How to use com.occamlab.te.spi.executors

/**
 * Returns a singleton manager in a lazy (but thread-safe) manner.
 * 
 * @return the <code>FixtureManager</code> instance.
 */
public static FixtureManager getInstance() {
  // Employ a "double-checked locking" strategy because a lock is only
  // needed upon initialization; synchronize on the monitor belonging to
  // the class itself.
  if (null == manager) {
    synchronized (FixtureManager.class) {
      // check again, because the thread might have been preempted
      // just after the outer if was processed but before the
      // synchronized statement was executed
      if (manager == null) {
        manager = new FixtureManager();
      }
    }
  }
  return manager;
}

@Override
public Source doTestRun(Document testRunArgs) throws Exception {
  validateTestRunArgs(testRunArgs);
  return executor.execute(testRunArgs);
}

@Override
public Source doTestRun(Document testRunArgs) throws Exception {
  validateTestRunArgs(testRunArgs);
  return executor.execute(testRunArgs);
}

@Override
public Source doTestRun(Document testRunArgs) throws Exception {
  validateTestRunArgs(testRunArgs);
  return executor.execute(testRunArgs);
}

@Override
public Source doTestRun(Document testRunArgs) throws Exception {
  validateTestRunArgs(testRunArgs);
  return executor.execute(testRunArgs);
}