* idleConnectionTimeout the timeout duration (in milliseconds) for idle connections
 *
 * <p>Methods:</p>
 * <ul>
 *   <li>{@link #expired()}: Handles the expiration of connections by closing expired and idle connections.</li>
 * </ul>
 *
 * <p>Logging:</p>
 * <ul>
 *   <li>Logs a warning if the clientConnectionManager is null.</li>
 *   <li>Logs a warning if an exception occurs during connection monitoring.</li>

```

### Connection Pool Tuning

```java
container.singleton("httpClient", HcHttpClient.class, client -> {
    client.setMaxConnections(200);          // Total connections
    client.setMaxConnectionsPerRoute(20);   // Per-host connections
    client.setConnectionTimeout(30000);     // Connection timeout
    client.setSocketTimeout(60000);         // Read timeout
});

 *   <li>DEFAULT_MAX_CONNECTION_PER_ROUTE_PROPERTY: Default maximum connections per route.</li>
 *   <li>MAX_TOTAL_CONNECTION_PROPERTY: Maximum total connections.</li>
 *   <li>TIME_TO_LIVE_TIME_UNIT_PROPERTY: Time to live unit for connections.</li>
 *   <li>TIME_TO_LIVE_PROPERTY: Time to live for connections.</li>
 * </ul>
 *
 */
public class HcHttpClient extends AbstractCrawlerClient {

    /**

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;

/**
 * FtpAuthentication class holds the authentication information for FTP connections.
 * It includes server address, port number, username, and password.
 * It also provides a method to check if the authentication matches a given FTP path.
 *
 * @author shinsuke
 */
public class FtpAuthentication {

    }

    /**
     * Gets the connection timeout in milliseconds.
     *
     * @return The connection timeout
     */
    public int getConnectTimeout() {
        return connectTimeout;
    }

    /**
     * Sets the connection timeout in milliseconds.
     *
     * @param connectTimeout The connection timeout
     */

 * </p>
 */
public class Handler extends URLStreamHandler {

    /**
     * Constructs a new Handler.
     */
    public Handler() {
        // Default constructor
    }

    /**
     * Opens a connection to the storage URL.
     *
     * @param u The URL to open a connection to

     */
    public void setMaxRetryCount(final int maxRetryCount) {
        this.maxRetryCount = maxRetryCount;
    }

    /**
     * Sets the connection timeout in milliseconds.
     *
     * @param connTimeout The connection timeout.
     */
    public void setConnTimeout(final long connTimeout) {
        this.connTimeout = connTimeout;
    }

    /**

		</developer>
	</developers>
	<issueManagement>
		<system>GitHub</system>
		<url>https://github.com/codelibs/fess-crawler/issues</url>
	</issueManagement>
	<scm>
		<connection>scm:git:******@****.***:codelibs/fess-crawler.git</connection>
		<developerConnection>scm:git:******@****.***:codelibs/fess-crawler.git</developerConnection>
		<url>******@****.***:codelibs/fess-crawler.git</url>
	  <tag>HEAD</tag>
  </scm>
	<parent>

			<email>******@****.***</email>
			<organization>CodeLibs Inc.</organization>
			<organizationUrl>https://codelibs.co</organizationUrl>
		</developer>
	</developers>
	<scm>
		<connection>scm:git:******@****.***:codelibs/fess-suggest.git</connection>
		<developerConnection>scm:git:******@****.***:codelibs/fess-suggest.git</developerConnection>
		<url>https://github.com/codelibs/fess-suggest</url>
	  <tag>HEAD</tag>
  </scm>
	<parent>

     * @param url The URL to set.
     */
    public void setUrl(final String url) {
        this.url = url;
    }

    /**
     * Sets the connection timeout.
     * @param connectionTimeout The connection timeout in milliseconds.
     */
    public void setConnectionTimeout(final Integer connectionTimeout) {
        this.connectionTimeout = connectionTimeout;
    }

    /**