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Core components supporting the Micronaut Framework
/*
* Copyright 2017-2022 original authors
*
* Licensed 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 io.micronaut.http.client.netty;
import io.micronaut.core.propagation.PropagatedContext;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
/**
* An extension of Netty {@link SimpleChannelInboundHandler} that instruments the channel read handler
* by using collection of available io.micronaut.scheduling.instrument.InvocationInstrumenterFactory (such as
* {@link io.micronaut.http.context.ServerRequestContext#with(io.micronaut.http.HttpRequest, java.util.concurrent.Callable)}) if present during
* the constructor call of the http client.
* Thanks to that the {@link io.micronaut.http.context.ServerRequestContext#currentRequest()} returns parent request.
*
* @param the type of the inbound message
*/
abstract class SimpleChannelInboundHandlerInstrumented extends SimpleChannelInboundHandler {
private final PropagatedContext propagatedContext = PropagatedContext.getOrEmpty();
SimpleChannelInboundHandlerInstrumented() {
}
SimpleChannelInboundHandlerInstrumented(boolean autoRelease) {
super(autoRelease);
}
protected abstract void channelReadInstrumented(ChannelHandlerContext ctx, I msg) throws Exception;
@Override
protected final void channelRead0(ChannelHandlerContext ctx, I msg) throws Exception {
try (PropagatedContext.Scope ignore = propagatedContext.propagate()) {
channelReadInstrumented(ctx, msg);
}
}
}