@Grab(group='org.mapdb', module='mapdb', version='1.0.8')

import org.mapdb.DB

import org.mapdb.DBMaker

class User implements Serializable {

String name

String surname

}

def writeSomeData(Map m) {

m.put(1, new User(name: "mario", surname: "rossi"))

m.put(2, new User(name: "gianni", surname: "bianchi"))

m.put(3, new User(name: "pino", surname: "verdi"))

}

def readSomeData(Map m) {

m.each {k, v ->

println "id: $k, value: $v"

}

}

if (args.size() != 1) {

println "groovy mapdbWalTest.groovy [writer|reader]"

exit 1

}

String mode = args[0]

File tmpFile = new File("test_store.mapdb")

tmpFile.createNewFile()

DB db = DBMaker.newFileDB(tmpFile).make()

Map mapStore = db.getHashMap("storageMap")

switch (mode) {

case "writer":

writeSomeData(mapStore)

db.commit()

return

case "reader":

readSomeData(mapStore)

return

default:

println "Error option not recognized must be one of [writer|reader]"

}