> NOTE: Bucket versioning is automatically enabled for all new and existing buckets on all replicated sites.

The following Bucket features will **not be replicated**, is designed to differ between sites:

- Bucket notification configuration
- Bucket lifecycle (ILM) configuration

## Pre-requisites

    RemovalListener<Integer, Integer> countingListener =
        new RemovalListener<Integer, Integer>() {
          @Override
          public void onRemoval(RemovalNotification<Integer, Integer> notification) {
            switch (notification.getCause()) {
              case EXPIRED:
                stats[0]++;
                break;
              case EXPLICIT:
                stats[1]++;
                break;

	err    error
}

// healRoutine receives heal tasks, to heal buckets, objects and format.json
type healRoutine struct {
	tasks   chan healTask
	workers int
}

func activeListeners() int {
	// Bucket notification and http trace are not costly, it is okay to ignore them
	// while counting the number of concurrent connections
	return int(globalHTTPListen.Subscribers()) + int(globalTrace.Subscribers())
}

						</ul>
					</div>
				</div>
			</nav>
		</header>

		<main id="content" class="container">
			<h2>
				<la:message key="labels.advance_search_title" />
			</h2>
			<div class="notification">${notification}</div>
			<div>
				<la:info id="msg" message="true">
					<div class="alert alert-info">${msg}</div>
				</la:info>

{!../../docs_src/background_tasks/tutorial001.py!}
```

`.add_task()` 📨 ❌:

* 📋 🔢 🏃 🖥 (`write_notification`).
* 🙆 🔁 ❌ 👈 🔜 🚶‍♀️ 📋 🔢 ✔ (`email`).
* 🙆 🇨🇻 ❌ 👈 🔜 🚶‍♀️ 📋 🔢 (`message="some notification"`).

## 🔗 💉

⚙️ `BackgroundTasks` 👷 ⏮️ 🔗 💉 ⚙️, 👆 💪 📣 🔢 🆎 `BackgroundTasks` 💗 🎚: *➡ 🛠️ 🔢*, 🔗 (☑), 🎧-🔗, ♒️.

**FastAPI** 💭 ⚫️❔ 🔠 💼 & ❔ 🏤-⚙️ 🎏 🎚, 👈 🌐 🖥 📋 🔗 👯‍♂️ & 🏃 🖥 ⏮️:

* Любое упорядоченное количество аргументов, которые принимает функция (`email`).
* Любое количество именованных аргументов, которые принимает функция (`message="some notification"`).

## Встраивание зависимостей

   * all values is returned.
   *
   */
  CacheStats stats();

  /**
   * Returns a view of the entries stored in this cache as a thread-safe map. Modifications made to
   * the map directly affect the cache.
   *
   * <p>Iterators from the returned map are at least <i>weakly consistent</i>: they are safe for

	if m.Flags&FlagSubroute != 0 {
		if len(h) < 32 {
			return nil, nil, fmt.Errorf("want subroute len 32, got %v", len(h))
		}
		subID := (*[32]byte)(h[len(h)-32:])
		sub = (*subHandlerID)(subID)
		// Add if more modifications to h is needed
		h = h[:len(h)-32]
	}
	return sub, h, nil
}

// setZeroPayloadFlag will clear or set the FlagPayloadIsZero if
// m.Payload is length 0, but not nil.

# `VERSION` parameter.
# Note: 'Templatizing' this and the other conditional branches would require
# defining several variables (version, os, path) making it difficult to maintain
# and extend for future modifications.
case "${VERSION}" in
devtoolset-7)
  # Download binary glibc 2.12 shared library release.
  wget "http://old-releases.ubuntu.com/ubuntu/pool/main/e/eglibc/libc6_2.12.1-0ubuntu6_amd64.deb" && \

# `VERSION` parameter.
# Note: 'Templatizing' this and the other conditional branches would require
# defining several variables (version, os, path) making it difficult to maintain
# and extend for future modifications.
mkdir -p glibc-src
mkdir -p glibc-build
cd glibc-src
wget --retry-connrefused --waitretry=1 --read-timeout=20 --timeout=15 --tries=5 "https://vault.centos.org/centos/7/os/Source/SPackages/glibc-2.17-317.el7.src.rpm"