feat: keepalive on mysql/postgre connections, should fix #577

src/main/libs/clients/MySQLClient.ts

@@ -9,6 +9,8 @@ export class MySQLClient extends AntaresCore {
    private _schema?: string;
    private _runningConnections: Map<string, number>;
    private _connectionsToCommit: Map<string, mysql.Connection | mysql.PoolConnection>;
+   private _keepaliveTimer: NodeJS.Timer;
+   private _keepaliveMs: number;
    _connection?: mysql.Connection | mysql.Pool;
    _params: mysql.ConnectionOptions & {schema: string; ssl?: mysql.SslOptions; ssh?: SSHConfig; readonly: boolean};
 
@@ -52,6 +54,7 @@ export class MySQLClient extends AntaresCore {
       this._schema = null;
       this._runningConnections = new Map();
       this._connectionsToCommit = new Map();
+      this._keepaliveMs = 10*60*1000;
    }
 
    private _getType (field: mysql.FieldPacket & { columnType?: number; columnLength?: number }) {
@@ -182,6 +185,8 @@ export class MySQLClient extends AntaresCore {
 
    destroy () {
       this._connection.end();
+      clearInterval(this._keepaliveTimer);
+      this._keepaliveTimer = undefined;
       if (this._ssh) this._ssh.close();
    }
 
@@ -243,9 +248,19 @@ export class MySQLClient extends AntaresCore {
             conn.query(`SET SESSION sql_mode = '${sqlMode.filter((m: string) => !['ANSI', 'ANSI_QUOTES'].includes(m)).join(',')}'`);
       });
 
+      this._keepaliveTimer = setInterval(async () => {
+         await this.keepAlive();
+      }, this._keepaliveMs);
+
       return connection;
    }
 
+   private async keepAlive () {
+      const connection = await (this._connection as mysql.Pool).getConnection();
+      await connection.ping();
+      connection.release();
+   }
+
    use (schema: string) {
       this._schema = schema;
       return this.raw(`USE \`${schema}\``);

src/main/libs/clients/PostgreSQLClient.ts

@@ -84,6 +84,8 @@ export class PostgreSQLClient extends AntaresCore {
    private _schema?: string;
    private _runningConnections: Map<string, number>;
    private _connectionsToCommit: Map<string, pg.Client | pg.PoolClient>;
+   private _keepaliveTimer: NodeJS.Timer;
+   private _keepaliveMs: number;
    protected _connection?: pg.Client | pg.Pool;
    private types: {[key: string]: string} = {};
    private _arrayTypes: {[key: string]: string} = {
@@ -104,6 +106,7 @@ export class PostgreSQLClient extends AntaresCore {
       this._schema = null;
       this._runningConnections = new Map();
       this._connectionsToCommit = new Map();
+      this._keepaliveMs = 10*60*1000;
 
       for (const key in pg.types.builtins) {
          const builtinKey = key as builtinsTypes;
@@ -222,14 +225,26 @@ export class PostgreSQLClient extends AntaresCore {
          });
       }
 
+      this._keepaliveTimer = setInterval(async () => {
+         await this.keepAlive();
+      }, this._keepaliveMs);
+
       return connection;
    }
 
    destroy () {
       this._connection.end();
+      clearInterval(this._keepaliveTimer);
+      this._keepaliveTimer = undefined;
       if (this._ssh) this._ssh.close();
    }
 
+   private async keepAlive () {
+      const connection = await this._connection.connect() as pg.PoolClient;
+      await connection.query('SELECT 1+1');
+      connection.release();
+   }
+
    use (schema: string, connection?: pg.Client | pg.PoolClient) {
       this._schema = schema;
 

src/renderer/components/WorkspaceAddConnectionPanel.vue

@@ -416,7 +416,7 @@ const clients = [
    { name: 'MariaDB', slug: 'maria' },
    { name: 'PostgreSQL', slug: 'pg' },
    { name: 'SQLite', slug: 'sqlite' },
-   { name: 'Firebird SQL (experimental)', slug: 'firebird' }
+   { name: 'Firebird SQL', slug: 'firebird' }
 ];
 
 const connection = ref({

src/renderer/components/WorkspaceEditConnectionPanel.vue

@@ -429,7 +429,7 @@ const clients = [
    { name: 'MariaDB', slug: 'maria' },
    { name: 'PostgreSQL', slug: 'pg' },
    { name: 'SQLite', slug: 'sqlite' },
-   { name: 'Firebird SQL (experimental)', slug: 'firebird' }
+   { name: 'Firebird SQL', slug: 'firebird' }
 ];
 
 const firstInput: Ref<HTMLInputElement> = ref(null);

src/renderer/i18n/it-IT.ts

@@ -22,7 +22,7 @@ export const itIT = {
       settings: 'Impostazioni',
       general: 'Generale',
       themes: 'Temi',
-      update: 'Aggiornamento',
+      update: 'Aggiorna',
       about: 'Informazioni',
       language: 'Lingua',
       version: 'Versione',
@@ -337,7 +337,7 @@ export const itIT = {
       executeSelectedQuery: 'Esegui la query selezionata',
       defaultCopyType: 'Tipo di copia default',
       showTableSize: 'Mostra dimensioni tabella nella sidebar',
-      showTableSizeDescription: 'Solo MySQL/MariaDB. Abilitare questa opzione può compmpromettere le performance in schemi con molte tabelle.',
+      showTableSizeDescription: 'Solo MySQL/MariaDB. Abilitare questa opzione può compromettere le performance in schemi con molte tabelle.',
       searchForSchemas: 'Cerca schemi',
       switchSearchMethod: 'Cambia metodo di ricerca',
       noResultsPresent: 'Nessun risultato presente'