class DownloadDb

A listing of files within multifiles for management of client-side synchronization with a server-provided set of files.

This class manages one copy of the database for the client, representing the files on the client system, and another copy for the server, representing the files the server has available.

Inheritance diagram

Inheritance diagram of DownloadDb

enum Status

Status of a multifile is stored in this enum Note these values are in increasing order of “doneness” So if you are decompressed, you are complete If you are extracted, you are decompressed and complete

enumerator Status_incomplete = 0
enumerator Status_complete = 1
enumerator Status_decompressed = 2
enumerator Status_extracted = 3
explicit DownloadDb(Ramfile &server_file, Filename &client_file)
explicit DownloadDb(Filename &server_file, Filename &client_file)
DownloadDb(DownloadDb const&) = default

Create a download db with these client and server dbs

Create a download db with these client and server dbs

Primarily used for testing.

void add_client_multifile(std::string server_mfname)
void add_version(Filename const &name, HashVal const &hash, int version)

Appends a new version of the file onto the end of the list, or changes the hash associated with a version previously added.

Note: version numbers start at 1

bool client_multifile_complete(std::string mfname) const

A multifile is complete when it is completely downloaded. Note: it may already be decompressed or extracted and it is still complete

bool client_multifile_decompressed(std::string mfname) const
bool client_multifile_exists(std::string mfname) const

Queries from the Launcher

bool client_multifile_extracted(std::string mfname) const
void create_new_server_db(void)

Server side operations to create multifile records

Used on the server side makefiles to create a new clean server db

void delete_client_multifile(std::string mfname)

Operations on multifiles

void expand_client_multifile(std::string mfname)
HashVal get_client_multifile_hash(std::string mfname) const

Ask what version (told with the hash) this multifile is

Return the hash value of the file we are working on

std::string get_client_multifile_name(int index) const
Phase get_client_multifile_phase(std::string mfname) const
int get_client_multifile_size(std::string mfname) const
int get_client_num_multifiles(void) const
HashVal const &get_hash(Filename const &name, int version) const

Returns the MD5 hash associated with the indicated version of the indicated file.

int get_num_versions(Filename const &name) const

Returns the number of versions stored for the indicated file.

std::string get_server_file_name(std::string mfname, int index) const
HashVal get_server_multifile_hash(std::string mfname) const

Return the hash value of the server file

std::string get_server_multifile_name(int index) const
Phase get_server_multifile_phase(std::string mfname) const
int get_server_multifile_size(std::string mfname) const
int get_server_num_files(std::string mfname) const
int get_server_num_multifiles(void) const
int get_version(Filename const &name, HashVal const &hash) const

Returns the version number of this particular file, determined by looking up the hash generated from the file. Returns -1 if the version number cannot be determined.

bool has_version(Filename const &name) const

Returns true if the indicated file has version information, false otherwise. Some files recorded in the database may not bother to track versions.

void insert_new_version(Filename const &name, HashVal const &hash)

Inserts a new version 1 copy of the file, sliding all the other versions up by one.

void output(std::ostream &out) const
Db read_db(Filename &file, bool want_server_info)
Db read_db(Ramfile &file, bool want_server_info)
void server_add_file(std::string mfname, std::string fname)
void server_add_multifile(std::string mfname, Phase phase, int size, int status)
void set_client_multifile_complete(std::string mfname)
void set_client_multifile_decompressed(std::string mfname)
int set_client_multifile_delta_size(std::string mfname, int size)
void set_client_multifile_extracted(std::string mfname)
void set_client_multifile_hash(std::string mfname, HashVal val)

Set the hash value of file we are working on

void set_client_multifile_incomplete(std::string mfname)
void set_client_multifile_size(std::string mfname, int size)
void set_num_versions(Filename const &name, int num_versions)

Reduces the number of versions of a particular file stored in the ddb by throwing away all versions higher than the indicated index.

void set_server_multifile_hash(std::string mfname, HashVal val)

Set the hash value of file we are working on

void set_server_multifile_size(std::string mfname, int size)
void write(std::ostream &out) const
bool write_client_db(Filename &file)

Write a database file

bool write_db(Filename &file, Db db, bool want_server_info)
bool write_server_db(Filename &file)
void write_version_map(std::ostream &out) const