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https://issues.apache.org/jira/browse/ROCKETMQ-215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16040751#comment-16040751
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ASF GitHub Bot commented on ROCKETMQ-215:
-----------------------------------------
Github user lindzh commented on a diff in the pull request:
https://github.com/apache/incubator-rocketmq/pull/117#discussion_r120603647
--- Diff:
logappender/src/main/java/org/apache/rocketmq/logappender/common/ProducerInstance.java
---
@@ -39,7 +39,7 @@
public static final String DEFAULT_GROUP = "rocketmq_appender";
- private static ConcurrentHashMap<String, MQProducer> producerMap = new
ConcurrentHashMap<String, MQProducer>();
--- End diff --
There is log4j2 implementation in logappender.Since log4j2 not supported
jdk 1.6,logappender do not need to be compatible.
> Use java 7 syntax to refator code base
> --------------------------------------
>
> Key: ROCKETMQ-215
> URL: https://issues.apache.org/jira/browse/ROCKETMQ-215
> Project: Apache RocketMQ
> Issue Type: Improvement
> Components: rocketmq-broker, rocketmq-namesrv, rocketmq-store
> Reporter: Jaskey Lam
> Assignee: yukon
> Priority: Minor
>
> code base may have some code like
> {code}
> private ConcurrentMap<String/* topic@group */, ConcurrentMap<Integer,
> Long>> offsetTable =
> new ConcurrentHashMap<String, ConcurrentMap<Integer, Long>>(512);
> {code}
> Atucally, with java7, it can be simplied to
> {code}
> private ConcurrentMap<String/* topic@group */, ConcurrentMap<Integer,
> Long>> offsetTable =
> new ConcurrentHashMap<>(512);
> {code}
> Which is cleaner.
> Since rocketmq broker require jdk which is greater or higher than java7, this
> can be improved.
> But rocketmq client should still remains compatible with jdk 1.6
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