Extract TransientResource interface

src/Executor.php

@@ -4,7 +4,7 @@ namespace Amp\Sql;
 
 use Amp\Promise;
 
-interface Executor
+interface Executor extends TransientResource
 {
     /**
      * @param string $sql SQL query to execute.
@@ -40,18 +40,6 @@ interface Executor
      */
     public function execute(string $sql, array $params = []): Promise;
 
-    /**
-     * Indicates if the connection to the database is still alive.
-     *
-     * @return bool
-     */
-    public function isAlive(): bool;
-
-    /**
-     * @return int Timestamp of the last time this connection was used.
-     */
-    public function lastUsedAt(): int;
-
     /**
      * Closes the executor. No further queries may be performed.
      */

src/Statement.php

@@ -4,7 +4,7 @@ namespace Amp\Sql;
 
 use Amp\Promise;
 
-interface Statement
+interface Statement extends TransientResource
 {
     /**
      * @param mixed[] $params
@@ -13,18 +13,8 @@ interface Statement
      */
     public function execute(array $params = []): Promise;
 
-    /**
-     * @return bool True if the statement can still be executed, false if the connection has died.
-     */
-    public function isAlive(): bool;
-
     /**
      * @return string The SQL string used to prepare the statement.
      */
     public function getQuery(): string;
-
-    /**
-     * @return int Timestamp of when the statement was last used.
-     */
-    public function lastUsedAt(): int;
 }

src/TransientResource.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Amp\Sql;
+
+interface TransientResource
+{
+    /**
+     * Indicates if the resource is still valid.
+     *
+     * @return bool
+     */
+    public function isAlive(): bool;
+
+    /**
+     * Get the timestamp of the last usage of this resource.
+     *
+     * @return int
+     */
+    public function lastUsedAt(): int;
+}