/* Copyright 2011, Google Inc. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of Google Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package com.google.refine.importing; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.HashSet; import java.util.LinkedList; import java.util.List; import java.util.Map; import java.util.Properties; import java.util.Set; import java.util.Timer; import java.util.TimerTask; import org.apache.commons.io.FileUtils; import org.json.JSONException; import org.json.JSONWriter; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.google.refine.RefineServlet; import edu.mit.simile.butterfly.ButterflyModule; public class ImportingManager { static public class Format { final public String id; final public String label; final public boolean download; final public String uiClass; final public ImportingParser parser; private Format( String id, String label, boolean download, String uiClass, ImportingParser parser ) { this.id = id; this.label = label; this.download = download; this.uiClass = uiClass; this.parser = parser; } } final static Logger logger = LoggerFactory.getLogger("importing"); static private RefineServlet servlet; static private File importDir; final static private Map jobs = new HashMap(); // Mapping from format to label, e.g., "text" to "Text files", "text/xml" to "XML files" final static public Map formatToRecord = new HashMap(); // Mapping from format to guessers final static public Map> formatToGuessers = new HashMap>(); // Mapping from file extension to format, e.g., ".xml" to "text/xml" final static public Map extensionToFormat = new HashMap(); // Mapping from mime type to format, e.g., "application/json" to "text/json" final static public Map mimeTypeToFormat = new HashMap(); // URL rewriters final static public Set urlRewriters = new HashSet(); // Mapping from controller name to controller final static public Map controllers = new HashMap(); // timer for periodically deleting stale importing jobs static private Timer _timer; final static private long s_timerPeriod = 1000 * 60 * 10; // 10 minutes final static private long s_stalePeriod = 1000 * 60 * 60; // 60 minutes static private class CleaningTimerTask extends TimerTask { @Override public void run() { try { cleanUpStaleJobs(); } finally { _timer.schedule(new CleaningTimerTask(), s_timerPeriod); // we don't use scheduleAtFixedRate because that might result in // bunched up events when the computer is put in sleep mode } } } static public void initialize(RefineServlet servlet) { ImportingManager.servlet = servlet; _timer = new Timer("autosave"); _timer.schedule(new CleaningTimerTask(), s_timerPeriod); } static public void registerFormat(String format, String label) { registerFormat(format, label, null, null); } static public void registerFormat(String format, String label, String uiClass, ImportingParser parser) { formatToRecord.put(format, new Format(format, label, true, uiClass, parser)); } static public void registerFormat( String format, String label, boolean download, String uiClass, ImportingParser parser) { formatToRecord.put(format, new Format(format, label, download, uiClass, parser)); } static public void registerFormatGuesser(String format, FormatGuesser guesser) { List guessers = formatToGuessers.get(format); if (guessers == null) { guessers = new LinkedList(); formatToGuessers.put(format, guessers); } guessers.add(0, guesser); // prepend so that newer guessers take priority } static public void registerExtension(String extension, String format) { extensionToFormat.put(extension.startsWith(".") ? extension : ("." + extension), format); } static public void registerMimeType(String mimeType, String format) { mimeTypeToFormat.put(mimeType, format); } static public void registerUrlRewriter(UrlRewriter urlRewriter) { urlRewriters.add(urlRewriter); } static public void registerController(ButterflyModule module, String name, ImportingController controller) { String key = module.getName() + "/" + name; controllers.put(key, controller); controller.init(servlet); } static public File getImportDir() { if (importDir == null) { File tempDir = servlet.getTempDir(); importDir = tempDir == null ? new File(".import-temp") : new File(tempDir, "import"); if (importDir.exists()) { try { // start fresh FileUtils.deleteDirectory(importDir); } catch (IOException e) { } } importDir.mkdirs(); } return importDir; } static public ImportingJob createJob() { long id = System.currentTimeMillis() + (long) (Math.random() * 1000000); File jobDir = new File(getImportDir(), Long.toString(id)); ImportingJob job = new ImportingJob(id, jobDir); jobs.put(id, job); return job; } static public ImportingJob getJob(long id) { return jobs.get(id); } static public void disposeJob(long id) { ImportingJob job = getJob(id); if (job != null) { job.dispose(); jobs.remove(id); } } static public void writeConfiguration(JSONWriter writer, Properties options) throws JSONException { writer.object(); writer.key("formats"); writer.object(); for (String format : formatToRecord.keySet()) { Format record = formatToRecord.get(format); writer.key(format); writer.object(); writer.key("id"); writer.value(record.id); writer.key("label"); writer.value(record.label); writer.key("download"); writer.value(record.download); writer.key("uiClass"); writer.value(record.uiClass); writer.endObject(); } writer.endObject(); writer.key("mimeTypeToFormat"); writer.object(); for (String mimeType : mimeTypeToFormat.keySet()) { writer.key(mimeType); writer.value(mimeTypeToFormat.get(mimeType)); } writer.endObject(); writer.key("extensionToFormat"); writer.object(); for (String extension : extensionToFormat.keySet()) { writer.key(extension); writer.value(extensionToFormat.get(extension)); } writer.endObject(); writer.endObject(); } static public String getFormatFromFileName(String fileName) { int start = 0; while (true) { int dot = fileName.indexOf('.', start); if (dot < 0) { break; } String extension = fileName.substring(dot); String format = extensionToFormat.get(extension); if (format != null) { return format; } else { start = dot + 1; } } return null; } static public String getFormatFromMimeType(String mimeType) { return mimeTypeToFormat.get(mimeType); } static public String getFormat(String fileName, String mimeType) { String fileNameFormat = getFormatFromFileName(fileName); String mimeTypeFormat = mimeType == null ? null : getFormatFromMimeType(mimeType); if (mimeTypeFormat == null) { return fileNameFormat; } else if (fileNameFormat == null) { return mimeTypeFormat; } else if (fileNameFormat.startsWith(mimeTypeFormat)) { // file name-based format is more specific return fileNameFormat; } else { return mimeTypeFormat; } } static private void cleanUpStaleJobs() { long now = System.currentTimeMillis(); for (Long id : new HashSet(jobs.keySet())) { ImportingJob job = jobs.get(id); if (job != null && !job.updating && now - job.lastTouched > s_stalePeriod) { job.dispose(); jobs.remove(id); logger.info("Disposed " + id); } } } }