[ZOOKEEPER-3582] refactor the async api call to lambda style

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.7.0
• Component/s: server
• Labels: pull-request-available
• Assignee: Unassigned
• Reporter: Ling Mao
• Created: 15/Oct/19 05:51
• Updated: 28/Mar/21 08:54
• Resolved: 28/Dec/19 15:19

Description

For example:

if (recursive) {
    ZKUtil.visitSubTreeDFS(zk, path, watch, new StringCallback() {
        @Override
        public void processResult(int rc, String path, Object ctx, String name) {
            out.println(path);
        }
    });
}

refactor to 

ZKUtil.visitSubTreeDFS(zk, path, watch, (rc, path1, ctx, name) -> out.println(path1));

Issue Links

• links to: GitHub Pull Request #1142