org.ng200.openolympus.services.TaskContainerCache.java Source code

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Here is the source code for org.ng200.openolympus.services.TaskContainerCache.java

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/**
 * The MIT License
 * Copyright (c) 2014-2015 Nick Guletskii
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.ng200.openolympus.services;

import java.nio.file.FileSystems;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import org.ng200.openolympus.SharedTemporaryStorageFactory;
import org.ng200.openolympus.model.Task;
import org.ng200.openolympus.tasks.TaskContainer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class TaskContainerCache {
    private final ConcurrentMap<Task, TaskContainer> taskContainers;
    private final StorageService storageService;
    private SharedTemporaryStorageFactory sharedTemporaryStorageFactory = null;

    @Autowired
    private SolutionService solutionService;

    private final ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();

    @Autowired
    public TaskContainerCache(final StorageService storageService) {
        this.taskContainers = new ConcurrentHashMap<>();
        this.storageService = storageService;
        this.executorService.scheduleAtFixedRate(() -> {
            this.taskContainers.forEach((id, taskContainer) -> taskContainer.collectGarbage(this.solutionService));
        }, 10, 10, TimeUnit.SECONDS);
    }

    public TaskContainer getTaskContainerForTask(final Task task) {
        if (this.sharedTemporaryStorageFactory == null) {
            this.sharedTemporaryStorageFactory = new SharedTemporaryStorageFactory(
                    FileSystems.getDefault().getPath(this.storageService.getStoragePath()));
        }
        return this.taskContainers.computeIfAbsent(task, (key) -> {
            try {
                return new TaskContainer(this.storageService.getTaskJudgeFile(task),
                        this.sharedTemporaryStorageFactory, this.executorService);
            } catch (final Exception e) {
                throw new RuntimeException("Couldn't load task container", e);
            }
        });
    }

    public void clear() {
        taskContainers.clear();
    }
}