Simplify unknown compression handling

dd-java-agent/agent-profiling/profiling-uploader/src/main/java/com/datadog/profiling/uploader/CompressionType.java

@@ -1,5 +1,8 @@
 package com.datadog.profiling.uploader;
 
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
 enum CompressionType {
   /** No compression */
   OFF,
@@ -8,13 +11,11 @@ enum CompressionType {
   /** Lower compression ratio with less CPU overhead * */
   LOW,
   /** Better compression ratio for the price of higher CPU usage * */
-  MEDIUM,
-  /** Unknown compression config value */
-  UNKNOWN;
+  MEDIUM;
 
-  static CompressionType of(final String type) {
+  static CompressionType of(String type) {
     if (type == null) {
-      return UNKNOWN;
+      type = "";
     }
 
     switch (type.toLowerCase()) {
@@ -27,7 +28,8 @@ enum CompressionType {
       case "medium":
         return MEDIUM;
       default:
-        return UNKNOWN;
+        log.warn("Unrecognizable compression type: {}. Defaulting to 'on'.", type);
+        return ON;
     }
   }
 }

dd-java-agent/agent-profiling/profiling-uploader/src/main/java/com/datadog/profiling/uploader/RecordingUploader.java

@@ -244,27 +244,23 @@ public final class RecordingUploader {
     // currently only gzip and off are supported
     // this needs to be updated once more compression types are added
     switch (type) {
+      case ON:
+      case MEDIUM:
+      default:
+        {
+          compression = (is, expectedSize) -> StreamUtils.gzipStream(is, expectedSize, consumer);
+          break;
+        }
       case LOW:
         {
           compression = (is, expectedSize) -> StreamUtils.lz4Stream(is, expectedSize, consumer);
           break;
         }
-      case ON:
-      case MEDIUM:
-        {
-          compression = (is, expectedSize) -> StreamUtils.gzipStream(is, expectedSize, consumer);
-          break;
-        }
       case OFF:
         {
           compression = (is, expectedSize) -> StreamUtils.readStream(is, expectedSize, consumer);
           break;
         }
-      default:
-        {
-          log.warn("Unrecognizable compression type: {}. Defaulting to 'on'.", type);
-          compression = (is, expectedSize) -> StreamUtils.gzipStream(is, expectedSize, consumer);
-        }
     }
     return compression;
   }

dd-java-agent/agent-profiling/profiling-uploader/src/test/java/com/datadog/profiling/uploader/CompressionTypeTest.java

@@ -9,10 +9,15 @@ import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.EnumSource;
 
 class CompressionTypeTest {
+
   @Test
-  void testDefault() {
-    assertEquals(CompressionType.UNKNOWN, CompressionType.of(""));
-    assertEquals(CompressionType.UNKNOWN, CompressionType.of(null));
+  void testEmpty() {
+    assertEquals(CompressionType.ON, CompressionType.of(""));
+  }
+
+  @Test
+  void testNull() {
+    assertEquals(CompressionType.ON, CompressionType.of(null));
   }
 
   @ParameterizedTest