# Handling Errors

There are many situations in which you need to notify an error to a client that is using your API.

This client could be a browser with a frontend, a code from someone else, an IoT device, etc.

You could need to tell the client that:

* The client doesn't have enough privileges for that operation.
* The client doesn't have access to that resource.
* The item the client was trying to access doesn't exist.
* etc.

    // Accessing an URL protocol that was not enabled. The URL protocol mailto is not tested and
    // might not work as expected. It can be enabled by adding the --enable-url-protocols=mailto
    // option to the native-image command.
    platform.assumeNotGraalVMImage()
    val javaNetUrl = URL("mailto:******@****.***")
    assertThat(javaNetUrl.toHttpUrlOrNull()).isNull()
  }

  @Test
  fun fromUri() {

participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,tasks: Can raise exception for dependency, handled after response is sent
    Note over client,operation: Can raise HTTPException and can change the response
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise
        dep -->> handler: Raise HTTPException

building-a-machine-learning-microservice-with-fastapi/ title: Building a Machine Learning Microservice with FastAPI - author: Ravgeet Dhillon - Twilio link: https://www.twilio.com/en-us/blog/booking-appointments-twilio-notion-fastapi title: Booking Appointments with Twilio, Notion, and FastAPI - author: Abhinav Tripathi - Microsoft Blogs link: https://devblogs.microsoft.com/cosmosdb/azure-cosmos-db-python-and-fastapi/ title: Write a Python data layer with Azure Cosmos DB and FastAPI - author: Donny...

    1.0,
    Math.PI,
    (double) Integer.MAX_VALUE,
    (double) Long.MAX_VALUE,
    Double.MAX_VALUE,
    Double.POSITIVE_INFINITY,
    Double.NaN,
    Float.MAX_VALUE,
  };

  /** The notion of equality used by AtomicDoubleArray */
  static boolean bitEquals(double x, double y) {
    return Double.doubleToRawLongBits(x) == Double.doubleToRawLongBits(y);
  }

  static void assertBitEquals(double x, double y) {

// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package notify

import (
	"fmt"
	"strconv"
	"strings"

	"github.com/minio/minio/internal/config"
	"github.com/minio/minio/internal/event/target"
)

// SetNotifyKafka - helper for config migration from older config.

                this.uhe = new UnknownHostException( ex.getMessage() );
            } finally {
                synchronized( sem ) {
                    sem.count--;
                    sem.notify();
                }
            }
        }
    }

    static NbtAddress lookupServerOrWorkgroup( String name, InetAddress svr )

- The scheduling queue didn't notice any extenders' failures, it could miss some cluster events,
  and it could end up Pods rejected by Extenders stuck in unschedulable pod pool in 5min in the worst-case scenario.

          Invokable.from(A.class.getDeclaredMethod(name, parameterTypes));
      assertEquals(name, invokable.getName());
      assertEquals(A.class, invokable.getDeclaringClass());
      return invokable;
    }

    native void nativeMethod();

    synchronized void synchronizedMethod() {}
  }

  public void testConstructor_returnType() throws Exception {

          Invokable.from(A.class.getDeclaredMethod(name, parameterTypes));
      assertEquals(name, invokable.getName());
      assertEquals(A.class, invokable.getDeclaringClass());
      return invokable;
    }

    native void nativeMethod();

    synchronized void synchronizedMethod() {}
  }

  public void testConstructor_returnType() throws Exception {