Lambda / Client / list_event_source_mappings

list_event_source_mappings

Lambda.Client.list_event_source_mappings(**kwargs)

Lists event source mappings. Specify an EventSourceArn to show only event source mappings for a single event source.

See also: AWS API Documentation

Request Syntax

response = client.list_event_source_mappings(
    EventSourceArn='string',
    FunctionName='string',
    Marker='string',
    MaxItems=123
)

Parameters:

• EventSourceArn (string) –

  The Amazon Resource Name (ARN) of the event source.

  • Amazon Kinesis – The ARN of the data stream or a stream consumer.

  • Amazon DynamoDB Streams – The ARN of the stream.

  • Amazon Simple Queue Service – The ARN of the queue.

  • Amazon Managed Streaming for Apache Kafka – The ARN of the cluster.

  • Amazon MQ – The ARN of the broker.

• FunctionName (string) –

  The name of the Lambda function.

  Name formats

  • Function name – MyFunction.

  • Function ARN – arn:aws:lambda:us-west-2:123456789012:function:MyFunction.

  • Version or Alias ARN – arn:aws:lambda:us-west-2:123456789012:function:MyFunction:PROD.

  • Partial ARN – 123456789012:function:MyFunction.

  The length constraint applies only to the full ARN. If you specify only the function name, it’s limited to 64 characters in length.

• Marker (string) – A pagination token returned by a previous call.

• MaxItems (integer) – The maximum number of event source mappings to return. Note that ListEventSourceMappings returns a maximum of 100 items in each response, even if you set the number higher.

Return type:

dict

Returns:

Response Syntax

{
    'NextMarker': 'string',
    'EventSourceMappings': [
        {
            'UUID': 'string',
            'StartingPosition': 'TRIM_HORIZON'|'LATEST'|'AT_TIMESTAMP',
            'StartingPositionTimestamp': datetime(2015, 1, 1),
            'BatchSize': 123,
            'MaximumBatchingWindowInSeconds': 123,
            'ParallelizationFactor': 123,
            'EventSourceArn': 'string',
            'FilterCriteria': {
                'Filters': [
                    {
                        'Pattern': 'string'
                    },
                ]
            },
            'FunctionArn': 'string',
            'LastModified': datetime(2015, 1, 1),
            'LastProcessingResult': 'string',
            'State': 'string',
            'StateTransitionReason': 'string',
            'DestinationConfig': {
                'OnSuccess': {
                    'Destination': 'string'
                },
                'OnFailure': {
                    'Destination': 'string'
                }
            },
            'Topics': [
                'string',
            ],
            'Queues': [
                'string',
            ],
            'SourceAccessConfigurations': [
                {
                    'Type': 'BASIC_AUTH'|'VPC_SUBNET'|'VPC_SECURITY_GROUP'|'SASL_SCRAM_512_AUTH'|'SASL_SCRAM_256_AUTH'|'VIRTUAL_HOST'|'CLIENT_CERTIFICATE_TLS_AUTH'|'SERVER_ROOT_CA_CERTIFICATE',
                    'URI': 'string'
                },
            ],
            'SelfManagedEventSource': {
                'Endpoints': {
                    'string': [
                        'string',
                    ]
                }
            },
            'MaximumRecordAgeInSeconds': 123,
            'BisectBatchOnFunctionError': True|False,
            'MaximumRetryAttempts': 123,
            'TumblingWindowInSeconds': 123,
            'FunctionResponseTypes': [
                'ReportBatchItemFailures',
            ],
            'AmazonManagedKafkaEventSourceConfig': {
                'ConsumerGroupId': 'string'
            },
            'SelfManagedKafkaEventSourceConfig': {
                'ConsumerGroupId': 'string'
            },
            'ScalingConfig': {
                'MaximumConcurrency': 123
            },
            'DocumentDBEventSourceConfig': {
                'DatabaseName': 'string',
                'CollectionName': 'string',
                'FullDocument': 'UpdateLookup'|'Default'
            }
        },
    ]
}

Response Structure

• (dict) –

  • NextMarker (string) –

    A pagination token that’s returned when the response doesn’t contain all event source mappings.

  • EventSourceMappings (list) –

    A list of event source mappings.

    • (dict) –

      A mapping between an Amazon Web Services resource and a Lambda function. For details, see CreateEventSourceMapping.

      • UUID (string) –

        The identifier of the event source mapping.

      • StartingPosition (string) –

        The position in a stream from which to start reading. Required for Amazon Kinesis, Amazon DynamoDB, and Amazon MSK stream sources. AT_TIMESTAMP is supported only for Amazon Kinesis streams.

      • StartingPositionTimestamp (datetime) –

        With StartingPosition set to AT_TIMESTAMP, the time from which to start reading.

