Github user ejwhite922 commented on a diff in the pull request:
https://github.com/apache/incubator-rya/pull/272#discussion_r170073123
--- Diff:
extras/rya.streams/query-manager/src/main/java/org/apache/rya/streams/querymanager/kafka/KafkaQueryChangeLogSource.java
---
@@ -0,0 +1,219 @@
+/**
+ * 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.rya.streams.querymanager.kafka;
+
+import static java.util.Objects.requireNonNull;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map.Entry;
+import java.util.Properties;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.locks.ReentrantLock;
+import java.util.stream.Collectors;
+
+import org.apache.kafka.clients.CommonClientConfigs;
+import org.apache.kafka.clients.consumer.ConsumerConfig;
+import org.apache.kafka.clients.consumer.KafkaConsumer;
+import org.apache.kafka.common.serialization.StringDeserializer;
+import org.apache.rya.streams.kafka.KafkaTopics;
+import org.apache.rya.streams.kafka.queries.KafkaQueryChangeLog;
+import org.apache.rya.streams.kafka.queries.KafkaQueryChangeLogFactory;
+import org.apache.rya.streams.querymanager.QueryChangeLogSource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.collect.Sets;
+import com.google.common.util.concurrent.AbstractScheduledService;
+
+import edu.umd.cs.findbugs.annotations.DefaultAnnotation;
+import edu.umd.cs.findbugs.annotations.NonNull;
+
+/**
+ * Represents a Kafka Server that manages {@link KafkaQueryChangeLog}s.
+ * <p/>
+ * Thread safe.
--- End diff --
net.jcip.annotations.ThreadSafe
Looks like Rya is using this one:
```
<dependency>
<groupId>com.github.stephenc.jcip</groupId>
<artifactId>jcip-annotations</artifactId>
<version>1.0-1</version>
</dependency>
```
---
