## Créer une fonction de tâche

Une fonction à exécuter comme tâche d'arrière-plan est juste une fonction standard qui peut recevoir des paramètres.

Elle peut être une fonction asynchrone (`async def`) ou une fonction normale (`def`), **FastAPI** saura la gérer correctement.

Dans cet exemple, la fonction de tâche écrira dans un fichier (afin de simuler un envoi d'email).

    }

    protected void registerModifiedProperty(String propertyName) {
        __modifiedProperties.addPropertyName(propertyName);
        registerSpecifiedProperty(propertyName); // synchronize if exists, basically for user's manual call
    }

    public void modifiedToSpecified() {
        if (__modifiedProperties.isEmpty()) {

    public static final int WRITE_DAC             = 0x00040000; // 18
    public static final int WRITE_OWNER           = 0x00080000; // 19
    public static final int SYNCHRONIZE           = 0x00100000; // 20
    public static final int GENERIC_ALL           = 0x10000000; // 28
    public static final int GENERIC_EXECUTE       = 0x20000000; // 29

    public static final int WRITE_DAC = 0x00040000; // 18
    /**
     * 
     */
    public static final int WRITE_OWNER = 0x00080000; // 19
    /**
     * 
     */
    public static final int SYNCHRONIZE = 0x00100000; // 20
    /**
     * 
     */
    public static final int GENERIC_ALL = 0x10000000; // 28
    /**
     * 
     */
    public static final int GENERIC_EXECUTE = 0x20000000; // 29

    }

    protected void registerModifiedProperty(String propertyName) {
        __modifiedProperties.addPropertyName(propertyName);
        registerSpecifiedProperty(propertyName); // synchronize if exists, basically for user's manual call
    }

    public void modifiedToSpecified() {
        if (__modifiedProperties.isEmpty()) {

    #   o isOverrideExistingDataFile: Does it output to existing files? (NotRequired - Default false)
    #   o isSynchronizeOriginDate: Does it synchronize origin date for date adjustment? (NotRequired - Default false)
    #
    ; loadDataReverseMap = map:{
        ; recordLimit = -1
        ; isReplaceSchemaDirectUse = true
        ; isOverrideExistingDataFile = false

        if (ioe != null)
            throw ioe;
    }
    public void run() {
        Thread run_thread = Thread.currentThread();
        Exception ex0 = null;

        try {
            /* We cannot synchronize (run_thread) here or the caller's
             * thread.wait( timeout ) cannot reaquire the lock and
             * return which would render the timeout effectively useless.
             */
            doConnect();

!!! tip "Tipp"
    Wenn Sie in Ihren Tests neben dem Senden von Anfragen an Ihre FastAPI-Anwendung auch `async`-Funktionen aufrufen möchten (z. B. asynchrone Datenbankfunktionen), werfen Sie einen Blick auf die [Async-Tests](../advanced/async-tests.md){.internal-link target=_blank} im Handbuch für fortgeschrittene Benutzer.

## Tests separieren

    static final int READ_CONTROL          = 0x00020000; // 17
    static final int WRITE_DAC             = 0x00040000; // 18
    static final int WRITE_OWNER           = 0x00080000; // 19
    static final int SYNCHRONIZE           = 0x00100000; // 20
    static final int GENERIC_ALL           = 0x10000000; // 28
    static final int GENERIC_EXECUTE       = 0x20000000; // 29
    static final int GENERIC_WRITE         = 0x40000000; // 30

            return waitingThreads;
          }

          @Override
          public Boolean get() {
            // Check that this method is called exactly once, by the first
            // thread to synchronize.
            long t0 = System.nanoTime();
            while (waitingThreads() != numThreads - 1) {
              if (System.nanoTime() - t0 > timeout) {
                thrown.set(