      • BatchSize (integer) –

        The maximum number of records in each batch that Lambda pulls from your stream or queue and sends to your function. Lambda passes all of the records in the batch to the function in a single call, up to the payload limit for synchronous invocation (6 MB).

        Default value: Varies by service. For Amazon SQS, the default is 10. For all other services, the default is 100.

        Related setting: When you set BatchSize to a value greater than 10, you must set MaximumBatchingWindowInSeconds to at least 1.

      • MaximumBatchingWindowInSeconds (integer) –

        The maximum amount of time, in seconds, that Lambda spends gathering records before invoking the function. You can configure MaximumBatchingWindowInSeconds to any value from 0 seconds to 300 seconds in increments of seconds.

        For streams and Amazon SQS event sources, the default batching window is 0 seconds. For Amazon MSK, Self-managed Apache Kafka, and Amazon MQ event sources, the default batching window is 500 ms. Note that because you can only change MaximumBatchingWindowInSeconds in increments of seconds, you cannot revert back to the 500 ms default batching window after you have changed it. To restore the default batching window, you must create a new event source mapping.

        Related setting: For streams and Amazon SQS event sources, when you set BatchSize to a value greater than 10, you must set MaximumBatchingWindowInSeconds to at least 1.

      • ParallelizationFactor (integer) –

        (Streams only) The number of batches to process concurrently from each shard. The default value is 1.

      • EventSourceArn (string) –

        The Amazon Resource Name (ARN) of the event source.

      • FilterCriteria (dict) –

        An object that defines the filter criteria that determine whether Lambda should process an event. For more information, see Lambda event filtering.

        • Filters (list) –

          A list of filters.

          • (dict) –

            A structure within a FilterCriteria object that defines an event filtering pattern.

            • Pattern (string) –

              A filter pattern. For more information on the syntax of a filter pattern, see Filter rule syntax.

      • FunctionArn (string) –

        The ARN of the Lambda function.

      • LastModified (datetime) –

        The date that the event source mapping was last updated or that its state changed.

      • LastProcessingResult (string) –

        The result of the last Lambda invocation of your function.

      • State (string) –

        The state of the event source mapping. It can be one of the following: Creating, Enabling, Enabled, Disabling, Disabled, Updating, or Deleting.

      • StateTransitionReason (string) –

        Indicates whether a user or Lambda made the last change to the event source mapping.

      • DestinationConfig (dict) –

        (Streams only) An Amazon SQS queue or Amazon SNS topic destination for discarded records.

        • OnSuccess (dict) –

          The destination configuration for successful invocations.

          • Destination (string) –

            The Amazon Resource Name (ARN) of the destination resource.

        • OnFailure (dict) –

          The destination configuration for failed invocations.

          • Destination (string) –

            The Amazon Resource Name (ARN) of the destination resource.

      • Topics (list) –

        The name of the Kafka topic.

        • (string) –

      • Queues (list) –

        (Amazon MQ) The name of the Amazon MQ broker destination queue to consume.

        • (string) –

      • SourceAccessConfigurations (list) –

        An array of the authentication protocol, VPC components, or virtual host to secure and define your event source.

        • (dict) –

          To secure and define access to your event source, you can specify the authentication protocol, VPC components, or virtual host.

          • Type (string) –

            The type of authentication protocol, VPC components, or virtual host for your event source. For example: "Type":"SASL_SCRAM_512_AUTH".

            • BASIC_AUTH – (Amazon MQ) The Secrets Manager secret that stores your broker credentials.

            • BASIC_AUTH – (Self-managed Apache Kafka) The Secrets Manager ARN of your secret key used for SASL/PLAIN authentication of your Apache Kafka brokers.

            • VPC_SUBNET – (Self-managed Apache Kafka) The subnets associated with your VPC. Lambda connects to these subnets to fetch data from your self-managed Apache Kafka cluster.

            • VPC_SECURITY_GROUP – (Self-managed Apache Kafka) The VPC security group used to manage access to your self-managed Apache Kafka brokers.

            • SASL_SCRAM_256_AUTH – (Self-managed Apache Kafka) The Secrets Manager ARN of your secret key used for SASL SCRAM-256 authentication of your self-managed Apache Kafka brokers.

            • SASL_SCRAM_512_AUTH – (Amazon MSK, Self-managed Apache Kafka) The Secrets Manager ARN of your secret key used for SASL SCRAM-512 authentication of your self-managed Apache Kafka brokers.

            • VIRTUAL_HOST –- (RabbitMQ) The name of the virtual host in your RabbitMQ broker. Lambda uses this RabbitMQ host as the event source. This property cannot be specified in an UpdateEventSourceMapping API call.

