How do I execute a MongoDB js script using the Java MongoDriver

Question

I have implemented a JavaScript function inside the Mongodb server using this example.

It works fine when I use mongo shell, but I want to run it from inside a Java

Answer 1

@Autowired
private MongoOperations mongoOperations;

private final BasicDBObject basicDBObject = new BasicDBObject();

@PostConstruct
private void initialize() {
    basicDBObject.put("eval", "function() { return db.loadServerScripts(); }");
    mongoOperations.executeCommand(basicDBObject);
}

private void execute() {
    basicDBObject.put("eval", "function() { return echoFunction(3); }");
    CommandResult result = mongoOperations.executeCommand(basicDBObject);
}

And then you can use something like:

ObjectMapper mapper = new ObjectMapper();

And MongoOperation's:

mongoOperations.getConverter().read(CLASS, DBOBJECT);

Just try to have some workaround depends on your requirements