Taking advantage of a running Lambda function and it’s state
https://aws.amazon.com/blogs/compute/sharing-secrets-with-aws-lambda-using-aws-systems-manager-parameter-store/ under the section Lambda function has a nice “trick” of setting above the class
app = None
then later on it will see if that is set
def lambda_handler(event, context): global app # Initialize app if it doesn't yet exist if app is None: print("Loading config and creating new MyApp...") config = load_config(full_config_path) app = MyApp(config) return "MyApp config is " + str(app.get_config()._sections)
If it is set it will not try to set it again but take advantage of the state and use it.
You can set a bunch of schedulers and your Lambda function can check for the context of the request. If it is a scheduler event then just reply OK otherwise it should do what it normally would do.
import boto3 from config import Config class KeepAwake: def __init__(self): """ keey awake """ self.config = Config() self.region = self.config.region self.app_env = self.config.app_env self.client = boto3.client('lambda', region_name=self.region) self.functions = [ "foo", "bar", ] def run(self): """ interate over lambda functions """ for lam in self.functions: print("Invoking ", lam) self.client.invoke( FunctionName=lam, InvocationType="Event" ) print("Invoked ", lam)
Is another way to look around and call those functions.
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