bea_Medium Class Reference
[IVD Back-End Agent]

#include <bea_medium.h>

Inheritance diagram for bea_Medium:

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Collaboration diagram for bea_Medium:

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List of all members.

---

Detailed Description

Definition at line 74 of file bea_medium.h.

Public Member Functions
	bea_Medium ()
virtual	~bea_Medium ()
UInt32_t	GetSize () const
UInt32_t	GetVolumeCount () const
bea_Volume *	GetVolume (UInt32_t a_volNum)
bea_Volume *	GetCurrentVolume ()
UInt32_t	GetSysVolNumber () const
UInt32_t	GetCurVolNumber () const
virtual void	ChangeVolume (UInt32_t a_volNum, UInt32_t a_block=0)=0
virtual UInt32_t	ReadCurrentVolume ()=0
virtual void	Format (vector< UInt32_t > a_volSizes, bool a_duplAITMode)=0
virtual void	AppendVolume (UInt32_t a_volSize)=0
void	SetBarcode (const string &a_barcode)
const string &	GetBarcode () const
UInt32_t	GetMediumFamily () const
UInt32_t	GetMediumType () const
Int32_t	GetRMType () const
Int32_t	GetRMFamily () const
const string &	GetSerialNumber () const
bool	IsWORM () const
bool	IsMediumMemDetected ()
bool	IsMediumMemValid ()
bea_MediumMemory *	GetMediumMem ()
void	SetJobID (UInt64_t a_jobID)
UInt64_t	GetJobID () const
bool	DoMediumLogging () const
Protected Member Functions
virtual void	Refresh ()=0
void	SetSize (UInt32_t a_size)
void	SetCurrentVolume (UInt32_t a_volNumber)
void	SetWORM (bool a_isWorm)
void	SetMediumMem (bea_MediumMemory *const a_mm)
void	DeleteVolumes ()
void	AddVolume (bea_Volume *const a_volume)
Protected Attributes
string	m_barcode
string	m_serialNum
UInt32_t	m_mediumFamily
UInt32_t	m_mediumType
string	m_poolName
Static Private Member Functions
static void	DeleteVolume (bea_Volume *const a_volume)
Private Attributes
	log_CLASSID_m
bool	m_worm
UInt32_t	m_size
UInt32_t	m_currentVolume
vector< bea_Volume * >	m_volumes
bea_MediumMemory *	m_mediumMem
UInt64_t	m_jobID
bool	m_doMediaLog

---

Constructor & Destructor Documentation

bea_Medium::bea_Medium

(

)

Definition at line 44 of file bea_medium.cpp.

References cmn_GetEnvVariable(), dbg_LOW, log_DBG_m, log_FUNC_m, m_doMediaLog, and medLogName_c().

    : m_mediumFamily(bmf_UNKNOWN),
      m_mediumType(bmt_UNKNOWN),
      m_worm(false),
      m_size(0),
      m_currentVolume(0),
      m_mediumMem(NULL),
      m_doMediaLog(true) {

    log_FUNC_m(bea_Medium);

    string medLog = cmn_GetEnvVariable(medLogName_c);

    if (medLog == "no" || medLog == "false" || medLog == "0") {

        log_DBG_m(dbg_LOW,
            medLogName_c << " = " << medLog << ": Media logging disabled.");

        m_doMediaLog = false;
    };

    // Refresh() must be called in the constructors of the
    // derived classes.
}

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bea_Medium::~bea_Medium

(

)

[virtual]

Definition at line 71 of file bea_medium.cpp.

References DeleteVolumes(), and log_FUNC_m.

                        {
    log_FUNC_m(~bea_Medium);

    DeleteVolumes();
}

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---

Member Function Documentation

UInt32_t bea_Medium::GetSize

(

)

const

Definition at line 80 of file bea_medium.cpp.

References m_size.

Referenced by bea_DiskMedium::Format(), bea_DiskMedium::Refresh(), and bea_TapeMedium::RefreshTapeInfo().

                                   {
    return m_size;
}

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UInt32_t bea_Medium::GetVolumeCount

(

)

const

Definition at line 199 of file bea_medium.cpp.

References m_volumes.

Referenced by bea_DiskMedium::AppendVolume(), bea_TapeMedium::Format(), bea_DiskMedium::Format(), bea_Volume::ReadVolInfoFromMediumMem(), and bea_TapeMedium::RefreshMemoryInfo().

