/**
* @param sourceFile File to read from
* @return List of String objects with the shas
*/
public static FileRequestFileContent readRequestFile(final File sourceFile) {
if (!sourceFile.isFile() || !(sourceFile.length() > 0)) {
return null;
}
Document d = null;
try {
d = XMLTools.parseXmlFile(sourceFile.getPath());
} catch (final Throwable t) {
logger.log(Level.SEVERE, "Exception in readRequestFile, during XML parsing", t);
return null;
}
if (d == null) {
logger.log(Level.SEVERE, "Could'nt parse the request file");
return null;
}
final Element rootNode = d.getDocumentElement();
if (rootNode.getTagName().equals(TAG_FrostFileRequestFile) == false) {
logger.severe(
"Error: xml request file does not contain the root tag '"
+ TAG_FrostFileRequestFile
+ "'");
return null;
}
final String timeStampStr = XMLTools.getChildElementsTextValue(rootNode, TAG_timestamp);
if (timeStampStr == null) {
logger.severe("Error: xml file does not contain the tag '" + TAG_timestamp + "'");
return null;
}
final long timestamp = Long.parseLong(timeStampStr);
final List<Element> nodelist = XMLTools.getChildElementsByTagName(rootNode, TAG_shaList);
if (nodelist.size() != 1) {
logger.severe("Error: xml request files must contain only one element '" + TAG_shaList + "'");
return null;
}
final Element rootShaNode = nodelist.get(0);
final List<String> shaList = new LinkedList<String>();
final List<Element> xmlKeys = XMLTools.getChildElementsByTagName(rootShaNode, TAG_sha);
for (final Element el : xmlKeys) {
final Text txtname = (Text) el.getFirstChild();
if (txtname == null) {
continue;
}
final String sha = txtname.getData();
shaList.add(sha);
}
final FileRequestFileContent content = new FileRequestFileContent(timestamp, shaList);
return content;
}
/**
* Enqueue a direct GET if not already enqueued, or already downloaded to download dir.
*
* @return true if item was enqueued
*/
public boolean maybeEnqueueDirectGet(
final FrostDownloadItem dlItem, final long expectedFileSize) {
if (!isDirectTransferInProgress(dlItem)) {
final File targetFile = new File(dlItem.getDownloadFilename());
if (!targetFile.isFile() || targetFile.length() != expectedFileSize) {
directTransferQueue.appendItemToQueue(dlItem);
return true;
}
}
return false;
}