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- /*
- * Copyright (c) 2006-2014 DMDirc Developers
- *
- * 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 com.dmdirc.updater.retrieving;
-
- import com.dmdirc.commandline.CommandLineOptionsModule.Directory;
- import com.dmdirc.commandline.CommandLineOptionsModule.DirectoryType;
- import com.dmdirc.updater.UpdateComponent;
- import com.dmdirc.updater.checking.DownloadableUpdate;
- import com.dmdirc.util.collections.ListenerList;
- import com.dmdirc.util.io.DownloadListener;
- import com.dmdirc.util.io.Downloader;
- import org.slf4j.LoggerFactory;
-
- import javax.inject.Inject;
- import java.io.File;
- import java.io.IOException;
- import java.nio.file.Paths;
-
- /**
- * An {@link UpdateRetrievalStrategy} that downloads a file specified in a
- * {@link DownloadableUpdate}.
- */
- public class DownloadRetrievalStrategy extends TypeSensitiveRetrievalStrategy<DownloadableUpdate> {
-
- private static final org.slf4j.Logger LOG = LoggerFactory.getLogger(
- DownloadRetrievalStrategy.class);
- /** List of registered listeners. */
- private final ListenerList listenerList = new ListenerList();
- /** The directory to put temporary update files in. */
- private final String directory;
- /** Downloader to download files. */
- private final Downloader downloader;
-
- /**
- * Creates a new {@link DownloadRetrievalStrategy} which will place its temporary files in the
- * given directory.
- *
- * @param directory The directory to use to download files to#
- * @param downloader Used to download files
- */
- @Inject
- public DownloadRetrievalStrategy(@Directory(DirectoryType.BASE) final String directory,
- final Downloader downloader) {
- super(DownloadableUpdate.class);
-
- this.directory = directory;
- this.downloader = downloader;
- }
-
- @Override
- protected UpdateRetrievalResult retrieveImpl(final DownloadableUpdate checkResult) {
- try {
- final String file = getFileName();
-
- listenerList.getCallable(UpdateRetrievalListener.class)
- .retrievalProgressChanged(checkResult.getComponent(), 0);
-
- LOG.debug("Downloading file from {} to {}", checkResult.getUrl(), file);
- downloader.downloadPage(checkResult.getUrl().toString(), Paths.get(file),
- new DownloadProgressListener(checkResult.getComponent()));
-
- listenerList.getCallable(UpdateRetrievalListener.class)
- .retrievalCompleted(checkResult.getComponent());
-
- return new BaseSingleFileResult(checkResult, new File(file));
- } catch (IOException ex) {
- LOG.warn("I/O exception downloading update from {}", checkResult.getUrl(), ex);
- listenerList.getCallable(UpdateRetrievalListener.class)
- .retrievalFailed(checkResult.getComponent());
- }
-
- return new BaseRetrievalResult(checkResult, false);
- }
-
- /**
- * Creates a random local file name to download the remote file to.
- *
- * @return The full, local path to download the remote file to
- */
- private String getFileName() {
- return directory + File.separator + "update."
- + Math.round(10000 * Math.random()) + ".tmp";
- }
-
- @Override
- public void addUpdateRetrievalListener(final UpdateRetrievalListener listener) {
- listenerList.add(UpdateRetrievalListener.class, listener);
- }
-
- @Override
- public void removeUpdateRetrievalListener(final UpdateRetrievalListener listener) {
- listenerList.remove(UpdateRetrievalListener.class, listener);
- }
-
- /**
- * A {@link DownloadListener} which proxies progress updates on to this strategy's
- * {@link UpdateRetrievalListener}s.
- */
- private class DownloadProgressListener implements DownloadListener {
-
- /** The component to fire updates for. */
- private final UpdateComponent component;
-
- public DownloadProgressListener(final UpdateComponent component) {
- this.component = component;
- }
-
- @Override
- public void downloadProgress(final float percent) {
- listenerList.getCallable(UpdateRetrievalListener.class)
- .retrievalProgressChanged(component, percent);
- }
-
- @Override
- public void setIndeterminate(final boolean indeterminate) {
- // Do nothing
- }
-
- }
-
- }
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