import boto3
# boto3 connect
sqs = boto3.resource(
'sqs',
region_name=AWS_REGION_NAME,
aws_access_key_id=AWS_ACESS_KEY_ID,
aws_secret_access_key=AWS_SECRET_ACESS_KEY)In the above code, we are connecting to a sqs resource in a given region, access key id, secret key using boto3.
queue = sqs.create_queue(QueueName='testqueue', Attributes={'DelaySeconds': '5'})We should give queue name, can also give other attributes such as delay seconds(number of seconds to wait before an item may be processed), ApproximateNumberOfMessages, MaximumMessageSize.
It returns unique queue url though which we can access queue and its messages
After connecting to a service, we are connecting a SQS Queue by giving queue name with get_queue_by_name method.
queue = sqs.get_queue_by_name(QueueName=AWS_QUEUE_NAME)In SQS, we can create single, bulk messages in a queue using send_message and send_messages command.
response = queue.send_message(
QueueUrl=url,
MessageBody='message1',
MessageAttributes={
'Type': {
'name': 'String'
}
)
print responseIt returns a message id, message body for generated message. We can alse user defined attrubutes to a individual message.
response = queue.send_messages(Entries=[{
QueueUrl=url,
MessageBody='message1',
MessageAttributes={
'Type': {
'length': '09'
},
{QueueUrl=url,
MessageBody='message2',
MessageAttributes={
'Size': {
'size': '20'
}]
)
print responseResponse will contain all successful message and failed messages information in a queue.
message = queue.receive_messages()[0]
message = queue.receive_messages(MessageAttributeNames=['Type'])[0]sqs message will be processed in batches, we can retrieve all messages or filter particular messages based on attribute types in a queue. We will get the message information in an xml format. We can convert it to json using xmltodict package. Here you can find relevant information to process information.
response = client.delete_message(
QueueUrl=url,
ReceiptHandle=MESSAGE_ID
)response = queue.delete_messages(
Entries=[
{
'Id': MESSAGE_ID,
'ReceiptHandle': MESSAGE_BODY
},
]
)Here we give the queue url, message id for the message to be deleted.
response = client.delete_queue(
QueueUrl=url
)When you delete a queue, you must wait at least 60 seconds to delete the queue and creating a queue with the same name.