update bugfix NullPointerException

hippo4j-spring-boot/hippo4j-core-spring-boot-starter/src/main/java/cn/hippo4j/core/starter/config/ExecutorProperties.java

@@ -1,9 +1,12 @@
 package cn.hippo4j.core.starter.config;
 
 import cn.hippo4j.common.notify.ThreadPoolNotifyAlarm;
+import com.google.common.collect.Maps;
 import lombok.Data;
 import lombok.experimental.Accessors;
 
+import java.util.Map;
+
 /**
  * Executor properties.
  *
@@ -69,4 +72,8 @@ public class ExecutorProperties {
      */
     private ThreadPoolNotifyAlarm notify;
 
+    public Map<String, String> receives() {
+        return this.notify.getReceives() == null ? Maps.newHashMap() : this.notify.getReceives();
+    }
+
 }

hippo4j-spring-boot/hippo4j-core-spring-boot-starter/src/main/java/cn/hippo4j/core/starter/notify/CoreNotifyConfigBuilder.java

@@ -3,6 +3,7 @@ package cn.hippo4j.core.starter.notify;
 import cn.hippo4j.common.api.NotifyConfigBuilder;
 import cn.hippo4j.common.notify.AlarmControlHandler;
 import cn.hippo4j.common.notify.NotifyConfigDTO;
+import cn.hippo4j.common.toolkit.CollectionUtil;
 import cn.hippo4j.core.starter.config.BootstrapCoreProperties;
 import cn.hippo4j.core.starter.config.ExecutorProperties;
 import cn.hippo4j.core.starter.config.NotifyPlatformProperties;
@@ -100,14 +101,14 @@ public class CoreNotifyConfigBuilder implements NotifyConfigBuilder {
             if (StrUtil.isBlank(receive)) {
                 receive = bootstrapCoreProperties.getReceive();
                 if (StrUtil.isBlank(receive)) {
-                    Map<String, String> receives = executor.getNotify().getReceives();
+                    Map<String, String> receives = executor.receives();
                     receive = receives.get(platformProperties.getPlatform());
                 }
             }
         } else {
             receive = bootstrapCoreProperties.getReceive();
             if (StrUtil.isBlank(receive)) {
-                Map<String, String> receives = executor.getNotify().getReceives();
+                Map<String, String> receives = executor.receives();
                 receive = receives.get(platformProperties.getPlatform());
             }
         }

hippo4j-spring-boot/hippo4j-core-spring-boot-starter/src/main/java/cn/hippo4j/core/starter/refresher/AbstractCoreThreadPoolDynamicRefresh.java

@@ -89,7 +89,7 @@ public abstract class AbstractCoreThreadPoolDynamicRefresh implements ThreadPool
             );
 
             threadPoolNotifyAlarm.setInterval(executorProperties.getNotify().getInterval());
-            threadPoolNotifyAlarm.setReceives(executorProperties.getNotify().getReceives());
+            threadPoolNotifyAlarm.setReceives(executorProperties.receives());
             GlobalNotifyAlarmManage.put(executorProperties.getThreadPoolId(), threadPoolNotifyAlarm);
         });
     }