org.springframework.http.client.reactive.JettyResourceFactory Maven / Gradle / Ivy
/*
* 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
*
* 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 org.springframework.http.client.reactive;
import java.nio.ByteBuffer;
import java.util.concurrent.Executor;
import org.eclipse.jetty.io.ByteBufferPool;
import org.eclipse.jetty.io.MappedByteBufferPool;
import org.eclipse.jetty.util.ProcessorUtils;
import org.eclipse.jetty.util.component.LifeCycle;
import org.eclipse.jetty.util.thread.QueuedThreadPool;
import org.eclipse.jetty.util.thread.ScheduledExecutorScheduler;
import org.eclipse.jetty.util.thread.Scheduler;
import org.eclipse.jetty.util.thread.ThreadPool;
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 Jetty resources, i.e. {@link Executor}, {@link ByteBufferPool} and
* {@link Scheduler}, within the lifecycle of a Spring {@code ApplicationContext}.
*
* This factory implements {@link InitializingBean} and {@link DisposableBean}
* and is expected typically to be declared as a Spring-managed bean.
*
* @author Sebastien Deleuze
* @since 5.1
*/
public class JettyResourceFactory implements InitializingBean, DisposableBean {
@Nullable
private Executor executor;
@Nullable
private ByteBufferPool byteBufferPool;
@Nullable
private Scheduler scheduler;
private String threadPrefix = "jetty-http";
/**
* Configure the {@link Executor} to use.
*
By default, initialized with a {@link QueuedThreadPool}.
* @param executor the executor to use
*/
public void setExecutor(@Nullable Executor executor) {
this.executor = executor;
}
/**
* Configure the {@link ByteBufferPool} to use.
*
By default, initialized with a {@link MappedByteBufferPool}.
* @param byteBufferPool the {@link ByteBuffer} pool to use
*/
public void setByteBufferPool(@Nullable ByteBufferPool byteBufferPool) {
this.byteBufferPool = byteBufferPool;
}
/**
* Configure the {@link Scheduler} to use.
*
By default, initialized with a {@link ScheduledExecutorScheduler}.
* @param scheduler the {@link Scheduler} to use
*/
public void setScheduler(@Nullable Scheduler scheduler) {
this.scheduler = scheduler;
}
/**
* Configure the thread prefix to initialize {@link QueuedThreadPool} executor with. This
* is used only when a {@link Executor} instance isn't
* {@link #setExecutor(Executor) provided}.
*
By default set to "jetty-http".
* @param threadPrefix the thread prefix to use
*/
public void setThreadPrefix(String threadPrefix) {
Assert.notNull(threadPrefix, "Thread prefix is required");
this.threadPrefix = threadPrefix;
}
/**
* Return the configured {@link Executor}.
*/
@Nullable
public Executor getExecutor() {
return this.executor;
}
/**
* Return the configured {@link ByteBufferPool}.
*/
@Nullable
public ByteBufferPool getByteBufferPool() {
return this.byteBufferPool;
}
/**
* Return the configured {@link Scheduler}.
*/
@Nullable
public Scheduler getScheduler() {
return this.scheduler;
}
@Override
public void afterPropertiesSet() throws Exception {
String name = this.threadPrefix + "@" + Integer.toHexString(hashCode());
if (this.executor == null) {
QueuedThreadPool threadPool = new QueuedThreadPool();
threadPool.setName(name);
this.executor = threadPool;
}
if (this.byteBufferPool == null) {
this.byteBufferPool = new MappedByteBufferPool(2048,
this.executor instanceof ThreadPool.SizedThreadPool
? ((ThreadPool.SizedThreadPool) executor).getMaxThreads() / 2
: ProcessorUtils.availableProcessors() * 2);
}
if (this.scheduler == null) {
this.scheduler = new ScheduledExecutorScheduler(name + "-scheduler", false);
}
if (this.executor instanceof LifeCycle) {
((LifeCycle)this.executor).start();
}
this.scheduler.start();
}
@Override
public void destroy() throws Exception {
try {
if (this.executor instanceof LifeCycle) {
((LifeCycle)this.executor).stop();
}
}
catch (Throwable ex) {
// ignore
}
try {
if (this.scheduler != null) {
this.scheduler.stop();
}
}
catch (Throwable ex) {
// ignore
}
}
}