eolivelli commented on a change in pull request #819: ZOOKEEPER-3272: Clean up
netty4 code per Norman Maurer's review comments
URL: https://github.com/apache/zookeeper/pull/819#discussion_r256607222
##########
File path:
zookeeper-server/src/main/java/org/apache/zookeeper/server/NettyServerCnxnFactory.java
##########
@@ -192,14 +192,16 @@ public void channelRead(ChannelHandlerContext ctx,
Object msg) throws Exception
}
}
- @Override
- public void write(ChannelHandlerContext ctx, Object msg,
ChannelPromise promise) throws Exception {
+ // Use a single listener instance to reduce GC
+ private final GenericFutureListener<Future<Void>>
onWriteCompletedListener = (f) -> {
if (LOG.isTraceEnabled()) {
- promise.addListener((future) -> {
- LOG.trace("write {}",
- future.isSuccess() ? "complete" : "failed");
- });
+ LOG.trace("write {}", f.isSuccess() ? "complete" : "failed");
}
+ };
+
+ @Override
+ public void write(ChannelHandlerContext ctx, Object msg,
ChannelPromise promise) throws Exception {
+ promise.addListener(onWriteCompletedListener);
Review comment:
What about this:
```
if (LOG.isTraceEnabled()) {
promise.addListener(onWriteCompletedListener);
}
```
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