mapdb/src/test/java/doc/start_advanced.java at master · CodingCat/mapdb

Repository navigation

package doc;

import org.mapdb.DB;

import org.mapdb.DBMaker;

import java.io.File;

import java.util.concurrent.ConcurrentNavigableMap;

public class start_advanced {

public static void main(String[] args) {

//a

// import org.mapdb.*;

// configure and open database using builder pattern.

// all options are available with code auto-completion.

DB db = DBMaker.fileDB(new File("testdb"))

.closeOnJvmShutdown()

.encryptionEnable("password")

.make();

// open existing an collection (or create new)

ConcurrentNavigableMap<Integer,String> map = db.treeMap("collectionName");

map.put(1, "one");

map.put(2, "two");

// map.keySet() is now [1,2]

db.commit(); //persist changes into disk

map.put(3, "three");

// map.keySet() is now [1,2,3]

db.rollback(); //revert recent changes

// map.keySet() is now [1,2]

db.close();

//z

}