Introduce ReplicationTaskId as thread-local

Allow other plugins and classes to access the current replication task
id through a thread-local.

Change-Id: Iacacda973fb5635877b4c68d468542dc69627181

src/main/java/com/googlesource/gerrit/plugins/replication/pull/FetchOne.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/FetchOne.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/FetchOne.java
index 7f69304..af944dc 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/FetchOne.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/FetchOne.java
@@ -15,6 +15,7 @@
 package com.googlesource.gerrit.plugins.replication.pull;
 
 import static com.googlesource.gerrit.plugins.replication.pull.PullReplicationLogger.repLog;
+import static com.googlesource.gerrit.plugins.replication.pull.ReplicationTaskId.withTaskId;
 import static java.util.concurrent.TimeUnit.NANOSECONDS;
 
 import com.google.common.annotations.VisibleForTesting;
@@ -380,7 +381,7 @@
         long startedAt = context.getStartTime();
         long delay = NANOSECONDS.toMillis(startedAt - createdAt);
         git = gitManager.openRepository(projectName);
-        List<FetchRefSpec> fetchRefSpecs = runImpl();
+        List<FetchRefSpec> fetchRefSpecs = withTaskId(taskIdHex, this::runImpl);
 
         if (fetchRefSpecs.isEmpty()) {
           repLog.info(
@@ -580,18 +581,22 @@
    * @return The list of refSpecs to fetch
    */
   public List<FetchRefSpec> getFetchRefSpecs(boolean lock) throws IOException {
-    List<FetchRefSpec> configRefSpecs =
-        config.getFetchRefSpecs().stream().map(FetchRefSpec::fromRefSpec).toList();
+    return withTaskId(
+        taskIdHex,
+        () -> {
+          List<FetchRefSpec> configRefSpecs =
+              config.getFetchRefSpecs().stream().map(FetchRefSpec::fromRefSpec).toList();
 
-    if (delta.isEmpty() && replicationFetchFilter().isEmpty()) {
-      return configRefSpecs;
-    }
+          if (delta.isEmpty() && replicationFetchFilter().isEmpty()) {
+            return configRefSpecs;
+          }
 
-    return runRefsFilter(computeDeltaIfNeeded(), lock).stream()
-        .map(ref -> refToFetchRefSpec(ref, configRefSpecs))
-        .filter(Optional::isPresent)
-        .map(Optional::get)
-        .collect(Collectors.toList());
+          return runRefsFilter(computeDeltaIfNeeded(), lock).stream()
+              .map(ref -> refToFetchRefSpec(ref, configRefSpecs))
+              .filter(Optional::isPresent)
+              .map(Optional::get)
+              .collect(Collectors.toList());
+        });
   }
 
   public void unlockRefSpecs(Map<String, AutoCloseable> locks) {

src/main/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationTaskId.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationTaskId.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationTaskId.java
new file mode 100644
index 0000000..40b3ec0
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ReplicationTaskId.java
@@ -0,0 +1,46 @@
+// Copyright (C) 2026 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.googlesource.gerrit.plugins.replication.pull;
+
+import com.google.gerrit.common.Nullable;
+import java.io.IOException;
+
+public class ReplicationTaskId {
+  private static final ThreadLocal<String> currentTaskId = new ThreadLocal<>();
+
+  @FunctionalInterface
+  public interface ReplicationBody<T> {
+    T apply() throws IOException;
+  }
+
+  static <T> T withTaskId(String taskId, ReplicationBody<T> body) throws IOException {
+    String oldTaskId = currentTaskId.get();
+    currentTaskId.set(taskId);
+    try {
+      return body.apply();
+    } finally {
+      if (oldTaskId == null) {
+        currentTaskId.remove();
+      } else {
+        currentTaskId.set(oldTaskId);
+      }
+    }
+  }
+
+  @Nullable
+  public static String get() {
+    return currentTaskId.get();
+  }
+}