# Bigger Applications - Multiple Files

If you are building an application or a web API, it's rarely the case that you can put everything in a single file.

**FastAPI** provides a convenience tool to structure your application while keeping all the flexibility.

/// info

If you come from Flask, this would be the equivalent of Flask's Blueprints.

///

## An example file structure

Let's say you have a file structure like this:

```

 * {{{./cli.html}CLI options}},

 * {{{./logging.html}logging API}}.

 * since 3.3.1 (see {{{/docs/3.3.1/release-notes.html#Core_Extensions}3.3.1 release notes}} for more details),
   per project settings can be defined by files in <<<.mvn/>>> directory:

   * <<<.mvn/jvm.config>>> containing jvm options,

   * <<<.mvn/maven.config>>> containing Maven command-line parameter,

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Immutable;

import static org.apache.maven.api.ExtensibleEnums.projectScope;

/**
 * Project scope.
 * Defines the type of source files to compile, usually either the one that compose the output package
 * (i.e. the <i>main</i> artifact) or the ones that will be used when building <i>tests</i>).
 * <p>

)

const (
	// to reliably identify kubelet healthprobes from inside the pod (versus standard kube-proxy traffic,
	// since the IP is normally the same), we SNAT identified host probes in the host netns to a fixed
	// APIPA/"link-local" IP.
	//
	// It doesn't matter what this IP is, so long as it's not routable and doesn't collide with anything else.
	//

 *     [chunked][newChunkedSink].
 *  3. Write to and then close that sink.
 *  4. [Read response headers][readResponseHeaders].
 *  5. Open a source to read the response body. Either [fixed-length][newFixedLengthSource],
 *     [chunked][newChunkedSource] or [unknown][newUnknownLengthSource].
 *  6. Read from and close that source.
 *

// []StorageAPI returned by listOnlineDisks. Returns,
//
// - disks which have all parts specified in the latest xl.meta.
//
//   - slice of errors about the state of data files on disk - can have
//     a not-found error or a hash-mismatch error.
func disksWithAllParts(ctx context.Context, onlineDisks []StorageAPI, partsMetadata []FileInfo,

   * tests of {@link CopyOnWriteArraySet} can suppress it with {@code
   * FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6570575">Sun bug 6570575</a> is fixed.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getListIteratorFullyModifiableMethod() {
    return getMethod(ListListIteratorTester.class, "testListIterator_fullyModifiable");
  }

It will also **download** files for other packages that FastAPI depends on.

Then it will **extract** all those files and put them in a directory in your computer.

By default, it will put those files downloaded and extracted in the directory that comes with your Python installation, that's the **global environment**.

   * system does not support {@link SecureDirectoryStream}).
   *
   * <p><b>Warning:</b> On a file system that supports symbolic links, it is possible for an
   * insecure recursive delete to delete files and directories that are <i>outside</i> the directory
   * being deleted. This can happen if, after checking that a file is a directory (and not a

@Tag("it")
public class LogTests extends CrudTestBase {

    private static final String NAME_PREFIX = "logTest_";
    private static final String API_PATH = "/api/admin/log";
    private static final String LIST_ENDPOINT_SUFFIX = "files";
    private static final String ITEM_ENDPOINT_SUFFIX = "file";

    private static final String KEY_PROPERTY = "";

    @Override
    protected String getNamePrefix() {
        return NAME_PREFIX;
    }