<img src="/img/tutorial/dependencies/image01.png">

## Einfache Verwendung { #simple-usage }

Näher betrachtet, werden *Pfadoperation-Funktionen* deklariert, um verwendet zu werden, wann immer ein *Pfad* und eine *Operation* übereinstimmen, und dann kümmert sich **FastAPI** darum, die Funktion mit den richtigen Parametern aufzurufen, die Daten aus dem Request extrahierend.

                        clickCountMap.put(docId, countObj);
                    }).orElse(() -> {
                        logger.warn("Not Found for SearchLog: {}", clickLog);
                    });
                } catch (final Exception e) {
                    logger.warn("Failed to process: {}", clickLog, e);
                }
            }
            if (clickLogList.size() >= batchSize) {

    ReentrantLock lockD = otherFactory.newReentrantLock("LockD");

    // lockD -> lockA
    lockD.lock();
    lockA.lock();
    lockA.unlock();
    lockD.unlock();

    // lockA -> lockD should warn but otherwise succeed because lockD was
    // created by a factory with the WARN policy.
    lockA.lock();
    lockD.lock();
  }

        final LabelType labelType = getLabelType(body).map(entity -> {
            try {
                labelTypeService.store(entity);
            } catch (final Exception e) {
                logger.warn("Failed to process a request.", e);
                throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateCrudTable(GLOBAL, buildThrowableMessage(e)));
            }
            return entity;

    }

    @Override
    protected void finalize() throws Throwable {
        try {
            // Add null check to prevent NPE if object was not fully constructed
            if (this.usageCount != null && this.usageCount.get() != 0) {
                log.warn("Tree handle was not properly released, performing emergency cleanup: "
                        + (this.resourceLoc != null ? this.resourceLoc.getURL() : "unknown"));

 *     .build();
 * Response forceCacheResponse = client.newCall(request).execute();
 * if (forceCacheResponse.code() != 504) {
 *   // The resource was cached! Show it.
 * } else {
 *   // The resource was not cached.
 * }
 * ```
 *
 * This technique works even better in situations where a stale response is better than no response.

                for (CircuitBreakerListener listener : listeners) {
                    try {
                        listener.onCallRejected(this);
                    } catch (Exception ex) {
                        log.warn("Listener threw exception", ex);
                    }
                }

                throw new CircuitOpenException("Circuit breaker '" + name + "' is open");
            }

                    badWordService.exportCsv(writer);
                } catch (final Exception e) {
                    logger.warn("Failed to process a request.", e);
                    throwValidationError(messages -> messages.addErrorsFailedToDownloadBadwordFile(GLOBAL), this::asDownloadHtml);
                }

                final URI resourceUri;
                try {
                    resourceUri = resource.toURI();
                } catch (final URISyntaxException e) {
                    logger.warn("Invalid URI for resource: url={}", resource, e);
                    continue;
                }

                if ("file".equals(resourceUri.getScheme())) {

                + artifact.getScope() + " wins)");

        // TODO better way than static? this might hide messages in a reactor
        if (!ignoredArtifacts.contains(artifact)) {
            logger.warn("\n\tArtifact " + artifact + " retains local artifactScope '" + artifact.getScope()
                    + "' overriding broader artifactScope '" + ignoredScope + "'\n"