const classafConcurrent::SynchronizedFileMap

sys::Obj
  afConcurrent::SynchronizedFileMap

A SynchronisedMap, keyed on File, that updates its contents if the file is updated. Use as a cache based on the content of the file, see getOrAddOrUpdate().

Note that all objects held in the map have to be immutable.

clear

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This clear()

Remove all key/value pairs from the map. Return this.

containsKey

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Bool containsKey(File key)

Returns true if the map contains the given file

def

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const Obj? def := null

The default value to use for get when a key isn't mapped.

get

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@Operator Obj? get(Obj key, Obj? def := this.def)

Returns the value associated with the given key. If key is not mapped, then return the value of the def parameter. If def is omitted it defaults to null.

getOrAdd

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Obj? getOrAdd(File key, |File->Obj? valFunc)

Returns the value associated with the given key. If it doesn't exist then it is added from the value function.

getOrAddOrUpdate

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Obj? getOrAddOrUpdate(File key, |File->Obj? valFunc)

Returns the value associated with the given file. If it doesn't exist, or the file has been updated since the last get, then it is added from the given value function.

Set timeout in the ctor to avoid hitting the file system on every call to this method.

isEmpty

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Bool isEmpty()

Return true if size() == 0

isModified

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Bool isModified(File key)

Returns true if a subsequent call to getOrAddOrUpdate() would result in the valFunc being executed. This method does not modify any state and returns true if the file has not been added to the map.

keys

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Obj[] keys()

Returns a list of all the mapped keys.

make

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new make(ActorPool actorPool, Duration? timeout := 30sec, |This? f := null)

Creates a SynchronizedMap with the given ActorPool.

timeout is how long to wait between individual file checks. Use to avoid excessive reads of the file system. Set to null to check the file every time.

map