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https://issues.apache.org/jira/browse/JAMES-2295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16539604#comment-16539604
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ASF GitHub Bot commented on JAMES-2295:
---------------------------------------
Github user chibenwa commented on a diff in the pull request:
https://github.com/apache/james-project/pull/127#discussion_r201572722
--- Diff:
server/queue/queue-api/src/main/java/org/apache/james/queue/api/EmptyConsumerOptions.java
---
@@ -0,0 +1,39 @@
+/****************************************************************
+ * 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 *
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+ * KIND, either express or implied. See the License for the *
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+ * under the License. *
+ ****************************************************************/
+
+package org.apache.james.queue.api;
+
+/**
+ * The stub implementation for {@code ConsumerOptions}. Simply returns
given argument.
+ */
+final class EmptyConsumerOptions implements MailQueue.ConsumerOptions {
--- End diff --
Can't this be implemented as a lambda in the ConsumerOptions class directly?
> JMS mailqueue deadlock when a single thread issue several consume
> -----------------------------------------------------------------
>
> Key: JAMES-2295
> URL: https://issues.apache.org/jira/browse/JAMES-2295
> Project: James Server
> Issue Type: Bug
> Components: Queue
> Affects Versions: 3.0.0, master, 3.0.1
> Reporter: Tellier Benoit
> Priority: Major
> Labels: bug
>
> This will lead to a dead lock:
> {code:java}
> MailQueue.MailQueueItem mailQueueItem1 = getMailQueue().deQueue();
> MailQueue.MailQueueItem mailQueueItem2 = getMailQueue().deQueue();
> mailQueueItem1.done(true);
> mailQueueItem2.done(true);
> {code}
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