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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2014, Red Hat Middleware LLC, and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.arquillian.spacelift.execution.impl;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;

import org.arquillian.spacelift.execution.Execution;
import org.arquillian.spacelift.execution.ExecutionService;
import org.arquillian.spacelift.execution.TimeoutExecutionException;

/**
 * Default execution service implementation. It uses cached threaded pool to execute or schedule callables to be run.
 *
 * @author Karel Piwko
 *
 */
public class ExecutionServiceImpl implements ExecutionService {

    private final ExecutorService service;
    private final ScheduledExecutorService scheduledService;

    public ExecutionServiceImpl() {
        final ThreadFactory threadFactory = new SpaceliftThreadFactory();
        this.service = Executors.newCachedThreadPool(threadFactory);
        this.scheduledService = Executors.newScheduledThreadPool(1, threadFactory);
    }

    @Override
    public  Execution execute(Callable task) throws org.arquillian.spacelift.execution.ExecutionException {
        Future future = service.submit(task);
        return new FutureBasedExecution(this, task, future);
    }

    @Override
    public  Execution schedule(Callable task, long delay, TimeUnit unit) throws TimeoutExecutionException,
        org.arquillian.spacelift.execution.ExecutionException {

        ScheduledFuture future = scheduledService.schedule(task, delay, unit);
        return new FutureBasedExecution(this, task, future);
    }

}