Re-add thread-pool-size config option, fixes #19

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.btk5h</groupId>
     <artifactId>skript-db</artifactId>
-    <version>1.3.8</version>
+    <version>1.3.9</version>
     <packaging>jar</packaging>
 
     <repositories>

src/main/java/com/btk5h/skriptdb/SkriptDB.java

@@ -73,6 +73,10 @@ public final class SkriptDB extends JavaPlugin {
       }
       try {
         if (out == null) return;
+
+        out.write("# How many connections can be awaited for simultaneously, may be useful to increase if SQL database is hosted on a separate machine to account for ping.\n");
+        out.write("# If it is hosted within the same machine, set it to the count of cores your processor has or the count of threads your processor can process at once.\n");
+        out.write("thread-pool-size: " + (Runtime.getRuntime().availableProcessors() + 2) + "\n");
         out.write("# Only change this if you wish to use a different driver than Java's default, like MariaDB driver.\n");
         out.write("# If you use MariaDB, its driver is shaded together with skript-db, so you can just specify:" + "\"org.mariadb.jdbc.Driver\"" + ".\n");
         out.write("sql-driver-class-name: " + "\"default\"" + "\n");

src/main/java/com/btk5h/skriptdb/skript/EffExecuteStatement.java

@@ -44,8 +44,7 @@ import java.util.concurrent.Executors;
  * @since 0.1.0
  */
 public class EffExecuteStatement extends Effect {
-    private static final ExecutorService threadPool =
-            Executors.newCachedThreadPool();
+    private static final ExecutorService threadPool = Executors.newFixedThreadPool(SkriptDB.getInstance().getConfig().getInt("thread-pool-size", 10));
     static String lastError;
 
     static {

src/main/java/com/btk5h/skriptdb/skript/ExprDataSource.java

@@ -55,7 +55,7 @@ public class ExprDataSource extends SimpleExpression<HikariDataSource> {
         }
 
         HikariDataSource ds = new HikariDataSource();
-
+        ds.setMaximumPoolSize(SkriptDB.getInstance().getConfig().getInt("thread-pool-size", 10));
         //allow specifying of own sql driver class name
         if (!SkriptDB.getInstance().getConfig().getString("sql-driver-class-name", "default").equals("default")) {
             ds.setDriverClassName(SkriptDB.getInstance().getConfig().getString("sql-driver-class-name"));

src/main/resources/plugin.yml

@@ -1,5 +1,5 @@
 name: skript-db
-version: 1.3.5
+version: 1.3.9
 main: com.btk5h.skriptdb.SkriptDB
 depend: [Skript]
 authors: [btk5h, FranKusmiruk, Govindas, TPGamesNL]