SOA2

ServiceGateway.java

@@ -0,0 +1,65 @@
+package com.soa.gateway;
+
+import com.soa.bus.ServiceBus;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+/**
+ * 服务网关 - 负责请求的路由、认证、限流等
+ */
+public class ServiceGateway {
+    private static final Logger logger = LogManager.getLogger(ServiceGateway.class);
+    private final ServiceBus serviceBus;
+    
+    public ServiceGateway() {
+        this.serviceBus = ServiceBus.getInstance();
+    }
+    
+    /**
+     * 处理请求
+     */
+    public String handleRequest(String serviceName, String request, String apiKey) {
+        // 1. 验证API Key
+        if (!validateApiKey(apiKey)) {
+            logger.warn("Invalid API Key: {}", apiKey);
+            return "Error: Unauthorized access - Invalid API Key";
+        }
+        
+        // 2. 日志请求
+        logger.info("Request received for service: {}, with API Key ending in: {}", 
+                serviceName, apiKey.substring(apiKey.length() - 4));
+        
+        // 3. 检查限流（简单实现）
+        if (!checkRateLimit(apiKey)) {
+            logger.warn("Rate limit exceeded for API Key: {}", apiKey);
+            return "Error: Rate limit exceeded";
+        }
+        
+        // 4. 路由到服务总线
+        return serviceBus.callService(serviceName, request);
+    }
+    
+    /**
+     * 验证API Key
+     */
+    private boolean validateApiKey(String apiKey) {
+        // 简化实现 - 实际应该从数据库或配置中验证
+        return apiKey != null && apiKey.startsWith("valid_");
+    }
+    
+    /**
+     * 检查限流
+     */
+    private boolean checkRateLimit(String apiKey) {
+        // 简化实现 - 实际应该使用令牌桶或漏桶算法
+        return true;
+    }
+    
+    /**
+     * 获取服务状态
+     */
+    public String getServiceStatus(String serviceName) {
+        boolean available = serviceBus.isServiceAvailable(serviceName);
+        return "Service: " + serviceName + " - Status: " + (available ? "Available" : "Unavailable");
+    }
+}