                                          {
    return m_volumes.size();
}

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bea_Volume * bea_Medium::GetVolume

(

UInt32_t

a_volNum

)

Definition at line 205 of file bea_medium.cpp.

References ie_INVALID_ARG, ie_MEDIUM_MEDERR, ivd_Error, log_FUNC_m, and m_volumes.

Referenced by bea_FRI::bea_FRI(), i_BackEndAgent_i::CloseMediumVolume(), bea_FRIThread::EraseSysVol(), bea_TapeMedium::Format(), bea_DiskMedium::Format(), GetCurrentVolume(), bea_MigrationThread::PrepareVolume(), i_BackEndAgent_i::ReadIDs(), and i_BackEndAgent_i::VerifyIDs().

                                                   {
    if (a_volNum < 1) {
        log_FUNC_m(GetVolume);
        throw ivd_Error(ie_INVALID_ARG, "Volume numbers start with 1!");
    }

    if (m_volumes.size() == 0) {
        throw ivd_Error(
            ie_MEDIUM_MEDERR, "Medium doesn't contain any volumes.", true);
    }

    if (a_volNum > m_volumes.size()) {
        ostringstream sstr;
        sstr
            << "Medium volume index overflow: "
            << a_volNum << " > " << m_volumes.size();
        throw ivd_Error(ie_INVALID_ARG, sstr.str(), true);
    }

    return m_volumes.at(a_volNum-1);
}

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bea_Volume * bea_Medium::GetCurrentVolume

(

)

Definition at line 229 of file bea_medium.cpp.

References GetVolume(), and m_currentVolume.

Referenced by bea_DupWriteThread::AppendVolume(), bea_TapeMedium::ChangeVolume(), bea_DiskMedium::ChangeVolume(), bea_FRI::CloseVolume(), bea_FRI::CreateFRI(), bea_FRI::PositionToStartOfFRI(), bea_MigrationThread::PrepareVolume(), bea_FRIThread::ProcessFromDataVol(), bea_FRIThread::ReadFromSysVol(), bea_DupReadThread::ReadMedVolume(), bea_RecallThread::Recall(), and bea_DupWriteThread::WriteMedVolume().

                                         {
    return GetVolume(m_currentVolume);
}

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UInt32_t bea_Medium::GetSysVolNumber

(

)

const

Definition at line 235 of file bea_medium.cpp.

References m_volumes, and bea_VolInfo_t::sysVolNum.

Referenced by bea_FRI::bea_FRI(), bea_FRI::CloseVolume(), bea_FRIThread::EraseSysVol(), and bea_FRIThread::ReadFromSysVol().

                                           {
    if (m_volumes.size() == 0) {
        return 0;
    }
    //#warning Check if this works properly without MIC.
    // Warning: May implicitelly read from MIC.
    const bea_VolInfo_t& vi = m_volumes[0]->GetVolumeInfo();
    return vi.sysVolNum;
}

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UInt32_t bea_Medium::GetCurVolNumber

(

)

const

Definition at line 247 of file bea_medium.cpp.

References m_currentVolume.

Referenced by bea_Volume::Init(), bea_FRI::PositionToStartOfFRI(), bea_MigrationThread::PrepareVolume(), bea_TapeMedium::ReadCurrentVolume(), bea_DiskMedium::ReadCurrentVolume(), bea_TapeVolume::ReadEstimSizes(), bea_DiskVolume::ReadEstimSizes(), bea_DupReadThread::ReadMedVolume(), bea_Volume::ReadVolInfoFromHeader(), bea_RecallThread::Recall(), and bea_DupWriteThread::WriteMedVolume().

                                           {
    return m_currentVolume;
}

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virtual void bea_Medium::ChangeVolume	(	UInt32_t	a_volNum,
		UInt32_t	a_block = 0
	)			[pure virtual]

Implemented in bea_DiskMedium, and bea_TapeMedium.

Referenced by bea_FRI::CloseVolume(), bea_FRIThread::EraseSysVol(), bea_Volume::Init(), bea_FRI::PositionToStartOfFRI(), bea_MigrationThread::PrepareVolume(), bea_FRIThread::ProcessFromDataVol(), bea_FRIThread::ReadFromSysVol(), i_BackEndAgent_i::ReadIDs(), bea_DupReadThread::ReadMedVolume(), bea_RecallThread::Recall(), and bea_DupWriteThread::WriteMedVolume().

