MarioC questions

• Spring security - what to do when Authentication is null
• Hibernate Validation + Custom Constraint + java.lang.NullPointerException
• Spring boot application does not start
• Spring boot - POST method not allowed
• Java Timer.schedule runs only once
• Spring security - encoded password gives me Bad Credentials
• SpringData JPA - Provided id of the wrong type for class . Expected: class java.lang.Integer, got class java.lang.Long
• Spring Boot - how to avoid concurrent access to controller
• Vue and Bootstrap Vue - dynamically use slots
• Spring OAUTH - different login for web e REST

MarioC answers