AtomicLong

class AtomicLong(client, service_name, name)

Bases: hazelcast.proxy.base.PartitionSpecificProxy

AtomicLong is a redundant and highly available distributed long value which can be updated atomically.

add_and_get(delta)

Atomically adds the given delta value to the currently stored value.

Parameters

delta – (long), the value to add to the currently stored value.

Returns

(long), the updated value.

alter(function)

Alters the currently stored value by applying a function on it.

Parameters

function – (Function), A stateful serializable object which represents the Function defined on server side. This object must have a serializable Function counter part registered on server side with the actual org.hazelcast.core.IFunction implementation.

alter_and_get(function)

Alters the currently stored value by applying a function on it and gets the result.

Parameters

function – (Function), A stateful serializable object which represents the Function defined on server side. This object must have a serializable Function counter part registered on server side with the actual org.hazelcast.core.IFunction implementation.

Returns

(long), the new value.

apply(function)

Applies a function on the value, the actual stored value will not change.

Parameters

function – (Function), A stateful serializable object which represents the Function defined on server side. This object must have a serializable Function counter part registered on server side with the actual org.hazelcast.core.IFunction implementation.

Returns

(object), the result of the function application.

compare_and_set(expected, updated)

Atomically sets the value to the given updated value only if the current value == the expected value.

Parameters

• expected – (long), the expected value.

• updated – (long), the new value.

Returns

(bool), true if successful; or false if the actual value was not equal to the expected value.

decrement_and_get()

Atomically decrements the current value by one.

Returns

(long), the updated value, the current value decremented by one.

get()

Gets the current value.

Returns

(long), gets the current value.

get_and_add(delta)

Atomically adds the given value to the current value.

Parameters

delta – (long), the value to add to the current value.

Returns

(long), the old value before the addition.

get_and_alter(function)

Alters the currently stored value by applying a function on it on and gets the old value.

Parameters

function – (Function), A stateful serializable object which represents the Function defined on server side. This object must have a serializable Function counter part registered on server side with the actual org.hazelcast.core.IFunction implementation.

Returns

(long), the old value.

get_and_set(new_value)

Atomically sets the given value and returns the old value.

Parameters

new_value – (long), the new value.

Returns

(long), the old value.

increment_and_get()

Atomically increments the current value by one.

Returns

(long), the updated value, the current value incremented by one.

get_and_increment()

Atomically increments the current value by one.

Returns

(long), the old value.

set(new_value)

Atomically sets the given value.

Parameters

new_value – (long), the new value.