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Make http pipelining support mandatory (elastic#30695)
This is related to elastic#29500 and elastic#28898. This commit removes the abilitiy to disable http pipelining. After this commit, any elasticsearch node will support pipelined requests from a client. Additionally, it extracts some of the http pipelining work to the server module. This extracted work is used to implement pipelining for the nio plugin.
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102 changes: 102 additions & 0 deletions
102
...sport-netty4/src/main/java/org/elasticsearch/http/netty4/Netty4HttpPipeliningHandler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| /* | ||
| * Licensed to Elasticsearch under one or more contributor | ||
| * license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright | ||
| * ownership. Elasticsearch 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. | ||
| */ | ||
|
|
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| package org.elasticsearch.http.netty4; | ||
|
|
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| import io.netty.channel.ChannelDuplexHandler; | ||
| import io.netty.channel.ChannelHandlerContext; | ||
| import io.netty.channel.ChannelPromise; | ||
| import io.netty.handler.codec.http.LastHttpContent; | ||
| import org.apache.logging.log4j.Logger; | ||
| import org.elasticsearch.common.collect.Tuple; | ||
| import org.elasticsearch.http.HttpPipelinedRequest; | ||
| import org.elasticsearch.http.HttpPipeliningAggregator; | ||
| import org.elasticsearch.transport.netty4.Netty4Utils; | ||
|
|
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| import java.nio.channels.ClosedChannelException; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
|
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| /** | ||
| * Implements HTTP pipelining ordering, ensuring that responses are completely served in the same order as their corresponding requests. | ||
| */ | ||
| public class Netty4HttpPipeliningHandler extends ChannelDuplexHandler { | ||
|
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| private final Logger logger; | ||
| private final HttpPipeliningAggregator<Netty4HttpResponse, ChannelPromise> aggregator; | ||
|
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| /** | ||
| * Construct a new pipelining handler; this handler should be used downstream of HTTP decoding/aggregation. | ||
| * | ||
| * @param logger for logging unexpected errors | ||
| * @param maxEventsHeld the maximum number of channel events that will be retained prior to aborting the channel connection; this is | ||
| * required as events cannot queue up indefinitely | ||
| */ | ||
| public Netty4HttpPipeliningHandler(Logger logger, final int maxEventsHeld) { | ||
| this.logger = logger; | ||
| this.aggregator = new HttpPipeliningAggregator<>(maxEventsHeld); | ||
| } | ||
|
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| @Override | ||
| public void channelRead(final ChannelHandlerContext ctx, final Object msg) { | ||
| if (msg instanceof LastHttpContent) { | ||
| HttpPipelinedRequest<LastHttpContent> pipelinedRequest = aggregator.read(((LastHttpContent) msg).retain()); | ||
| ctx.fireChannelRead(pipelinedRequest); | ||
| } else { | ||
| ctx.fireChannelRead(msg); | ||
| } | ||
| } | ||
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| @Override | ||
| public void write(final ChannelHandlerContext ctx, final Object msg, final ChannelPromise promise) { | ||
| assert msg instanceof Netty4HttpResponse : "Message must be type: " + Netty4HttpResponse.class; | ||
| Netty4HttpResponse response = (Netty4HttpResponse) msg; | ||
| boolean success = false; | ||
| try { | ||
| List<Tuple<Netty4HttpResponse, ChannelPromise>> readyResponses = aggregator.write(response, promise); | ||
| for (Tuple<Netty4HttpResponse, ChannelPromise> readyResponse : readyResponses) { | ||
| ctx.write(readyResponse.v1().getResponse(), readyResponse.v2()); | ||
| } | ||
| success = true; | ||
| } catch (IllegalStateException e) { | ||
| ctx.channel().close(); | ||
| } finally { | ||
| if (success == false) { | ||
| promise.setFailure(new ClosedChannelException()); | ||
| } | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void close(ChannelHandlerContext ctx, ChannelPromise promise) { | ||
| List<Tuple<Netty4HttpResponse, ChannelPromise>> inflightResponses = aggregator.removeAllInflightResponses(); | ||
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| if (inflightResponses.isEmpty() == false) { | ||
| ClosedChannelException closedChannelException = new ClosedChannelException(); | ||
| for (Tuple<Netty4HttpResponse, ChannelPromise> inflightResponse : inflightResponses) { | ||
| try { | ||
| inflightResponse.v2().setFailure(closedChannelException); | ||
| } catch (RuntimeException e) { | ||
| logger.error("unexpected error while releasing pipelined http responses", e); | ||
| } | ||
| } | ||
| } | ||
| ctx.close(promise); | ||
| } | ||
| } |
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37 changes: 37 additions & 0 deletions
37
modules/transport-netty4/src/main/java/org/elasticsearch/http/netty4/Netty4HttpResponse.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| /* | ||
| * Licensed to Elasticsearch under one or more contributor | ||
| * license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright | ||
| * ownership. Elasticsearch 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. | ||
| */ | ||
|
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| package org.elasticsearch.http.netty4; | ||
|
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| import io.netty.handler.codec.http.FullHttpResponse; | ||
| import org.elasticsearch.http.HttpPipelinedMessage; | ||
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| public class Netty4HttpResponse extends HttpPipelinedMessage { | ||
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| private final FullHttpResponse response; | ||
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| public Netty4HttpResponse(int sequence, FullHttpResponse response) { | ||
| super(sequence); | ||
| this.response = response; | ||
| } | ||
|
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| public FullHttpResponse getResponse() { | ||
| return response; | ||
| } | ||
| } |
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