Bypass DriverManager for JDBC connections loaded at runtime

When ojdbc*.jar is added to the load path at runtime (via require)
rather than being on the system classpath, DriverManager.getConnection
fails with "No suitable driver found" due to classloader isolation in
JRuby. Fall back to using ORACLE_DRIVER.connect directly, matching
the same workaround used in oracle_enhanced adapter.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yahonda

lib/plsql/jdbc_connection.rb

@@ -35,7 +35,8 @@
     end
   end
 
-  java.sql.DriverManager.registerDriver Java::oracle.jdbc.OracleDriver.new
+  ORACLE_DRIVER = Java::oracle.jdbc.OracleDriver.new
+  java.sql.DriverManager.registerDriver ORACLE_DRIVER
 
   # set tns_admin property from TNS_ADMIN environment variable
   if !java.lang.System.get_property("oracle.net.tns_admin") && ENV["TNS_ADMIN"]
@@ -51,7 +52,18 @@ module PLSQL
   class JDBCConnection < Connection  # :nodoc:
     def self.create_raw(params)
       url = jdbc_connection_url(params)
-      new(java.sql.DriverManager.getConnection(url, params[:username], params[:password]))
+      conn = begin
+        java.sql.DriverManager.getConnection(url, params[:username], params[:password])
+      rescue
+        # bypass DriverManager to work in cases where ojdbc*.jar
+        # is added to the load path at runtime and not on the
+        # system classpath
+        ORACLE_DRIVER.connect(url, java.util.Properties.new.tap do |props|
+          props.setProperty("user", params[:username])
+          props.setProperty("password", params[:password])
+        end)
+      end
+      new(conn)
     end
 
     def self.jdbc_connection_url(params)

spec/spec_helper.rb

@@ -88,7 +88,17 @@ def get_connection(user_number = 0)
     end
   else
     try_to_connect(Java::JavaSql::SQLException) do
-      java.sql.DriverManager.getConnection(get_connection_url, database_user, database_password)
+      begin
+        java.sql.DriverManager.getConnection(get_connection_url, database_user, database_password)
+      rescue Java::JavaSql::SQLException
+        # bypass DriverManager to work in cases where ojdbc*.jar
+        # is added to the load path at runtime and not on the
+        # system classpath
+        ORACLE_DRIVER.connect(get_connection_url, java.util.Properties.new.tap do |props|
+          props.setProperty("user", database_user)
+          props.setProperty("password", database_password)
+        end)
+      end
     end
   end
 end