feature: Metadata Mapping pattern (#1932)

* metadata-mapping * Update README.md * add class diagram * update README.md * fix identation * Update pom.xml * fix indentation * fix ci * remove e.printstack * fix ci * update class diagram * fix ci * fix ci * fix sc * fix smells * Update DatabaseUtil.java * fix coverage * Update DatabaseUtil.java * Update DatabaseUtil.java * Update DatabaseUtil.java * Update metadata-mapping/README.md Co-authored-by: Ilkka Seppälä <iluwatar@users.noreply.github.com> * fix review * fix review * Update App.java * Update App.java * fix review Co-authored-by: Ilkka Seppälä <iluwatar@users.noreply.github.com>
2022-01-02 02:46:20 +08:00
parent f670ae547b
commit 8403fdacdd
13 changed files with 661 additions and 0 deletions
--- a/metadata-mapping/src/main/java/com/iluwatar/metamapping/utils/DatabaseUtil.java
+++ b/metadata-mapping/src/main/java/com/iluwatar/metamapping/utils/DatabaseUtil.java
@ -0,0 +1,39 @@
+package com.iluwatar.metamapping.utils;
+
+import java.sql.SQLException;
+import lombok.extern.slf4j.Slf4j;
+import org.h2.jdbcx.JdbcDataSource;
+
+/**
+ * Create h2 database.
+ */
+@Slf4j
+public class DatabaseUtil {
+  private static final String DB_URL = "jdbc:h2:mem:metamapping";
+  private static final String CREATE_SCHEMA_SQL = "DROP TABLE IF EXISTS `user`;"
+      + "CREATE TABLE `user` (\n"
+      + "  `id` int(11) NOT NULL AUTO_INCREMENT,\n"
+      + "  `username` varchar(255) NOT NULL,\n"
+      + "  `password` varchar(255) NOT NULL,\n"
+      + "  PRIMARY KEY (`id`)\n"
+      + ");";
+
+  /**
+   * Hide constructor.
+   */
+  private DatabaseUtil() {}
+
+  /**
+   * Create database.
+   */
+  static {
+    LOGGER.info("create h2 database");
+    var source = new JdbcDataSource();
+    source.setURL(DB_URL);
+    try (var statement = source.getConnection().createStatement()) {
+      statement.execute(CREATE_SCHEMA_SQL);
+    } catch (SQLException e) {
+      LOGGER.error("unable to create h2 data source", e);
+    }
+  }
+}