XrdCmsState.hh

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#ifndef __XRDCMSSTATE_H_
#define __XRDCMSSTATE_H_
/******************************************************************************/
/*                                                                            */
/*                        X r d C m s S t a t e . h h                         */
/*                                                                            */
/* (c) 2007 by the Board of Trustees of the Leland Stanford, Jr., University  */
/*                            All Rights Reserved                             */
/*   Produced by Andrew Hanushevsky for Stanford University under contract    */
/*              DE-AC02-76-SFO0515 with the Department of Energy              */
/*                                                                            */
/* This file is part of the XRootD software suite.                            */
/*                                                                            */
/* XRootD is free software: you can redistribute it and/or modify it under    */
/* the terms of the GNU Lesser General Public License as published by the     */
/* Free Software Foundation, either version 3 of the License, or (at your     */
/* option) any later version.                                                 */
/*                                                                            */
/* XRootD is distributed in the hope that it will be useful, but WITHOUT      */
/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or      */
/* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public       */
/* License for more details.                                                  */
/*                                                                            */
/* You should have received a copy of the GNU Lesser General Public License   */
/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file  */
/* COPYING (GPL license).  If not, see <http://www.gnu.org/licenses/>.        */
/*                                                                            */
/* The copyright holder's institutional names and contributor's names may not */
/* be used to endorse or promote products derived from this software without  */
/* specific prior written permission of the institution or contributor.       */
/******************************************************************************/
 
#include "XrdSys/XrdSysPthread.hh"
#include "XrdCms/XrdCmsTypes.hh"
 
class XrdLink;
 
class XrdCmsState
{
public:
 
int   Suspended;
int   NoStaging;
 
void  Enable();
 
void *Monitor();
 
int   Port();
 
void  sendState(XrdLink *Link);
 
void  Set(int ncount);
void  Set(int ncount, int isman, const char *AdminPath);
 
enum  StateType {Active = 0, Counts, FrontEnd, Space, Stage};
 
void  Update(StateType StateT, int ActivVal, int StageVal=0);
 
      XrdCmsState();
     ~XrdCmsState() {}
  
static const char SRV_Suspend = 1;
static const char FES_Suspend = 2;
static const char All_Suspend = 3;
static const char All_NoStage = 4;
 
private:
unsigned char Status(int Changes, int theState);
 
XrdSysSemaphore mySemaphore;
XrdSysMutex     myMutex;
 
const char     *NoStageFile;
const char     *SuspendFile;
 
int             minNodeCnt;   // Minimum number of needed subscribers
int             numActive;    // Number of active subscribers
int             numStaging;   // Number of subscribers that can stage
int             dataPort;     // Current data port number
 
char            currState;    // Current  state
char            prevState;    // Previous state
char            feOK;         // Front end functioning
char            noSpace;      // We don't have enough space
char            adminSuspend; // Admin asked for suspension
char            adminNoStage; // Admin asked for no staging
char            isMan;        // We are a manager (i.e., have redirectors)
char            Enabled;      // We are now enabled for reporting
};
 
namespace XrdCms
{
extern    XrdCmsState CmsState;
}
#endif