增加StrategyContextHolder接口

discovery-plugin-strategy-starter-gateway/src/main/java/com/nepxion/discovery/plugin/strategy/gateway/context/GatewayStrategyContextHolder.java

@@ -13,13 +13,16 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.web.server.ServerWebExchange;
 
-public class GatewayStrategyContextHolder {
+import com.nepxion.discovery.plugin.strategy.context.StrategyContextHolder;
+
+public class GatewayStrategyContextHolder implements StrategyContextHolder {
     private static final Logger LOG = LoggerFactory.getLogger(GatewayStrategyContextHolder.class);
 
     public ServerWebExchange getExchange() {
         return GatewayStrategyContext.getCurrentContext().getExchange();
     }
 
+    @Override
     public String getHeader(String name) {
         ServerWebExchange exchange = getExchange();
         if (exchange == null) {

discovery-plugin-strategy-starter-service/src/main/java/com/nepxion/discovery/plugin/strategy/service/context/ServiceStrategyContextHolder.java

@@ -18,7 +18,9 @@ import org.springframework.web.context.request.RequestAttributes;
 import org.springframework.web.context.request.RequestContextHolder;
 import org.springframework.web.context.request.ServletRequestAttributes;
 
-public class ServiceStrategyContextHolder {
+import com.nepxion.discovery.plugin.strategy.context.StrategyContextHolder;
+
+public class ServiceStrategyContextHolder implements StrategyContextHolder {
     private static final Logger LOG = LoggerFactory.getLogger(ServiceStrategyContextHolder.class);
 
     public ServletRequestAttributes getRestAttributes() {
@@ -34,6 +36,7 @@ public class ServiceStrategyContextHolder {
         return RpcStrategyContext.getCurrentContext().getAttributes();
     }
 
+    @Override
     public String getHeader(String name) {
         ServletRequestAttributes attributes = getRestAttributes();
         if (attributes == null) {

discovery-plugin-strategy-starter-zuul/src/main/java/com/nepxion/discovery/plugin/strategy/zuul/context/ZuulStrategyContextHolder.java

@@ -18,9 +18,10 @@ import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.nepxion.discovery.plugin.strategy.context.StrategyContextHolder;
 import com.netflix.zuul.context.RequestContext;
 
-public class ZuulStrategyContextHolder {
+public class ZuulStrategyContextHolder implements StrategyContextHolder {
     private static final Logger LOG = LoggerFactory.getLogger(ZuulStrategyContextHolder.class);
 
     public HttpServletRequest getRequest() {
@@ -36,6 +37,7 @@ public class ZuulStrategyContextHolder {
         return RequestContext.getCurrentContext().getZuulRequestHeaders();
     }
 
+    @Override
     public String getHeader(String name) {
         HttpServletRequest request = getRequest();
         if (request == null) {

discovery-plugin-strategy/src/main/java/com/nepxion/discovery/plugin/strategy/context/StrategyContextHolder.java

+package com.nepxion.discovery.plugin.strategy.context;
+
+/**
+ * <p>Title: Nepxion Discovery</p>
+ * <p>Description: Nepxion Discovery</p>
+ * <p>Copyright: Copyright (c) 2017-2050</p>
+ * <p>Company: Nepxion</p>
+ * @author Haojun Ren
+ * @version 1.0
+ */
+
+public interface StrategyContextHolder {
+    String getHeader(String name);
+}
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