From 03c209b60e639d0724b6630bca34c8e5e5b174aa Mon Sep 17 00:00:00 2001
From: Taras Boychuk <tboychuk@bobocode.com>
Date: Thu, 27 Jun 2024 07:00:17 +0300
Subject: [PATCH 1/2] Task: Implement a custom Connection Pool * prep a simple
 demo

---
 lesson-demo/pom.xml                           | 10 ++++++-
 .../src/main/java/com/bobocode/DemoApp.java   | 28 ++++++++++++++++++-
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/lesson-demo/pom.xml b/lesson-demo/pom.xml
index 80b50add..dc4a73a3 100644
--- a/lesson-demo/pom.xml
+++ b/lesson-demo/pom.xml
@@ -10,5 +10,13 @@
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>lesson-demo</artifactId>
-
+    
+    <dependencies>
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.7.3</version>
+        </dependency>
+    </dependencies>
+    
 </project>
\ No newline at end of file
diff --git a/lesson-demo/src/main/java/com/bobocode/DemoApp.java b/lesson-demo/src/main/java/com/bobocode/DemoApp.java
index 21d5205b..6c256a5a 100644
--- a/lesson-demo/src/main/java/com/bobocode/DemoApp.java
+++ b/lesson-demo/src/main/java/com/bobocode/DemoApp.java
@@ -1,7 +1,33 @@
 package com.bobocode;
 
+import lombok.SneakyThrows;
+import org.postgresql.ds.PGSimpleDataSource;
+
+import javax.sql.DataSource;
+
 public class DemoApp {
+    @SneakyThrows
     public static void main(String[] args) {
-        
+        DataSource dataSource = initDb();
+        var start = System.nanoTime();
+
+        for (int i = 0; i < 20; i++) {
+            try (var connection = dataSource.getConnection()) {
+                try (var selectStatement = connection.createStatement()) {
+                    selectStatement.executeQuery("select random()"); // just to call the DB
+                }
+            }
+        }
+
+        var end = System.nanoTime();
+        System.out.println((end - start) / 1000_000 + "ms");
+    }
+
+    private static DataSource initDb() { // todo: refactor to use a custom pooled data source
+        var dataSource = new PGSimpleDataSource();
+        dataSource.setURL("jdbc:postgresql://0.tcp.eu.ngrok.io:10874/postgres");
+        dataSource.setUser("bobouser");
+        dataSource.setPassword("bobopass");
+        return dataSource;
     }
 }

From d8da3b22d0a6d09e7455af3bb8f790a7be6f79ae Mon Sep 17 00:00:00 2001
From: Taras Boychuk <tboychuk@bobocode.com>
Date: Thu, 27 Jun 2024 08:27:50 +0300
Subject: [PATCH 2/2] Task: Implement a custom Connection Pool * change address

---
 lesson-demo/pom.xml                                 | 5 +++++
 lesson-demo/src/main/java/com/bobocode/DemoApp.java | 3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lesson-demo/pom.xml b/lesson-demo/pom.xml
index dc4a73a3..cc65bf59 100644
--- a/lesson-demo/pom.xml
+++ b/lesson-demo/pom.xml
@@ -17,6 +17,11 @@
             <artifactId>postgresql</artifactId>
             <version>42.7.3</version>
         </dependency>
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-hikaricp</artifactId>
+            <version>5.4.10.Final</version>
+        </dependency>
     </dependencies>
     
 </project>
\ No newline at end of file
diff --git a/lesson-demo/src/main/java/com/bobocode/DemoApp.java b/lesson-demo/src/main/java/com/bobocode/DemoApp.java
index 6c256a5a..c2015c00 100644
--- a/lesson-demo/src/main/java/com/bobocode/DemoApp.java
+++ b/lesson-demo/src/main/java/com/bobocode/DemoApp.java
@@ -1,5 +1,6 @@
 package com.bobocode;
 
+import com.zaxxer.hikari.HikariDataSource;
 import lombok.SneakyThrows;
 import org.postgresql.ds.PGSimpleDataSource;
 
@@ -25,7 +26,7 @@ public static void main(String[] args) {
 
     private static DataSource initDb() { // todo: refactor to use a custom pooled data source
         var dataSource = new PGSimpleDataSource();
-        dataSource.setURL("jdbc:postgresql://0.tcp.eu.ngrok.io:10874/postgres");
+        dataSource.setURL("jdbc:postgresql://0.tcp.eu.ngrok.io:11708/postgres");
         dataSource.setUser("bobouser");
         dataSource.setPassword("bobopass");
         return dataSource;