![]() If optional args block is true and timeout is put ( item, block = True, timeout = None ) ¶ Guarantee that a subsequent call to put() will not block. Similarly, if full() returns False it doesn’t Returns True it doesn’t guarantee that a subsequent call to get() Return True if the queue is full, False otherwise. Guarantee that a subsequent call to get() will not block. Similarly, if empty() returns False it doesn’t Returns True it doesn’t guarantee that a subsequent call to put() Return True if the queue is empty, False otherwise. Guarantee that a subsequent get() will not block, nor will qsize() < maxsize Return the approximate size of the queue. Provide the public methods described below. Queue objects ( Queue, LifoQueue, or PriorityQueue) Full ¶Įxception raised when non-blocking put() (or Empty ¶Įxception raised when non-blocking get() (or That ignores the data item and only compares the priority number: If the data elements are not comparable, the data can be wrapped in a class A typical pattern forĮntries is a tuple in the form: (priority_number, data). One that would be returned by min(entries)). The lowest valued entries are retrieved first (the lowest valued entry is the Maxsize is less than or equal to zero, the queue size is infinite. maxsize is an integer that sets the upperbound PriorityQueue ( maxsize = 0 ) ¶Ĭonstructor for a priority queue. Insertion willīlock once this size has been reached, until queue items are consumed. ![]() Limit on the number of items that can be placed in the queue. The queue module defines the following classes and exceptions: class queue. In exchange for the smaller functionality. Specific implementation provides additional guarantees In addition, the module implements a “simple” Internally, those three types of queues use locks to temporarily blockĬompeting threads however, they are not designed to handle reentrancy The entries are kept sorted (using the heapq module) and the The first retrieved (operating like a stack). LIFO queue, the most recently added entry is Queue, the first tasks added are the first retrieved. The module implements three types of queue, which differ only in the order in Module implements all the required locking semantics. It is especially useful in threaded programming when information must beĮxchanged safely between multiple threads. The queue module implements multi-producer, multi-consumer queues. Queue determination criteria and access sequences in Customizing for Extended Warehouse Management → Cross-Process Settings → Resource Management → Define Queues. The queue determination table is read again, according to the next entry in ![]() Is performed in accordance with the access sequence, with the initial searchīeing for an entry with all of these parameter values. System creates a WT, it searches for an appropriate queue to assign to it, The warehouse management monitor ( Assign Queue/Unassign Queue methods) Maintain Queue Sequence for Resource Group ), or from Resource group transaction, accessed on the SAP Easy Access screen ( Extended Warehouse Management → Master Resource method).Īssign/unassign a resource group to/from a queue using the queue sequence for Resource to a queue using the resource maintenance transaction, accessed onĪccess screen ( Extended Warehouse Management → Master Data → Resource Management → /SCWM/RSRC Queue, according to the resource group’s queue sequence. To the resource’s assigned queue, and, in the absence of an assigned ![]() WO selection will be performed first according Operating environment of a resource is determined when the resource logs on to the RFĪssign a resource to a specific queue, or assign its resource group toĪ sequence of allowed queues. In addition, a resource working within a particular operating environment mayĮxecute only those WOs that belong to a queue in the same operatingĭetermine the operating environment of a queue during queue definitionĬross-Process Settings → Resource Management → Define Queues). Resource group is assigned, and in which the resource is authorized to work. This means a queue to which the resource or May execute only those WOs that belong to one of its allowed queues (unless Management and distribution of work in the warehouse is accomplished by the Queues define movements by which work in the warehouse is managed and Logical file to which warehouse tasks (WTs) for processing are assigned.
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