修正connection.id，statement.id, resultSet.id生成不正确的问题

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@227 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/main/java/com/alibaba/druid/pool/DruidDataSource.java

@@ -25,6 +25,7 @@ import java.util.List;
 import java.util.Set;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.locks.Condition;
 import java.util.concurrent.locks.ReentrantLock;
 
@@ -685,4 +686,20 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
         }
         return names;
     }
+    
+    private final AtomicLong connectionIdSeed = new AtomicLong(10000);
+    private final AtomicLong statementIdSeed  = new AtomicLong(20000);
+    private final AtomicLong resultSetIdSeed  = new AtomicLong(50000);
+
+    public long createConnectionId() {
+        return connectionIdSeed.incrementAndGet();
+    }
+
+    public long createStatementId() {
+        return statementIdSeed.getAndIncrement();
+    }
+
+    public long createResultSetId() {
+        return resultSetIdSeed.getAndIncrement();
+    }
 }