import org.codelibs.fess.es.config.cbean.cq.bs.BsThumbnailQueueCQ;
import org.opensearch.search.aggregations.bucket.filter.FilterAggregationBuilder;
import org.opensearch.search.aggregations.bucket.global.GlobalAggregationBuilder;
import org.opensearch.search.aggregations.bucket.histogram.HistogramAggregationBuilder;
import org.opensearch.search.aggregations.bucket.missing.MissingAggregationBuilder;

### Import `FastAPI`

You import and create a `FastAPI` class as normally.

And we can even declare [global dependencies](dependencies/global-dependencies.md){.internal-link target=_blank} that will be combined with the dependencies for each `APIRouter`:

```Python hl_lines="1  3  7" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}

## Global Dependencies

	serviceFreeze                             // Freeze all S3 API calls.
	serviceUnFreeze                           // Un-Freeze previously frozen S3 API calls.
	// Add new service requests here.
)

// Global service signal channel.
var globalServiceSignalCh = make(chan serviceSignal)

// GlobalContext context that is canceled when server is requested to shut down.
// cancelGlobalContext can be used to indicate server shutdown.

import org.apache.maven.building.FileSource;
import org.apache.maven.building.Source;
import org.apache.maven.settings.Settings;

/**
 * Builds the effective settings from a user settings file and/or a global settings file.
 *
 * @deprecated since 4.0.0, use {@link org.apache.maven.api.services.SettingsBuilder} instead
 */
@Named
@Singleton
@Deprecated(since = "4.0.0")

  // targetAverageValue is the target per-pod value of global metric (as a quantity).
  // Mutually exclusive with TargetValue.
  // +optional
  optional k8s.io.apimachinery.pkg.api.resource.Quantity targetAverageValue = 4;
}

// ExternalMetricStatus indicates the current value of a global metric
// not associated with any Kubernetes object.
message ExternalMetricStatus {

    /**
     *
     *
     * @return the global toolchains file
     * @since 3.3.0
     * @deprecated use {@link #getInstallationToolchainsFile()}
     */
    @Deprecated
    File getGlobalToolchainsFile();

    /**
     *
     * @param globalToolchainsFile the global toolchains file
     * @return this request
     * @since 3.3.0

                return writeNdjsonResponse(id, getFavoriteLogNdjsonWriteCall());
            }
        }

        throwValidationErrorApi(messages -> messages.addErrorsCouldNotFindBackupIndex(GLOBAL));
        return StreamResponse.asEmptyBody(); // no-op
    }

    private StreamResponse writeNdjsonResponse(final String id, final Consumer<Writer> writeCall) {
        return asStream(id)//

		config.KV{
			Key:   browserHSTSPreload,
			Value: config.EnableOff,
		},
		config.KV{
			Key:   browserReferrerPolicy,
			Value: "strict-origin-when-cross-origin",
		},
	}
)

// configLock is a global lock for browser config
var configLock sync.RWMutex

// Config storage class configuration
type Config struct {
	CSPPolicy             string `json:"csp_policy"`
	HSTSSeconds           int    `json:"hsts_seconds"`

		if s.hasReplicationUsage() {
			return true
		}
	}
	return false
}

// ReplicationStats holds the global in-memory replication stats
type ReplicationStats struct {
	// map of site deployment ID to site replication status
	// for site replication - maintain stats at global level
	srStats *SRStats
	// active worker stats
	workers *ActiveWorkerStat
	// queue stats cache
	qCache queueCache