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transaction.h

/***************************************************************
 *
 * Copyright (C) 1990-2007, Condor Team, Computer Sciences Department,
 * University of Wisconsin-Madison, WI.
 * 
 * Licensed 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.
 *
 ***************************************************************/


#ifndef __XACTION_H__
#define __XACTION_H__

#include <list>
#include <string>
#include "classad/sink.h"
#include "classad/view.h"

BEGIN_NAMESPACE( classad )

class ClassAd;
class ClassAdCollection;
      
class XactionRecord {
public:
      XactionRecord( ) { op = -1; key = ""; rec = 0; }
      bool operator==( const XactionRecord & ) const { return false; }
      bool operator< ( const XactionRecord & ) const { return false; }

      int   op;
      std::string key;
      ClassAd     *rec;
      ClassAd     *backup;
};

typedef std::list<XactionRecord> CollectionOpList;

class ServerTransaction {
public:
      ServerTransaction( );
      ~ServerTransaction( );

      inline void SetCollectionServer( ClassAdCollection *c ) { server=c; }
      inline void GetCollectionServer( ClassAdCollection *&c ){ c=server; } 
      inline void SetXactionName( const std::string &n ) { xactionName = n; }
      inline void GetXactionName(std::string &n ) const { n = xactionName; }
      inline void SetLocalXaction( bool l ) { local = l; }
      inline bool GetLocalXaction( ) const { return( local ); }

      void ClearRecords( );
      void AppendRecord( int, const std::string &, ClassAd * );
      bool Commit( );
      bool Log( FILE *fp, ClassAdUnParser *unp );
      ClassAd *ExtractErrorCause( );

      enum { ABSENT, ACTIVE, COMMITTED };

private:
      std::string                   xactionName;
      bool                          local;
      ClassAdCollection       *server;
      CollectionOpList        opList;

      int                                 xactionErrno;
      std::string                   xactionErrMsg;
      ClassAd                             *xactionErrCause;
};


class Sock;

class ClientTransaction {
public:
      ClientTransaction( );
      ~ClientTransaction( );

      inline void SetServerAddr( const std::string &a, int p ) { addr=a; port=p; }
      inline void GetServerAddr( std::string &a, int &p ) const { a=addr; p=port; }
      inline void SetXactionName( const std::string &n ) { xactionName = n; }
      inline void GetXactionName( std::string &n ) const { n = xactionName; }
      inline void SetXactionState( char s ) { state = s; }
      inline char GetXactionState( ) const { return( state ); }

      bool LogCommit( FILE *, ClassAdUnParser *unp );
      bool LogAckCommit( FILE *, ClassAdUnParser *unp );
      bool LogAbort( FILE *, ClassAdUnParser *unp );

      enum { ACTIVE, PENDING };

private:
      std::string xactionName, addr;
      int         port;
      char  state;
};


END_NAMESPACE

#endif /* __XACTION_H__ */

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