Can database Snapshots be passed to other methods? - database

Question

I have tried to write this code in three different ways but none of them work correctly.
I did not want to write any business logic code in the class that opens and closes the database, so I have a database class. I am trying to take a Snapshot of the database to send it to the business logic class.
However what is the correct way to send a Snapshot or Iterator across to another class?
Here is my current code in the database connection class trying to return an Iterator to the business logic class:
public synchronized DBIterator getSnapShot() throws IOException {
ReadOptions ro = new ReadOptions();
Options options = new Options();
DBIterator iterator = null;
try {
DB database = (factory.open(new File("myFilePath"), options));
ro.snapshot(database.getSnapshot());
iterator = database.iterator(ro);
return iterator;
} catch (Exception e) {
e.printStackTrace();
} finally {
getLinkPacDatabase().close();
}
return iterator;
}
Then I try to iterate in the business logic class like this:
for (iterator.seekToFirst(); iterator.hasNext(); iterator.next()) {
I have also tried to grab a Snapshot only from the database like this, but it also does not work because the database connection has to close obviously:
public synchronized Snapshot generateSnapshot() {
Snapshot snapshot = null;
DB database = null;
try {
database = factory.open(new File("myFilePath"), options);
snapshot = database.getSnapshot();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
database.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return snapshot;
}
There is no documentation for the levelDb Java port library I am using, therefore I am hoping someone can explain if I am using Snapshots incorrectly.