persistable | A ruby lib for making objects

I add a persistent permission for the Storage Access Framework :

I'm quite new to the Spring Data JDBC library, but so far I'm really impressed.

Unfortunately JDBC driver for my database (SAP Hana) doesn't support retrieving of generated keys after INSERT (implementation of method PreparedStatement.getGeneratedKeys() throws UnsupportedOperationException).

Therefore I decided, that I'll not use the generated keys and will define the PK values before saving (+ implement Persistable.isNew()). However even if the PK values are defined before saving, whenever an INSERT operation is triggered, it fails on the error, that the generated keys can't be retrieved.

After investigating source code of the affected method (DefaultDataAccessStrategy.insert) I've recognized, that there is every time executed the JDBC operations update method with the KeyHolder parameter.

I've (naively) tweaked the code with following changes and it started to work:

• if the PK is already defined, the JDBC operations update method without the KeyHolder is invoked
• such PK is then immediately returned from the method

Following code snippet from the tweaked insert method illustrates the changes.

I have a small (Java SE 11.x) project where I'm testing CDI with Weld. I have these dependencies (among others but these are the relevant ones for this issue):

I'm seeing the following error when attempting to query and update some records to MongoDB using reactive streams:

PROBLEM:

when I tried to create a new entity 'Customer' with Spring Data JDBC (in a Spring-boot application)

I am trying to write and read files that are also visible and editable from a PC when the android device is connected to it via USB. These files might be created through the PC connection.

To achieve this I'm trying to take a persistable URI permission to a directory, and then create or read the files in that directory.

I am in the "proof of concept" phase.

Inside the MainActivity OnCreate method I have the following code:

The documentation says: https://www.doctrine-project.org/projects/doctrine-orm/en/2.7/reference/events.html#postupdate-postremove-postpersist

The three post events are called inside EntityManager#flush(). Changes in here are not relevant to the persistence in the database, but you can use these events to alter non-persistable items, like non-mapped fields, logging or even associated classes that are not directly mapped by Doctrine.

So let's imagine I have an Image entity:

Spring Boot 2.4.0, DB is MySql 8.

Data is fetched every 15 seconds from remote with REST and storing it to MySql DB with saveAll().

Which call the save() method for all the given entities.

All data has set ID.
And I am expecting that if there is no such id at DB - it will be inserted.
If such ID is already presented at DB - it will be updated.

Here is snipped from the console:

I have collection called Store like so: