GH 41262:[Java][FlightSQL] Implement stateless prepared statement

Attempt to get TempDir clean up

java/flight/flight-sql/src/test/java/org/apache/arrow/flight/sql/example/FlightSqlExample.java

@@ -158,7 +158,7 @@
 public class FlightSqlExample implements FlightSqlProducer, AutoCloseable {
   private static final Logger LOGGER = getLogger(FlightSqlExample.class);
   protected static final Calendar DEFAULT_CALENDAR = JdbcToArrowUtils.getUtcCalendar();
-  public static final Path DB_PATH = Paths.get("target", "derbyDB");
+  public static final Path DB_PATH = Paths.get("target", "tmp");
   private final String databaseUri;
   // ARROW-15315: Use ExecutorService to simulate an async scenario
   private final ExecutorService executorService = Executors.newFixedThreadPool(10);
@@ -195,7 +195,7 @@ private String toUri(Path path) {
 
   public FlightSqlExample(final Location location, final Path dbName) {
     // TODO Constructor should not be doing work.
-    final String derbyDatabaseUri = toUri(dbName);
+    final String derbyDatabaseUri = toUri(dbName) + "/derbyDB";
     databaseUri = "jdbc:derby:" + derbyDatabaseUri;
     checkState(
         populateDerbyDatabase(databaseUri),

java/flight/flight-sql/src/test/java/org/apache/arrow/flight/sql/example/FlightSqlStatelessExample.java

@@ -68,7 +68,7 @@
  */
 public class FlightSqlStatelessExample extends FlightSqlExample {
   private static final Logger LOGGER = getLogger(FlightSqlStatelessExample.class);
-  public static final Path DB_PATH = Paths.get("target", "derbyStatelessDB");
+  public static final Path DB_PATH = Paths.get("target", "tmpStateless");
 
 
   public FlightSqlStatelessExample(final Location location, final Path dbPath) {

java/flight/flight-sql/src/test/java/org/apache/arrow/flight/sql/test/TestFlightSql.java

@@ -28,6 +28,7 @@
 import static org.hamcrest.CoreMatchers.nullValue;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.io.CleanupMode.ALWAYS;
 
 import java.nio.file.Path;
 import java.sql.SQLException;
@@ -98,7 +99,7 @@ public class TestFlightSql {
   protected static FlightSqlClient sqlClient;
 
   @TempDir
-  private static Path dbPath = FlightSqlExample.DB_PATH;
+  static Path dbPath;
 
   @BeforeAll
   public static void setUp() throws Exception {

java/flight/flight-sql/src/test/java/org/apache/arrow/flight/sql/test/TestFlightSqlStateless.java

@@ -20,6 +20,7 @@
 import static org.apache.arrow.flight.sql.util.FlightStreamUtils.getResults;
 import static org.apache.arrow.util.AutoCloseables.close;
 import static org.hamcrest.CoreMatchers.*;
+import static org.junit.jupiter.api.io.CleanupMode.ALWAYS;
 
 import java.nio.file.Path;
 
@@ -48,7 +49,7 @@
  */
 public class TestFlightSqlStateless extends TestFlightSql {
   @TempDir
-  private static Path dbPath = FlightSqlStatelessExample.DB_PATH;
+  static Path dbPath;
 
 
   @BeforeAll