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Class: Aws::SQS::Queue

Inherits:
Object
  • Object
show all
Defined in:
gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb

Defined Under Namespace

Classes: Collection

Actions collapse

Associations collapse

Read-Only Attributes collapse

Instance Method Summary collapse

Constructor Details

#initialize(url, options = {}) ⇒ Queue #initialize(options = {}) ⇒ Queue

Returns a new instance of Queue

Overloads:

  • #initialize(url, options = {}) ⇒ Queue

    Parameters:

    • url (String)

    Options Hash (options):

  • #initialize(options = {}) ⇒ Queue

    Options Hash (options):

    • :url (required, String)
    • :client (Client)


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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 19

def initialize(*args)
  options = Hash === args.last ? args.pop.dup : {}
  @url = extract_url(args, options)
  @data = options.delete(:data)
  @client = options.delete(:client) || Client.new(options)
end

Instance Method Details

#add_permission(options = {}) ⇒ EmptyStructure

Examples:

Request syntax with placeholder values


queue.add_permission({
  label: "String", # required
  aws_account_ids: ["String"], # required
  actions: ["String"], # required
})

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Options Hash (options):

  • :label (required, String)

    The unique identification of the permission you're setting (for example, AliceSendMessage). Maximum 80 characters. Allowed characters include alphanumeric characters, hyphens (-), and underscores (_).

  • :aws_account_ids (required, Array<String>)

    The AWS account number of the principal who is given permission. The principal must have an AWS account, but does not need to be signed up for Amazon SQS. For information about locating the AWS account identification, see Your AWS Identifiers in the Amazon SQS Developer Guide.

  • :actions (required, Array<String>)

    The action the client wants to allow for the specified principal. The following values are valid:

    • *

    • ChangeMessageVisibility

    • DeleteMessage

    • GetQueueAttributes

    • GetQueueUrl

    • ReceiveMessage

    • SendMessage

    For more information about these actions, see Understanding Permissions in the Amazon SQS Developer Guide.

    Specifying SendMessage, DeleteMessage, or ChangeMessageVisibility for ActionName.n also grants permissions for the corresponding batch versions of those actions: SendMessageBatch, DeleteMessageBatch, and ChangeMessageVisibilityBatch.

Returns:

  • (EmptyStructure)


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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 134

def add_permission(options = {})
  options = options.merge(queue_url: @url)
  resp = @client.add_permission(options)
  resp.data
end

#attributesHash<String,String>

A map of attributes to their respective values.

Returns:

  • (Hash<String,String>)


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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 35

def attributes
  data.attributes
end

#change_message_visibility_batch(options = {}) ⇒ Types::ChangeMessageVisibilityBatchResult

Examples:

Request syntax with placeholder values


queue.change_message_visibility_batch({
  entries: [ # required
    {
      id: "String", # required
      receipt_handle: "String", # required
      visibility_timeout: 1,
    },
  ],
})

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Options Hash (options):

Returns:



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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 156

def change_message_visibility_batch(options = {})
  options = options.merge(queue_url: @url)
  resp = @client.change_message_visibility_batch(options)
  resp.data
end

#clientClient

Returns:



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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 42

def client
  @client
end

#dataTypes::GetQueueAttributesResult

Returns the data for this Aws::SQS::Queue. Calls Client#get_queue_attributes if #data_loaded? is false.

Returns:



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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 65

def data
  load unless @data
  @data
end

#data_loaded?Boolean

Returns true if this resource is loaded. Accessing attributes or #data on an unloaded resource will trigger a call to #load.

Returns:

  • (Boolean)

    Returns true if this resource is loaded. Accessing attributes or #data on an unloaded resource will trigger a call to #load.



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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 73

def data_loaded?
  !!@data
end

#dead_letter_source_queues(options = {}) ⇒ Queue::Collection

Examples:

Request syntax with placeholder values


queue.dead_letter_source_queues()

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Returns:



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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 741

def dead_letter_source_queues(options = {})
  batches = Enumerator.new do |y|
    batch = []
    options = options.merge(queue_url: @url)
    resp = @client.list_dead_letter_source_queues(options)
    resp.data.queue_urls.each do |q|
      batch << Queue.new(
        url: q,
        client: @client
      )
    end
    y.yield(batch)
  end
  Queue::Collection.new(batches)
end

#delete(options = {}) ⇒ EmptyStructure

Examples:

Request syntax with placeholder values


queue.delete()

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Returns:

  • (EmptyStructure)


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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 167

def delete(options = {})
  options = options.merge(queue_url: @url)
  resp = @client.delete_queue(options)
  resp.data
end

