public interface AWSLambda
This is the AWS Lambda API Reference. The AWS Lambda Developer Guide provides additional information. For the service overview, see What is AWS Lambda, and for information about how the service works, see AWS Lambda: How it Works in the AWS Lambda Developer Guide.
|Modifier and Type||Method and Description|
Returns additional metadata for a previously executed successful request, typically used for debugging issues where a service isn't acting as expected.
Invokes a Lambda function.
Overrides the default endpoint for this client ("https://lambda.us-east-1.amazonaws.com").
An alternative to
Shuts down this client object, releasing any resources that might be held open.
void setEndpoint(java.lang.String endpoint) throws java.lang.IllegalArgumentException
Callers can pass in just the endpoint (ex:
"lambda.us-east-1.amazonaws.com") or a full URL, including the protocol
(ex: "https://lambda.us-east-1.amazonaws.com"). If the protocol is not
specified here, the default protocol from this client's
ClientConfiguration will be used, which by default is HTTPS.
For more information on using AWS regions with the AWS SDK for Java, and a complete list of all available endpoints for all AWS services, see: http://developer.amazonwebservices.com/connect/entry.jspa?externalID= 3912
This method is not threadsafe. An endpoint should be configured when the client is created and before any service requests are made. Changing it afterwards creates inevitable race conditions for any service requests in transit or retrying.
endpoint- The endpoint (ex: "lambda.us-east-1.amazonaws.com") or a full URL, including the protocol (ex: "https://lambda.us-east-1.amazonaws.com") of the region specific AWS endpoint this client will communicate with.
java.lang.IllegalArgumentException- If any problems are detected with the specified endpoint.
void setRegion(Region region) throws java.lang.IllegalArgumentException
setEndpoint(String), sets the regional endpoint for this client's service calls. Callers can use this method to control which AWS region they want to work with.
By default, all service endpoints in all regions use the https protocol.
To use http instead, specify it in the
supplied at construction.
This method is not threadsafe. A region should be configured when the client is created and before any service requests are made. Changing it afterwards creates inevitable race conditions for any service requests in transit or retrying.
region- The region this client will communicate with. See
Region.getRegion(com.amazonaws.regions.Regions)for accessing a given region.
java.lang.IllegalArgumentException- If the given region is null, or if this service isn't available in the given region. See
Region.createClient(Class, com.amazonaws.auth.AWSCredentialsProvider, ClientConfiguration)
InvokeResult invoke(InvokeRequest invokeRequest) throws AmazonClientException, AmazonServiceException
Invokes a Lambda function. You can invoke a function synchronously (and
wait for the response), or asynchronously. To invoke a function
For synchronous invocation, details about the function response, including errors, are included in the response body and headers. For either invocation type, you can find more information in the execution log and trace.
When an error occurs, your function may be invoked multiple times. Retry behavior varies by error type, client, event source, and invocation type. For example, if you invoke a function asynchronously and it returns an error, Lambda executes the function up to two more times. For more information, see Retry Behavior.
For asynchronous invocation, Lambda adds events to a queue before sending them to your function. If your function does not have enough capacity to keep up with the queue, events may be lost. Occasionally, your function may receive the same event multiple times, even if no error occurs. To retain events that were not processed, configure your function with a dead-letter queue.
The status code in the API response doesn't reflect function errors.
Error codes are reserved for errors that prevent your function from
executing, such as permissions errors, limit
errors, or issues with your function's code and configuration. For
example, Lambda returns
executing the function would cause you to exceed a concurrency limit at
either the account level (
or function level (
For functions with a long timeout, your client might be disconnected during synchronous invocation while it waits for a response. Configure your HTTP client, SDK, firewall, proxy, or operating system to allow for long connections with timeout or keep-alive settings.
This operation requires permission for the
AmazonClientException- If any internal errors are encountered inside the client while attempting to make the request or handle the response. For example if a network connection is not available.
AmazonServiceException- If an error response is returned by AWS Lambda indicating either a problem with the data in the request, or a server side issue.
ResponseMetadata getCachedResponseMetadata(AmazonWebServiceRequest request)
Response metadata is only cached for a limited period of time, so if you need to access this extra diagnostic information for an executed request, you should use this method to retrieve it as soon as possible after executing a request.
request- The originally executed request.
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