That's why the current versions are still `0.x.x`, this reflects that each version could potentially have breaking changes. This follows the <a href="https://semver.org/" class="external-link" target="_blank">Semantic Versioning</a> conventions.

You can create production applications with **FastAPI** right now (and you have probably been doing it for some time), you just have to make sure that you use a version that works correctly with the rest of your code.

        }

        int have = this.handle.sendrecv(buf, off, length, inB, getMaxRecv());

        final int fraglen = Encdec.dec_uint16le(inB, 8);
        if (fraglen > getMaxRecv()) {
            throw new IOException("Unexpected fragment length: " + fraglen);
        }

        while (have < fraglen) {
            final int r = this.handle.recv(inB, have, fraglen - have);
            if (r == 0) {

        assertEquals(1, stats.getRdmaReads(), "Should have 1 read operation");
        assertEquals(1, stats.getRdmaWrites(), "Should have 1 write operation");
        assertEquals(1, stats.getRdmaSends(), "Should have 1 send operation");
        assertEquals(1, stats.getRdmaReceives(), "Should have 1 receive operation");
        assertEquals(5120, stats.getBytesTransferred(), "Should have transferred 5KB total");

Using these ideas, JWT can be used for way more sophisticated scenarios.

In those cases, several of those entities could have the same ID, let's say `foo` (a user `foo`, a car `foo`, and a blog post `foo`).

        assertEquals(32, derived1.length, "Derived key should have correct length");
        assertEquals(32, derived2.length, "Derived key should have correct length");
        assertEquals(32, derived3.length, "Derived key should have correct length");

        assertFalse(Arrays.equals(derived1, derived2), "Different labels should produce different keys");

            continue@eachQueue
          }

          // If we already have more than one task, that's enough work for now. Stop searching.
          readyTask != null -> {
            multipleReadyTasks = true
            break@eachQueue
          }

          // We have a task to execute when we complete the loop.
          else -> {
            readyTask = candidate
          }

<blockquote markdown="1">

**FastAPI** wouldn't exist if not for the previous work of others.

There have been many tools created before that have helped inspire its creation.

I have been avoiding the creation of a new framework for several years. First I tried to solve all the features covered by **FastAPI** using many different frameworks, plug-ins, and tools.

  /*
   * Ideally, this class would have exposed only constructors that require a non-null cause. See
   * https://github.com/jspecify/jspecify-reference-checker/blob/61aafa4ae52594830cfc2d61c8b113009dbdb045/src/main/java/com/google/jspecify/nullness/NullSpecTransfer.java#L789
   * and https://github.com/jspecify/jspecify/issues/490.
   *
   * (That would also have ensured that its cause was always an Error, rather than possibly another

        assertNotNull("Parameter annotations should exist", paramAnnotations);
        assertEquals("Should have one parameter", 1, paramAnnotations.length);
        assertEquals("Parameter should have one annotation", 1, paramAnnotations[0].length);

        final UriType annotation = (UriType) paramAnnotations[0][0];

A PR should have a specific use case that it is solving.

* If the PR is for a feature, it should have docs.
    * Unless it's a feature we want to discourage, like support for a corner case that we don't want users to use.
* The docs should include a source example file, not write Python directly in Markdown.