#delete_messages(options = {}) ⇒ Types::DeleteMessageBatchResult

Examples:

Request syntax with placeholder values


queue.delete_messages({
  entries: [ # required
    {
      id: "String", # required
      receipt_handle: "String", # required
    },
  ],
})

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Options Hash (options):

Returns:



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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 187

def delete_messages(options = {})
  options = options.merge(queue_url: @url)
  resp = @client.delete_message_batch(options)
  resp.data
end

#loadself Also known as: reload

Loads, or reloads #data for the current Aws::SQS::Queue. Returns self making it possible to chain methods.

queue.reload.data

Returns:

  • (self)


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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 52

def load
  resp = @client.get_queue_attributes(
    queue_url: @url,
    attribute_names: ["All"]
  )
  @data = resp.data
  self
end

#message(receipt_handle) ⇒ Message

Parameters:

  • receipt_handle (String)

Returns:



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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 759

def message(receipt_handle)
  Message.new(
    queue_url: @url,
    receipt_handle: receipt_handle,
    client: @client
  )
end

#purge(options = {}) ⇒ EmptyStructure

Examples:

Request syntax with placeholder values


queue.purge()

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Returns:

  • (EmptyStructure)


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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 198

def purge(options = {})
  options = options.merge(queue_url: @url)
  resp = @client.purge_queue(options)
  resp.data
end

#receive_messages(options = {}) ⇒ Message::Collection

Examples:

Request syntax with placeholder values


message = queue.receive_messages({
  attribute_names: ["All"], # accepts All, Policy, VisibilityTimeout, MaximumMessageSize, MessageRetentionPeriod, ApproximateNumberOfMessages, ApproximateNumberOfMessagesNotVisible, CreatedTimestamp, LastModifiedTimestamp, QueueArn, ApproximateNumberOfMessagesDelayed, DelaySeconds, ReceiveMessageWaitTimeSeconds, RedrivePolicy, FifoQueue, ContentBasedDeduplication, KmsMasterKeyId, KmsDataKeyReusePeriodSeconds
  message_attribute_names: ["MessageAttributeName"],
  max_number_of_messages: 1,
  visibility_timeout: 1,
  wait_time_seconds: 1,
  receive_request_attempt_id: "String",
})

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Options Hash (options):

  • :attribute_names (Array<String>)

    A list of attributes that need to be returned along with each message. These attributes include:

    • All - Returns all values.

    • ApproximateFirstReceiveTimestamp - Returns the time the message was first received from the queue (epoch time in milliseconds).

    • ApproximateReceiveCount - Returns the number of times a message has been received from the queue but not deleted.

    • SenderId

      • For an IAM user, returns the IAM user ID, for example ABCDEFGHI1JKLMNOPQ23R.

      • For an IAM role, returns the IAM role ID, for example ABCDE1F2GH3I4JK5LMNOP:i-a123b456.

    • SentTimestamp - Returns the time the message was sent to the queue (epoch time in milliseconds).

    • MessageDeduplicationId - Returns the value provided by the sender that calls the SendMessage action.

    • MessageGroupId - Returns the value provided by the sender that calls the SendMessage action. Messages with the same MessageGroupId are returned in sequence.

    • SequenceNumber - Returns the value provided by Amazon SQS.

    Any other valid special request parameters (such as the following) are ignored:

    • ApproximateNumberOfMessages

    • ApproximateNumberOfMessagesDelayed

    • ApproximateNumberOfMessagesNotVisible

    • CreatedTimestamp

    • ContentBasedDeduplication

    • DelaySeconds

    • FifoQueue

    • LastModifiedTimestamp

    • MaximumMessageSize

    • MessageRetentionPeriod

    • Policy

    • QueueArn,

    • ReceiveMessageWaitTimeSeconds

    • RedrivePolicy

    • VisibilityTimeout

  • :message_attribute_names (Array<String>)

    The name of the message attribute, where N is the index.

    • The name can contain alphanumeric characters and the underscore (_), hyphen (-), and period (.).

    • The name is case-sensitive and must be unique among all attribute names for the message.

    • The name must not start with AWS-reserved prefixes such as AWS. or Amazon. (or any casing variants).

    • The name must not start or end with a period (.), and it should not have periods in succession (..).

    • The name can be up to 256 characters long.

    When using ReceiveMessage, you can send a list of attribute names to receive, or you can return all of the attributes by specifying All or .* in your request. You can also use all message attributes starting with a prefix, for example bar.*.

  • :max_number_of_messages (Integer)

    The maximum number of messages to return. Amazon SQS never returns more messages than this value (however, fewer messages might be returned). Valid values are 1 to 10. Default is 1.

