# Concurrency and async / await

Details about the `async def` syntax for *path operation functions* and some background about asynchronous code, concurrency, and parallelism.

## In a hurry?

<abbr title="too long; didn't read"><strong>TL;DR:</strong></abbr>

If you are using third party libraries that tell you to call them with `await`, like:

```Python
results = await some_library()
```

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.exception;

public class InvalidAccessTokenException extends FessSystemException {

    private static final long serialVersionUID = 1L;

    private final String type;

    public InvalidAccessTokenException(final String type, final String message) {
        super(message);
        this.type = type;
    }

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.exception;

public class SearchQueryException extends FessSystemException {

    private static final long serialVersionUID = 1L;

    public SearchQueryException(final String message, final Throwable cause) {
        super(message, cause);
    }

    public SearchQueryException(final String message) {

/** Simple derived class to verify that we handle generics correctly. */
@GwtCompatible
class Derived extends Base {
  public Derived(String s) {
    super(s);
  }

  private static final long serialVersionUID = 0;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.suggest.exception;

public class SuggestIndexException extends SuggesterException {

    private static final long serialVersionUID = -3792626439756997194L;

    public SuggestIndexException(final String msg) {
        super(msg);
    }

    public SuggestIndexException(final Throwable cause) {
        super(cause);
    }

 */
package org.codelibs.fess.crawler.exception;

/**
 * @author shinsuke
 *
 */
public class ExecutionTimeoutException extends ExtractException {

    private static final long serialVersionUID = 1L;

    public ExecutionTimeoutException(final String message, final Throwable cause) {
        super(message, cause);
    }

    public ExecutionTimeoutException(final String message) {

 */
package org.codelibs.fess.crawler.exception;

/**
 * @author shinsuke
 *
 */
public class ExtractException extends CrawlerSystemException {

    private static final long serialVersionUID = 1L;

    public ExtractException(final String message, final Throwable cause) {
        super(message, cause);
    }

    public ExtractException(final String message) {
        super(message);

 */
package org.codelibs.fess.crawler.exception;

/**
 * @author shinsuke
 *
 */
public class RobotsTxtException extends CrawlerSystemException {

    private static final long serialVersionUID = 1L;

    public RobotsTxtException(final String message, final Throwable cause) {
        super(message, cause);
    }

    public RobotsTxtException(final String message) {
        super(message);

	var centralOpts clioptions.CentralControlPlaneOptions

	debugCommand := &cobra.Command{
		Use:   "internal-debug [<type>/]<name>[.<namespace>]",
		Short: "Retrieves the debug information of istio",
		Long: `
Retrieves the debug information from Istiod or Pods in the mesh using the service account from the pod if --cert-dir is empty.
By default it will use the default serviceAccount from (istio-system) namespace if the pod is not specified.

import java.lang.reflect.Field;

/**
 * {@link Field}が見つからない場合にスローされる例外です。
 *
 * @author higa
 *
 */
public class FieldNotFoundRuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = -2715036865146285893L;

    private final Class<?> targetClass;

    private final String fieldName;

    /**
     * {@link FieldNotFoundRuntimeException}を作成します。
     *