</h1>
            <div class="card">
                <h2>服务状态</h2>
                <table class="wp-list-table widefat fixed striped">
                    <thead>
                        <tr>
                            <th>服务名称</th>
                            <th>状态</th>
                            <th>响应时间</th>
                            <th>最后检查</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php foreach ($this->check_service_health() as $service): ?>
                        <tr>
                            <td><?php echo esc_html($service['name']); ?></td>
                            <td>
                                <span class="dashicons dashicons-<?php echo $service['status'] ? 'yes' : 'no'; ?>"></span>
                                <?php echo $service['status'] ? '正常' : '异常'; ?>
                            </td>
                            <td><?php echo esc_html($service['response_time']); ?>ms</td>
                            <td><?php echo esc_html($service['last_check']); ?></td>
                        </tr>
                        <?php endforeach; ?>
                    </tbody>
                </table>
            </div>
        </div>
        <?php
    }
    
    /**
     * 检查服务健康状态
     */
    private function check_service_health() {
        $services = [];
        
        foreach ($this->service_endpoints as $name => $endpoint) {
            $start_time = microtime(true);
            $response = wp_remote_get($endpoint . '/health', ['timeout' => 5]);
            $response_time = round((microtime(true) - $start_time) * 1000, 2);
            
            $services[] = [
                'name' => ucfirst($name) . ' Service',
                'status' => !is_wp_error($response) && wp_remote_retrieve_response_code($response) === 200,
                'response_time' => $response_time,
                'last_check' => current_time('mysql')
            ];
        }
        
        return $services;
    }
}

// 初始化插件
new SupplyChain_Microservice_Integration();
?>

消息队列与事件驱动架构

RabbitMQ集成示例

<?php
/**
 * 事件驱动架构实现
 * 使用RabbitMQ进行服务间通信
 */

class EventDrivenArchitecture {
    
    private $connection;
    private $channel;
    
    public function __construct() {
        $this->init_message_queue();
    }
    
    /**
     * 初始化消息队列连接
     */
    private function init_message_queue() {
        try {
            // 创建RabbitMQ连接
            $this->connection = new AMQPConnection([
                'host' => getenv('RABBITMQ_HOST') ?: 'rabbitmq',
                'port' => getenv('RABBITMQ_PORT') ?: 5672,
                'login' => getenv('RABBITMQ_USER') ?: 'guest',
                'password' => getenv('RABBITMQ_PASS') ?: 'guest'
            ]);
            
            $this->connection->connect();
            $this->channel = new AMQPChannel($this->connection);
            
            // 声明交换机
            $this->declare_exchanges();
            
        } catch (Exception $e) {
            error_log('消息队列连接失败: ' . $e->getMessage());
        }
    }
    
    /**
     * 声明交换机
     */
    private function declare_exchanges() {
        $exchanges = [
            'inventory.events' => AMQP_EX_TYPE_DIRECT,
            'order.events' => AMQP_EX_TYPE_DIRECT,
            'supply_chain.broadcast' => AMQP_EX_TYPE_FANOUT
        ];
        
        foreach ($exchanges as $name => $type) {
            $exchange = new AMQPExchange($this->channel);
            $exchange->setName($name);
            $exchange->setType($type);
            $exchange->declare();
        }
    }
    
    /**
     * 发布事件
     */
    public function publish_event($exchange, $routing_key, $event_data) {
        try {
            $exchange_obj = new AMQPExchange($this->channel);
            $exchange_obj->setName($exchange);
            
            $message = json_encode([
                'event_id' => uniqid('event_', true),
                'event_type' => $routing_key,
                'timestamp' => time(),
                'data' => $event_data,
                'source' => 'wordpress_supply_chain'
        ]);
        
        $exchange_obj->publish(
            $message,
            $routing_key,
            AMQP_NOPARAM,
            [
                'content_type' => 'application/json',
                'delivery_mode' => AMQP_DURABLE
            ]
        );
        
        error_log("事件发布成功: {$exchange}/{$routing_key}");
        return true;
        
    } catch (Exception $e) {
        error_log("事件发布失败: " . $e->getMessage());
        return false;
    }
}

/**
 * 订阅事件
 */
public function subscribe_to_events($queue_name, $exchange, $routing_keys, $callback) {
    try {
        // 创建队列
        $queue = new AMQPQueue($this->channel);
        $queue->setName($queue_name);
        $queue->setFlags(AMQP_DURABLE);
        $queue->declare();
        
        // 绑定路由键
        if (is_array($routing_keys)) {
            foreach ($routing_keys as $routing_key) {
                $queue->bind($exchange, $routing_key);
            }
        } else {
            $queue->bind($exchange, $routing_keys);
        }
        
