APMRestEasyFilter.java

package eu.dindoffer.apm.example;

import co.elastic.apm.api.ElasticApm;
import org.jboss.resteasy.core.ResourceMethodInvoker;
import org.jboss.resteasy.core.interception.PostMatchContainerRequestContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.ext.Provider;
import java.io.IOException;

@Provider
public class APMRestEasyFilter implements ContainerRequestFilter {
    
    private static final Logger LOG = LoggerFactory.getLogger(APMRestEasyFilter.class);

    @Override
    public void filter(ContainerRequestContext requestContext) throws IOException {
        PostMatchContainerRequestContext matchedContext = (PostMatchContainerRequestContext) requestContext;
        ResourceMethodInvoker resourceMethod = matchedContext.getResourceMethod();
        String transactionName = resourceMethod.getResourceClass().getSimpleName() + '#' + resourceMethod.getMethod().getName();
        LOG.warn("APMFilter method name {}", transactionName);
        ElasticApm.currentTransaction().setName(transactionName);
    }
}