Package fr.becpg.repo.helper

Class RestTemplateHelper

java.lang.Object

fr.becpg.repo.helper.RestTemplateHelper

public final class RestTemplateHelper
extends Object

Helper class for RestTemplate configuration with optimized connection pooling, DNS cache management, and DNS resolution logging.

Author:

matthieu

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	RestTemplateHelper.DnsLoggingRequestFactory	Custom request factory that logs DNS resolution and adds standard headers.

Field Summary

Fields

Modifier and Type	Field	Description
private static final org.apache.hc.core5.util.Timeout	CONNECTION_TIMEOUT	Constant CONNECTION_TIMEOUT
private static final int	CONNECTION_TTL_SECONDS	Constant CONNECTION_TTL_SECONDS=5
private static final org.apache.hc.core5.util.Timeout	DEFAULT_SOCKET_TIMEOUT	Constant DEFAULT_SOCKET_TIMEOUT
private static final org.springframework.web.client.RestTemplate	defaultRestTemplate	Constant defaultRestTemplate
private static final org.slf4j.Logger	logger	Constant logger
private static final org.apache.hc.core5.util.Timeout	LONG_SOCKET_TIMEOUT	Constant LONG_SOCKET_TIMEOUT
private static final org.springframework.web.client.RestTemplate	longTimeoutRestTemplate	Constant longTimeoutRestTemplate
private static final int	MAX_CONNECTIONS_PER_ROUTE	Constant MAX_CONNECTIONS_PER_ROUTE=20
private static final int	MAX_TOTAL_CONNECTIONS	Constant MAX_TOTAL_CONNECTIONS=50

Constructor Summary

Constructors

Modifier	Constructor	Description
private	RestTemplateHelper()	Constructor for RestTemplateHelper.

Method Summary

Modifier and Type	Method	Description
private static org.apache.hc.client5.http.config.ConnectionConfig	buildConnectionConfig(org.apache.hc.core5.util.Timeout socketTimeout)	Builds connection configuration with specified timeouts.
static String[]	checkDnsResolution(String hostname)	Performs manual DNS resolution check for a hostname.
private static org.apache.hc.client5.http.impl.classic.CloseableHttpClient	createHttpClient(org.apache.hc.core5.util.Timeout socketTimeout)	Creates a configured HTTP client with connection pooling and timeout settings.
private static org.springframework.web.client.RestTemplate	createRestTemplate(org.apache.hc.core5.util.Timeout socketTimeout)	Creates a configured RestTemplate with the specified socket timeout.
static org.springframework.web.client.RestTemplate	getRestTemplate()	Gets the default RestTemplate instance with standard timeout settings.
static org.springframework.web.client.RestTemplate	getRestTemplateLongTimeout()	Gets the RestTemplate instance with extended timeout settings for long-running operations.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

logger

private static final org.slf4j.Logger logger

Constant logger

MAX_TOTAL_CONNECTIONS

private static final int MAX_TOTAL_CONNECTIONS

Constant MAX_TOTAL_CONNECTIONS=50

See Also:

• Constant Field Values

MAX_CONNECTIONS_PER_ROUTE

private static final int MAX_CONNECTIONS_PER_ROUTE

Constant MAX_CONNECTIONS_PER_ROUTE=20

See Also:

• Constant Field Values

CONNECTION_TTL_SECONDS

private static final int CONNECTION_TTL_SECONDS

Constant CONNECTION_TTL_SECONDS=5

See Also:

• Constant Field Values

CONNECTION_TIMEOUT

private static final org.apache.hc.core5.util.Timeout CONNECTION_TIMEOUT

Constant CONNECTION_TIMEOUT

DEFAULT_SOCKET_TIMEOUT

private static final org.apache.hc.core5.util.Timeout DEFAULT_SOCKET_TIMEOUT

Constant DEFAULT_SOCKET_TIMEOUT

LONG_SOCKET_TIMEOUT

private static final org.apache.hc.core5.util.Timeout LONG_SOCKET_TIMEOUT

Constant LONG_SOCKET_TIMEOUT

defaultRestTemplate

private static final org.springframework.web.client.RestTemplate defaultRestTemplate

Constant defaultRestTemplate

longTimeoutRestTemplate

private static final org.springframework.web.client.RestTemplate longTimeoutRestTemplate

Constant longTimeoutRestTemplate

Constructor Details

RestTemplateHelper

private RestTemplateHelper()

Constructor for RestTemplateHelper.

Method Details

getRestTemplate

public static org.springframework.web.client.RestTemplate getRestTemplate()

Gets the default RestTemplate instance with standard timeout settings.

Returns:

configured RestTemplate instance

getRestTemplateLongTimeout

public static org.springframework.web.client.RestTemplate getRestTemplateLongTimeout()

Gets the RestTemplate instance with extended timeout settings for long-running operations.

Returns:

configured RestTemplate instance with long timeout

createRestTemplate

private static org.springframework.web.client.RestTemplate createRestTemplate(org.apache.hc.core5.util.Timeout socketTimeout)

Creates a configured RestTemplate with the specified socket timeout.

Parameters:

socketTimeout - the socket timeout to apply

Returns:

configured RestTemplate instance

createHttpClient

private static org.apache.hc.client5.http.impl.classic.CloseableHttpClient createHttpClient(org.apache.hc.core5.util.Timeout socketTimeout)

Creates a configured HTTP client with connection pooling and timeout settings.

Parameters:

socketTimeout - the socket timeout to apply

Returns:

configured CloseableHttpClient

buildConnectionConfig

private static org.apache.hc.client5.http.config.ConnectionConfig buildConnectionConfig(org.apache.hc.core5.util.Timeout socketTimeout)

Builds connection configuration with specified timeouts.

Parameters:

socketTimeout - the socket timeout to apply

Returns:

configured ConnectionConfig

checkDnsResolution

public static String[] checkDnsResolution(String hostname)

Performs manual DNS resolution check for a hostname.

Parameters:

hostname - the hostname to resolve

Returns:

array of resolved IP addresses, or empty array if resolution fails