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  package org.apache.cayenne.unit;
  
  import javax.naming.NamingException;
  import javax.naming.spi.NamingManager;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.mock.jndi.SimpleNamingContextBuilder;
  
  /**
   * A helper class to setup a shared test JNDI environment.
   */
  public class JNDISetup {
  
      private static Logger logger = LoggerFactory.getLogger(JNDISetup.class);
  
      private static volatile boolean setup;
  
      public static void doSetup() {
          if (!setup) {
  
              synchronized (JNDISetup.class) {
  
                  if (!setup) {
                      try {
                          NamingManager
                                  .setInitialContextFactoryBuilder(new SimpleNamingContextBuilder());
                      }
                      catch (NamingException e) {
                          logger.error("Can't perform JNDI setup, ignoring...", e);
                      }
  
                      setup = true;
                  }
              }
          }
      }
  
  }
  