They tend to require more complex configurations, a message/job queue manager, like RabbitMQ or Redis, but they allow you to run background tasks in multiple processes, and especially, in multiple servers.

## コンテキストマネージャ { #context-managers }

### 「コンテキストマネージャ」とは { #what-are-context-managers }

「コンテキストマネージャ」とは、`with`文の中で使用できるPythonオブジェクトのことです。

例えば、[ファイルを読み込むには`with`を使用することができます](https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files):

```Python

import java.util.concurrent.Executor;
import java.util.logging.Level;
import org.jspecify.annotations.Nullable;

/**
 * A support class for {@code ListenableFuture} implementations to manage their listeners. An
 * instance contains a list of listeners, each with an associated {@code Executor}, and guarantees
 * that every {@code Runnable} that is {@linkplain #add added} will be executed after {@link

import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing failure URLs that occur during web crawling.
 * Provides functionality to store, retrieve, and manage failed crawling attempts
 * with their associated error information.
 */
public class FailureUrlService {

    /** Logger instance for this class */

            }
            buffer.append(proxy.getHost()).append(':').append(proxy.getPort()).append('>');
        }

        // consider the username&password because a repo manager might block artifacts depending on authorization
        Authentication auth = repository.getAuthentication();
        if (auth != null) {
            int hash = (auth.getUsername() + auth.getPassword()).hashCode();

import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

/**
 * API Manager for RAG chat endpoints with SSE streaming support.
 *
 * @author FessProject
 */
public class ChatApiManager extends BaseApiManager {

    private static final Logger logger = LogManager.getLogger(ChatApiManager.class);

import jakarta.annotation.Resource;

/**
 * Service class for managing job logs in the Fess application.
 * Provides functionality to create, read, update, and delete job log entries,
 * as well as manage job status and perform cleanup operations.
 */
public class JobLogService {

    /**
     * Behavior class for job log database operations.
     */
    @Resource
    protected JobLogBhv jobLogBhv;

    /**

The drives should all be of approximately the same size.

## Get Started with MinIO in Erasure Code

### 1. Prerequisites

import org.opensearch.index.query.functionscore.ScoreFunctionBuilders;

import jakarta.annotation.PostConstruct;

/**
 * KeyMatchHelper is a helper class for KeyMatch feature.
 * It manages KeyMatch instances and provides methods to build queries for boosting documents.
 */
public class KeyMatchHelper extends AbstractConfigHelper {
    private static final Logger logger = LogManager.getLogger(KeyMatchHelper.class);

import jakarta.annotation.PostConstruct;
import jakarta.servlet.http.HttpServletRequest;

/**
 * Helper class for rate limiting functionality.
 * Implements a sliding window algorithm for request counting
 * and manages IP-based blocking using Guava Cache for automatic expiration.
 */
public class RateLimitHelper {

    private static final Logger logger = LogManager.getLogger(RateLimitHelper.class);

    /**