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virtual UInt32_t bea_Medium::ReadCurrentVolume

(

)

[pure virtual]

Implemented in bea_DiskMedium, and bea_TapeMedium.

virtual void bea_Medium::Format	(	vector< UInt32_t >	a_volSizes,
		bool	a_duplAITMode
	)			[pure virtual]

Implemented in bea_DiskMedium, and bea_TapeMedium.

virtual void bea_Medium::AppendVolume

(

UInt32_t

a_volSize

)

[pure virtual]

Implemented in bea_DiskMedium, and bea_TapeMedium.

Referenced by bea_DupWriteThread::AppendVolume().

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void bea_Medium::SetBarcode

(

const string &

a_barcode

)

Definition at line 85 of file bea_medium.cpp.

References df_TCMMedium_t::barcode, evt_WARNING, ivd_BaseException::GetFriendly(), GetJobID(), bea_MediumMemory::GetMediumRecord(), IsMediumMemValid(), log_FUNC_A_m, log_WriteEvent(), log_WRN_m, m_barcode, m_mediumMem, and bea_MediumMemory::UpdateMediumRecord().

Referenced by bea_DiskMedium::bea_DiskMedium(), bea_TapeDrive::Open(), and bea_DiskDrive::Open().

                                                   {
    log_FUNC_A_m(SetBarcode, "bc: " << a_barcode);

    if (m_barcode != a_barcode) {
        if (!m_barcode.empty()) {
            ostringstream sstr;
            sstr
                << "Barcode of this medium changed from "
                << m_barcode << " to " << a_barcode << ".";

            log_WriteEvent(
                evt_WARNING, sstr.str(), "", GetJobID(), m_barcode);
        };
        m_barcode = a_barcode;

        // Update CM with new barcode
        if (IsMediumMemValid()) {
            try {
                df_TCMMedium_t mr = m_mediumMem->GetMediumRecord();
                memcpy(mr.barcode, m_barcode.data(), m_barcode.length());
                mr.barcode[m_barcode.length()] = '\0';
                m_mediumMem->UpdateMediumRecord(mr);
            }
            catch (ivd_Exception &ie) {
                log_WRN_m(
                    "Updating barcode in cartridge memory failed (" << m_barcode << "): " << ie.GetFriendly());
            };
        }
    };
}

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const string & bea_Medium::GetBarcode

(

)

const

Definition at line 118 of file bea_medium.cpp.

References m_barcode.

Referenced by bea_DupWriteThread::AppendVolume(), bea_MigrationThread::CheckFRI(), bea_FRIThread::CheckFRI(), bea_FRIThread::EraseSysVol(), bea_TapeMedium::Format(), bea_MigrationThread::Migrate(), bea_MigrationThread::PrepareVolume(), bea_FRI::ReadFRIStart(), bea_Volume::ReadVolInfoFromHeader(), bea_TapeVolume::Rewind(), bea_DiskVolume::Rewind(), bea_VolumeReader::Run(), bea_TapeVolume::SeekBlock(), bea_DiskVolume::SeekBlock(), bea_TapeVolume::SeekEOD(), bea_DiskVolume::SeekEOD(), bea_TapeVolume::SeekFileMark(), bea_DiskVolume::SeekFileMark(), bea_Volume::UpdateMediumMem(), bea_MigrationThread::WriteBlock(), bea_TapeVolume::WriteFileMarks(), and bea_DiskVolume::WriteFileMarks().

                                           {
    return m_barcode;
}

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UInt32_t bea_Medium::GetMediumFamily

(

)

const

Definition at line 130 of file bea_medium.cpp.

References m_mediumFamily.

Referenced by bea_TapeMedium::AppendVolume(), bea_TapeMedium::Format(), bea_Volume::MustDumpFRI(), i_BackEndAgent_i::MustReadPosition(), and bea_TapeVolume::ReadEstimSizes().

                                           {
    return m_mediumFamily;
}

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UInt32_t bea_Medium::GetMediumType

(

)

const

Definition at line 124 of file bea_medium.cpp.

References m_mediumType.

                                         {
    return m_mediumType;
}

Int32_t bea_Medium::GetRMType

(

)

const

Definition at line 136 of file bea_medium.cpp.

