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// $Id$
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/**
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* Copyright (C) 2015 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package org.cybertaxonomy.utis.store;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
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import org.apache.commons.compress.compressors.gzip.GzipUtils;
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import org.apache.commons.compress.utils.IOUtils;
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import org.apache.commons.io.FileUtils;
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import org.apache.commons.io.FilenameUtils;
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import org.apache.http.client.ClientProtocolException;
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import org.apache.http.client.methods.CloseableHttpResponse;
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import org.apache.http.client.methods.HttpGet;
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import org.apache.http.impl.client.CloseableHttpClient;
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import org.apache.http.impl.client.HttpClients;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* @author a.kohlbecker
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* @date Oct 20, 2015
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*
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*/
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public abstract class Store {
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protected Logger logger = LoggerFactory.getLogger(Neo4jStore.class);
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private static final File tmpDir = new File(System.getProperty("java.io.tmpdir"));
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private static final File userHomeDir = new File(System.getProperty("user.home"));
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private static final File utisHome = new File(userHomeDir, ".utis");
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protected File storeLocation = null;
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public Store() throws Exception {
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storeLocation = new File(utisHome, storeName() + File.separator);
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if( !storeLocation.exists()) {
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storeLocation.mkdirs();
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logger.debug("new store location created");
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}
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initStoreEngine();
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}
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/**
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* @return
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*/
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protected abstract String storeName();
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/**
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* @param rdfFileUri
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*
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*/
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protected File downloadAndExtract(String rdfFileUri) {
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File expandedFile = null;
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CloseableHttpClient httpClient = HttpClients.createDefault();
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CloseableHttpResponse response;
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try {
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// 1. download and store in local filesystem in TMP
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logger.debug("downloading rdf file from " + rdfFileUri);
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HttpGet httpGet = new HttpGet(rdfFileUri);
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response = httpClient.execute(httpGet);
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String archiveFileName = FilenameUtils.getName(httpGet.getURI().getRawPath());
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File archiveFile = new File(tmpDir, archiveFileName);
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FileOutputStream fout = new FileOutputStream(archiveFile);
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IOUtils.copy(response.getEntity().getContent(), new FileOutputStream(archiveFile));
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fout.close();
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logger.debug(archiveFile.length() + " bytes downloaded to " + archiveFile.getCanonicalPath());
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// 2. extract the archive
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FileInputStream fin = new FileInputStream(archiveFile);
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InputStream ain = null;
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if(GzipUtils.isCompressedFilename(archiveFileName)) {
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logger.debug("Extracting GZIP file " + archiveFile.getCanonicalPath());
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ain = new GzipCompressorInputStream(fin);
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} else {
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// TO UNZIP
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//ArchiveInputStream ain = new ArchiveStreamFactory().createArchiveInputStream(ArchiveStreamFactory.ZIP, fin);
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}
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expandedFile = new File(tmpDir, GzipUtils.getUncompressedFilename(archiveFileName));
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fout = new FileOutputStream(expandedFile);
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IOUtils.copy(ain, fout);
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fout.close();
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fin.close();
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logger.debug("Extracted to " + expandedFile.getCanonicalPath());
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} catch (ClientProtocolException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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} catch (IOException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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return expandedFile;
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}
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/**
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*
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* @param rdfFileUri
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* the location of the file to load the rdf triples from
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* @throws Exception
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*/
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public void loadIntoStore(String ... rdfFileUri) throws Exception {
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stopStoreEngine();
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clear();
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initStoreEngine();
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for (String uri : rdfFileUri) {
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File localF = downloadAndExtract(uri);
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load(localF);
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}
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}
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protected abstract void initStoreEngine() throws Exception;
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protected abstract void stopStoreEngine() throws Exception;
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protected abstract void load(File rdfFile) throws Exception;
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protected void clear() throws IOException {
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if(storeLocation.exists()) {
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FileUtils.cleanDirectory(storeLocation);
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} else {
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storeLocation.mkdirs();
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}
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}
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}
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