  • :visibility_timeout (Integer)

    The duration (in seconds) that the received messages are hidden from subsequent retrieve requests after being retrieved by a ReceiveMessage request.

  • :wait_time_seconds (Integer)

    The duration (in seconds) for which the call waits for a message to arrive in the queue before returning. If a message is available, the call returns sooner than WaitTimeSeconds.

  • :receive_request_attempt_id (String)

    This parameter applies only to FIFO (first-in-first-out) queues.

    The token used for deduplication of ReceiveMessage calls. If a networking issue occurs after a ReceiveMessage action, and instead of a response you receive a generic error, you can retry the same action with an identical ReceiveRequestAttemptId to retrieve the same set of messages, even if their visibility timeout has not yet expired.

    • You can use ReceiveRequestAttemptId only for 5 minutes after a ReceiveMessage action.

    • When you set FifoQueue, a caller of the ReceiveMessage action can provide a ReceiveRequestAttemptId explicitly.

    • If a caller of the ReceiveMessage action doesn't provide a ReceiveRequestAttemptId, Amazon SQS generates a ReceiveRequestAttemptId.

    • You can retry the ReceiveMessage action with the same ReceiveRequestAttemptId if none of the messages have been modified (deleted or had their visibility changes).

    • During a visibility timeout, subsequent calls with the same ReceiveRequestAttemptId return the same messages and receipt handles. If a retry occurs within the deduplication interval, it resets the visibility timeout. For more information, see Visibility Timeout in the Amazon Simple Queue Service Developer Guide.

      If a caller of the ReceiveMessage action is still processing messages when the visibility timeout expires and messages become visible, another worker reading from the same queue can receive the same messages and therefore process duplicates. Also, if a reader whose message processing time is longer than the visibility timeout tries to delete the processed messages, the action fails with an error.

      To mitigate this effect, ensure that your application observes a safe threshold before the visibility timeout expires and extend the visibility timeout as necessary.

    • While messages with a particular MessageGroupId are invisible, no more messages belonging to the same MessageGroupId are returned until the visibility timeout expires. You can still receive messages with another MessageGroupId as long as it is also visible.

    • If a caller of ReceiveMessage can't track the ReceiveRequestAttemptId, no retries work until the original visibility timeout expires. As a result, delays might occur but the messages in the queue remain in a strict order.

    The length of ReceiveRequestAttemptId is 128 characters. ReceiveRequestAttemptId can contain alphanumeric characters (a-z, A-Z, 0-9) and punctuation (!"#$%&'()*+,-./:;<=>?@[\]^_`\{|\}~ ).

    For best practices of using ReceiveRequestAttemptId, see Using the ReceiveRequestAttemptId Request Parameter in the Amazon Simple Queue Service Developer Guide.

Returns:



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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 382

def receive_messages(options = {})
  batch = []
  options = options.merge(queue_url: @url)
  resp = @client.receive_message(options)
  resp.data.messages.each do |m|
    batch << Message.new(
      queue_url: @url,
      receipt_handle: m.receipt_handle,
      data: m,
      client: @client
    )
  end
  Message::Collection.new([batch], size: batch.size)
end

#remove_permission(options = {}) ⇒ EmptyStructure

Examples:

Request syntax with placeholder values


queue.remove_permission({
  label: "String", # required
})

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Options Hash (options):

  • :label (required, String)

    The identification of the permission to remove. This is the label added using the AddPermission action.

Returns:

  • (EmptyStructure)


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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 407

def remove_permission(options = {})
  options = options.merge(queue_url: @url)
  resp = @client.remove_permission(options)
  resp.data
end

#send_message(options = {}) ⇒ Types::SendMessageResult

Examples:

Request syntax with placeholder values


queue.send_message({
  message_body: "String", # required
  delay_seconds: 1,
  message_attributes: {
    "String" => {
      string_value: "String",
      binary_value: "data",
      string_list_values: ["String"],
      binary_list_values: ["data"],
      data_type: "String", # required
    },
  },
  message_deduplication_id: "String",
  message_group_id: "String",
})

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Options Hash (options):

  • :message_body (required, String)

    The message to send. The maximum string size is 256 KB.

    A message can include only XML, JSON, and unformatted text. The following Unicode characters are allowed:

    #x9 | #xA | #xD | #x20 to #xD7FF | #xE000 to #xFFFD | #x10000 to #x10FFFF

    Any characters not included in this list will be rejected. For more information, see the W3C specification for characters.