References bmt_AIT1, bmt_AIT2, bmt_AIT3, bmt_AIT5, bmt_DDS1, bmt_DDS2, bmt_DDS3, bmt_DDS4, bmt_DISK, bmt_LTO, bmt_LTO2, bmt_LTO3, bmt_LTO4, bmt_LTO5, bmt_SAIT1, bmt_VXA320, m_mediumType, m_worm, mt_AIT_1, mt_AIT_1_WORM, mt_AIT_2, mt_AIT_2_WORM, mt_AIT_3, mt_AIT_3_WORM, mt_AIT_5, mt_AIT_5_WORM, mt_DDS_1, mt_DDS_2, mt_DDS_3, mt_DDS_4, mt_DISK, mt_LTO_1, mt_LTO_2, mt_LTO_3, mt_LTO_3_WORM, mt_LTO_4, mt_LTO_4_WORM, mt_LTO_5, mt_SAIT_1, mt_UNKNOWN, and mt_VXA_320.

Referenced by bea_RecallThread::Recall().

                                    {
    if (!m_worm) {
        switch (m_mediumType) {
            case bmt_DDS1:      return mt_DDS_1;
            case bmt_DDS2:      return mt_DDS_2;
            case bmt_DDS3:      return mt_DDS_3;
            case bmt_DDS4:      return mt_DDS_4;
            case bmt_AIT1:      return mt_AIT_1;
            case bmt_AIT2:      return mt_AIT_2;
            case bmt_AIT3:      return mt_AIT_3;
            case bmt_AIT5:      return mt_AIT_5;
            case bmt_SAIT1:     return mt_SAIT_1;
            case bmt_LTO :      return mt_LTO_1;
            case bmt_LTO2:      return mt_LTO_2;
            case bmt_LTO3:      return mt_LTO_3;
            case bmt_LTO4:      return mt_LTO_4;
            case bmt_LTO5:      return mt_LTO_5;
            case bmt_DISK:      return mt_DISK;
            case bmt_VXA320:    return mt_VXA_320;
            default:            return mt_UNKNOWN;
        }
    }
    else {
        switch (m_mediumType) {
            case bmt_AIT1:  return mt_AIT_1_WORM;
            case bmt_AIT2:  return mt_AIT_2_WORM;
            case bmt_AIT3:  return mt_AIT_3_WORM;
            case bmt_AIT5:  return mt_AIT_5_WORM;
            case bmt_LTO3:  return mt_LTO_3_WORM;
            case bmt_LTO4:  return mt_LTO_4_WORM;
            default:        return mt_UNKNOWN;
        }
    }
}

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Int32_t bea_Medium::GetRMFamily

(

)

const

Definition at line 173 of file bea_medium.cpp.

References bmf_AIT, bmf_DDS, bmf_DISK, bmf_LTO, bmf_SAIT, bmf_VXA, m_mediumFamily, mf_AIT, mf_DDS, mf_DISK, mf_LTO, mf_SAIT, mf_UNKNOWN, and mf_VXA.

                                      {
    switch (m_mediumFamily) {
        case bmf_DDS :  return mf_DDS;
        case bmf_AIT :  return mf_AIT;
        case bmf_SAIT:  return mf_SAIT;
        case bmf_LTO :  return mf_LTO;
        case bmf_DISK:  return mf_DISK;
        case bmf_VXA:   return mf_VXA;
        default:        return mf_UNKNOWN;
    }
}

const string & bea_Medium::GetSerialNumber

(

)

const

Definition at line 193 of file bea_medium.cpp.

References m_serialNum.

                                                {
    return m_serialNum;
}

bool bea_Medium::IsWORM

(

)

const

Definition at line 187 of file bea_medium.cpp.

References m_worm.

Referenced by bea_FRI::CreateFRI(), bea_FRI::DeleteFRIOnVolume(), bea_FRIThread::EraseSysVol(), bea_TapeMedium::Format(), and bea_Volume::Init().

                              {
    return m_worm;
}

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bool bea_Medium::IsMediumMemDetected

(

)

Definition at line 253 of file bea_medium.cpp.

References dbg_LOW, bea_MediumMemory::IsDetected(), log_DBG_m, log_FUNC_m, m_mediumMem, and NULL.

