Class ::nsmcp::SQLiteDatabase (public)
::nx::Class ::nsmcp::SQLiteDatabase
Defined in /usr/local/ns/tcl/nsmcp/database.tcl
- Testcases:
- No testcase defined.
Source code: :property pool:required :property {maxBytes:integer 1073741824} :variable path :method init {} { if {${:maxBytes}<4194304} { error "database maxBytes must be at least 4 MiB" } set db [:connect] $db close } :public method connect {} { # # Check out a session from the dedicated SQLite cache pool. # # Validate the persistent datasource, apply private session settings and # enforce the configured page budget; release resources on failure. # # @return A DatabaseSession object owning the checked-out handle. # if {![llength [info commands ns_db]]} { error "databasePool requires nsdb/nsdbsqlite loaded before nsmcp" } set handle [ns_db gethandle -timeout 2 ${:pool}] if {$handle eq ""} { error "MCP database pool timed out" } try { if {[ns_db dbtype $handle] ne "sqlite"} { error "MCP databasePool must use nsdbsqlite" } set source [ns_db datasource $handle] if {$source eq "" || $source eq ":memory:" || [string match file:* $source]} { error "MCP cache requires a persistent file datasource" } set :path [file normalize $source] file attributes ${:path} -permissions 0600 set db [::nsmcp::DatabaseSession new -handle $handle] } on error {message options} { ns_db releasehandle $handle return -options $options $message } try { set pages [expr {int(${:maxBytes}*0.45)/[$db scalar {PRAGMA page_size}]}] set current [$db scalar {PRAGMA page_count}] if {$current>$pages} { error "existing database exceeds configured byte budget" } $db execute "PRAGMA max_page_count=$pages" return $db } on error {message options} { $db close return -options $options $message } } :public method path {} { # # Return the persistent database path discovered during connection. # # Read the normalized datasource path recorded by the pool adapter. # # @return The normalized database filename. # return ${:path} }XQL Not present: Generic, PostgreSQL, Oracle
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