io.micronaut.scheduling.executor.ExecutorFactory Maven / Gradle / Ivy
/*
* Copyright 2017-2019 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
*
* 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 io.micronaut.scheduling.executor;
import io.micronaut.context.annotation.Bean;
import io.micronaut.context.annotation.EachBean;
import io.micronaut.context.annotation.Factory;
import io.micronaut.core.reflect.InstantiationUtils;
import java.util.concurrent.*;
/**
* Constructs {@link ExecutorService} instances based on {@link UserExecutorConfiguration} instances.
*
* @author Graeme Rocher
* @since 1.0
*/
@Factory
public class ExecutorFactory {
private final ThreadFactory threadFactory;
/**
*
* @param threadFactory The factory to create new threads
*/
public ExecutorFactory(ThreadFactory threadFactory) {
this.threadFactory = threadFactory;
}
/**
* Create the ExecutorService with the given configuration.
*
* @param executorConfiguration The configuration to create a thread pool that creates new threads as needed
* @return A thread pool that creates new threads as needed
*/
@EachBean(ExecutorConfiguration.class)
@Bean(preDestroy = "shutdown")
public ExecutorService executorService(ExecutorConfiguration executorConfiguration) {
ExecutorType executorType = executorConfiguration.getType();
switch (executorType) {
case FIXED:
return executorConfiguration
.getThreadFactoryClass()
.flatMap(InstantiationUtils::tryInstantiate)
.map(factory -> Executors.newFixedThreadPool(executorConfiguration.getNumberOfThreads(), factory))
.orElse(Executors.newFixedThreadPool(executorConfiguration.getNumberOfThreads(), threadFactory));
case CACHED:
return executorConfiguration
.getThreadFactoryClass()
.flatMap(InstantiationUtils::tryInstantiate)
.map(Executors::newCachedThreadPool)
.orElse(Executors.newCachedThreadPool(threadFactory));
case SCHEDULED:
return executorConfiguration
.getThreadFactoryClass()
.flatMap(InstantiationUtils::tryInstantiate)
.map(factory -> Executors.newScheduledThreadPool(executorConfiguration.getCorePoolSize(), factory))
.orElse(Executors.newScheduledThreadPool(executorConfiguration.getCorePoolSize(), threadFactory));
case WORK_STEALING:
return Executors.newWorkStealingPool(executorConfiguration.getParallelism());
default:
throw new IllegalStateException("Could not create Executor service for enum value: " + executorType);
}
}
}