添加监控

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@902 b9813039-fb51-4c41-a8b9-e21c2acb5095

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

@@ -87,6 +87,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
     private int                     poolingCount            = 0;
     private int                     activeCount             = 0;
     private int                     notEmptyWaitThreadCount = 0;
+    private int                     activePeak              = 0;
 
     // threads
     private CreateConnectionThread  createConnectionThread;
@@ -126,6 +127,8 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
             notEmptyWaitCount = 0;
             notEmptySignalCount = 0L;
             notEmptyWaitNanos = 0;
+            
+            activePeak = 0;
         } finally {
             lock.unlock();
         }
@@ -412,6 +415,9 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
 
             holder.incrementUseCount();
             activeCount++;
+            if (activeCount > activePeak) {
+                activePeak = activeCount;
+            }
 
             poolalbeConnection = new PoolableConnection(holder);
         } catch (InterruptedException e) {
@@ -1038,6 +1044,10 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
     public int getLockQueueLength() {
         return lock.getQueueLength();
     }
+    
+    public int getActivePeak() {
+        return activePeak;
+    }
 
     public String dump() {
         lock.lock();

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

@@ -51,5 +51,5 @@ public interface DruidDataSourceMBean extends DruidAbstractDataSourceMBean {
 
     String getVersion();
 
-
+    int getActivePeak();
 }