            • CLIENT_CERTIFICATE_TLS_AUTH – (Amazon MSK, self-managed Apache Kafka) The Secrets Manager ARN of your secret key containing the certificate chain (X.509 PEM), private key (PKCS#8 PEM), and private key password (optional) used for mutual TLS authentication of your MSK/Apache Kafka brokers.

            • SERVER_ROOT_CA_CERTIFICATE – (Self-managed Apache Kafka) The Secrets Manager ARN of your secret key containing the root CA certificate (X.509 PEM) used for TLS encryption of your Apache Kafka brokers.

          • URI (string) –

            The value for your chosen configuration in Type. For example: "URI": "arn:aws:secretsmanager:us-east-1:01234567890:secret:MyBrokerSecretName".

      • SelfManagedEventSource (dict) –

        The self-managed Apache Kafka cluster for your event source.

        • Endpoints (dict) –

          The list of bootstrap servers for your Kafka brokers in the following format: "KAFKA_BOOTSTRAP_SERVERS": ["abc.xyz.com:xxxx","abc2.xyz.com:xxxx"].

          • (string) –

            • (list) –

              • (string) –

      • MaximumRecordAgeInSeconds (integer) –

        (Streams only) Discard records older than the specified age. The default value is -1, which sets the maximum age to infinite. When the value is set to infinite, Lambda never discards old records.

      • BisectBatchOnFunctionError (boolean) –

        (Streams only) If the function returns an error, split the batch in two and retry. The default value is false.

      • MaximumRetryAttempts (integer) –

        (Streams only) Discard records after the specified number of retries. The default value is -1, which sets the maximum number of retries to infinite. When MaximumRetryAttempts is infinite, Lambda retries failed records until the record expires in the event source.

      • TumblingWindowInSeconds (integer) –

        (Streams only) The duration in seconds of a processing window. The range is 1–900 seconds.

      • FunctionResponseTypes (list) –

        (Streams and Amazon SQS) A list of current response type enums applied to the event source mapping.

        • (string) –

      • AmazonManagedKafkaEventSourceConfig (dict) –

        Specific configuration settings for an Amazon Managed Streaming for Apache Kafka (Amazon MSK) event source.

        • ConsumerGroupId (string) –

          The identifier for the Kafka consumer group to join. The consumer group ID must be unique among all your Kafka event sources. After creating a Kafka event source mapping with the consumer group ID specified, you cannot update this value. For more information, see Customizable consumer group ID.

      • SelfManagedKafkaEventSourceConfig (dict) –

        Specific configuration settings for a self-managed Apache Kafka event source.

        • ConsumerGroupId (string) –

          The identifier for the Kafka consumer group to join. The consumer group ID must be unique among all your Kafka event sources. After creating a Kafka event source mapping with the consumer group ID specified, you cannot update this value. For more information, see Customizable consumer group ID.

      • ScalingConfig (dict) –

        (Amazon SQS only) The scaling configuration for the event source. For more information, see Configuring maximum concurrency for Amazon SQS event sources.

        • MaximumConcurrency (integer) –

          Limits the number of concurrent instances that the Amazon SQS event source can invoke.

      • DocumentDBEventSourceConfig (dict) –

        Specific configuration settings for a DocumentDB event source.

        • DatabaseName (string) –

          The name of the database to consume within the DocumentDB cluster.

        • CollectionName (string) –

          The name of the collection to consume within the database. If you do not specify a collection, Lambda consumes all collections.

        • FullDocument (string) –

          Determines what DocumentDB sends to your event stream during document update operations. If set to UpdateLookup, DocumentDB sends a delta describing the changes, along with a copy of the entire document. Otherwise, DocumentDB sends only a partial document that contains the changes.

Exceptions

• Lambda.Client.exceptions.ServiceException

• Lambda.Client.exceptions.ResourceNotFoundException

• Lambda.Client.exceptions.InvalidParameterValueException

• Lambda.Client.exceptions.TooManyRequestsException

Examples

The following example returns a list of the event source mappings for a function named my-function.

response = client.list_event_source_mappings(
    FunctionName='my-function',
)

print(response)

Expected Output:

{
    'EventSourceMappings': [
        {
            'BatchSize': 5,
            'EventSourceArn': 'arn:aws:sqs:us-west-2:123456789012:mySQSqueue',
            'FunctionArn': 'arn:aws:lambda:us-west-2:123456789012:function:my-function',
            'LastModified': 1569284520.333,
            'State': 'Enabled',
            'StateTransitionReason': 'USER_INITIATED',
            'UUID': 'a1b2c3d4-5678-90ab-cdef-11111EXAMPLE',
        },
    ],
    'ResponseMetadata': {
        '...': '...',
    },
}