Github user dongeforever commented on a diff in the pull request:
https://github.com/apache/incubator-rocketmq/pull/156#discussion_r139868962
--- Diff:
broker/src/main/java/org/apache/rocketmq/broker/ServerTracerTimeUtil.java ---
@@ -0,0 +1,108 @@
+/*
+ * 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.rocketmq.broker;
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import java.util.concurrent.TimeUnit;
+import org.apache.rocketmq.common.ClientTracerTimeUtil;
+import org.apache.rocketmq.common.TracerTime;
+
+public class ServerTracerTimeUtil {
+
+ public static Cache<String, TracerTime> tracerTimeCache =
CacheBuilder.newBuilder()
+ .maximumSize(10000)
+ .expireAfterWrite(15, TimeUnit.MINUTES)
+ .build();
+
+ public static boolean isEnableTracerTime() {
+ return ClientTracerTimeUtil.isEnableTracerTime();
+ }
+
+ public static void addMessageCreateTime(String messageTracerTimeId,
String messageCreateTime) {
+ if (messageCreateTime == null || messageCreateTime.length() < 1) {
+ return;
+ }
+
+ TracerTime tracerTime =
tracerTimeCache.getIfPresent(messageTracerTimeId);
+ if (tracerTime == null) {
+ tracerTime = new TracerTime();
--- End diff --
getIfPresent may have concurrent problem
Maybe getOrDefault is OK
---
