org.apache.hudi.org.apache.hbase.thirdparty.io.netty.handler.codec.http2.Http2EmptyDataFrameConnectionDecoder Maven / Gradle / Ivy
/*
* Copyright 2019 The Netty Project
*
* The Netty Project 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:
*
* https://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.hbase.thirdparty.io.netty.handler.codec.http2;
import org.apache.hbase.thirdparty.io.netty.util.internal.ObjectUtil;
/**
* Enforce a limit on the maximum number of consecutive empty DATA frames (without end_of_stream flag) that are allowed
* before the connection will be closed.
*/
final class Http2EmptyDataFrameConnectionDecoder extends DecoratingHttp2ConnectionDecoder {
private final int maxConsecutiveEmptyFrames;
Http2EmptyDataFrameConnectionDecoder(Http2ConnectionDecoder delegate, int maxConsecutiveEmptyFrames) {
super(delegate);
this.maxConsecutiveEmptyFrames = ObjectUtil.checkPositive(
maxConsecutiveEmptyFrames, "maxConsecutiveEmptyFrames");
}
@Override
public void frameListener(Http2FrameListener listener) {
if (listener != null) {
super.frameListener(new Http2EmptyDataFrameListener(listener, maxConsecutiveEmptyFrames));
} else {
super.frameListener(null);
}
}
@Override
public Http2FrameListener frameListener() {
Http2FrameListener frameListener = frameListener0();
// Unwrap the original Http2FrameListener as we add this decoder under the hood.
if (frameListener instanceof Http2EmptyDataFrameListener) {
return ((Http2EmptyDataFrameListener) frameListener).listener;
}
return frameListener;
}
// Package-private for testing
Http2FrameListener frameListener0() {
return super.frameListener();
}
}