Attempt to load config files with both `yaml` and `yml` suffix

dd-java-agent/src/main/java/com/datadoghq/trace/agent/InstrumentationChecker.java

@@ -17,7 +17,7 @@ import lombok.extern.slf4j.Slf4j;
 @Slf4j
 public class InstrumentationChecker {
 
-  private static final String CONFIG_FILE = "dd-trace-supported-framework.yaml";
+  private static final String CONFIG_FILE = "dd-trace-supported-framework";
   private final Map<String, List<Map<String, String>>> rules;
   private final Map<String, String> frameworks;
 

dd-java-agent/src/test/java/com/datadoghq/trace/agent/InstrumentationCheckerTest.java

@@ -13,9 +13,9 @@ public class InstrumentationCheckerTest {
 
   @Before
   public void setup() {
-    Map<String, List<Map<String, String>>> rules =
-        FactoryUtils.loadConfigFromResource("supported-version-test.yaml", Map.class);
-    Map<String, String> frameworks =
+    final Map<String, List<Map<String, String>>> rules =
+        FactoryUtils.loadConfigFromResource("supported-version-test", Map.class);
+    final Map<String, String> frameworks =
         new HashMap<String, String>() {
           {
             put("artifact-1", "1.2.3.1232");
@@ -30,7 +30,7 @@ public class InstrumentationCheckerTest {
   @Test
   public void testRules() throws Exception {
 
-    List<String> rules = InstrumentationChecker.getUnsupportedRules();
+    final List<String> rules = InstrumentationChecker.getUnsupportedRules();
     assertThat(rules.size()).isEqualTo(3);
     assertThat(rules)
         .containsExactlyInAnyOrder(

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

@@ -11,7 +11,7 @@ public class DDDecoratorsFactory {
 
   public static String DECORATORS_PACKAGE = "com.datadoghq.trace.integration.";
 
-  public static final String CONFIG_PATH = "dd-trace-decorators.yaml";
+  public static final String CONFIG_PATH = "dd-trace-decorators";
 
   /**
    * Create decorators from configuration

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

@@ -20,7 +20,7 @@ import lombok.extern.slf4j.Slf4j;
 public class DDTracerFactory {
 
   public static final String SYSTEM_PROPERTY_CONFIG_PATH = "dd.trace.configurationFile";
-  public static final String CONFIG_PATH = "dd-trace.yaml";
+  public static final String CONFIG_PATH = "dd-trace";
 
   private static final String DD_AGENT_WRITER_TYPE = DDAgentWriter.class.getSimpleName();
   private static final String LOGGING_WRITER_TYPE = LoggingWriter.class.getSimpleName();

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

@@ -5,7 +5,6 @@ import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
 import java.io.File;
 import java.io.IOException;
 import java.net.URL;
-import java.util.Enumeration;
 import lombok.extern.slf4j.Slf4j;
 
 @Slf4j
@@ -31,14 +30,25 @@ public class FactoryUtils {
 
   public static <A> A loadConfigFromResource(
       final String resourceName, final Class<A> targetClass) {
-    final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
     A config = null;
+
+    // Try loading both suffixes
+    if (!resourceName.endsWith(".yaml") && !resourceName.endsWith(".yml")) {
+      config = loadConfigFromResource(resourceName + ".yaml", targetClass);
+      if (config == null) {
+        config = loadConfigFromResource(resourceName + ".yml", targetClass);
+      }
+      if (config != null) {
+        return config;
+      }
+    }
+
     try {
-      final Enumeration<URL> iter = classLoader.getResources(resourceName);
-      if (iter.hasMoreElements()) {
-        final URL url = iter.nextElement();
-        log.info("Loading config from resource " + url);
-        config = objectMapper.readValue(url.openStream(), targetClass);
+      final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+      final URL resource = classLoader.getResource(resourceName);
+      if (resource != null) {
+        log.info("Loading config from resource " + resource);
+        config = objectMapper.readValue(resource.openStream(), targetClass);
       }
     } catch (final IOException e) {
       log.warn("Could not load configuration file {}.", resourceName);

dd-trace/src/test/java/com/datadoghq/trace/resolver/DDTracerFactoryTest.java

@@ -12,7 +12,7 @@ public class DDTracerFactoryTest {
   @Test
   public void testDefaults() throws Exception {
     final TracerConfig tracerConfig =
-        FactoryUtils.loadConfigFromResource("dd-trace-default.yaml", TracerConfig.class);
+        FactoryUtils.loadConfigFromResource("dd-trace-default", TracerConfig.class);
 
     assertThat(tracerConfig.getWriter()).isNotNull();
     assertThat(tracerConfig.getSampler()).isNotNull();
@@ -27,7 +27,7 @@ public class DDTracerFactoryTest {
   @Test
   public void test() throws Exception {
     TracerConfig tracerConfig =
-        FactoryUtils.loadConfigFromResource("dd-trace-1.yaml", TracerConfig.class);
+        FactoryUtils.loadConfigFromResource("dd-trace-1", TracerConfig.class);
 
     assertThat(tracerConfig.getWriter()).isNotNull();
     assertThat(tracerConfig.getSampler()).isNotNull();
@@ -38,7 +38,7 @@ public class DDTracerFactoryTest {
     assertThat(tracerConfig.getSampler().getType()).isEqualTo(AllSampler.class.getSimpleName());
     assertThat(tracerConfig.getSampler().getRate()).isNull();
 
-    tracerConfig = FactoryUtils.loadConfigFromResource("dd-trace-2.yaml", TracerConfig.class);
+    tracerConfig = FactoryUtils.loadConfigFromResource("dd-trace-2", TracerConfig.class);
     assertThat(tracerConfig.getWriter()).isNotNull();
     assertThat(tracerConfig.getDefaultServiceName()).isEqualTo("java-app");
     assertThat(tracerConfig.getWriter().getHost("localhost")).isEqualTo("localhost");