Realm: say "no" to begin/commit and use execute (and use close!)

gistfile1.java

// SAY NO TO THIS
Realm realm = Realm.getDefaultInstance();
realm.beginTransaction(); // NO
realm.copyToRealm(dog)
realm.commitTransaction(); // NO NO NO NO NO
    // CLOSE THE REALM OH MY GOD WHY

// ----------------------

// SAY YES TO THIS
Realm realm = null;
try { // I could use try-with-resources here
    realm = Realm.getDefaultInstance();
    realm.executeTransaction(new Realm.Transaction() {
        @Override
        public void execute(Realm realm) {
            realm.insertOrUpdate(dog);
        }
    });
} finally {
  if(realm != null) {
    realm.close();
  }
}

// OR IN SHORT (Retrolambda)

try(Realm realmInstance = Realm.getDefaultInstance()) {
    realmInstance.executeTransaction((realm) -> realm.insertOrUpdate(dog));
}