const class concurrent::ConcurrentMap

sys::Obj
  concurrent::ConcurrentMap

@Js

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ConcurrentMap is a Fantom wrapper around Java's ConcurrentHashMap. It provides high performance concurrency and allows many operations to be performed without locking. Refer to the ConcurrentHashMap Javadoc for the detailed semanatics on behavior and performance.

add

Void add(Obj key, Obj val)

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Add a value by key, raise exception if key was already mapped

clear

Void clear()

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Remove all the key/value pairs

containsKey

Bool containsKey(Obj key)

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Return true if the specified key is mapped

each

Void each(|Obj,Obj| f)

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Iterate the map's key value pairs

eachWhile

Obj? eachWhile(|Obj,Obj->Obj?| f)

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Iterate the map's key value pairs until given function returns non-null and return that as the result of this method. Otherwise itereate every pair and return null

get

@Operator
Obj? get(Obj key)

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Get a value by its key or return null

getAndSet

Obj? getAndSet(Obj key, Obj val)

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Set a value by key and return old value. Return the old value mapped by the key or null if it is not currently mapped.

getOrAdd

Obj getOrAdd(Obj key, Obj defVal)

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Get the value for the specified key, or if it doesn't exist then automatically add it with the given default value.

isEmpty

Bool isEmpty()

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Return if size is zero (this is expensive and requires full segment traveral)

keys

Obj[] keys(Type of)

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Return list of keys

make

new make(Int initialCapacity := 256)

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Make with initial capacity

remove

Obj? remove(Obj key)

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Remove a value by key, ignore if key not mapped

set

@Operator
Void set(Obj key, Obj val)

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Set a value by key

setAll

This setAll(Map m)

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Append the specified map to this map be setting every key/value from m in this map. Keys in m not yet mapped are added and keys already mapped are overwritten. Return this.

size

Int size()

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Return size (this is expensive and requires full segment traveral)

vals

Obj[] vals(Type of)

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Return list of values