/*
* @see com.painiu.pnfs.File#getInputStream()
*/
public InputStream getInputStream() throws PNFSException, IOException {
InputStream in = PNFS.httpGetFile(getPaths());
if (in == null) {
throw new IOException("Can not read remote file");
}
return in;
}
/*
* @see com.painiu.pnfs.File#store()
*/
public void store() throws PNFSException {
Response rsp = createOpen();
List<Path> paths = parsePaths(rsp);
Path path = PNFS.httpPutFile(file, paths);
if (path == null) {
throw new PNFSException("Failed to send file to YPFS storage node");
}
try {
createClose(path);
} catch (PNFSException e) {
// rollback
PNFS.httpDeleteFile(path.getPath());
throw e;
}
}
protected List<String> getPaths() throws PNFSException {
Request request = createGetPathsRequest();
Response rsp = PNFS.request(request);
Map<String, String> args = rsp.getArgs();
int num = 0;
try {
num = Integer.parseInt(args.get("paths"));
} catch (NumberFormatException e) {
throw new PNFSException("invalid response from ypfs server");
}
List<String> paths = new ArrayList<String>(num);
for (int i = 1; i < num + 1; i++) {
String path = args.get("path" + i);
if (path != null) {
paths.add(path);
}
}
return paths;
}
protected Response createClose(Path path) {
Request request = createCloseRequest(path);
return PNFS.request(request, 2);
}
protected Response createOpen() {
Response rsp = PNFS.request(Command.CREATE_OPEN, this);
setFilename(rsp.getArgs().get("filename"));
return rsp;
}
/*
* @see com.painiu.pnfs.File#delete()
*/
public void delete() throws PNFSException {
PNFS.delete(this);
}