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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jclouds.virtualbox.functions.admin;
import static com.google.common.base.Preconditions.checkNotNull;
import static org.jclouds.util.Closeables2.closeQuietly;
import static org.jclouds.virtualbox.config.VirtualBoxConstants.VIRTUALBOX_WORKINGDIR;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import javax.annotation.Resource;
import javax.inject.Inject;
import javax.inject.Named;
import org.jclouds.compute.reference.ComputeServiceConstants;
import org.jclouds.javax.annotation.Nullable;
import org.jclouds.logging.Logger;
import org.jclouds.rest.HttpAsyncClient;
import com.google.common.base.Function;
import com.google.common.base.Throwables;
import com.google.common.io.Files;
public class FileDownloadFromURI implements Function {
@Resource
@Named(ComputeServiceConstants.COMPUTE_LOGGER)
protected Logger logger = Logger.NULL;
private final HttpAsyncClient client;
private final String isosDir;
@Inject
public FileDownloadFromURI(HttpAsyncClient client, @Named(VIRTUALBOX_WORKINGDIR) String workingDir) {
this.client = client;
this.isosDir = workingDir + File.separator + "isos";
}
@Override
public File apply(@Nullable URI input) {
final File file = new File(isosDir, new File(input.getPath()).getName());
try {
if (!file.exists()) {
final InputStream inputStream = client.get(input).get();
checkNotNull(inputStream, "%s not found", input);
try {
Files.asByteSink(file).writeFrom(inputStream);
return file;
} catch (FileNotFoundException e) {
logger.error(e, "File %s could not be found", file.getPath());
} catch (IOException e) {
logger.error(e, "Error when downloading file %s", input.toString());
} finally {
closeQuietly(inputStream);
}
return null;
} else {
logger.debug("File %s already exists. Skipping download", file.getPath());
return file;
}
} catch (Exception e) {
throw Throwables.propagate(e);
}
}
}