Add init db and sample data

src/main/java/com/example/demo/MainApplication.java

@@ -1,15 +1,66 @@
 package com.example.demo;
 
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.sql.Connection;
+
+import javax.sql.DataSource;
+
+import org.apache.ibatis.io.Resources;
+import org.apache.ibatis.jdbc.ScriptRunner;
 import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.context.event.EventListener;
+
+import jakarta.annotation.PostConstruct;
 
 @SpringBootApplication
 @MapperScan("com.example.demo.repository")
 public class MainApplication {
 
+	@Autowired
+	private DataSource dataSource;
+
 	public static void main(String[] args) {
 		SpringApplication.run(MainApplication.class, args);
 	}
 
+	@PostConstruct
+	public void runSqlScript() throws Exception {
+		// It is not working in in-memory SQLite
+		this.initDatabaseAndInsertSampleData();
+	}
+
+	/**
+	 * 
+	 */
+	@EventListener(ApplicationReadyEvent.class)
+	public void doSomethingAfterStartup() {
+		System.out.println("hello world, I have just started up");
+
+	}
+
+	private void initDatabaseAndInsertSampleData() throws Exception {
+
+		// Database initialization
+		Connection conn = dataSource.getConnection();
+		ScriptRunner runner = new ScriptRunner(conn);
+		runner.setStopOnError(true);
+		runner.setEscapeProcessing(false); // Important!
+		// runner.setSendFullScript(false);
+		runner.setAutoCommit(true);
+
+		// Init schemas
+		Reader schema = Resources.getResourceAsReader("sqlite/schema.sql");
+		runner.runScript(schema);
+
+		// Insert sample data
+		Reader sampledata = Resources.getResourceAsReader("sqlite/create-sample-data.sql");
+		runner.runScript(sampledata);
+
+	}
 }

src/main/resources/application.properties

@@ -4,7 +4,10 @@
 spring.datasource.url=jdbc:sqlite:data/mainapp.sqlite3
 
 # Datasource URL used by @Repository, the db use in-memory
+# NOTE: Not working, have no idea why
 # spring.datasource.url=jdbc:sqlite::memory:
+# spring.datasource.hikari.maximum-pool-size=1
+# spring.datasource.hikari.max-lifetime=0
 
 spring.datasource.driver-class-name=org.sqlite.JDBC
 # spring.datasource.username=
@@ -13,6 +16,7 @@ spring.datasource.driver-class-name=org.sqlite.JDBC
 ## MyBatis related:
 # mybatis.check-config-location=true
 mybatis.config-location=classpath:mybatis/mybatis-config.xml
+mybatis.mapper-locations=classpath:com/example/demo/repository/*.xml
 
 ## ----- Logger configuration -----
 logging.level.org.mybatis=DEBUG

src/main/resources/sqlite/create-sample-data.sql

@@ -1,3 +1,4 @@
 -- Insert the sample data for users table:
-INSERT INTO users (name,password) VALUES ( 'admin', '1234' );
-INSERT INTO users (name,password) VALUES ( 'badbuta', 'abcd' );
+-- MD5 of '1234' = 81dc9bdb52d04dc20036dbd8313ed055
+INSERT INTO users (name,password) SELECT 'admin', '81dc9bdb52d04dc20036dbd8313ed055' WHERE NOT EXISTS(SELECT 1 FROM users WHERE name = 'admin');
+INSERT INTO users (name,password) SELECT 'tester', '81dc9bdb52d04dc20036dbd8313ed055' WHERE NOT EXISTS(SELECT 1 FROM users WHERE name = 'tester');

src/main/resources/sqlite/schema.sql

@@ -1,6 +1,6 @@
 -- Users table
-CREATE TABLE users(
+CREATE TABLE IF NOT EXISTS users(
     id          INTEGER PRIMARY KEY AUTOINCREMENT,
-    name        VARCHAR NOT NULL,
-    password    VARCHAR   -- Clear-text pwd
+    name        TEXT NOT NULL,
+    password    TEXT   -- Clear-text pwd
 );