From 99a00ba72b53d6f740899ddb76c858b8f99683ac Mon Sep 17 00:00:00 2001
From: jingui123 <583789457@qq.com>
Date: Tue, 30 Oct 2018 10:24:45 +0800
Subject: [PATCH] Optimize REGISTRIES field in AbstractRegistryFactory. (#2703)
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* modify ConcurrentHashMap to HashMap.这里REGISTRIES在使用的时候都会先加锁，不存在多线程安全的问题。所以这里建议使用hashmap

* modify ConcurrentHashMap to HashMap.这里REGISTRIES在使用的时候都会先加锁，不存在多线程安全的问题。所以这里建议使用hashmap
---
 .../dubbo/registry/support/AbstractRegistryFactory.java       | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/support/AbstractRegistryFactory.java b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/support/AbstractRegistryFactory.java
index 8347d9a687f..64647f4ba60 100644
--- a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/support/AbstractRegistryFactory.java
+++ b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/support/AbstractRegistryFactory.java
@@ -26,8 +26,8 @@
 
 import java.util.Collection;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.locks.ReentrantLock;
 
 /**
@@ -44,7 +44,7 @@ public abstract class AbstractRegistryFactory implements RegistryFactory {
     private static final ReentrantLock LOCK = new ReentrantLock();
 
     // Registry Collection Map<RegistryAddress, Registry>
-    private static final Map<String, Registry> REGISTRIES = new ConcurrentHashMap<String, Registry>();
+    private static final Map<String, Registry> REGISTRIES = new HashMap<>();
 
     /**
      * Get all registries