Referenced by bea_Volume::UpdateMediumMem().

                                     {
    log_FUNC_m(IsMediumMemDetected);
    if (m_mediumMem == NULL) {
        log_DBG_m(dbg_LOW, "Medium Memory object is NULL");
        return false;
    }
    else {
        return m_mediumMem->IsDetected();
    }
}

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bool bea_Medium::IsMediumMemValid

(

)

Definition at line 266 of file bea_medium.cpp.

References dbg_LOW, bea_MediumMemory::IsValid(), log_DBG_m, log_FUNC_m, m_mediumMem, and NULL.

Referenced by bea_TapeDrive::Close(), bea_MigrationThread::PrepareVolume(), bea_FRI::ReadFRI(), bea_Volume::ReadVolInfoFromMediumMem(), bea_RecallThread::Recall(), SetBarcode(), and bea_Volume::UpdateMediumMem().

                                  {
    log_FUNC_m(IsMediumMemValid);

    if (m_mediumMem == NULL) {
        log_DBG_m(dbg_LOW, "Medium Memory object is NULL");
        return false;
    }
    else {
        return m_mediumMem->IsValid();
    }
}

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bea_MediumMemory * bea_Medium::GetMediumMem

(

)

Definition at line 280 of file bea_medium.cpp.

References m_mediumMem.

Referenced by bea_TapeDrive::Close(), bea_FRI::ReadFRI(), bea_Volume::ReadVolInfoFromMediumMem(), bea_RecallThread::Recall(), and bea_Volume::UpdateMediumMem().

                                           {
//    log_FUNC_m(GetMediumMem);
    return m_mediumMem;
}

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void bea_Medium::SetJobID

(

UInt64_t

a_jobID

)

Definition at line 287 of file bea_medium.cpp.

References m_jobID.

                                          {
    m_jobID = a_jobID;
}

UInt64_t bea_Medium::GetJobID

(

)

const

Definition at line 293 of file bea_medium.cpp.

References m_jobID.

Referenced by bea_TapeMedium::ChangeVolume(), bea_DiskMedium::ChangeVolume(), bea_TapeMedium::Format(), bea_Volume::GetJobID(), and SetBarcode().

                                    {
    return m_jobID;
}

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bool bea_Medium::DoMediumLogging

(

)

const

Definition at line 299 of file bea_medium.cpp.

References m_doMediaLog.

Referenced by bea_TapeMedium::ChangeVolume(), bea_DiskMedium::ChangeVolume(), and bea_Volume::DoMediumLogging().

                                       {
    return m_doMediaLog;
}

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virtual void bea_Medium::Refresh

(

)

[protected, pure virtual]

Implemented in bea_DiskMedium, and bea_TapeMedium.

void bea_Medium::SetSize

(

UInt32_t

a_size

)

[protected]

Definition at line 307 of file bea_medium.cpp.

References m_size.

Referenced by bea_DiskMedium::Refresh(), and bea_TapeMedium::RefreshTapeInfo().

                                        {
    m_size = a_size;
}

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void bea_Medium::SetCurrentVolume

(

UInt32_t

a_volNumber

)

[protected]

Definition at line 313 of file bea_medium.cpp.

References ie_INVALID_ARG, ivd_Error, log_FUNC_m, and m_currentVolume.

Referenced by bea_TapeMedium::ChangeVolume(), bea_DiskMedium::ChangeVolume(), bea_TapeMedium::ReadCurrentVolume(), and bea_DiskMedium::ReadCurrentVolume().

                                                      {
    if (a_volNumber < 1) {
        log_FUNC_m(SetCurrentVolume);
        throw ivd_Error(ie_INVALID_ARG, "Volume numbers start with 1!");
    }
    m_currentVolume = a_volNumber;
}

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void bea_Medium::SetWORM

(

bool

a_isWorm

)

[protected]

Definition at line 322 of file bea_medium.cpp.

References m_worm.

Referenced by bea_TapeMedium::DetectAITWORM(), bea_TapeMedium::DetectLTOWORM(), bea_DiskMedium::Refresh(), and bea_TapeMedium::RefreshTapeInfo().

                                      {
    m_worm = a_isWorm;
}

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void bea_Medium::SetMediumMem

(

bea_MediumMemory *const

a_mm

)

[protected]

Definition at line 328 of file bea_medium.cpp.

