/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.shardingsphere.proxy.frontend.executor;

import lombok.Getter;
import org.apache.shardingsphere.infra.executor.kernel.thread.ExecutorServiceManager;

import java.util.concurrent.ExecutorService;

/**
 * User executor group.
 */
public final class UserExecutorGroup {
    
    private static final String NAME_FORMAT = "Command-%d";
    
    private static final UserExecutorGroup INSTANCE = new UserExecutorGroup();
    
    @Getter
    private final ExecutorService executorService;
    
    private UserExecutorGroup() {
        ExecutorServiceManager executorServiceManager = new ExecutorServiceManager(0, NAME_FORMAT);
        executorService = executorServiceManager.getExecutorService();
    }
    
    /**
     * Get instance of user executor group.
     *
     * @return user executor group
     */
    public static UserExecutorGroup getInstance() {
        return INSTANCE;
    }
}
