调度中心API服务，Client端调用逻辑优化

xxl-job-core/src/main/java/com/xxl/job/core/executor/XxlJobExecutor.java

 package com.xxl.job.core.executor;
 
+import com.xxl.job.core.biz.AdminBiz;
 import com.xxl.job.core.biz.ExecutorBiz;
 import com.xxl.job.core.biz.impl.ExecutorBizImpl;
 import com.xxl.job.core.handler.IJobHandler;
 import com.xxl.job.core.handler.annotation.JobHander;
+import com.xxl.job.core.rpc.netcom.NetComClientProxy;
 import com.xxl.job.core.rpc.netcom.NetComServerFactory;
 import com.xxl.job.core.thread.ExecutorRegistryThread;
 import com.xxl.job.core.thread.JobThread;
 import org.springframework.context.ApplicationListener;
 import org.springframework.context.event.ContextClosedEvent;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
     private String ip;
     private int port = 9999;
     private String appName;
-    public static String adminAddresses;
+    private String adminAddresses;
     public static String logPath;
 
     public void setIp(String ip) {
         this.logPath = logPath;
     }
 
+    // ---------------------------------- admin-client ------------------------------------
+    private static List<AdminBiz> adminBizList;
+    private static void initAdminBizList(String adminAddresses) throws Exception {
+        if (adminAddresses!=null && adminAddresses.trim().length()>0) {
+            for (String address: adminAddresses.trim().split(",")) {
+                if (address!=null && address.trim().length()>0) {
+                    String addressUrl = address.concat("/api");
+                    AdminBiz adminBiz = (AdminBiz) new NetComClientProxy(AdminBiz.class, addressUrl).getObject();
+                    if (adminBizList == null) {
+                        adminBizList = new ArrayList<AdminBiz>();
+                    }
+                    adminBizList.add(adminBiz);
+                }
+            }
+        }
+    }
+    public static List<AdminBiz> getAdminBizList(){
+        return adminBizList;
+    }
+
     // ---------------------------------- job server ------------------------------------
     private NetComServerFactory serverFactory = new NetComServerFactory();
     public void start() throws Exception {
+        // init admin-client
+        initAdminBizList(adminAddresses);
+
         // executor start
         NetComServerFactory.putService(ExecutorBiz.class, new ExecutorBizImpl());   // rpc-service, base on jetty
         serverFactory.start(port, ip, appName);

xxl-job-core/src/main/java/com/xxl/job/core/thread/ExecutorRegistryThread.java

 import com.xxl.job.core.biz.model.ReturnT;
 import com.xxl.job.core.enums.RegistryConfig;
 import com.xxl.job.core.executor.XxlJobExecutor;
-import com.xxl.job.core.rpc.netcom.NetComClientProxy;
 import com.xxl.job.core.util.IpUtil;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
             logger.warn(">>>>>>>>>>>> xxl-job, executor registry config fail, appName is null.");
             return;
         }
-        if (XxlJobExecutor.adminAddresses==null || XxlJobExecutor.adminAddresses.trim().length()==0) {
+        if (XxlJobExecutor.getAdminBizList() == null) {
             logger.warn(">>>>>>>>>>>> xxl-job, executor registry config fail, adminAddresses is null.");
             return;
         }
             @Override
             public void run() {
                 while (!toStop) {
-
                     try {
                         RegistryParam registryParam = new RegistryParam(RegistryConfig.RegistType.EXECUTOR.name(), appName, executorAddress);
-
-                        for (String addressUrl: XxlJobExecutor.adminAddresses.split(",")) {
-                            String apiUrl = addressUrl.concat("/api");
-
+                        for (AdminBiz adminBiz: XxlJobExecutor.getAdminBizList()) {
                             try {
-                                AdminBiz adminBiz = (AdminBiz) new NetComClientProxy(AdminBiz.class, apiUrl).getObject();
                                 ReturnT<String> registryResult = adminBiz.registry(registryParam);
                                 if (registryResult!=null && ReturnT.SUCCESS_CODE == registryResult.getCode()) {
                                     registryResult = ReturnT.SUCCESS;
                             }
 
                         }
-
                     } catch (Exception e) {
                         logger.error(e.getMessage(), e);
                     }

xxl-job-core/src/main/java/com/xxl/job/core/thread/TriggerCallbackThread.java

 import com.xxl.job.core.biz.model.HandleCallbackParam;
 import com.xxl.job.core.biz.model.ReturnT;
 import com.xxl.job.core.executor.XxlJobExecutor;
-import com.xxl.job.core.rpc.netcom.NetComClientProxy;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
                             callbackParamList.add(callback);
 
                             // valid
-                            if (XxlJobExecutor.adminAddresses==null || XxlJobExecutor.adminAddresses.trim().length()==0) {
+                            if (XxlJobExecutor.getAdminBizList()==null) {
                                 logger.warn(">>>>>>>>>>>> xxl-job callback fail, adminAddresses is null, callbackParamList：{}", callbackParamList);
                                 continue;
                             }
 
                             // callback, will retry if error
-                            for (String addressUrl: XxlJobExecutor.adminAddresses.split(",")) {
-                                String apiUrl = addressUrl.concat("/api");
-
+                            for (AdminBiz adminBiz: XxlJobExecutor.getAdminBizList()) {
                                 try {
-                                    AdminBiz adminBiz = (AdminBiz) new NetComClientProxy(AdminBiz.class, apiUrl).getObject();
                                     ReturnT<String> callbackResult = adminBiz.callback(callbackParamList);
                                     if (callbackResult!=null && ReturnT.SUCCESS_CODE == callbackResult.getCode()) {
                                         callbackResult = ReturnT.SUCCESS;