```Python hl_lines="22-24"
{!../../../docs_src/extending_openapi/tutorial001.py!}
```

### Cache the OpenAPI schema

You can use the property `.openapi_schema` as a "cache", to store your generated schema.

That way, your application won't have to generate the schema every time a user opens your API docs.

It will be generated only once, and then the same cached schema will be used for the next requests.

```Python hl_lines="13-14  25-26"

    open fun headers(headers: Headers) = commonHeaders(headers)

    /**
     * Sets this request's `Cache-Control` header, replacing any cache control headers already
     * present. If [cacheControl] doesn't define any directives, this clears this request's
     * cache-control headers.
     */
    open fun cacheControl(cacheControl: CacheControl): Builder = commonCacheControl(cacheControl)

    a bug where a shared connection pool did not guarantee shared connections in some cases.
 *  Fix: Prefer the server's response body on all conditional cache misses. Previously we would
    return the cached response's body if it had a newer `Last-Modified` date.
 *  Fix: Update the stored timestamp on conditional cache hits.
 *  New: Optimized HTTP/2 request header encoding. More headers are HPACK-encoded and string
    literals are now Huffman-encoded.

    server!

 *  **Cache improvements.** This release fixes some severe cache problems
    including a bug where the cache could be corrupted upon certain access
    patterns. We also fixed a bug where the cache was being cleared due to a
    corrupted journal. We've added APIs to configure a request's `Cache-Control`
    headers, and to manually clear the cache.

```java
/** Dangerous interceptor that rewrites the server's cache-control header. */
private static final Interceptor REWRITE_CACHE_CONTROL_INTERCEPTOR = new Interceptor() {
  @Override public Response intercept(Interceptor.Chain chain) throws IOException {

#      Ex. macos_arm64      -- arm64 MacOS platform
# 3. Add modifiers. Some modifiers for local execution are:
#      Ex. disk_cache -- Use a local cache
#      Ex. public_cache -- Use TF's public cache (read-only)
#      Ex. public_cache_push -- Use TF's public cache (read and write, Googlers only)
#      Ex. rbe        -- Use RBE for faster builds (Googlers only; see below)

In an advanced scenario where you know you need the dependency to be called at every step (possibly multiple times) in the same request instead of using the "cached" value, you can set the parameter `use_cache=False` when using `Depends`:

=== "Python 3.8+"

import org.jetbrains.kotlin.analysis.api.descriptors.symbols.psiBased.base.KtFe10PsiSymbol
import org.jetbrains.kotlin.analysis.api.descriptors.utils.cached
import org.jetbrains.kotlin.analysis.api.lifetime.withValidityAssertion
import org.jetbrains.kotlin.analysis.api.symbols.KtAnonymousObjectSymbol
import org.jetbrains.kotlin.analysis.api.symbols.pointers.KtPsiBasedSymbolPointer

import org.jetbrains.kotlin.analysis.api.fir.types.KtFirUsualClassType
import org.jetbrains.kotlin.analysis.api.fir.utils.ValidityAwareCachedValue
import org.jetbrains.kotlin.analysis.api.fir.utils.cached
import org.jetbrains.kotlin.analysis.api.lifetime.KtLifetimeToken
import org.jetbrains.kotlin.analysis.api.types.KtType
import org.jetbrains.kotlin.fir.BuiltinTypes
import org.jetbrains.kotlin.fir.types.impl.ConeClassLikeTypeImpl

import org.jetbrains.kotlin.analysis.api.descriptors.symbols.psiBased.base.ktSymbolOrigin
import org.jetbrains.kotlin.analysis.api.descriptors.symbols.psiBased.base.ktVisibility
import org.jetbrains.kotlin.analysis.api.descriptors.utils.cached
import org.jetbrains.kotlin.analysis.api.impl.base.annotations.KtEmptyAnnotationsList
import org.jetbrains.kotlin.analysis.api.impl.base.symbols.pointers.KtPropertySetterSymbolPointer