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BerkeleyDatabase Class Reference

An instance of this class represents one database. More...

#include <bdb.h>

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Public Member Functions

 BerkeleyDatabase ()=delete
 
 BerkeleyDatabase (std::shared_ptr< BerkeleyEnvironment > env, std::string filename)
 Create DB handle to real database. More...
 
 ~BerkeleyDatabase () override
 
void Open () override
 Open the database if it is not already opened. More...
 
bool Rewrite (const char *pszSkip=nullptr) override
 Rewrite the entire database on disk, with the exception of key pszSkip if non-zero. More...
 
void AddRef () override
 Indicate the a new database user has began using the database. More...
 
void RemoveRef () override
 Indicate that database user has stopped using the database and that it could be flushed or closed. More...
 
bool Backup (const std::string &strDest) const override
 Back up the entire database to a file. More...
 
void Flush () override
 Make sure all changes are flushed to database file. More...
 
void Close () override
 Flush to the database file and close the database. More...
 
bool PeriodicFlush () override
 
void IncrementUpdateCounter () override
 
void ReloadDbEnv () override
 
bool Verify (bilingual_str &error)
 Verifies the environment and database file. More...
 
std::string Filename () override
 Return path to main database filename. More...
 
std::string Format () override
 
std::unique_ptr< DatabaseBatchMakeBatch (bool flush_on_close=true) override
 Make a BerkeleyBatch connected to this database. More...
 
- Public Member Functions inherited from WalletDatabase
 WalletDatabase ()
 Create dummy DB handle. More...
 
virtual ~WalletDatabase ()
 

Public Attributes

std::shared_ptr< BerkeleyEnvironmentenv
 Pointer to shared database environment. More...
 
std::unique_ptr< Db > m_db
 Database pointer. More...
 
std::string strFile
 
- Public Attributes inherited from WalletDatabase
std::atomic< int > m_refcount {0}
 Counts the number of active database users to be sure that the database is not closed while someone is using it. More...
 
std::atomic< unsigned int > nUpdateCounter
 
unsigned int nLastSeen
 
unsigned int nLastFlushed
 
int64_t nLastWalletUpdate
 

Detailed Description

An instance of this class represents one database.

For BerkeleyDB this is just a (env, strFile) tuple.

Definition at line 97 of file bdb.h.

Constructor & Destructor Documentation

◆ BerkeleyDatabase() [1/2]

BerkeleyDatabase::BerkeleyDatabase ( )
delete

◆ BerkeleyDatabase() [2/2]

BerkeleyDatabase::BerkeleyDatabase ( std::shared_ptr< BerkeleyEnvironment env,
std::string  filename 
)
inline

Create DB handle to real database.

Definition at line 103 of file bdb.h.

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◆ ~BerkeleyDatabase()

BerkeleyDatabase::~BerkeleyDatabase ( )
override

Definition at line 296 of file bdb.cpp.

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Member Function Documentation

◆ AddRef()

void BerkeleyDatabase::AddRef ( )
overridevirtual

Indicate the a new database user has began using the database.

Implements WalletDatabase.

Definition at line 789 of file bdb.cpp.

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◆ Backup()

bool BerkeleyDatabase::Backup ( const std::string &  strDest) const
overridevirtual

Back up the entire database to a file.

Implements WalletDatabase.

Definition at line 606 of file bdb.cpp.

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◆ Close()

void BerkeleyDatabase::Close ( )
overridevirtual

Flush to the database file and close the database.

Also close the environment if no other databases are open in it.

Implements WalletDatabase.

Definition at line 648 of file bdb.cpp.

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◆ Filename()

std::string BerkeleyDatabase::Filename ( )
inlineoverridevirtual

Return path to main database filename.

Implements WalletDatabase.

Definition at line 147 of file bdb.h.

◆ Flush()

void BerkeleyDatabase::Flush ( )
overridevirtual

Make sure all changes are flushed to database file.

Implements WalletDatabase.

Definition at line 643 of file bdb.cpp.

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◆ Format()

std::string BerkeleyDatabase::Format ( )
inlineoverridevirtual

Implements WalletDatabase.

Definition at line 149 of file bdb.h.

◆ IncrementUpdateCounter()

void BerkeleyDatabase::IncrementUpdateCounter ( )
overridevirtual

Implements WalletDatabase.

Definition at line 385 of file bdb.cpp.

◆ MakeBatch()

std::unique_ptr< DatabaseBatch > BerkeleyDatabase::MakeBatch ( bool  flush_on_close = true)
overridevirtual

Make a BerkeleyBatch connected to this database.

Implements WalletDatabase.

Definition at line 806 of file bdb.cpp.

◆ Open()

void BerkeleyDatabase::Open ( )
overridevirtual

Open the database if it is not already opened.

Implements WalletDatabase.

Definition at line 325 of file bdb.cpp.

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◆ PeriodicFlush()

bool BerkeleyDatabase::PeriodicFlush ( )
overridevirtual

Implements WalletDatabase.

Definition at line 579 of file bdb.cpp.

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◆ ReloadDbEnv()

void BerkeleyDatabase::ReloadDbEnv ( )
overridevirtual

Implements WalletDatabase.

Definition at line 653 of file bdb.cpp.

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◆ RemoveRef()

void BerkeleyDatabase::RemoveRef ( )
overridevirtual

Indicate that database user has stopped using the database and that it could be flushed or closed.

Implements WalletDatabase.

Definition at line 799 of file bdb.cpp.

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◆ Rewrite()

bool BerkeleyDatabase::Rewrite ( const char *  pszSkip = nullptr)
overridevirtual

Rewrite the entire database on disk, with the exception of key pszSkip if non-zero.

Implements WalletDatabase.

Definition at line 452 of file bdb.cpp.

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◆ Verify()

bool BerkeleyDatabase::Verify ( bilingual_str error)

Verifies the environment and database file.

Definition at line 261 of file bdb.cpp.

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Member Data Documentation

◆ env

std::shared_ptr<BerkeleyEnvironment> BerkeleyDatabase::env

Pointer to shared database environment.

Normally there is only one BerkeleyDatabase object per BerkeleyEnvivonment, but in the special, backwards compatible case where multiple wallet BDB data files are loaded from the same directory, this will point to a shared instance that gets freed when the last data file is closed.

Definition at line 159 of file bdb.h.

◆ m_db

std::unique_ptr<Db> BerkeleyDatabase::m_db

Database pointer.

This is initialized lazily and reset during flushes, so it can be null.

Definition at line 162 of file bdb.h.

◆ strFile

std::string BerkeleyDatabase::strFile

Definition at line 164 of file bdb.h.


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