References m_mediumMem.

Referenced by bea_TapeMedium::bea_TapeMedium().

                                                          {
    m_mediumMem = a_mm;
}

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void bea_Medium::DeleteVolumes

(

)

[protected]

Definition at line 334 of file bea_medium.cpp.

References DeleteVolume(), and m_volumes.

Referenced by bea_DiskMedium::Refresh(), bea_TapeMedium::RefreshTapeInfo(), and ~bea_Medium().

                               {
    for_each(m_volumes.begin(), m_volumes.end(), bea_Medium::DeleteVolume);
    m_volumes.clear();
    m_volumes.reserve(50);
}

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void bea_Medium::AddVolume

(

bea_Volume *const

a_volume

)

[protected]

Definition at line 342 of file bea_medium.cpp.

References m_volumes.

Referenced by bea_DiskMedium::AppendVolume(), bea_DiskMedium::Refresh(), and bea_TapeMedium::RefreshTapeInfo().

                                                     {
    m_volumes.push_back(a_volume);
}

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void bea_Medium::DeleteVolume

(

bea_Volume *const

a_volume

)

[static, private]

Definition at line 350 of file bea_medium.cpp.

Referenced by DeleteVolumes().

                                                        {
    delete a_volume;
}

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---

Member Data Documentation

string bea_Medium::m_barcode [protected]

Definition at line 114 of file bea_medium.h.

Referenced by bea_TapeMedium::ChangeVolume(), bea_DiskMedium::ChangeVolume(), GetBarcode(), bea_DiskMedium::Refresh(), bea_TapeMedium::RefreshMemoryInfo(), bea_TapeMedium::RefreshTapeInfo(), and SetBarcode().

string bea_Medium::m_serialNum [protected]

Definition at line 115 of file bea_medium.h.

Referenced by GetSerialNumber(), bea_DiskMedium::Refresh(), bea_TapeMedium::RefreshMemoryInfo(), and bea_TapeMedium::RefreshTapeInfo().

UInt32_t bea_Medium::m_mediumFamily [protected]

Definition at line 116 of file bea_medium.h.

Referenced by bea_TapeMedium::bea_TapeMedium(), GetMediumFamily(), GetRMFamily(), bea_DiskMedium::Refresh(), and bea_TapeMedium::RefreshTapeInfo().

UInt32_t bea_Medium::m_mediumType [protected]

Definition at line 117 of file bea_medium.h.

Referenced by bea_TapeMedium::Format(), GetMediumType(), GetRMType(), bea_DiskMedium::Refresh(), and bea_TapeMedium::RefreshTapeInfo().

string bea_Medium::m_poolName [protected]

Definition at line 118 of file bea_medium.h.

bea_Medium::log_CLASSID_m [private]

Reimplemented in bea_DiskMedium, and bea_TapeMedium.

Definition at line 131 of file bea_medium.h.

bool bea_Medium::m_worm [private]

Definition at line 133 of file bea_medium.h.

Referenced by GetRMType(), IsWORM(), and SetWORM().

UInt32_t bea_Medium::m_size [private]

Definition at line 134 of file bea_medium.h.

Referenced by GetSize(), and SetSize().

UInt32_t bea_Medium::m_currentVolume [private]

Definition at line 136 of file bea_medium.h.

Referenced by GetCurrentVolume(), GetCurVolNumber(), and SetCurrentVolume().

vector<bea_Volume*> bea_Medium::m_volumes [private]

Definition at line 137 of file bea_medium.h.

Referenced by AddVolume(), DeleteVolumes(), GetSysVolNumber(), GetVolume(), and GetVolumeCount().

bea_MediumMemory* bea_Medium::m_mediumMem [private]

Reimplemented in bea_TapeMedium.

Definition at line 139 of file bea_medium.h.

Referenced by GetMediumMem(), IsMediumMemDetected(), IsMediumMemValid(), SetBarcode(), and SetMediumMem().

UInt64_t bea_Medium::m_jobID [private]

Definition at line 140 of file bea_medium.h.

Referenced by GetJobID(), and SetJobID().

bool bea_Medium::m_doMediaLog [private]

Definition at line 142 of file bea_medium.h.

Referenced by bea_Medium(), and DoMediumLogging().

---

The documentation for this class was generated from the following files:

• bea_medium.h
• bea_medium.cpp