        // 开始消费消息
        $queue->consume(function($envelope, $queue) use ($callback) {
            $message = json_decode($envelope->getBody(), true);
            
            try {
                // 执行回调处理
                $result = call_user_func($callback, $message);
                
                if ($result) {
                    $queue->ack($envelope->getDeliveryTag());
                    error_log("事件处理成功: " . $message['event_type']);
                } else {
                    $queue->nack($envelope->getDeliveryTag());
                    error_log("事件处理失败，已拒绝: " . $message['event_type']);
                }
                
            } catch (Exception $e) {
                $queue->nack($envelope->getDeliveryTag());
                error_log("事件处理异常: " . $e->getMessage());
            }
        });
        
    } catch (Exception $e) {
        error_log("事件订阅失败: " . $e->getMessage());
    }
}

/**
 * 库存变更事件处理器
 */
public function handle_inventory_event($message) {
    $event_type = $message['event_type'];
    $data = $message['data'];
    
    switch ($event_type) {
        case 'inventory.updated':
            // 更新本地缓存
            $this->update_inventory_cache($data['product_id'], $data['new_quantity']);
            
            // 触发相关操作
            if ($data['new_quantity'] < $data['low_stock_threshold']) {
                $this->trigger_low_stock_alert($data);
            }
            break;
            
        case 'inventory.reserved':
            // 处理库存预留
            $this->update_reserved_inventory($data);
            break;
            
        case 'inventory.released':
            // 处理库存释放
            $this->release_inventory($data);
            break;
    }
    
    return true;
}

/**
 * 更新库存缓存
 */
private function update_inventory_cache($product_id, $quantity) {
    $cache_key = "inventory_{$product_id}";
    wp_cache_set($cache_key, $quantity, 'supply_chain', 3600);
}

}

// 初始化事件驱动架构
$event_system = new EventDrivenArchitecture();
?>


## 数据库设计与数据一致性

### 多服务数据同步策略

<?php
/**

  • 分布式事务管理
  • 使用Saga模式处理跨服务事务
    */

class DistributedTransactionManager {


/**
 * 创建订单Saga事务
 */
public function createOrderSaga($order_data) {
    $saga_id = uniqid('saga_', true);
    $steps = [
        'reserve_inventory' => [
            'service' => 'inventory',
            'endpoint' => '/api/inventory/reserve',
            'compensation' => '/api/inventory/release'
        ],
        'create_order' => [
            'service' => 'order',
            'endpoint' => '/api/orders',
            'compensation' => '/api/orders/cancel'
        ],
        'notify_customer' => [
            'service' => 'notification',
            'endpoint' => '/api/notifications/order-confirmation'
        ]
    ];
    
    // 执行Saga步骤
    $this->executeSagaSteps($saga_id, $steps, $order_data);
    
    return $saga_id;
}

/**
 * 执行Saga步骤
 */
private function executeSagaSteps($saga_id, $steps, $data) {
    $completed_steps = [];
    
    foreach ($steps as $step_name => $step_config) {
        try {
            // 执行步骤
            $result = $this->callMicroservice(
                $step_config['service'],
                $step_config['endpoint'],
                array_merge($data, ['saga_id' => $saga_id])
            );
            
            if (!$result['success']) {
                // 执行失败，开始补偿
                $this->compensateSteps(array_reverse($completed_steps), $data);
                throw new Exception("Saga步骤失败: {$step_name}");
            }
            
            $completed_steps[] = [
                'name' => $step_name,
                'config' => $step_config,
                'result' => $result
            ];
            
            // 记录步骤完成
            $this->logSagaStep($saga_id, $step_name, 'completed');
            
        } catch (Exception $e) {
            $this->logSagaStep($saga_id, $step_name, 'failed', $e->getMessage());
            throw $e;
        }
    }
    
    // 所有步骤完成
    $this->logSagaStep($saga_id, 'all', 'completed');
}

/**
 * 补偿已完成的步骤
 */
private function compensateSteps($steps, $data) {
    foreach ($steps as $step) {
        if (isset($step['config']['compensation'])) {
            try {
                $this->callMicroservice(
                    $step['config']['service'],
                    $step['config']['compensation'],
                    $data
                );
            } catch (Exception $e) {
                error_log("补偿步骤失败: " . $e->getMessage());
            }
        }
    }
}

/**
 * 调用微服务
 */
private function callMicroservice($service, $endpoint, $data) {
    $service_url = $this->getServiceUrl($service) . $endpoint;
    
