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Pass Mono to Reactor Netty when feasible

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Closes gh-22800
This commit is contained in:
Rossen Stoyanchev
2019-04-16 16:54:33 -04:00
parent 15b2fb1210
commit 5b711a964b
5 changed files with 49 additions and 17 deletions
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21
spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpResponse.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2018 the original author or authors.
* Copyright 2002-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -25,8 +25,10 @@ import java.util.function.Function;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.core.publisher.MonoProcessor;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.core.io.buffer.DataBufferUtils;
import org.springframework.core.io.buffer.DefaultDataBufferFactory;
import org.springframework.http.HttpHeaders;
@@ -54,10 +56,17 @@ public class MockServerHttpResponse extends AbstractServerHttpResponse {
public MockServerHttpResponse() {
super(new DefaultDataBufferFactory());
this(new DefaultDataBufferFactory());
}
public MockServerHttpResponse(DataBufferFactory dataBufferFactory) {
super(dataBufferFactory);
this.writeHandler = body -> {
this.body = body.cache();
return this.body.then();
// Avoid .then() which causes data buffers to be released
MonoProcessor<Void> completion = MonoProcessor.create();
this.body = body.doOnComplete(completion::onComplete).doOnError(completion::onError).cache();
this.body.subscribe();
return completion;
};
}
@@ -125,8 +134,10 @@ public class MockServerHttpResponse extends AbstractServerHttpResponse {
* charset or "UTF-8" by default.
*/
public Mono<String> getBodyAsString() {
Charset charset = Optional.ofNullable(getHeaders().getContentType()).map(MimeType::getCharset)
.orElse(StandardCharsets.UTF_8);
return getBody()
.reduce(bufferFactory().allocateBuffer(), (previous, current) -> {
previous.write(current);
@@ -137,8 +148,10 @@ public class MockServerHttpResponse extends AbstractServerHttpResponse {
}
private static String bufferToString(DataBuffer buffer, Charset charset) {
Assert.notNull(charset, "'charset' must not be null");
byte[] bytes = new byte[buffer.readableByteCount()];
buffer.read(bytes);
DataBufferUtils.release(buffer);
return new String(bytes, charset);
}

14
spring-web/src/main/java/org/springframework/http/client/reactive/ReactorClientHttpRequest.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2018 the original author or authors.
* Copyright 2002-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -81,8 +81,16 @@ class ReactorClientHttpRequest extends AbstractClientHttpRequest implements Zero
@Override
public Mono<Void> writeWith(Publisher<? extends DataBuffer> body) {
return doCommit(() -> {
Flux<ByteBuf> byteBufFlux = Flux.from(body).map(NettyDataBufferFactory::toByteBuf);
return this.outbound.send(byteBufFlux).then();
// Send as Mono if possible as an optimization hint to Reactor Netty
if (body instanceof Mono) {
Mono<ByteBuf> byteBufMono = Mono.from(body).map(NettyDataBufferFactory::toByteBuf);
return this.outbound.send(byteBufMono).then();
}
else {
Flux<ByteBuf> byteBufFlux = Flux.from(body).map(NettyDataBufferFactory::toByteBuf);
return this.outbound.send(byteBufFlux).then();
}
});
}

15
spring-web/src/main/java/org/springframework/http/server/reactive/AbstractServerHttpResponse.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2002-2018 the original author or authors.
* Copyright 2002-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -29,6 +29,8 @@ import reactor.core.publisher.Mono;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.core.io.buffer.DataBufferUtils;
import org.springframework.core.io.buffer.PooledDataBuffer;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpLogging;
import org.springframework.http.HttpStatus;
@@ -173,9 +175,16 @@ public abstract class AbstractServerHttpResponse implements ServerHttpResponse {
}
@Override
@SuppressWarnings("unchecked")
public final Mono<Void> writeWith(Publisher<? extends DataBuffer> body) {
return new ChannelSendOperator<>(body,
writePublisher -> doCommit(() -> writeWithInternal(writePublisher)))
// Write as Mono if possible as an optimization hint to Reactor Netty
// ChannelSendOperator not necessary for Mono
if (body instanceof Mono) {
return ((Mono<? extends DataBuffer>) body).flatMap(buffer ->
doCommit(() -> writeWithInternal(Mono.just(buffer)))
.doOnDiscard(PooledDataBuffer.class, DataBufferUtils::release));
}
return new ChannelSendOperator<>(body, inner -> doCommit(() -> writeWithInternal(inner)))
.doOnError(t -> removeContentLength());
}

8
spring-web/src/test/java/org/springframework/http/codec/FormHttpMessageWriterTests.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2018 the original author or authors.
* Copyright 2002-2019 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -85,8 +85,7 @@ public class FormHttpMessageWriterTests extends AbstractLeakCheckingTestCase {
String expected = "name+1=value+1&name+2=value+2%2B1&name+2=value+2%2B2&name+3";
StepVerifier.create(response.getBody())
.consumeNextWith(stringConsumer(
expected))
.consumeNextWith(stringConsumer(expected))
.expectComplete()
.verify();
HttpHeaders headers = response.getHeaders();
@@ -96,8 +95,7 @@ public class FormHttpMessageWriterTests extends AbstractLeakCheckingTestCase {
private Consumer<DataBuffer> stringConsumer(String expected) {
return dataBuffer -> {
String value =
DataBufferTestUtils.dumpString(dataBuffer, StandardCharsets.UTF_8);
String value = DataBufferTestUtils.dumpString(dataBuffer, StandardCharsets.UTF_8);
DataBufferUtils.release(dataBuffer);
assertEquals(expected, value);
};

8
spring-web/src/test/java/org/springframework/mock/http/server/reactive/test/MockServerHttpResponse.java
View File

@@ -25,6 +25,7 @@ import java.util.function.Function;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import reactor.core.publisher.MonoProcessor;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferFactory;
@@ -61,8 +62,11 @@ public class MockServerHttpResponse extends AbstractServerHttpResponse {
public MockServerHttpResponse(DataBufferFactory dataBufferFactory) {
super(dataBufferFactory);
this.writeHandler = body -> {
this.body = body.cache();
return this.body.then();
// Avoid .then() which causes data buffers to be released
MonoProcessor<Void> completion = MonoProcessor.create();
this.body = body.doOnComplete(completion::onComplete).doOnError(completion::onError).cache();
this.body.subscribe();
return completion;
};
}