Jood

What is it?

Jood is object oriented sql-database library written in Java.

Getting started

Gradle

implementation 'com.nikialeksey:jood:x.y.z'

Maven

<dependency>
  <groupId>com.nikialeksey</groupId>
  <artifactId>jood</artifactId>
  <version>x.y.z</version>
</dependency>

Where x.y.z actual version from

Connection

Connection connection = DriverManager.getConnection(...);
Db db = new JdDb(() -> connection);

For example, connect to sqlite in-memory:

Connection connection = DriverManager.getConnection(
    "jdbc:sqlite::memory:"
);
Db db = new JdDb(() -> connection);

Data source

DataSource ds = ...;
Db db = new JdDb(ds);

For example, connect to h2 in-memory through the c3p0 pooled data source:

ComboPooledDataSource ds = new ComboPooledDataSource();
ds.setJdbcUrl("jdbc:h2:mem:db_name");
Db db = new JdDb(ds);

Simple queries

Db db = ...;
db.write(new JdSql("CREATE TABLE a (n INTEGER NOT NULL)"));
db.write(new JdSql("INSERT INTO a(n) VALUES(5)"));
try (
    QueryResult qr = db.read(new JdSql("SELECT * FROM a"))
) {
    ResultSet rs = qr.rs();
    while (rs.next()) {
        String n = rs.getString("n");
    }
}

Query arguments

db.write(
    new JdSql(
        "INSERT INTO a(n) VALUES(?)",
        new IntArg(5)
    )
);

Transactions

Db db = ...;
db.run(() -> { // all changes inside will be commited after successfull execution
    db.run(() -> { // transactions could be inner
        for (int i = 0; i < 1000; i++) {
            db.write(new JdSql("INSERT INTO a(n) VALUES(1)"));
        }
    });
    for (int i = 0; i < 3000; i++) {
        db.write(new JdSql("INSERT INTO a(n) VALUES(2)"));
    }
});

Migrations

Db origin = ...;
Db db = new MigrationsDb(
    origin,
    new JdMigrations(
        new Migration() {
            @Override
            public int number() {
                return 0; // migration index
            }

            @Override
            public void execute(final Db db) throws JbException {
                db.write(
                    new JdSql(
                        "CREATE TABLE user (name TEXT NOT NULL)"
                    )
                );
            }
        },
        new Migration() {
            @Override
            public int number() {
                return 1; // migration index
            }

            @Override
            public void execute(final Db db) throws JbException {
                db.write(
                    new JdSql(
                        "ALTER TABLE user " +
                            "ADD lastname TEXT NOT NULL DEFAULT ''"
                    )
                );
            }
        }  
    ),
    2 // db version number
)

jood's People