gistfile1.java

package com.hubspot.jersey.dropwizard.managed;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.jaxrs.cfg.JaxRSFeature;
import com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.yammer.dropwizard.config.Environment;
import com.yammer.dropwizard.lifecycle.Managed;

public class ObjectMapperManaged implements Managed {
  private final Provider<Environment> environmentProvider;
  private final ObjectMapper objectMapper;

  @Inject
  public ObjectMapperManaged(Provider<Environment> environmentProvider,
                             ObjectMapper objectMapper) {
    this.environmentProvider = environmentProvider;
    this.objectMapper = objectMapper;
  }

  @Override
  public void start() throws Exception {
    for (Object o : environmentProvider.get().getJerseyResourceConfig().getSingletons()) {
      if (o instanceof JacksonJsonProvider) {
        JacksonJsonProvider jsonProvider = (JacksonJsonProvider) o;
        jsonProvider.setMapper(objectMapper);
        jsonProvider.disable(JaxRSFeature.ALLOW_EMPTY_INPUT);
      }
    }
  }

  @Override
  public void stop() throws Exception {
    // do nothing
  }
}