# Sub Applications - Mounts { #sub-applications-mounts }

If you need to have two independent FastAPI applications, with their own independent OpenAPI and their own docs UIs, you can have a main app and "mount" one (or more) sub-application(s).

## Mounting a **FastAPI** application { #mounting-a-fastapi-application }

      description: |
        After submitting this, I commit to one of:

          * Read open questions until I find 2 where I can help someone and add a comment to help there.
          * I already hit the "watch" button in this repository to receive notifications and I commit to help at least 2 people that ask questions in the future.

 * the version the current one is wire and index compatible with.
 * On top of this, figure out which of these are unreleased and provide the branch they can be built from.
 * <p>
 * Note that in this context, currentVersion is the unreleased version this build operates on.
 * At any point in time there will surely be four such unreleased versions being worked on,
 * thus currentVersion will be one of these.
 * <p>
 * Considering:

#!groovy

pipeline {
  agent none
  // save some io during the build
  options {
    skipDefaultCheckout()
    durabilityHint('PERFORMANCE_OPTIMIZED')
    disableRestartFromStage()
  }
  stages {
    stage("Build / Test - JDK17") {
      agent { node { label 'ubuntu' } }
      steps {
        timeout(time: 210, unit: 'MINUTES') {
          checkout scm
          mavenBuild("jdk_17_latest", "")
          script {

 */

package com.google.common.collect.testing.testers;

import static com.google.common.collect.testing.features.CollectionFeature.NON_STANDARD_TOSTRING;
import static com.google.common.collect.testing.features.CollectionSize.ONE;
import static com.google.common.collect.testing.features.CollectionSize.ZERO;
import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;

    val toEvictIdleAtNs: Long
    when {
      // We had at least one OLD connection. Close the oldest one.
      earliestOldConnection != null -> {
        toEvict = earliestOldConnection
        toEvictIdleAtNs = earliestOldIdleAtNs
      }

      // We have too many EVICTABLE connections. Close the oldest one.
      evictableConnectionCount > maxIdleConnections -> {

import static com.google.common.primitives.UnsignedLongs.max;
import static com.google.common.primitives.UnsignedLongs.min;
import static com.google.common.truth.Truth.assertThat;
import static java.math.BigInteger.ONE;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.common.collect.testing.Helpers;

   */
  SUPPORTS_ADD,
  /**
   * Support for {@link ListIterator#set(Object)}; ignored for plain {@link Iterator}
   * implementations.
   */
  SUPPORTS_SET;

  /**
   * A set containing none of the optional features of the {@link Iterator} or {@link ListIterator}
   * interfaces.
   */
  public static final Set<IteratorFeature> UNMODIFIABLE = emptySet();

  /**

    SecurityScopes,
)
from fastapi.testclient import TestClient

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")


def process_auth(
    credentials: Annotated[str | None, Security(oauth2_scheme)],
    security_scopes: SecurityScopes,
):
    # This is an incorrect way of using it, this is not checking if the scopes are

from fastapi import FastAPI, Query
from fastapi.testclient import TestClient
from inline_snapshot import snapshot

app = FastAPI()


@app.get("/items/")
def read_items(q: list[int] = Query(default=None)):
    return {"q": q}


client = TestClient(app)


def test_multi_query():
    response = client.get("/items/?q=5&q=6")
    assert response.status_code == 200, response.text
    assert response.json() == {"q": [5, 6]}