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Joris Kuipers jkuipers

  • Trifork
  • The Netherlands, near Amsterdam
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@jkuipers
jkuipers / BufferedClientHttpResponseWrapper.java
Created March 25, 2025 08:38
Wrapper for {@link ClientHttpResponse} that ensures clients can repeatedly read the given response body
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatusCode;
import org.springframework.http.client.ClientHttpResponse;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* Wrapper for {@link ClientHttpResponse} that ensures clients can repeatedly read the given response body.
@jkuipers
jkuipers / AbstractJsonResponseErrorHandler.java
Last active March 22, 2025 10:04
Spring ResponseErrorHandler for JSON error responses
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatusCode;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.lang.NonNull;
import org.springframework.web.client.DefaultResponseErrorHandler;
@jkuipers
jkuipers / AbstractTokenManager.java
Created March 20, 2025 10:19
Template class for managing authentication tokens while preventing thundering herd problems on token expiry
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public abstract class AbstractTokenManager<T> {
private static final long MIN_MILLIS_INDICATING_REFRESHED = 10_000L;
@jkuipers
jkuipers / OpenApiToolEnumMappingStrategy.java
Last active November 29, 2024 15:31
MapStruct EnumMappingStrategy to deal with enums generated by the OpenAPI Tools
package nl.trifork.mapstruct;
import org.mapstruct.ap.spi.DefaultEnumMappingStrategy;
import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.AnnotationValue;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Name;
import javax.lang.model.element.TypeElement;
import java.io.IOException;
@jkuipers
jkuipers / TracingSqsListenerConfig.java
Last active November 7, 2023 08:34
Configuration and code to add tracing support to Spring Cloud AWS's message listeners
@AutoConfiguration(before = io.awspring.cloud.autoconfigure.sqs.SqsAutoConfiguration.class,
afterName = "org.springframework.boot.actuate.autoconfigure.tracing.BraveAutoConfiguration")
@ConditionalOnBean(Tracing.class)
public class SqsTracingAutoConfiguration {
@Bean(name = SqsBeanNames.SQS_LISTENER_ANNOTATION_BEAN_POST_PROCESSOR_BEAN_NAME)
TracingSqsListenerAnnotationBeanPostProcessor tracingSLABPP(Tracing tracing) {
return new TracingSqsListenerAnnotationBeanPostProcessor(tracing);
}
static class TracingSqsListenerAnnotationBeanPostProcessor extends SqsListenerAnnotationBeanPostProcessor {
@jkuipers
jkuipers / TracingSqsTemplateConfig.java
Created November 7, 2023 08:23
Adds tracing headers to messages sent via Spring Cloud AWS's SqsTemplate
@Bean
SqsTemplate sqsTemplate(SqsAsyncClient sqsAsyncClient, ObjectMapper objectMapper, Tracing tracing) {
var injector = tracing.propagation().injector(
(Propagation.Setter<Map<String, Object>, String>) (headersMap, key, value) -> {
// only propagate the traceparent attr, no additional baggage, since SQS only supports a max of 10 attrs
if (key.startsWith("trace")) headersMap.put(key, value);
});
var converter = new SqsMessagingMessageConverter() {
@Override
public Message fromMessagingMessage(org.springframework.messaging.Message<?> message, MessageConversionContext context) {
@jkuipers
jkuipers / HttpClientMetricsConfig.java
Created March 14, 2023 07:55
Spring bean definition that ensures that client.name tags are included in HTTP client metrics again
/**
* Starting with Boot 3, the {@code client.name} tag is no longer included by default
* in the {@code http.client.requests} metrics. Restore it by overriding
* {@link DefaultClientRequestObservationConvention#getLowCardinalityKeyValues(ClientRequestObservationContext)}.
*
* @return {@link ClientRequestObservationConvention} that adds the {@code client.name} to the low cardinality key-values.
*/
@Bean
ClientRequestObservationConvention clientNameAddingObservationConvention() {
return new DefaultClientRequestObservationConvention() {
@jkuipers
jkuipers / TomcatAutoConfiguration.java
Created January 14, 2022 14:32
Spring Boot (auto-)configuration class that defines an additional Tomcat Connector for health checks
import org.apache.catalina.connector.Connector;
import org.apache.coyote.AbstractProtocol;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.server.WebServerFactoryCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
@jkuipers
jkuipers / OpenJ9MemoryMetrics.java
Created January 14, 2022 14:26
Micrometer.io heap statistics for OpenJ9 VMs
import io.micrometer.core.instrument.Gauge;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.binder.BaseUnits;
import io.micrometer.core.instrument.binder.MeterBinder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.ReflectionUtils;
import java.lang.reflect.Method;
@jkuipers
jkuipers / MDCPropagatingTaskDecorator.java
Created January 5, 2022 08:25
Spring TaskDecorator that propagates an SLF4J MDC to the runner's thread. Accounts for the possibility that the runner's thread is actually the same as the caller's thread by restoring the old MDC context, if existing.
import org.slf4j.MDC;
import org.springframework.core.task.TaskDecorator;
import java.util.Map;
public class MDCPropagatingTaskDecorator implements TaskDecorator {
@Override
public Runnable decorate(Runnable runnable) {
Map<String, String> callerContext = MDC.getCopyOfContextMap();