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javarubyjdbcdriverjruby

Why does the error "Uninitialized constant DriverManager" occur in previously functioning code?

I'm working with jruby and I'm making calls to a DB2/BIGSQL database via the db2jcc4.jar file. I was making connections perfectly fine both inserts and selects, and then all of a sudden I started getting the error "uninitialized constant DriverManager."

The file db2jcc4.jar is readable and has the correct permissions. I even went back to a previously working, earlier version of the code and I get the same error. The only notable change is that the server was restarted. 

require 'java'

java_import 'com.ibm.db2.jcc.DB2Driver'
java_import 'java.util.Properties'

url = "jdbc:db2://SERVER-REMOVED:PORT_REMOVED/BIGSQL"
output, rset, stmt, conn = nil

begin
  properties = java.util.Properties.new
  properties['user'] = 'USER REMOVED'
  properties['password'] = 'PASSWORD REMOVED'

  # Load driver class
  driver = DB2Driver.new

  DriverManager.registerDriver driver #this comes out to nil
  regDrivers = DriverManager.getDrivers
  conn = DriverManager.get_connection url, properties
  ...

Any idea what happened?

Solution

  • You probably need to import the DriverManager class 

    java_import 'java.sql.DriverManager'