Oracle Descriptor Option

[Krithika-Madhavan]

Hi ,

I started using R2DBC recently and we have a descriptor in this Format,

(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = hostname)(PORT = portnum)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = servicename)))

and When i tried connecting to R2DBC using this as below

r2dbc:oracle://?oracle.r2dbc.descriptor=(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = hostname)(PORT = portnum)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = servicename)))

My Spring app starts failing with Illegal Character error.

Can you please help providing a sample connection string for this use case or else any solution that will help.

Thanks in Advance!!

[Michael-A-McMahon]

You'll need to remove the space characters in the descriptor.

Here's some code I wrote to test this out. You can see after replace(" ", ""), the descriptor URL does not result in an error.

import io.r2dbc.spi.ConnectionFactories;
import io.r2dbc.spi.ConnectionFactory;

public class DescriptorTest {

  public static void main(String[] args) {

    String descriptorUrl =
        "r2dbc:oracle://?oracle.r2dbc.descriptor=(DESCRIPTION =" +
            "(ADDRESS = " +
            " (PROTOCOL = TCP)" +
            "(HOST = hostname)(PORT = portnum))" +
            " (CONNECT_DATA = " +
            "(SERVER = DEDICATED)" +
            " (SERVICE_NAME = servicename)))";

    tryUrl(descriptorUrl);

    descriptorUrl = descriptorUrl.replace(" ", "");
    tryUrl(descriptorUrl);
  }

  static void tryUrl(String url) {
    System.out.println("Trying:\n" + url);
    try {
      ConnectionFactory connectionFactory =
          ConnectionFactories.get(url);
    }
    catch (Exception exception) {
      System.out.println(exception.getMessage());
    }
  }
}

Compared to JDBC, R2DBC is more strict about the URL format. URLs must comply with RFC 3986. This is summarized in the R2DBC Specification here: https://r2dbc.io/spec/1.0.0.RELEASE/spec/html/#overview.connection.url
With this specification, a space character may not appear in the query section of the URL (the section following the ? character).

Hope this helps.

[Michael-A-McMahon]

I'm closing this issue now. I hope it was resolved.