QueryCounterJMX.java

/*
** Module   : QueryCounterJMX.java
** Abstract : Direct access to the query counting resource.
**
** Copyright (c) 2024, Golden Code Development Corporation.
**
** -#- -I- --Date-- ---------------------------------Description----------------------------------
** 001 ICP 20241114 Created initial version.
*/

/*
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU Affero General Public License as
** published by the Free Software Foundation, either version 3 of the
** License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU Affero General Public License for more details.
**
** You may find a copy of the GNU Affero GPL version 3 at the following
** location: https://www.gnu.org/licenses/agpl-3.0.en.html
**
** Additional terms under GNU Affero GPL version 3 section 7:
**
**   Under Section 7 of the GNU Affero GPL version 3, the following additional
**   terms apply to the works covered under the License.  These additional terms
**   are non-permissive additional terms allowed under Section 7 of the GNU
**   Affero GPL version 3 and may not be removed by you.
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*/

package com.goldencode.p2j.jmx;

import java.util.List;
import java.util.function.*;

/**
 * Direct access to the query profiling resource.
 */
public class QueryCounterJMX
{

   /** Publisher for the count configuration of a specific database */
   protected final BiConsumer<String, QueryCountConfiguration> publishConfiguration;

   /** Publisher for query count of a database */
   protected final BiConsumer<String, QueryInfo> publishCount;

   /** Consumer for the bootstrap method to register all databases */
   protected final Consumer<List<String>> publishBootstrap;

   /** Supplier for fetching the query counter configuration. */
   private final Consumer<Function<String, QueryCountConfiguration>> publishSupplier;


   /**
    * Creates instance
    *
    * @param   counter
    *          Query Counter MBean
    *
    * @return  new <code>QueryCounterJMX</code> instance
    */
   public static QueryCounterJMX getInstance(QueryCounter counter)
   {
      return new QueryCounterJMX(counter::updateConfiguration,
                                 counter::updateCount,
                                 counter::bootstrap,
                                 counter::updateSupplier);
   }

   /**
    * Constructor
    *
    * @param   publishConfiguration
    *          Publisher for the count configuration of a specific database
    * @param   publishCount
    *          Publisher for query count of a database
    * @param   publishBootstrap
    *          Publisher for bootstrap configuration of a database
    * @param   publishSupplier
    *          Publisher for the supplier.
    */
   protected QueryCounterJMX(BiConsumer<String, QueryCountConfiguration> publishConfiguration,
                             BiConsumer<String, QueryInfo> publishCount,
                             Consumer<List<String>> publishBootstrap,
                             Consumer<Function<String, QueryCountConfiguration>> publishSupplier)
   {
      this.publishConfiguration = publishConfiguration;
      this.publishCount = publishCount;
      this.publishBootstrap = publishBootstrap;
      this.publishSupplier = publishSupplier;
   }

   /**
    * Update the configuration for a database
    *
    * @param   databaseName
    *          The database name.
    * @param   config
    *          The configuration details to be applied to the database.
    */
   public void updateConfiguration(String databaseName, QueryCountConfiguration config)
   {
      publishConfiguration.accept(databaseName, config);
   }

   /**
    * Updates the count for a specific query executed on the specified database.
    *
    * @param   databaseName
    *          The name of the database on which the query was executed.
    * @param   sqlInfo
    *          The object containing SQL query information.
    */
   public <T> void updateCount(String databaseName, QueryInfo sqlInfo)
   {
      publishCount.accept(databaseName, sqlInfo);
   }

   /**
    * Registers all databases using the bootstrap method.
    *
    * @param   databases
    *          The list of database names to be registered.
    */
   public void bootstrap(List<String> databases)
   {
      publishBootstrap.accept(databases);
   }

   /**
    * Updates the supplier for initial configuration.
    *
    * @param   supplier
    *          The function to call to get the initial configuration.
    */
   public void updateSupplier(Function<String, QueryCountConfiguration> supplier)
   {
      publishSupplier.accept(supplier);
   }
}