    $response = wp_remote_post($service_url, [
        'timeout' => 30,
        'headers' => [
            'Content-Type' => 'application/json',
            'X-Saga-ID' => $data['saga_id']
        ],
        'body' => json_encode($data)
    ]);
    
    if (is_wp_error($response)) {
        throw new Exception("服务调用失败: " . $response->get_error_message());
    }
    
    return json_decode(wp_remote_retrieve_body($response), true);
}

/**
 * 记录Saga步骤
 */
private function logSagaStep($saga_id, $step, $status, $error = null) {
    global $wpdb;
    
    $wpdb->insert(
        $wpdb->prefix . 'supply_chain_saga_logs',
        [
            'saga_id' => $saga_id,
            'step' => $step,
            'status' => $status,
            'error_message' => $error,
            'created_at' => current_time('mysql')
        ]
    );
}

}

/**

  • 数据同步服务
  • 保持WordPress与微服务数据一致性
    */

class DataSynchronizationService {


/**
 * 双向同步产品数据
 */
public function syncProductData($product_id, $direction = 'both') {
    $local_data = $this->getLocalProductData($product_id);
    $remote_data = $this->getRemoteProductData($product_id);
    
    if ($direction === 'both' || $direction === 'local_to_remote') {
        // 本地到远程同步
        $this->syncToRemote($product_id, $local_data);
    }
    
    if ($direction === 'both' || $direction === 'remote_to_local') {
        // 远程到本地同步
        $this->syncToLocal($product_id, $remote_data);
    }
}

/**
 * 获取本地产品数据
 */
private function getLocalProductData($product_id) {
    $product = wc_get_product($product_id);
    
    if (!$product) {
        return null;
    }
    
    return [
        'id' => $product_id,
        'sku' => $product->get_sku(),
        'name' => $product->get_name(),
        'price' => $product->get_price(),
        'stock_quantity' => $product->get_stock_quantity(),
        'manage_stock' => $product->get_manage_stock(),
        'last_updated' => $product->get_date_modified()->format('Y-m-d H:i:s')
    ];
}

/**
 * 获取远程产品数据
 */
private function getRemoteProductData($product_id) {
    $response = wp_remote_get(
        "http://inventory-service:3000/api/products/{$product_id}",
        ['timeout' => 10]
    );
    
    if (is_wp_error($response)) {
        return null;
    }
    
    return json_decode(wp_remote_retrieve_body($response), true);
}

/**
 * 同步到远程服务
 */
private function syncToRemote($product_id, $data) {
    if (empty($data)) {
        return;
    }
    
    wp_remote_post(
        'http://inventory-service:3000/api/products/sync',
        [
            'method' => 'POST',
            'headers' => ['Content-Type' => 'application/json'],
            'body' => json_encode($data)
        ]
    );
}

/**
 * 同步到本地
 */
private function syncToLocal($product_id, $data) {
    if (empty($data)) {
        return;
    }
    
    $product = wc_get_product($product_id);
    
    if ($product && isset($data['stock_quantity'])) {
        // 更新库存数量
        wc_update_product_stock($product_id, $data['stock_quantity']);
        
        // 更新最后同步时间
        update_post_meta($product_id, '_last_sync_time', current_time('mysql'));
    }
}

/**
 * 批量同步
 */
public function batchSync($product_ids) {
    $results = [];
    
    foreach ($product_ids as $product_id) {
        try {
            $this->syncProductData($product_id, 'both');
            $results[$product_id] = 'success';
        } catch (Exception $e) {
            $results[$product_id] = 'failed: ' . $e->getMessage();
        }
    }
    
    return $results;
}

}
?>


## 监控与日志系统

### 分布式追踪实现

<?php
/**

  • 分布式追踪系统
  • 用于监控微服务调用链
    */

class DistributedTracing {


private static $instance;
private $current_trace_id;
private $current_span_id;

public static function getInstance() {
    if (self::$instance === null) {
        self::$instance = new self();
    }
    return self::$instance;
}

/**
 * 开始新的追踪
 */
public function startTrace($name) {
    $this->current_trace_id = $this->generateTraceId();
    $this->current_span_id = $this->generateSpanId();
    
    $this->logSpan([
        'trace_id' => $this->current_trace_id,
        'span_id' => $this->current_span_id,
        'parent_span_id' => null,
        'name' => $name,
        'start_time' => microtime(true),
        'service' => 'wordpress',
        'type' => 'entry'
    ]);
    
    return [
        'trace_id' => $this->current_trace_id,
        'span_id' => $this->current_span_id
    ];
}

/**
 * 创建子跨度
 */
public function createChildSpan($name, $service = null) {
    $parent_span_id = $this->current_span_id;
    $this->current_span_id = $this->generateSpanId();
    
