[GitHub] [cloudstack] sureshanaparti commented on a change in pull request #4438: Prometheus exporter enhancement

[GitBox <gi...@apache.org>]

sureshanaparti commented on a change in pull request #4438:
URL: https://github.com/apache/cloudstack/pull/4438#discussion_r714536656



##########
File path: engine/schema/src/main/java/com/cloud/capacity/dao/CapacityDaoImpl.java
##########
@@ -411,6 +416,41 @@ public static void setValues(PreparedStatement preparedStatement, Object... valu
 
     }
 
+    @Override
+    public Ternary<Long, Long, Long> findCapacityByZoneAndHostTag(Long zoneId, String hostTag) {
+        TransactionLegacy txn = TransactionLegacy.currentTxn();
+        PreparedStatement pstmt;
+
+        StringBuilder allocatedSql = new StringBuilder(LIST_ALLOCATED_CAPACITY_GROUP_BY_CAPACITY_AND_ZONE);
+        if (hostTag != null && ! hostTag.isEmpty()) {
+            allocatedSql.append(LEFT_JOIN_VM_TEMPLATE);
+        }
+        allocatedSql.append(WHERE_STATE_IS_NOT_DESTRUCTIVE);
+        if (zoneId != null){
+            allocatedSql.append(" AND vi.data_center_id = ?");
+        }
+        if (hostTag != null && ! hostTag.isEmpty()) {
+            allocatedSql.append(" AND (vm_template.template_tag = '").append(hostTag).append("'");
+            allocatedSql.append(" OR service_offering.host_tag = '").append(hostTag).append("')");
+        }
+        allocatedSql.append(" ) AS v GROUP BY v.data_center_id");
+
+        try {
+            // add allocated capacity of zone in result
+            pstmt = txn.prepareAutoCloseStatement(allocatedSql.toString());
+            if (zoneId != null){

Review comment:
       ```suggestion
               if (zoneId != null) {
   ```




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