persistence

When I implement this part of this python code in Azure Databricks: class clustomTransformations(Transformer): <code> custom_transformer = customTransformations() .... pipeline = Pipeline(stages=[custom_transformer, assembler, scaler, rf]) pipeline_model = pipeline.fit(sample_data) pipeline_model.save(<your path>) When I attempt to save the pipeline, I get this: AttributeError: 'customTransformations' object has no attribute '_to_java' Any work arounds? dportman It seems like there is no easy workaround but to try and implement the _to_java method, as is suggested here for StopWordsRemover:

I am using javax.persistence.OneToMany relationship in a Parent Child relationship. The parent Id is coming as null, I have read through all the related post in Stackoverflow but not getting any clue what I am missing. All the Corresponding PKs are getting populated in both Parent & Child tables as per the Sequence Provided, but the FK is set to null in Child table Parent Class: @Entity @Table(name = "DIVERSITY_TEMPLATE") public class DiversityTemplate implements Serializable { private static final long serialVersionUID = 1L; @Id @SequenceGenerator(name = "DIVERSITY_TEMPLATE_ID", sequenceName

I'm developing an iOS app that is going to parse XML from an RSS feed of events and display the details of each event on a table view. Each event has a title, a description (optional), a date and a time. I am able to parse the XML data using NSXMLParser; however, I am not sure how I should store the data and make it so that it persists after the app is closed. I have read that I can use NSCoder to persist the data but I am not sure if this is the best route forward. Does anyone have any ideas or suggestions as to what I could do? Any help is appreciated. Tobi Nary You have several options for

What happens with Entities in session if I make rollback ? Do they get back to the state before transaction ? In particular do they get new ids ? Example: session.startTransaction(); Entity e = new Entity(); //e.id == null session.save (e); //suppose it was ok session.rollback(); // e.id == ??? Update : I've made the Hibernate 4 test. After the test the entity has become a new id. I will simply quote from the JPA implementation (3.3.2 Transaction Rollback): For both transaction-scoped and extended persistence contexts, transaction rollback causes all pre-exist-ing managed instances and removed

I'm developing a simple chat web application based on the MSN protocol. The server communicates with the MSN server through a file resource returned from fsockopen () . The client accesses the server via XMLHttpRequest . The server initially logs in, and prints out the contact list (formatted in an HTML table) which the client receives through the responseText () of the XMLHttpRequest object. Here's the problem. The file resource that is responsible for communication with the MSN server must be kept alive in order for all chat related functions to work (creating conversations, keeping track of