    $span_data = [
        'trace_id' => $this->current_trace_id,
        'span_id' => $this->current_span_id,
        'parent_span_id' => $parent_span_id,
        'name' => $name,
        'start_time' => microtime(true),
        'service' => $service ?: 'wordpress',
        'type' => 'internal'
    ];
    
    $this->logSpan($span_data);
    
    return $this->current_span_id;
}

/**
 * 结束当前跨度
 */
public function endCurrentSpan($tags = []) {
    $this->logSpanEnd($this->current_span_id, $tags);
}

/**
 * 记录微服务调用
 */
public function logServiceCall($service, $endpoint, $duration, $status) {
    $span_id = $this->createChildSpan("call:{$service}:{$endpoint}", $service);
    
    $this->logSpanEnd($span_id, [
        'service' => $service,
        'endpoint' => $endpoint,
        'duration_ms' => $duration * 1000,
        'status' => $status,
        'http_method' => 'POST'
    ]);
}

/**
 * 生成追踪ID
 */
private function generateTraceId() {
    return bin2hex(random_bytes(16));
}

/**
 * 生成跨度ID
 */
private function generateSpanId() {
    return bin2hex(random_bytes(8));
}

/**
 * 记录跨度开始
 */
private function logSpan($span_data) {
    // 发送到追踪系统（如Jaeger）
    $this->sendToCollector('span_start', $span_data);
    
    // 本地日志
    error_log(json_encode([
        'type' => 'trace_span_start',
        'data' => $span_data,
        'timestamp' => date('Y-m-d H:i:s')
    ]));
}

/**
 * 记录跨度结束
 */
private function logSpanEnd($span_id, $tags) {
    $span_data = [
        'span_id' => $span_id,
        'end_time' => microtime(true),
        'tags' => $tags
    ];
    
    $this->sendToCollector('span_end', $span_data);
}

/**
 * 发送到收集器
 */
private function sendToCollector($type, $data) {
    // 实际实现中应该发送到Jaeger或Zipkin
    $collector_url = getenv('TRACING_COLLECTOR_URL') ?: 'http://jaeger:14268/api/traces';
    
    wp_remote_post($collector_url, [
        'timeout' => 2,
        'blocking' => false,
        'headers' => ['Content-Type' => 'application/json'],
        'body' => json_encode([
            'type' => $type,
            'data' => $data,
            'timestamp' => time()
        ])
    ]);
}

/**
 * 获取追踪头信息
 */
public function getTraceHeaders() {
    return [
        'X-Trace-ID' => $this->current_trace_id,
        'X-Span-ID' => $this->current_span_id,
        'X-Parent-Span-ID' => $this->getParentSpanId()
    ];
}

}

/**

  • 性能监控
    */

class PerformanceMonitor {


/**
 * 监控API响应时间
 */
public static function monitorApiCall($endpoint, $callback) {
    $start_time = microtime(true);
    
    try {
        $result = call_user_func($callback);
        $duration = microtime(true) - $start_time;
        
        // 记录成功调用
        self::logApiMetrics($endpoint, $duration, true);
        
        return $result;
        
    } catch (Exception $e) {
        $duration = microtime(true) - $start_time;
        
        // 记录失败调用
        self::logApiMetrics($endpoint, $duration, false, $e->getMessage());
        
        throw $e;
    }
}

/**
 * 记录API指标
 */
private static function logApiMetrics($endpoint, $duration, $success, $error = null) {
    global $wpdb;
    
    $wpdb->insert(
        $wpdb->prefix . 'supply_chain_metrics',
        [
            'endpoint' => $endpoint,
            'duration' => $duration,
            'success' => $success ? 1 : 0,
            'error_message' => $error,
            'timestamp' => current_time('mysql'),
            'memory_usage' => memory_get_usage(true)
        ]
    );
    
    // 发送到监控系统
    if ($duration > 1.0) { // 超过1秒的调用
        self::alertSlowCall($endpoint, $duration);
    }
}

/**
 * 慢调用告警
 */
private static function alertSlowCall($endpoint, $duration) {
    // 发送到监控系统（如Prometheus + Alertmanager）
    error_log("慢调用告警: {$endpoint} 耗时 {$duration}秒");
}

/**
 * 生成性能报告
 */
public static function generatePerformanceReport($start_date, $end_date) {
    global $wpdb;
    
    $table_name = $wpdb->prefix . 'supply_chain_metrics';
    
    $results = $wpdb->get_results($wpdb->prepare(
        "SELECT 
            endpoint,
            COUNT(*) as total_calls,
            AVG
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