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XrdClient
XrdClientUrlSet.hh
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#ifndef _XRC_URLSET_H
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#define _XRC_URLSET_H
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/******************************************************************************/
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/* */
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/* X r d C l i e n t U r l S e t . h h */
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/* */
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/* Author: Fabrizio Furano (INFN Padova, 2004) */
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/* Adapted from TXNetFile (root.cern.ch) originally done by */
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/* Alvise Dorigo, Fabrizio Furano, INFN Padova, 2003 */
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/* Revised by G. Ganis, CERN, June 2005 */
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/* */
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/* This file is part of the XRootD software suite. */
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/* */
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/* XRootD is free software: you can redistribute it and/or modify it under */
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/* the terms of the GNU Lesser General Public License as published by the */
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/* Free Software Foundation, either version 3 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* XRootD is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
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/* License for more details. */
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/* */
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/* You should have received a copy of the GNU Lesser General Public License */
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/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
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/* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
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/* */
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/* The copyright holder's institutional names and contributor's names may not */
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/* be used to endorse or promote products derived from this software without */
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/* specific prior written permission of the institution or contributor. */
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/******************************************************************************/
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// //
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// A container for multiple urls to be resolved through DNS aliases //
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// //
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#include "
XrdClient/XrdClientConst.hh
"
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#include "
XrdClient/XrdClientVector.hh
"
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#include "
XrdOuc/XrdOucString.hh
"
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using namespace
std;
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class
XrdClientUrlInfo
;
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typedef
XrdClientVector<XrdClientUrlInfo*>
UrlArray
;
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//
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// Manages a set of XrdClientUrlInfo objects and provides a set
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// of utilities to resolve multiple addresses from the dns
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// and to pick urls sequentially and randomly an url
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//
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class
XrdClientUrlSet
{
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private
:
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UrlArray
fUrlArray
;
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UrlArray
fTmpUrlArray
;
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XrdOucString
fPathName
;
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bool
fIsValid
;
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unsigned
int
fSeed
;
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void
CheckPort(
int
&port);
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void
ConvertDNSAlias(
UrlArray
& urls,
XrdOucString
proto,
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XrdOucString
host,
XrdOucString
file);
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double
GetRandom(
int
seed = 0);
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public
:
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XrdClientUrlSet
(
XrdOucString
urls);
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~
XrdClientUrlSet
();
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// Returns the final resolved list of servers
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XrdOucString
GetServers();
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// Gets the subsequent Url, the one after the last given
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XrdClientUrlInfo
*GetNextUrl();
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// From the remaining urls we pick a random one. Without reinsert.
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// i.e. while there are not considered urls, never pick an already seen one
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XrdClientUrlInfo
*GetARandomUrl();
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// Given a seed, use that to pick an url
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// the effect will be that, given the same list, the same seed will pick the same url
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XrdClientUrlInfo
*GetARandomUrl(
unsigned
int
seed);
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void
Rewind();
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void
ShowUrls();
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void
EraseUrl(
XrdClientUrlInfo
*url);
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// Returns the number of urls
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int
Size
() {
return
fUrlArray.GetSize(); }
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// Returns the pathfile extracted from the CTOR's argument
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XrdOucString
GetFile
() {
return
fPathName; }
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bool
IsValid
() {
return
fIsValid; }
// Spot malformations
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};
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#endif
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