  • :delay_seconds (Integer)

    The length of time, in seconds, for which to delay a specific message. Valid values: 0 to 900. Maximum: 15 minutes. Messages with a positive DelaySeconds value become available for processing after the delay period is finished. If you don't specify a value, the default value for the queue applies.

    When you set FifoQueue, you can't set DelaySeconds per message. You can set this parameter only on a queue level.

  • :message_attributes (Hash<String,Types::MessageAttributeValue>)

    Each message attribute consists of a Name, Type, and Value. For more information, see Message Attribute Items and Validation in the Amazon SQS Developer Guide.

  • :message_deduplication_id (String)

    This parameter applies only to FIFO (first-in-first-out) queues.

    The token used for deduplication of sent messages. If a message with a particular MessageDeduplicationId is sent successfully, any messages sent with the same MessageDeduplicationId are accepted successfully but aren't delivered during the 5-minute deduplication interval. For more information, see Exactly-Once Processing in the Amazon SQS Developer Guide.

    • Every message must have a unique MessageDeduplicationId,

      • You may provide a MessageDeduplicationId explicitly.

      • If you aren't able to provide a MessageDeduplicationId and you enable ContentBasedDeduplication for your queue, Amazon SQS uses a SHA-256 hash to generate the MessageDeduplicationId using the body of the message (but not the attributes of the message).

      • If you don't provide a MessageDeduplicationId and the queue doesn't have ContentBasedDeduplication set, the action fails with an error.

      • If the queue has ContentBasedDeduplication set, your MessageDeduplicationId overrides the generated one.

    • When ContentBasedDeduplication is in effect, messages with identical content sent within the deduplication interval are treated as duplicates and only one copy of the message is delivered.

    • If you send one message with ContentBasedDeduplication enabled and then another message with a MessageDeduplicationId that is the same as the one generated for the first MessageDeduplicationId, the two messages are treated as duplicates and only one copy of the message is delivered.

    The MessageDeduplicationId is available to the recipient of the message (this can be useful for troubleshooting delivery issues).

    If a message is sent successfully but the acknowledgement is lost and the message is resent with the same MessageDeduplicationId after the deduplication interval, Amazon SQS can't detect duplicate messages.

    The length of MessageDeduplicationId is 128 characters. MessageDeduplicationId can contain alphanumeric characters (a-z, A-Z, 0-9) and punctuation (!"#$%&'()*+,-./:;<=>?@[\]^_`\{|\}~ ).

    For best practices of using MessageDeduplicationId, see Using the MessageDeduplicationId Property in the Amazon Simple Queue Service Developer Guide.

  • :message_group_id (String)

    This parameter applies only to FIFO (first-in-first-out) queues.

    The tag that specifies that a message belongs to a specific message group. Messages that belong to the same message group are processed in a FIFO manner (however, messages in different message groups might be processed out of order). To interleave multiple ordered streams within a single queue, use MessageGroupId values (for example, session data for multiple users). In this scenario, multiple readers can process the queue, but the session data of each user is processed in a FIFO fashion.

    • You must associate a non-empty MessageGroupId with a message. If you don't provide a MessageGroupId, the action fails.

    • ReceiveMessage might return messages with multiple MessageGroupId values. For each MessageGroupId, the messages are sorted by time sent. The caller can't specify a MessageGroupId.

    The length of MessageGroupId is 128 characters. Valid values are alphanumeric characters and punctuation (!"#$%&'()*+,-./:;<=>?@[\]^_`\{|\}~).

    For best practices of using MessageGroupId, see Using the MessageGroupId Property in the Amazon Simple Queue Service Developer Guide.

    MessageGroupId is required for FIFO queues. You can't use it for Standard queues.

Returns:



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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 557

def send_message(options = {})
  options = options.merge(queue_url: @url)
  resp = @client.send_message(options)
  resp.data
end

#send_messages(options = {}) ⇒ Types::SendMessageBatchResult

Examples:

Request syntax with placeholder values


queue.send_messages({
  entries: [ # required
    {
      id: "String", # required
      message_body: "String", # required
      delay_seconds: 1,
      message_attributes: {
        "String" => {
          string_value: "String",
          binary_value: "data",
          string_list_values: ["String"],
          binary_list_values: ["data"],
          data_type: "String", # required
        },
      },
      message_deduplication_id: "String",
      message_group_id: "String",
    },
  ],
})

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Options Hash (options):

Returns:



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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 589

def send_messages(options = {})
  options = options.merge(queue_url: @url)
  resp = @client.send_message_batch(options)
  resp.data
end

#set_attributes(options = {}) ⇒ EmptyStructure

Examples:

Request syntax with placeholder values


queue.set_attributes({
  attributes: { # required
    "All" => "String",
  },
})

Parameters:

  • options (Hash) (defaults to: {})

    ({})

Options Hash (options):

  • :attributes (required, Hash<String,String>)

    A map of attributes to set.

