[jira] [Created] (ROCKETMQ-215) Use java 7 syntax to refator code base

[Jaskey Lam (JIRA)]

Jaskey Lam created ROCKETMQ-215:
-----------------------------------

             Summary: 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-client, rocketmq-commons, 
rocketmq-namesrv, rocketmq-remoting, rocketmq-store, rocketmq-tools
            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 require jdk which is greater or higher than java7, this can be 
improved.






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