From 86d35fcec83057e346e4982b5a6908f25342a392 Mon Sep 17 00:00:00 2001
From: mjkwiatkowski <mati.rewa@gmail.com>
Date: Sun, 15 Feb 2026 18:26:59 +0100
Subject: feat: opendc -> postgresql connection works

---
 .../kotlin/org/opendc/common/utils/PostgresqlDB.kt | 56 ++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 opendc-common/src/main/kotlin/org/opendc/common/utils/PostgresqlDB.kt

(limited to 'opendc-common/src/main/kotlin/org/opendc/common/utils/PostgresqlDB.kt')

diff --git a/opendc-common/src/main/kotlin/org/opendc/common/utils/PostgresqlDB.kt b/opendc-common/src/main/kotlin/org/opendc/common/utils/PostgresqlDB.kt
new file mode 100644
index 00000000..3dc7a0e4
--- /dev/null
+++ b/opendc-common/src/main/kotlin/org/opendc/common/utils/PostgresqlDB.kt
@@ -0,0 +1,56 @@
+package org.opendc.common.utils
+
+import java.sql.Connection
+import java.sql.DriverManager
+import java.sql.SQLException
+
+public class PostgresqlDB {
+    public var connection : Connection? = null
+    public var dbUrl : String = ""
+    public var user : String = ""
+    public var password : String = ""
+
+    public fun setupDatabase(address : String, port : Int, dbUser : String, dbPassword : String, db : String){
+        dbUrl = "jdbc:postgresql://$address:$port/$db"
+        user = dbUser
+        password = dbPassword
+        println(dbUrl)
+        try {
+            connection = DriverManager.getConnection(dbUrl, dbUser, dbPassword)
+        } catch (e: SQLException) {
+            print("${e.message}")
+        }
+    }
+
+    public fun create(){
+        val CREATE_TABLE = """
+            CREATE TABLE metrics (
+            id SERIAL PRIMARY KEY,
+            timestamp bigint,
+            tasksActive integer, 
+            clusterName varchar(10)); 
+        """.trimIndent()
+
+        try {
+            val conn = DriverManager.getConnection(dbUrl, user, password)
+            val st = conn.createStatement()
+            st.executeQuery(CREATE_TABLE)
+        } catch (e: SQLException){
+            println("${e.message}")
+        }
+    }
+
+    public fun clear(){
+        val DELETE_ALL_TABLES = """
+            DROP SCHEMA public CASCADE;
+            CREATE SCHEMA public;
+        """.trimIndent()
+        try {
+            val conn = DriverManager.getConnection(dbUrl, user, password)
+            val st = conn.createStatement()
+            st.executeQuery(DELETE_ALL_TABLES)
+        } catch (e: SQLException){
+            println("${e.message}")
+        }
+    }
+}
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