Missing factoryutils

dd-trace/src/main/java/com/datadoghq/trace/resolver/FactoryUtils.java

@@ -0,0 +1,34 @@
+package com.datadoghq.trace.resolver;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.Enumeration;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
+
+public class FactoryUtils {
+	private final static Logger logger = LoggerFactory.getLogger(FactoryUtils.class);
+
+	private static final ObjectMapper objectMapper = new ObjectMapper(new YAMLFactory());
+	
+	public static <A> A loadConfigFromResource(String resourceName, Class<A> targetClass){
+		ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+		A config = null;
+		try {
+			Enumeration<URL> iter = classLoader.getResources(resourceName);
+			while (iter.hasMoreElements()) {
+				config = objectMapper.readValue(iter.nextElement().openStream(), targetClass);
+
+				break; // ONLY the closest resource file is taken into account
+			}
+		} catch (IOException e) {
+			logger.warn("Could not load configuration file {}.", resourceName);
+			logger.error("Error when loading config file", e);
+		}
+		return config;
+	}
+}