feat: 添加 SPI 机制匹配自定义线程池拒绝策略.

dynamic-threadpool-spring-boot-starter/src/main/java/io/dynamic/threadpool/starter/toolkit/thread/RejectedTypeEnum.java

@@ -3,7 +3,9 @@ package io.dynamic.threadpool.starter.toolkit.thread;
 import io.dynamic.threadpool.starter.spi.DynamicTpServiceLoader;
 import io.dynamic.threadpool.starter.spi.rejected.CustomRejectedExecutionHandler;
 
-import java.util.*;
+import java.util.Collection;
+import java.util.Objects;
+import java.util.Optional;
 import java.util.concurrent.RejectedExecutionHandler;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.stream.Stream;
@@ -61,6 +63,10 @@ public enum RejectedTypeEnum {
         this.rejectedHandler = rejectedHandler;
     }
 
+    static {
+        DynamicTpServiceLoader.register(CustomRejectedExecutionHandler.class);
+    }
+
     public static RejectedExecutionHandler createPolicy(Integer type) {
         Optional<RejectedExecutionHandler> rejectedTypeEnum = Stream.of(RejectedTypeEnum.values())
                 .filter(each -> Objects.equals(type, each.type))