webapp add sessionCount

src/main/java/com/alibaba/druid/support/http/WebStatFilter.java

@@ -207,6 +207,7 @@ public class WebStatFilter implements Filter {
                 }
 
                 webAppStat.computeUserAgent(userAgent);
+                webAppStat.incrementSessionCount();
             }
 
             sessionStat.setUserAgent(userAgent);

src/main/java/com/alibaba/druid/support/http/stat/WebAppStat.java

@@ -46,6 +46,7 @@ public class WebAppStat {
     private final AtomicInteger                     runningCount                   = new AtomicInteger();
     private final AtomicInteger                     concurrentMax                  = new AtomicInteger();
     private final AtomicLong                        requestCount                   = new AtomicLong(0);
+    private final AtomicLong                        sessionCount                   = new AtomicLong(0);
 
     private final AtomicLong                        jdbcFetchRowCount              = new AtomicLong();
     private final AtomicLong                        jdbcUpdateCount                = new AtomicLong();
@@ -130,6 +131,7 @@ public class WebAppStat {
         concurrentMax.set(0);
         requestCount.set(0);
         requestCount.set(0);
+        sessionCount.set(0);
         
         jdbcFetchRowCount.set(0);
         jdbcUpdateCount.set(0);
@@ -356,6 +358,14 @@ public class WebAppStat {
         }
     }
     
+    public void incrementSessionCount() {
+        sessionCount.incrementAndGet();
+    }
+    
+    public long getSessionCount() {
+        return sessionCount.get();
+    }
+    
     public void addJdbcFetchRowCount(long delta) {
         this.jdbcFetchRowCount.addAndGet(delta);
     }
@@ -455,6 +465,7 @@ public class WebAppStat {
         data.put("RunningCount", this.getRunningCount());
         data.put("ConcurrentMax", this.getConcurrentMax());
         data.put("RequestCount", this.getRequestCount());
+        data.put("SessionCount", this.getSessionCount());
         
         data.put("JdbcCommitCount", this.getJdbcCommitCount());
         data.put("JdbcRollbackCount", this.getJdbcRollbackCount());

src/main/resources/support/http/resources/webapp.html

@@ -28,6 +28,7 @@
 				            "RunningCount", 
 				            "ConcurrentMax", 
 				            "RequestCount",
+				            "SessionCount",
 				            
 				            "JdbcCommitCount", 
 				            "JdbcRollbackCount",