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

/**
 * The crawler login failure exception.
 * This exception is thrown when the crawler fails to login to a website.
 *
 */
public class CrawlerLoginFailureException extends CrawlerSystemException {
    private static final long serialVersionUID = 1L;

    /**

        return EventListener.NONE;
      }
    }
  };

  ...
}
```

### Events with Failures

When an operation fails, a failure method is called. This is `connectFailed()` for failures while building a connection to the server, and `callFailed()` when the HTTP call fails permanently. When a failure happens it is possible that a `start` event won’t have a corresponding `end` event.

    expectedEvents += RequestHeadersStart::class
    expectedEvents += RequestHeadersEnd::class
    expectedEvents += RequestBodyStart::class
    // ... but we can read the response even after writing the request fails.
    expectedEvents += RequestFailed::class
    expectedEvents += ResponseHeadersStart::class
    expectedEvents += ResponseHeadersEnd::class
    expectedEvents += FollowUpDecision::class

     * simple approach would be for each caller CAS it from null to a Set populated with its
     * exception. But there's another race: If the first thread fails with an exception and a second
     * thread immediately fails with the same exception:
     *
     * Thread1: calls setException(), which returns true, context switch before it can CAS
     * seenExceptionsField to its exception
     *

package target

import (
	"database/sql"
	"slices"
	"testing"
)

// TestPostgreSQLRegistration checks if sql driver
// is registered and fails otherwise.
func TestMySQLRegistration(t *testing.T) {
	var found bool
	if slices.Contains(sql.Drivers(), "mysql") {
		found = true
	}
	if !found {
		t.Fatal("mysql driver not registered")
	}

    /**
     * Constructs KerberosPacAuthData from token bytes.
     *
     * @param token the PAC token bytes
     * @param keys map of Kerberos keys indexed by key type
     * @throws PACDecodingException if PAC decoding fails
     */
    public KerberosPacAuthData(byte[] token, Map<Integer, KerberosKey> keys) throws PACDecodingException {
        this.pac = new Pac(token, keys);
    }

    /**
     * Returns the PAC object.
     *

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.exception;

/**
 * Exception thrown when command execution fails.
 * This exception indicates that an external command or process execution encountered an error.
 */
public class CommandExecutionException extends FessSystemException {

    private static final long serialVersionUID = 1L;

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

/**
 * Exception thrown when thumbnail generation fails.
 * This exception is used for errors during thumbnail creation and processing.
 */
public class ThumbnailGenerationException extends FessSystemException {

    private static final long serialVersionUID = 1L;

    /**

     */
    public Promise then(final Consumer<RESPONSE> consumer) {
        return promise.then(consumer);
    }

    /**
     * Registers a callback to be executed when the computation fails.
     * @param consumer The callback.
     * @return The promise.
     */
    public Promise error(final Consumer<Throwable> consumer) {
        return promise.error(consumer);
    }

    /**

  /** Invoked with the result of the {@code Future} computation when it is successful. */
  void onSuccess(@ParametricNullness V result);

  /**
   * Invoked when a {@code Future} computation fails or is canceled.
   *
   * <p>If the future's {@link Future#get() get} method throws an {@link ExecutionException}, then
   * the cause is passed to this method. Any other thrown object is passed unaltered.
   */