Add common prefix to loader thread names

All threads created by ExoPlayer should now have the prefix "ExoPlayer:".

PiperOrigin-RevId: 356518037

library/common/src/main/java/com/google/android/exoplayer2/util/Util.java

@@ -538,7 +538,7 @@ public final class Util {
    * @param threadName The name of the thread.
    * @return The executor.
    */
-  public static ExecutorService newSingleThreadExecutor(final String threadName) {
+  public static ExecutorService newSingleThreadExecutor(String threadName) {
     return Executors.newSingleThreadExecutor(runnable -> new Thread(runnable, threadName));
   }
 

library/core/src/main/java/com/google/android/exoplayer2/source/ProgressiveMediaPeriod.java

@@ -187,7 +187,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
     this.allocator = allocator;
     this.customCacheKey = customCacheKey;
     this.continueLoadingCheckIntervalBytes = continueLoadingCheckIntervalBytes;
-    loader = new Loader("Loader:ProgressiveMediaPeriod");
+    loader = new Loader("ProgressiveMediaPeriod");
     this.progressiveMediaExtractor = new BundledExtractorsAdapter(extractorsFactory);
     loadCondition = new ConditionVariable();
     maybeFinishPrepareRunnable = this::maybeFinishPrepare;

library/core/src/main/java/com/google/android/exoplayer2/source/SingleSampleMediaPeriod.java

@@ -88,7 +88,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
     this.treatLoadErrorsAsEndOfStream = treatLoadErrorsAsEndOfStream;
     tracks = new TrackGroupArray(new TrackGroup(format));
     sampleStreams = new ArrayList<>();
-    loader = new Loader("Loader:SingleSampleMediaPeriod");
+    loader = new Loader("SingleSampleMediaPeriod");
   }
 
   public void release() {

library/core/src/main/java/com/google/android/exoplayer2/source/chunk/ChunkSampleStream.java

@@ -133,7 +133,7 @@ public class ChunkSampleStream<T extends ChunkSource> implements SampleStream, S
     this.callback = callback;
     this.mediaSourceEventDispatcher = mediaSourceEventDispatcher;
     this.loadErrorHandlingPolicy = loadErrorHandlingPolicy;
-    loader = new Loader("Loader:ChunkSampleStream");
+    loader = new Loader("ChunkSampleStream");
     nextChunkHolder = new ChunkHolder();
     mediaChunks = new ArrayList<>();
     readOnlyMediaChunks = Collections.unmodifiableList(mediaChunks);

library/core/src/main/java/com/google/android/exoplayer2/upstream/Loader.java

@@ -152,6 +152,8 @@ public final class Loader implements LoaderErrorThrower {
 
   }
 
+  private static final String THREAD_NAME_PREFIX = "ExoPlayer:Loader:";
+
   /** Types of action that can be taken in response to a load error. */
   @Documented
   @Retention(RetentionPolicy.SOURCE)
@@ -210,10 +212,12 @@ public final class Loader implements LoaderErrorThrower {
   @Nullable private IOException fatalError;
 
   /**
-   * @param threadName A name for the loader's thread.
+   * @param threadNameSuffix A name suffix for the loader's thread. This should be the name of the
+   *     component using the loader.
    */
-  public Loader(String threadName) {
-    this.downloadExecutorService = Util.newSingleThreadExecutor(threadName);
+  public Loader(String threadNameSuffix) {
+    this.downloadExecutorService =
+        Util.newSingleThreadExecutor(THREAD_NAME_PREFIX + threadNameSuffix);
   }
 
   /**

library/core/src/test/java/com/google/android/exoplayer2/ExoPlayerTest.java

@@ -7392,7 +7392,7 @@ public final class ExoPlayerTest {
                 drmSessionManager,
                 drmEventDispatcher,
                 /* deferOnPrepared= */ false) {
-              private Loader loader = new Loader("oomLoader");
+              private final Loader loader = new Loader("ExoPlayerTest");
 
               @Override
               public boolean continueLoading(long positionUs) {

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java

@@ -562,7 +562,7 @@ public final class DashMediaSource extends BaseMediaSource {
       processManifest(false);
     } else {
       dataSource = manifestDataSourceFactory.createDataSource();
-      loader = new Loader("Loader:DashMediaSource");
+      loader = new Loader("DashMediaSource");
       handler = Util.createHandlerForCurrentLooper();
       startLoadingManifest();
     }

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/SsMediaSource.java

@@ -451,7 +451,7 @@ public final class SsMediaSource extends BaseMediaSource
       processManifest();
     } else {
       manifestDataSource = manifestDataSourceFactory.createDataSource();
-      manifestLoader = new Loader("Loader:Manifest");
+      manifestLoader = new Loader("SsMediaSource");
       manifestLoaderErrorThrower = manifestLoader;
       manifestRefreshHandler = Util.createHandlerForCurrentLooper();
       startLoadingManifest();