HBASE-22878 Show table throttle quotas in table jsp (#510)

hbase-client/src/main/java/org/apache/hadoop/hbase/quotas/QuotaSettingsFactory.java

@@ -123,10 +123,15 @@ public class QuotaSettingsFactory {
     return settings;
   }
 
-  protected static List<QuotaSettings> fromThrottle(final String userName,
+  public static List<ThrottleSettings> fromTableThrottles(final TableName tableName,
+      final QuotaProtos.Throttle throttle) {
+    return fromThrottle(null, tableName, null, null, throttle);
+  }
+
+  protected static List<ThrottleSettings> fromThrottle(final String userName,
       final TableName tableName, final String namespace, final String regionServer,
       final QuotaProtos.Throttle throttle) {
-    List<QuotaSettings> settings = new ArrayList<>();
+    List<ThrottleSettings> settings = new ArrayList<>();
     if (throttle.hasReqNum()) {
       settings.add(ThrottleSettings.fromTimedQuota(userName, tableName, namespace, regionServer,
         ThrottleType.REQUEST_NUMBER, throttle.getReqNum()));

hbase-server/src/main/resources/hbase-webapps/master/table.jsp

@@ -22,7 +22,6 @@
   import="static org.apache.commons.lang3.StringEscapeUtils.escapeXml"
   import="java.util.ArrayList"
   import="java.util.Collection"
-  import="java.util.Collections"
   import="java.util.LinkedHashMap"
   import="java.util.List"
   import="java.util.Map"
@@ -46,8 +45,10 @@
   import="org.apache.hadoop.hbase.client.RegionReplicaUtil"
   import="org.apache.hadoop.hbase.client.Table"
   import="org.apache.hadoop.hbase.master.HMaster"
+  import="org.apache.hadoop.hbase.quotas.QuotaSettingsFactory"
   import="org.apache.hadoop.hbase.quotas.QuotaTableUtil"
   import="org.apache.hadoop.hbase.quotas.SpaceQuotaSnapshot"
+  import="org.apache.hadoop.hbase.quotas.ThrottleSettings"
   import="org.apache.hadoop.hbase.util.Bytes"
   import="org.apache.hadoop.hbase.util.FSUtils"
   import="org.apache.hadoop.hbase.zookeeper.MetaTableLocator"
@@ -345,6 +346,40 @@ if (fqtn != null && master.isInitialized()) {
   </tr>
 <%
     }
+
+  if (quota.hasThrottle()) {
+    List<ThrottleSettings> throttles = QuotaSettingsFactory.fromTableThrottles(table.getName(), quota.getThrottle());
+    if (throttles.size() > 0) {
+%>
+  <tr>
+    <td>Throttle Quota</td>
+    <td>
+      <table>
+        <tr>
+          <th>Limit</th>
+          <th>Type</th>
+          <th>TimeUnit</th>
+          <th>Scope</th>
+        </tr>
+<%
+    for (ThrottleSettings throttle : throttles) {
+%>
+        <tr>
+          <td><%= throttle.getSoftLimit() %></td>
+          <td><%= throttle.getThrottleType() %></td>
+          <td><%= throttle.getTimeUnit() %></td>
+          <td><%= throttle.getQuotaScope() %></td>
+        </tr>
+<%
+    }
+%>
+      </table>
+    </td>
+    <td>Information about a Throttle Quota on this table, if set.</td>
+  </tr>
+<%
+    }
+  }
   }
 %>
 </table>