Michael-A-McMahon
commented
2 years ago I think you're right; The bufferUntilChanged operator has a call to person.get("id"). I suspect the get(String) method is implemented to call getColumnNames(), as the "id" string looks like a column name. If you can share a stack trace for the UnsupportedOperationException, then we can confirm where the call to getColumnNames is coming from.
Standard disclaimer: I have almost no experience working with Spring. However, I think the person object is implemented or generated by Spring Data R2DBC? If so, that would mean the version of Spring Data R2DBC you have is calling getColumnNames. I'd wonder then if there is a newer version of Spring Data R2DBC you can use? A newer version should not be calling the deprecated method.
BTW, no need to apologize for long descriptions; Detail is something that I appreciate :)
mofeed-hassan
Hi, Although the existing previous issues but I feel confused about what to do. So In this issue I will summarize what I am facing. Development environment: Spring, R2DBC, Oracle DB Versions: spring boot --> 2.7.0 , Oracle R2DBC --> 0.4.0 Task Objective: reading a specific entity from the db with its related entities using a customized written sql statement to make one single DB query for all data. The repository code that retrieves the data:
@repository public class MyCustomRepository { private static final String query ="..."; private final DatabaseClient databaseClient; //org.springframework.r2dbc.core.DatabaseClient this.databaseClient.sql(query) // .bind("fName", fName) // .bind("lName", lName) // .fetch().all() // s .bufferUntilChanged(person -> person.get("id")) // .map(.......) }Observations:previous observation: primarily, I got the error "Failed to obtain R2DBC, this publisher does not support multiple subscribers", even if I specify the version of oracle-r2db, r2dbc-spi and r2dbc-pool explicitly to be `0.2.0</oracle-r2dbc.version>
current observation: java.lang.UnsupportedOperationException: This method is deprecated for removal getColumnNames(). Based on the previous observation, I tried two different solutions:
I think this method is called in bufferUntilChanged(), so execluding it exciplicitly is not possible. The method bufferUntilChanged() helps me to aggregate each person entity with its related entities in map(). Questions:
Sorry for the long description but as I am new to the thema I wanted o make sure to pull all the info. as much as spossible