be.roots.taconic.pricingguide.respository.ModelRepositoryImpl.java Source code

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Here is the source code for be.roots.taconic.pricingguide.respository.ModelRepositoryImpl.java

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package be.roots.taconic.pricingguide.respository;

/**
 *  This file is part of the Taconic Pricing Guide generator.  This code will
 *  generate a full featured PDF Pricing Guide by using using iText
 *  (http://www.itextpdf.com) based on JSON files.
 *
 *  Copyright (C) 2015  Roots nv
 *  Authors: Koen Dehaen (koen.dehaen@roots.be)
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  For more information, please contact Roots nv at this address: support@roots.be
 *
 */

import be.roots.taconic.pricingguide.domain.Model;
import be.roots.taconic.pricingguide.service.DefaultService;
import be.roots.taconic.pricingguide.util.HttpUtil;
import be.roots.taconic.pricingguide.util.JsonUtil;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.io.IOException;
import java.util.*;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;

@Service
public class ModelRepositoryImpl implements ModelRepository {

    private final static Logger LOGGER = Logger.getLogger(ModelRepositoryImpl.class);

    @Autowired
    private DefaultService defaultService;

    private final LoadingCache<String, Model> modelLoadingCache = CacheBuilder.newBuilder().maximumSize(10)
            .expireAfterAccess(1, TimeUnit.HOURS).build(new CacheLoader<String, Model>() {
                public Model load(String key) throws IOException {
                    final String jsonAsString = HttpUtil.readString(
                            defaultService.getModelUrl() + "/" + key + ".json", defaultService.getUserName(),
                            defaultService.getPassword());
                    if (jsonAsString != null) {
                        return JsonUtil.asObject(jsonAsString, Model.class);
                    }
                    return null;
                }
            });

    @Override
    public Model findOne(String key) {
        try {
            return modelLoadingCache.get(key);
        } catch (RuntimeException | ExecutionException e) {
            LOGGER.error(e.getLocalizedMessage(), e);
        }
        return null;
    }

    @Override
    public List<Model> findFor(List<String> modelList) throws IOException {

        final List<Model> models = new ArrayList<>();

        if (!CollectionUtils.isEmpty(modelList)) {

            // make the modelList a set of unique ids
            final Set<String> modelIds = new HashSet<>(modelList);

            // check if "all" is passed; if so execute findAll
            for (String modelId : modelIds) {
                if ("all".equalsIgnoreCase(modelId)) {
                    return findAll();
                }
            }

            // find the models based on their ids
            for (String modelId : modelIds) {
                final Model model = findOne(modelId);
                if (model != null) {
                    models.add(model);
                } else {
                    LOGGER.error("Couldn't find model for " + modelId);
                }
            }
        }

        return models;
    }

    @Override
    public List<Model> findAll() throws IOException {
        final String jsonAsString = HttpUtil.readString(defaultService.getModelCatalogUrl(),
                defaultService.getUserName(), defaultService.getPassword());
        List<HashMap> catalog = null;
        if (jsonAsString != null) {
            catalog = JsonUtil.asObject(jsonAsString, List.class);
        }

        if (!CollectionUtils.isEmpty(catalog)) {

            final List<Model> all = new ArrayList<>();
            for (HashMap entry : catalog) {
                all.add(findOne((String) entry.get("catalog_id")));
            }
            return all;

        }

        return new ArrayList<>();
    }

}