http api monitor command return timestamp. close #2320

core/src/main/java/com/taobao/arthas/core/command/monitor200/MonitorAdviceListener.java

@@ -160,6 +160,7 @@ class MonitorAdviceListener extends AdviceListenerAdapter {
                 MonitorData oData = value.get();
                 MonitorData nData = new MonitorData();
                 nData.setCost(oData.getCost() + cost);
+                nData.setTimestamp(new Date());
                 if (isThrowing) {
                     nData.setFailed(oData.getFailed() + 1);
                     nData.setSuccess(oData.getSuccess());

core/src/main/java/com/taobao/arthas/core/command/monitor200/MonitorData.java

@@ -1,5 +1,7 @@
 package com.taobao.arthas.core.command.monitor200;
 
+import java.util.Date;
+
 /**
  * 数据监控用的value for MonitorCommand
  *
@@ -12,6 +14,7 @@ public class MonitorData {
     private int success;
     private int failed;
     private double cost;
+    private Date timestamp;
 
     public String getClassName() {
         return className;
@@ -60,4 +63,15 @@ public class MonitorData {
     public void setCost(double cost) {
         this.cost = cost;
     }
+
+    public Date getTimestamp() {
+        if (timestamp == null) {
+            timestamp = new Date();
+        }
+        return timestamp;
+    }
+
+    public void setTimestamp(Date timestamp) {
+        this.timestamp = timestamp;
+    }
 }

core/src/main/java/com/taobao/arthas/core/command/view/MonitorView.java

@@ -9,7 +9,6 @@ import com.taobao.text.util.RenderUtil;
 
 import java.text.DecimalFormat;
 import java.text.SimpleDateFormat;
-import java.util.Date;
 
 import static com.taobao.text.ui.Element.label;
 
@@ -34,7 +33,7 @@ public class MonitorView extends ResultView<MonitorModel> {
 
         for (MonitorData data : result.getMonitorDataList()) {
             table.row(
-                    new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()),
+                    new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(data.getTimestamp()),
                     data.getClassName(),
                     data.getMethodName(),
                     "" + data.getTotal(),