Simplified thread pool creation (#756)

* Simplified thread pool creation

* update method name

hippo4j-core/src/main/java/cn/hippo4j/core/executor/support/ThreadPoolBuilder.java

@@ -17,14 +17,19 @@
 
 package cn.hippo4j.core.executor.support;
 
+import java.math.BigDecimal;
+import java.util.Optional;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.RejectedExecutionHandler;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
 import cn.hippo4j.common.design.builder.Builder;
 import cn.hippo4j.common.executor.support.BlockingQueueTypeEnum;
 import cn.hippo4j.common.toolkit.Assert;
-import org.springframework.core.task.TaskDecorator;
 
-import java.math.BigDecimal;
-import java.util.Optional;
-import java.util.concurrent.*;
+import org.springframework.core.task.TaskDecorator;
 
 /**
  * Thread-pool builder.
@@ -221,6 +226,19 @@ public class ThreadPoolBuilder implements Builder<ThreadPoolExecutor> {
         return new ThreadPoolBuilder();
     }
 
+    /**
+     * Create dynamic thread pool by thread pool id
+     * @param threadPoolId threadPoolId
+     * @return ThreadPoolExecutor
+     */
+    public static ThreadPoolExecutor builderDynamicPoolById(String threadPoolId) {
+        return ThreadPoolBuilder.builder()
+                .threadFactory(threadPoolId)
+                .threadPoolId(threadPoolId)
+                .dynamicPool()
+                .build();
+    }
+
     private static ThreadPoolExecutor buildPool(ThreadPoolBuilder builder) {
         return AbstractBuildThreadPoolTemplate.buildPool(buildInitParam(builder));
     }

hippo4j-example/hippo4j-config-etcd-spring-boot-starter-example/src/main/java/cn/hippo4j/example/config/etcd/config/ThreadPoolConfig.java

@@ -17,13 +17,14 @@
 
 package cn.hippo4j.example.config.etcd.config;
 
+import java.util.concurrent.ThreadPoolExecutor;
+
 import cn.hippo4j.core.executor.DynamicThreadPool;
 import cn.hippo4j.core.executor.support.ThreadPoolBuilder;
+
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
-import java.util.concurrent.ThreadPoolExecutor;
-
 /**
  * @author : wh
  * @date : 2022/9/2 19:26
@@ -36,11 +37,6 @@ public class ThreadPoolConfig {
     @DynamicThreadPool
     public ThreadPoolExecutor messageConsumeDynamicExecutor() {
         String threadPoolId = "message-consume";
-        ThreadPoolExecutor messageConsumeDynamicExecutor = ThreadPoolBuilder.builder()
-                .threadFactory(threadPoolId)
-                .threadPoolId(threadPoolId)
-                .dynamicPool()
-                .build();
-        return messageConsumeDynamicExecutor;
+        return ThreadPoolBuilder.builderDynamicPoolById(threadPoolId);
     }
 }