/
ReactorResourceFactory.java
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/
ReactorResourceFactory.java
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/*
* Copyright 2002-2018 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.
* 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.springframework.http.client.reactive;
import reactor.netty.http.HttpResources;
import reactor.netty.resources.ConnectionProvider;
import reactor.netty.resources.LoopResources;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Factory to manage Reactor Netty resources, i.e. {@link LoopResources} for
* event loop threads, and {@link ConnectionProvider} for the connection pool,
* within the lifecycle of a Spring {@code ApplicationContext}.
*
* <p>This factory implements {@link InitializingBean} and {@link DisposableBean}
* and is expected typically to be declared as a Spring-managed bean.
*
* @author Rossen Stoyanchev
* @since 5.1
*/
public class ReactorResourceFactory implements InitializingBean, DisposableBean {
private boolean globalResources = true;
@Nullable
private ConnectionProvider connectionProvider;
@Nullable
private LoopResources loopResources;
private String threadPrefix = "reactor-http";
/**
* Whether to expose and manage the global Reactor Netty resources from the
* {@link HttpResources} holder.
* <p>Default is "true" in which case this factory helps to configure and
* shut down the global Reactor Netty resources within the lifecycle of a
* Spring {@code ApplicationContext}.
* <p>If set to "false" then the factory creates and manages its own
* {@link LoopResources} and {@link ConnectionProvider}, independent of the
* global ones in the {@link HttpResources} holder.
* @param globalResources whether to expose and manage the global resources
*/
public void setGlobalResources(boolean globalResources) {
this.globalResources = globalResources;
}
/**
* Configure the {@link ConnectionProvider} to use.
* <p>By default, initialized with {@link ConnectionProvider#elastic(String)}.
* @param connectionProvider the connection provider to use
*/
public void setConnectionProvider(@Nullable ConnectionProvider connectionProvider) {
this.connectionProvider = connectionProvider;
}
/**
* Configure the {@link LoopResources} to use.
* <p>By default, initialized with {@link LoopResources#create(String)}.
* @param loopResources the loop resources to use
*/
public void setLoopResources(@Nullable LoopResources loopResources) {
this.loopResources = loopResources;
}
/**
* Configure the thread prefix to initialize {@link LoopResources} with. This
* is used only when a {@link LoopResources} instance isn't
* {@link #setLoopResources(LoopResources) provided}.
* <p>By default set to "reactor-http".
* @param threadPrefix the thread prefix to use
*/
public void setThreadPrefix(String threadPrefix) {
Assert.notNull(threadPrefix, "Thread prefix is required");
this.threadPrefix = threadPrefix;
}
/**
* Whether this factory exposes the global
* {@link reactor.netty.http.HttpResources HttpResources} holder.
*/
public boolean isGlobalResources() {
return this.globalResources;
}
/**
* Return the configured {@link ConnectionProvider}.
*/
@Nullable
public ConnectionProvider getConnectionProvider() {
return this.connectionProvider;
}
/**
* Return the configured {@link LoopResources}.
*/
@Nullable
public LoopResources getLoopResources() {
return this.loopResources;
}
/**
* Return the configured prefix for event loop threads.
*/
public String getThreadPrefix() {
return this.threadPrefix;
}
@Override
public void afterPropertiesSet() throws Exception {
if (this.loopResources == null) {
this.loopResources = LoopResources.create(this.threadPrefix);
}
if (this.connectionProvider == null) {
this.connectionProvider = ConnectionProvider.elastic("http");
}
if (this.globalResources) {
HttpResources.set(this.loopResources);
HttpResources.set(this.connectionProvider);
}
}
@Override
public void destroy() {
Assert.notNull(this.connectionProvider, "No ConnectionProvider");
this.connectionProvider.dispose();
Assert.notNull(this.loopResources, "No LoopResources");
this.loopResources.dispose();
}
}