Github user revans2 commented on a diff in the pull request:
https://github.com/apache/storm/pull/2502#discussion_r167325584
--- Diff:
storm-client/src/jvm/org/apache/storm/daemon/worker/WorkerTransfer.java ---
@@ -0,0 +1,137 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 org.apache.storm.daemon.worker;
+
+import org.apache.storm.Config;
+import org.apache.storm.messaging.TaskMessage;
+import org.apache.storm.policy.IWaitStrategy;
+import org.apache.storm.serialization.ITupleSerializer;
+import org.apache.storm.tuple.AddressedTuple;
+import org.apache.storm.utils.JCQueue;
+import org.apache.storm.utils.ObjectReader;
+import org.apache.storm.utils.TransferDrainer;
+import org.apache.storm.utils.Utils;
+import org.apache.storm.utils.Utils.SmartThread;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Map;
+import java.util.Queue;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+
+// Transfers messages destined to other workers
+class WorkerTransfer implements JCQueue.Consumer {
+ static final Logger LOG =
LoggerFactory.getLogger(WorkerTransfer.class);
+
+ private final TransferDrainer drainer;
+ private WorkerState workerState;
+ private IWaitStrategy backPressureWaitStrategy;
+
+ JCQueue transferQueue; // [remoteTaskId] -> JCQueue. Some entries
maybe null (if no emits to those tasksIds from this worker)
--- End diff --
nit why does this need to be package private? Can we lock it down more?
---
