QueueAttributesManager (AWS Java SDK :: Services :: Amazon SQS 2.29.0 API)

java.lang.Object
- software.amazon.awssdk.services.sqs.internal.batchmanager.QueueAttributesManager

```
public final class QueueAttributesManager
extends Object
```
The QueueAttributesManager class is responsible for managing and retrieving specific attributes of an AWS SQS queue, such as message wait time and visibility timeout. It efficiently caches these attributes to minimize redundant API calls to SQS, ensuring that the attributes are fetched only once and reused in subsequent requests.
This class uses an AtomicReference to maintain the state of the attribute map, allowing concurrent access and handling cases where the fetching of attributes may fail. If an error occurs during the retrieval of attributes, the state is reset to allow for a fresh attempt in subsequent calls.

The class provides methods to get the visibility timeout and calculate the message receive timeout, which are asynchronously retrieved and processed using CompletableFuture. These methods handle cancellation scenarios by cancelling the SQS request if the calling future is cancelled.

This class is intended for internal use and is marked with the SdkInternalApi annotation.

Constructor Summary

Constructors
Constructor Description

QueueAttributesManager(SqsAsyncClient sqsClient, String queueUrl)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`CompletableFuture<Duration>`	`getReceiveMessageTimeout(ReceiveMessageRequest rq, Duration configuredWaitTime)`	Retrieves the received message timeout based on the provided request and queue attributes.
`CompletableFuture<Duration>`	`getVisibilityTimeout()`	Retrieves the visibility timeout for the queue.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - QueueAttributesManager
```
public QueueAttributesManager(SqsAsyncClient sqsClient,
                              String queueUrl)
```
- Method Detail
  - getReceiveMessageTimeout
```
public CompletableFuture<Duration> getReceiveMessageTimeout(ReceiveMessageRequest rq,
                                                            Duration configuredWaitTime)
```
    Retrieves the received message timeout based on the provided request and queue attributes.
    
    Parameters:
    
    rq - The receive message request
    
    configuredWaitTime - The configured minimum wait time
    
    Returns:
    
    CompletableFuture with the calculated receive message timeout in milliseconds
  - getVisibilityTimeout
```
public CompletableFuture<Duration> getVisibilityTimeout()
```
    Retrieves the visibility timeout for the queue.
    
    Returns:
    
    CompletableFuture with the visibility timeout in nanoseconds