    The following lists the names, descriptions, and values of the special request parameters that the SetQueueAttributes action uses:

    • DelaySeconds - The length of time, in seconds, for which the delivery of all messages in the queue is delayed. Valid values: An integer from 0 to 900 (15 minutes). The default is 0 (zero).

    • MaximumMessageSize - The limit of how many bytes a message can contain before Amazon SQS rejects it. Valid values: An integer from 1,024 bytes (1 KiB) up to 262,144 bytes (256 KiB). The default is 262,144 (256 KiB).

    • MessageRetentionPeriod - The length of time, in seconds, for which Amazon SQS retains a message. Valid values: An integer representing seconds, from 60 (1 minute) to 1,209,600 (14 days). The default is 345,600 (4 days).

    • Policy - The queue's policy. A valid AWS policy. For more information about policy structure, see Overview of AWS IAM Policies in the Amazon IAM User Guide.

    • ReceiveMessageWaitTimeSeconds - The length of time, in seconds, for which a ReceiveMessage action waits for a message to arrive. Valid values: an integer from 0 to 20 (seconds). The default is 0.

    • RedrivePolicy - The parameters for the dead letter queue functionality of the source queue. For more information about the redrive policy and dead letter queues, see Using Amazon SQS Dead Letter Queues in the Amazon SQS Developer Guide.

      The dead letter queue of a FIFO queue must also be a FIFO queue. Similarly, the dead letter queue of a standard queue must also be a standard queue.

    • VisibilityTimeout - The visibility timeout for the queue. Valid values: an integer from 0 to 43,200 (12 hours). The default is 30. For more information about the visibility timeout, see Visibility Timeout in the Amazon SQS Developer Guide.

    The following attributes apply only to server-side-encryption:

    • KmsMasterKeyId - The ID of an AWS-managed customer master key (CMK) for Amazon SQS or a custom CMK. For more information, see Key Terms. While the alias of the AWS-managed CMK for Amazon SQS is always alias/aws/sqs, the alias of a custom CMK can, for example, be alias/aws/sqs. For more examples, see KeyId in the AWS Key Management Service API Reference.

    • KmsDataKeyReusePeriodSeconds - The length of time, in seconds, for which Amazon SQS can reuse a data key to encrypt or decrypt messages before calling AWS KMS again. An integer representing seconds, between 60 seconds (1 minute) and 86,400 seconds (24 hours). The default is 300 (5 minutes). A shorter time period provides better security but results in more calls to KMS which incur charges after Free Tier. For more information, see How Does the Data Key Reuse Period Work?.

    The following attribute applies only to FIFO (first-in-first-out) queues:

    • ContentBasedDeduplication - Enables content-based deduplication. For more information, see Exactly-Once Processing in the Amazon SQS Developer Guide.

      • Every message must have a unique MessageDeduplicationId,

        • You may provide a MessageDeduplicationId explicitly.

        • If you aren't able to provide a MessageDeduplicationId and you enable ContentBasedDeduplication for your queue, Amazon SQS uses a SHA-256 hash to generate the MessageDeduplicationId using the body of the message (but not the attributes of the message).

        • If you don't provide a MessageDeduplicationId and the queue doesn't have ContentBasedDeduplication set, the action fails with an error.

        • If the queue has ContentBasedDeduplication set, your MessageDeduplicationId overrides the generated one.

      • When ContentBasedDeduplication is in effect, messages with identical content sent within the deduplication interval are treated as duplicates and only one copy of the message is delivered.

      • If you send one message with ContentBasedDeduplication enabled and then another message with a MessageDeduplicationId that is the same as the one generated for the first MessageDeduplicationId, the two messages are treated as duplicates and only one copy of the message is delivered.

    Any other valid special request parameters (such as the following) are ignored:

    • ApproximateNumberOfMessages

    • ApproximateNumberOfMessagesDelayed

    • ApproximateNumberOfMessagesNotVisible

    • CreatedTimestamp

    • LastModifiedTimestamp

    • QueueArn

Returns:

  • (EmptyStructure)


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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 728

def set_attributes(options = {})
  options = options.merge(queue_url: @url)
  resp = @client.set_queue_attributes(options)
  resp.data
end

#urlString

Returns:

  • (String)


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# File 'gems/aws-sdk-sqs/lib/aws-sdk-sqs/queue.rb', line 29

def url
  @url
end