com.addthis.codec.utils.ScheduledExecutorServiceBuilder Maven / Gradle / Ivy

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/*
 * 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 com.addthis.codec.utils;

import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;

import com.google.common.annotations.Beta;
import com.google.common.util.concurrent.MoreExecutors;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;

@Beta
@JsonDeserialize(builder = ScheduledExecutorServiceBuilder.class)
public class ScheduledExecutorServiceBuilder {

    private final ThreadFactory threadFactory;
    private final int coreThreads;
    private final boolean shutdownHook;

    @JsonCreator
    public ScheduledExecutorServiceBuilder(@JsonProperty("thread-factory") ThreadFactory threadFactory,
                                           @JsonProperty("core-threads") int coreThreads,
                                           @JsonProperty("shutdown-hook") boolean shutdownHook) {
        this.threadFactory = threadFactory;
        this.coreThreads = coreThreads;
        this.shutdownHook = shutdownHook;
    }

    public ScheduledExecutorService build() {
        ScheduledThreadPoolExecutor service = new ScheduledThreadPoolExecutor(coreThreads, threadFactory);
        if (shutdownHook) {
            return MoreExecutors.getExitingScheduledExecutorService(service);
        } else {
            return service;
        }
    }
}