@Test
public void shouldPersistToFile() throws IOException {
/** * WRITE DB 1 ** */
Db db = Ohm.db(DB_FILE);
Table<Person> table = db.table(Person.class);
assert 0 == table.insert(person("a", 100));
assert 1 == table.insert(person("b", 200));
for (int i = 0; i < 3; i++) {
table.set(0, "name", "x" + i);
table.set(0, "age", i);
}
table.print();
db.shutdown();
/** * READ DB 2 ** */
Db db2 = Ohm.db(DB_FILE);
Table<Person> table2 = db2.table(Person.class);
eq(table2.size(), 2);
table2.print();
/** * WRITE DB 2 ** */
long id2 = table2.insert(person("c", 300));
eq(id2, 2L);
eq(table2.size(), 3);
table2.set(0, "name", "x");
table2.set(1, "name", "y");
table2.delete(1);
eq(table2.size(), 2);
table2.set(2, "name", "z");
table2.print();
db2.shutdown();
/** * READ DB 3 ** */
Db db3 = Ohm.db(DB_FILE);
Table<Person> table3 = db3.table(Person.class);
eq(table3.size(), 2);
table3.print();
db3.shutdown();
}
@Test
public void shouldPersistToFileMini() throws IOException, TransactionException {
Db db = Ohm.db(DB_FILE);
Table<Person> table = db.table(Person.class);
assert 0 == table.insert(person("a", 100));
assert 1 == table.insert(person("b", 200));
db.shutdown();
/** * READ DB 2 ** */
Db db2 = Ohm.db(DB_FILE);
Table<Person> table2 = db2.table(Person.class);
Transaction txx = db2.startTransaction();
eq(table2.size(), 2);
System.out.println("now delete...");
table2.delete(1);
eq(table2.size(), 1);
txx.commit();
Transaction txx2 = db2.startTransaction();
System.out.println("now set name");
table2.set(0, "name", "z");
txx2.commit();
db2.shutdown();
/** * READ DB 3 ** */
U.sleep(1000);
System.out.println("=============================");
Db db3 = Ohm.db(DB_FILE);
Table<Person> table3 = db3.table(Person.class);
eq(table3.size(), 1);
}