/* * Copyright (c) [2016-2018] [University of Minnesota] * * 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.grouplens.samantha.modeler.solver; import org.grouplens.samantha.modeler.common.LearningData; import org.grouplens.samantha.modeler.common.LearningInstance; import org.grouplens.samantha.server.exception.BadRequestException; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectOutputStream; import java.util.List; public class CacheInstanceRunnable implements ObjectiveRunnable { final private static Logger logger = LoggerFactory.getLogger(CacheInstanceRunnable.class); private final String cachePath; private final LearningData data; private long cnt = 0; public CacheInstanceRunnable(String cachePath, LearningData data) { this.cachePath = cachePath; this.data = data; } @Override public void run() { try { ObjectOutputStream outputStream = new ObjectOutputStream(new FileOutputStream(cachePath)); List<LearningInstance> instances; while ((instances = data.getLearningInstance()).size() > 0) { for (LearningInstance ins : instances) { cnt++; outputStream.writeUnshared(ins); outputStream.reset(); if (cnt % 1000000 == 0) { logger.info("Cached {} instances.", cnt); } } } outputStream.flush(); outputStream.close(); } catch (IOException e) { logger.error(e.getMessage()); throw new BadRequestException(e); } } public double getObjVal() { return cnt; } }