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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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
*
* http://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.dubbo.rpc.protocol.tri.transport;
import io.netty.handler.codec.http2.Http2StreamChannel;
import org.apache.dubbo.common.logger.ErrorTypeAwareLogger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.rpc.HeaderFilter;
import org.apache.dubbo.rpc.PathResolver;
import org.apache.dubbo.rpc.TriRpcStatus;
import org.apache.dubbo.rpc.executor.ExecutorSupport;
import org.apache.dubbo.rpc.model.FrameworkModel;
import org.apache.dubbo.rpc.protocol.tri.compressor.DeCompressor;
import org.apache.dubbo.rpc.protocol.tri.stream.TripleServerStream;
import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.http2.Http2DataFrame;
import io.netty.handler.codec.http2.Http2HeadersFrame;
import io.netty.handler.codec.http2.Http2ResetFrame;
import io.netty.util.ReferenceCountUtil;
import io.netty.util.ReferenceCounted;
import java.util.List;
import java.util.concurrent.Executor;
import static org.apache.dubbo.common.constants.LoggerCodeConstants.PROTOCOL_FAILED_RESPONSE;
public class TripleHttp2FrameServerHandler extends ChannelDuplexHandler {
private static final ErrorTypeAwareLogger LOGGER = LoggerFactory.getErrorTypeAwareLogger(
TripleHttp2FrameServerHandler.class);
private final PathResolver pathResolver;
private final ExecutorSupport executorSupport;
private final String acceptEncoding;
private final TripleServerStream tripleServerStream;
public TripleHttp2FrameServerHandler(
FrameworkModel frameworkModel,
ExecutorSupport executorSupport,
List filters,
Http2StreamChannel channel,
TripleWriteQueue writeQueue) {
this.executorSupport = executorSupport;
this.acceptEncoding = String.join(",",
frameworkModel.getExtensionLoader(DeCompressor.class).getSupportedExtensions());
this.pathResolver = frameworkModel.getExtensionLoader(PathResolver.class)
.getDefaultExtension();
// The executor will be assigned in onHeadersRead method
tripleServerStream = new TripleServerStream(channel, frameworkModel, null, pathResolver, acceptEncoding, filters, writeQueue);
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
if (msg instanceof Http2HeadersFrame) {
onHeadersRead(ctx, (Http2HeadersFrame) msg);
} else if (msg instanceof Http2DataFrame) {
onDataRead(ctx, (Http2DataFrame) msg);
} else if (msg instanceof ReferenceCounted) {
// ignored
ReferenceCountUtil.release(msg);
}
}
@Override
public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
if (evt instanceof Http2ResetFrame) {
onResetRead(ctx, (Http2ResetFrame) evt);
} else {
super.userEventTriggered(ctx, evt);
}
}
public void onResetRead(ChannelHandlerContext ctx, Http2ResetFrame frame) {
LOGGER.warn(PROTOCOL_FAILED_RESPONSE, "", "", "Triple Server received remote reset errorCode=" + frame.errorCode());
if (tripleServerStream != null) {
tripleServerStream.transportObserver.cancelByRemote(frame.errorCode());
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
if (LOGGER.isWarnEnabled()) {
LOGGER.warn(PROTOCOL_FAILED_RESPONSE, "", "", "Exception in processing triple message", cause);
}
TriRpcStatus status = TriRpcStatus.getStatus(cause,
"Provider's error:\n" + cause.getMessage());
tripleServerStream.cancelByLocal(status);
}
public void onDataRead(ChannelHandlerContext ctx, Http2DataFrame msg) throws Exception {
tripleServerStream.transportObserver.onData(msg.content(), msg.isEndStream());
}
public void onHeadersRead(ChannelHandlerContext ctx, Http2HeadersFrame msg) throws Exception {
Executor executor = executorSupport.getExecutor(msg.headers());
tripleServerStream.setExecutor(executor);
tripleServerStream.transportObserver.onHeader(msg.headers(), msg.isEndStream());
}
}