Class: QgsAbstractContentCacheEntry

Base class for entries in a QgsAbstractContentCache.

Subclasses must take care to correctly implement the isEqual() method, applying their own logic for testing extra cache properties (e.g. image size for an image-based cache).

Added in version 3.6.

Note

This is an abstract class, with methods which must be implemented by a subclass.

The following methods must be implemented: dataSize(), dump(), isEqual()

Abstract Methods

dataSize	Returns the memory usage in bytes for the entry.
dump	Dumps debugging strings containing the item's properties.
isEqual	Tests whether this entry matches another entry.

Attributes

fileModified	Timestamp when file was last modified
fileModifiedLastCheckTimer	Time since last check of file modified date
mFileModifiedCheckTimeout	Timeout before re-checking whether the file modified date has changed.
nextEntry	Entries are kept on a linked list, sorted by last access.
path	Represents the absolute path to a file, a remote URL, or a base64 encoded string.
previousEntry	Entries are kept on a linked list, sorted by last access.

class qgis.core.QgsAbstractContentCacheEntry

Bases: object

__init__(path: str | None)

Constructor for QgsAbstractContentCacheEntry for an entry relating to the specified path.

Parameters:

path (Optional[str])

abstract dataSize(self) → int

Returns the memory usage in bytes for the entry.

Return type:

int

abstract dump(self)

Dumps debugging strings containing the item’s properties. For testing purposes only.

fileModified: QDateTime

Timestamp when file was last modified

fileModifiedLastCheckTimer: QElapsedTimer

Time since last check of file modified date

abstract isEqual(self, other: QgsAbstractContentCacheEntry | None) → bool

Tests whether this entry matches another entry. Subclasses must take care to check that the type of other is of a matching class, and then test extra cache-specific properties, such as image size.

Parameters:

other (Optional[QgsAbstractContentCacheEntry])

Return type:

bool

mFileModifiedCheckTimeout: int

Timeout before re-checking whether the file modified date has changed.

nextEntry: QgsAbstractContentCacheEntry

Entries are kept on a linked list, sorted by last access. This point refers to the next entry in the cache.

path: str

Represents the absolute path to a file, a remote URL, or a base64 encoded string.

previousEntry: QgsAbstractContentCacheEntry

Entries are kept on a linked list, sorted by last access. This point refers to the previous entry in the cache.