Unable to set contextProgagator from application.properties

Resilience4j version: 1.3.1

Java version: openjdk 11.0.2 2019-01-15

I am trying to set up resilience4ji in a SpringBootApp. I am setting up ThreadpoolBulkhead in application.properties. As part of that I am also trying to set context propagators, however the application fails to start.

application.properties

... #Other properties of ThreadPoolBulkhead over-ridden
resilience4j.thread-pool-bulkhead.configs.default.keepAliveDuration=20ms
resilience4j.thread-pool-bulkhead.configs.default.contextPropagators=com.app.MdcContextPropagator

The MdcContextPropagator is used to pass the MDC context to between threads and is implemented as below

@Component
public class MdcContextPropagator implements ContextPropagator<Map<String, String>> {

    @Override
    public Supplier<Optional<Map<String, String>>> retrieve() {
        return () -> Optional.ofNullable(MDC.getCopyOfContextMap());
    }

    @Override
    public Consumer<Optional<Map<String, String>>> copy() {
        return (copyOfContextMap) -> copyOfContextMap.ifPresent(MDC::setContextMap);
    }

    @Override
    public Consumer<Optional<Map<String, String>>> clear() {
        return (contextMap) -> MDC.clear();
    }
}

Stacktrace for application startup failure

2020-04-19T17:55:25.220+0530 WARN   [main] x-b3-traceId= o.s.b.w.s.c.AnnotationConfigServletWebServerApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'threadPoolBulkHeadCustomizer': Invocation of init method failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'scopedTarget.threadPoolBulkheadRegistry' defined in class path resource [io/github/resilience4j/bulkhead/autoconfigure/RefreshScopedBulkheadAutoConfiguration.class]: Unsatisfied dependency expressed through method 'threadPoolBulkheadRegistry' parameter 0; nested exception is org.springframework.boot.context.properties.ConfigurationPropertiesBindException: Error creating bean with name 'resilience4j.thread-pool-bulkhead-io.github.resilience4j.bulkhead.autoconfigure.ThreadPoolBulkheadProperties': Could not bind properties to 'ThreadPoolBulkheadProperties' : prefix=resilience4j.thread-pool-bulkhead, ignoreInvalidFields=false, ignoreUnknownFields=true; nested exception is org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'resilience4j.thread-pool-bulkhead.configs.default' to io.github.resilience4j.common.bulkhead.configuration.ThreadPoolBulkheadConfigurationProperties$InstanceProperties 
...
***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to bind properties under 'resilience4j.thread-pool-bulkhead.configs.default' to io.github.resilience4j.common.bulkhead.configuration.ThreadPoolBulkheadConfigurationProperties$InstanceProperties:

    Reason: No setter found for property: context-propagators

If I remove the contextPropagator part from my application.properties file I can start the application. However I would like to use the properties file to set contextPropagator, but not possible to do

[RobWin]

I quickly added the method

[RobWin]

Yes, a PR is welcome. Please just deprecate the old method and add a correct one.