WorkQueue: Improve task thread names

The RunnableScheduledFuture task inside a Task has a few layers that
don't help provide a meaningful thread name whereas the Task itself
often has a toString() that does, so use the Task itself.

Here's an example for a SendEmail thread. It's a similar result for
Index-Interactive and other threads.

Before (line breaks added by me):
  SendEmail-1[
    java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@57310449[
      Not completed,
      task = java.util.concurrent.Executors$RunnableAdapter@3a7a2870[
        Wrapped task = com.google.gerrit.server.logging.LoggingContextAwareRunnable@9252ca5
      ]
    ]
  ]

After:
  SendEmail-1[send-email comments]

Change-Id: Iea78b6412b2259a968eed0a16744638f87796d91
Release-Notes: Improved WorkQueue task thread names
(cherry picked from commit d4c1e0a6ed7eb2b8fffa078a7ccec0c0edb0e668)

1 files changed, 1 insertions, 1 deletions

diff --git a/java/com/google/gerrit/server/git/WorkQueue.java b/java/com/google/gerrit/server/git/WorkQueue.java
index 86d6c7c7d2..ce2d5b654c 100644
--- a/java/com/google/gerrit/server/git/WorkQueue.java
+++ b/java/com/google/gerrit/server/git/WorkQueue.java
@@ -695,7 +695,7 @@ public class WorkQueue {
         try {
           executor.onStart(this);
           runningState.set(State.RUNNING);
-          Thread.currentThread().setName(oldThreadName + "[" + task.toString() + "]");
+          Thread.currentThread().setName(oldThreadName + "[" + this + "]");
           task.run();
         } finally {
           Thread.currentThread().setName(oldThreadName);