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git-svn-id: http://code.alibabatech.com/svn/druid/trunk@672 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/main/java/com/alibaba/druid/stat/DruidDataSourceStatManager.java

@@ -0,0 +1,25 @@
+package com.alibaba.druid.stat;
+
+import java.util.Set;
+
+import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.util.ConcurrentIdentityHashMap;
+
+public class DruidDataSourceStatManager implements DruidDataSourceStatManagerMBean {
+
+    // global instances
+    private static final Object                                             PRESENT   = new Object();
+    private static final ConcurrentIdentityHashMap<DruidDataSource, Object> instances = new ConcurrentIdentityHashMap<DruidDataSource, Object>();
+
+    public static void add(DruidDataSource dataSource) {
+        instances.put(dataSource, PRESENT);
+    }
+
+    public static void remove(DruidDataSource dataSource) {
+        instances.remove(dataSource);
+    }
+
+    public static Set<DruidDataSource> getInstances() {
+        return instances.keySet();
+    }
+}