vttranlina commented on code in PR #2190:
URL: https://github.com/apache/james-project/pull/2190#discussion_r1556900671


##########
backends-common/postgres/src/main/java/org/apache/james/backends/postgres/utils/PostgresExecutor.java:
##########
@@ -139,19 +156,21 @@ public Mono<Boolean> executeExists(Function<DSLContext, 
SelectConditionStep<?>>
     }
 
     public Mono<Integer> executeReturnAffectedRowsCount(Function<DSLContext, 
Mono<Integer>> queryFunction) {
-        return dslContext()
-            .flatMap(queryFunction)
-            .retryWhen(Retry.backoff(MAX_RETRY_ATTEMPTS, MIN_BACKOFF)
-                .filter(preparedStatementConflictException()));
+        return 
Mono.usingWhen(jamesPostgresConnectionFactory.getConnection(domain),
+            connection -> dslContext(connection)
+                .flatMap(queryFunction)
+                .retryWhen(Retry.backoff(MAX_RETRY_ATTEMPTS, MIN_BACKOFF)
+                    .filter(preparedStatementConflictException())),
+            jamesPostgresConnectionFactory::closeConnection);
     }
 
     public Mono<Connection> connection() {
-        return connection;
+        return jamesPostgresConnectionFactory.getConnection(domain);
     }
 
     @VisibleForTesting
     public Mono<Void> dispose() {
-        return connection.flatMap(con -> Mono.from(con.close()));
+        return jamesPostgresConnectionFactory.close();

Review Comment:
   Where will invoke this method?
   
   If no invoke, we will early get an error: "out of pool"



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