void dispatch() {
      boolean scheduleEventRunner = false;
      synchronized (this) {
        if (!isThreadScheduled) {
          isThreadScheduled = true;
          scheduleEventRunner = true;
        }
      }
      if (scheduleEventRunner) {
        try {
          executor.execute(this);
        } catch (Exception e) { // sneaky checked exception

    //                                                                              ======
    @Override
    public Map<String, Object> toSource() {
        Map<String, Object> sourceMap = new HashMap<>();
        if (name != null) {
            addFieldToSource(sourceMap, "name", name);
        }
        return sourceMap;
    }

    protected void addFieldToSource(Map<String, Object> sourceMap, String field, Object value) {

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.smb1.util;

import java.io.PrintStream;

/**
0 - nothing
1 - critical [default]

mc admin user add dest repluser repluser123

# create a replication policy for repluser
# Remove "s3:GetBucketObjectLockConfiguration" if object locking is not enabled, i.e. bucket was not created with `mc mb --with-lock` option
# Remove "s3:ReplicateDelete" if delete marker replication is not required
cat >replpolicy.json <<EOF
{
 "Version": "2012-10-17",
 "Statement": [
  {
   "Effect": "Allow",
   "Action": [

     * @return A Promise that will be resolved with the response or rejected with an error.
     */
    public Deferred<T>.Promise execute(final Client client) {
        final String error = getValidationError();
        if (!Strings.isNullOrEmpty(error)) {
            throw new IllegalArgumentException(error);
        }

        final Deferred<T> deferred = new Deferred<>();
        try {
            processRequest(client, deferred);

        assertArgumentNotNull("out", out);

        if (in instanceof FileInputStream) {
            if (out instanceof FileOutputStream) {
                return copyInternal((FileInputStream) in, (FileOutputStream) out);
            }
            return copyInternal((FileInputStream) in, wrap(out));
        }
        if (out instanceof FileOutputStream) {

        try {
            return asJson(new ApiResult.ApiStorageResponse().items(list).status(ApiResult.Status.OK).result());
        } catch (final ResultOffsetExceededException e) {
            if (logger.isDebugEnabled()) {
                logger.debug(e.getMessage(), e);
            }
            throwValidationErrorApi(messages -> messages.addErrorsResultSizeExceeded(GLOBAL));
        }

        return null;

  static TestSuite tests(String name, CharSourceFactory factory, boolean testAsByteSource) {
    TestSuite suite = new TestSuite(name);
    for (Entry<String, String> entry : TEST_STRINGS.entrySet()) {
      if (testAsByteSource) {
        suite.addTest(
            suiteForBytes(factory, entry.getValue().getBytes(UTF_8), name, entry.getKey(), true));
      } else {

      @Override
      public Class<?> loadClass(String name) throws ClassNotFoundException {
        if (blocklist.contains(name)) {
          throw new ClassNotFoundException("I'm sorry Dave, I'm afraid I can't do that.");
        }
        if (name.startsWith(concurrentPackage)) {
          Class<?> c = findLoadedClass(name);
          if (c == null) {
            return super.findClass(name);
          }
          return c;

If you don't want to add a specific value but just make it optional, set the default as `None`.

But when you want to make a query parameter required, you can just not declare any default value:

{* ../../docs_src/query_params/tutorial005.py hl[6:7] *}

Here the query parameter `needy` is a required query parameter of type `str`.

If you open in your browser a URL like:

```