optimize: fix StyleCheck errors for hippo4j-threadpool-coore (#1294)

* optimize: fix StyleCheck errors for hippo4j-threadpool-coore

* optimize: fix StyleCheck errors for hippo4j-threadpool-coore

checkstyle/hippo4j_checkstyle_suppression.xml

@@ -32,4 +32,5 @@
     <suppress checks="TypeName" files="SpringBootConfig.java"/>
     <suppress checks="ReturnCount" files="Hippo4jAgent.java"/>
     <suppress checks="StaticVariableName" files="Hippo4jAgent.java"/>
+    <suppress checks="StaticVariableName" files="ExtensionRegistry.java"/>
 </suppressions>

threadpool/core/src/main/java/cn/hippo4j/core/extension/annotation/Realization.java

@@ -25,6 +25,9 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
+/**
+ * realization
+ */
 @Inherited
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE})

threadpool/core/src/main/java/cn/hippo4j/core/extension/reducer/None.java

@@ -22,6 +22,10 @@ import cn.hippo4j.core.extension.support.ReduceType;
 import java.util.List;
 import java.util.stream.Collectors;
 
+/**
+ * None extends
+ * @param <Element>
+ */
 public class None<Element> extends Reducer<Element, List<Element>> {
 
     @Override

threadpool/core/src/main/java/cn/hippo4j/core/extension/reducer/Reducer.java

@@ -26,6 +26,11 @@ import lombok.Setter;
 
 import java.util.List;
 
+/**
+ * reducer
+ * @param <Element>
+ * @param <Result>
+ */
 public abstract class Reducer<Element, Result> {
 
     @Getter

threadpool/core/src/main/java/cn/hippo4j/core/extension/reducer/Reducers.java

@@ -23,6 +23,9 @@ import java.util.List;
 import java.util.Objects;
 import java.util.function.Predicate;
 
+/**
+ * reducers
+ */
 @SuppressWarnings("all")
 public class Reducers {
 

threadpool/core/src/main/java/cn/hippo4j/core/extension/support/ExtensionAutoConfiguration.java

@@ -21,6 +21,9 @@ import cn.hippo4j.core.extension.config.ExtensionRegisterBootstrap;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
+/**
+ * extension auto  configuration
+ */
 @Configuration
 public class ExtensionAutoConfiguration {
 

threadpool/core/src/main/java/cn/hippo4j/core/extension/support/ExtensionRegistry.java

@@ -34,7 +34,7 @@ import java.util.concurrent.ConcurrentHashMap;
  * Extension registry
  */
 @Slf4j
-public class ExtensionRegistry implements IExtensionRegistry {
+public final class ExtensionRegistry implements IExtensionRegistry {
 
     private final Map<Class<? extends IExtension>, List<IExtension>> registry = new ConcurrentHashMap<>();
 

threadpool/core/src/main/java/cn/hippo4j/core/extension/support/IExtensionRegistry.java

@@ -21,6 +21,9 @@ import cn.hippo4j.core.extension.IExtension;
 
 import java.util.List;
 
+/**
+ * extension registry interface
+ */
 public interface IExtensionRegistry {
 
     void register(IExtension realization);

threadpool/core/src/main/java/cn/hippo4j/core/extension/support/ReduceType.java

@@ -17,6 +17,9 @@
 
 package cn.hippo4j.core.extension.support;
 
+/**
+ * reduce type
+ */
 public enum ReduceType {
 
     NONE,