HashDBM class - libddbm library

Constructors

HashDBM(RandomAccessFile file, {int buckets = 10007, bool flush = true, bool crc = false, bool readonly = false, bool versioned = false}): Open a new database. Optional parameters are: buckets which sets the number of hash buckets to use, flush which when set to true will force data to disk every time it is changed, crc which will enable CRC checks on underlying records if set to true, and readonly which opens the database with a shared lock and prevents mutations. The defaults are generally good enough.

Properties

batch ↔ bool: Suppress per-operation flushing for bulk operations.
getter/setter pair
file → RandomAccessFile: Get the underlying file
no setter
hashCode → int: The hash code for this object.
no setterinherited
hashTableSize → int: Get the number of buckets in the hash table.
no setter
header → HashHeader: Get the header (for versioned overlay access).
no setter
pool → MemoryPool: Get the memory pool (for versioned overlay access).
no setter
readonly → bool: Whether this database is opened in readonly mode
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

clear() → void: Erases all data and resets the internal structure, but does not reclaim storage.
override
close() → void: flush() and close the underlying file.
override
compact() → int: Truncate trailing free blocks at end-of-file and return bytes reclaimed.
override
count() → int: Get the number of records stored in the database as a Uint64
override
entries() → Iterator<MapEntry<Uint8List, Uint8List>>: Iterate over all keys and values in the database
override
flush() → void: Flush all data to external storage.
override
get(Uint8List key) → Uint8List?: Get a value from the database using key, or else return null
override
modified() → DateTime: Get the last time the database was opened or modified.
override
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
put(Uint8List key, Uint8List value) → Uint8List?: Add a key, value pair to the underlying store, overwriting any existing values. Returns the old value if one existed, otherwise returns the new value.
override
putIfAbsent(Uint8List key, Uint8List value) → Uint8List: Add a key, value pair to the underlying store if not key is in the underlying store. Returns the old value if key existed, otherwise value is returned.
override
remove(Uint8List key) → Uint8List?: Remove a value from the database using key. If the key had an associated value, return the value or else return null
override
size() → int: Get the size, in bytes, of data stored. This is intended to track approximate data size and will differ from the size of the file itself.
override
toString() → String: A string representation of this object.
inherited
version() → int: Get the version of the underlying implementation as a 32bit integer.
override

Operators

operator ==(Object other) → bool: The equality operator.
inherited

Static Properties

VERSION → int: Version of the database
final