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# AWS::GreengrassV2::ComponentVersion LambdaExecutionParameters
<a name="aws-properties-greengrassv2-componentversion-lambdaexecutionparameters"></a>

Contains parameters for a Lambda function that runs on Amazon IoT Greengrass.

## Syntax
<a name="aws-properties-greengrassv2-componentversion-lambdaexecutionparameters-syntax"></a>

To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-greengrassv2-componentversion-lambdaexecutionparameters-syntax.json"></a>

```
{
  "[EnvironmentVariables](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-environmentvariables)" : {Key: Value, ...},
  "[EventSources](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-eventsources)" : [ LambdaEventSource, ... ],
  "[ExecArgs](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-execargs)" : [ String, ... ],
  "[InputPayloadEncodingType](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-inputpayloadencodingtype)" : String,
  "[LinuxProcessParams](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-linuxprocessparams)" : LambdaLinuxProcessParams,
  "[MaxIdleTimeInSeconds](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-maxidletimeinseconds)" : Integer,
  "[MaxInstancesCount](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-maxinstancescount)" : Integer,
  "[MaxQueueSize](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-maxqueuesize)" : Integer,
  "[Pinned](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-pinned)" : Boolean,
  "[StatusTimeoutInSeconds](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-statustimeoutinseconds)" : Integer,
  "[TimeoutInSeconds](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-timeoutinseconds)" : Integer
}
```

### YAML
<a name="aws-properties-greengrassv2-componentversion-lambdaexecutionparameters-syntax.yaml"></a>

```
  [EnvironmentVariables](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-environmentvariables): 
    Key: Value
  [EventSources](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-eventsources): 
    - LambdaEventSource
  [ExecArgs](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-execargs): 
    - String
  [InputPayloadEncodingType](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-inputpayloadencodingtype): String
  [LinuxProcessParams](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-linuxprocessparams): 
    LambdaLinuxProcessParams
  [MaxIdleTimeInSeconds](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-maxidletimeinseconds): Integer
  [MaxInstancesCount](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-maxinstancescount): Integer
  [MaxQueueSize](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-maxqueuesize): Integer
  [Pinned](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-pinned): Boolean
  [StatusTimeoutInSeconds](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-statustimeoutinseconds): Integer
  [TimeoutInSeconds](#cfn-greengrassv2-componentversion-lambdaexecutionparameters-timeoutinseconds): Integer
```

## Properties
<a name="aws-properties-greengrassv2-componentversion-lambdaexecutionparameters-properties"></a>

`EnvironmentVariables`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-environmentvariables"></a>
The map of environment variables that are available to the Lambda function when it runs.  
*Required*: No  
*Type*: Object of String  
*Pattern*: `.+`  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`EventSources`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-eventsources"></a>
The list of event sources to which to subscribe to receive work messages. The Lambda function runs when it receives a message from an event source. You can subscribe this function to local publish/subscribe messages and Amazon IoT Core MQTT messages.  
*Required*: No  
*Type*: Array of [LambdaEventSource](aws-properties-greengrassv2-componentversion-lambdaeventsource.md)  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`ExecArgs`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-execargs"></a>
The list of arguments to pass to the Lambda function when it runs.  
*Required*: No  
*Type*: Array of String  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`InputPayloadEncodingType`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-inputpayloadencodingtype"></a>
The encoding type that the Lambda function supports.  
Default: `json`  
*Required*: No  
*Type*: String  
*Allowed values*: `json | binary`  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`LinuxProcessParams`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-linuxprocessparams"></a>
The parameters for the Linux process that contains the Lambda function.  
*Required*: No  
*Type*: [LambdaLinuxProcessParams](aws-properties-greengrassv2-componentversion-lambdalinuxprocessparams.md)  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`MaxIdleTimeInSeconds`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-maxidletimeinseconds"></a>
The maximum amount of time in seconds that a non-pinned Lambda function can idle before the Amazon IoT Greengrass Core software stops its process.  
*Required*: No  
*Type*: Integer  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`MaxInstancesCount`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-maxinstancescount"></a>
The maximum number of instances that a non-pinned Lambda function can run at the same time.  
*Required*: No  
*Type*: Integer  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`MaxQueueSize`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-maxqueuesize"></a>
The maximum size of the message queue for the Lambda function component. The Amazon IoT Greengrass core device stores messages in a FIFO (first-in-first-out) queue until it can run the Lambda function to consume each message.  
*Required*: No  
*Type*: Integer  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`Pinned`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-pinned"></a>
Whether or not the Lambda function is pinned, or long-lived.  
+ A pinned Lambda function starts when the Amazon IoT Greengrass Core starts and keeps running in its own container.
+ A non-pinned Lambda function starts only when it receives a work item and exists after it idles for `maxIdleTimeInSeconds`. If the function has multiple work items, the Amazon IoT Greengrass Core software creates multiple instances of the function.
Default: `true`  
*Required*: No  
*Type*: Boolean  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`StatusTimeoutInSeconds`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-statustimeoutinseconds"></a>
The interval in seconds at which a pinned (also known as long-lived) Lambda function component sends status updates to the Lambda manager component.  
*Required*: No  
*Type*: Integer  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`TimeoutInSeconds`  <a name="cfn-greengrassv2-componentversion-lambdaexecutionparameters-timeoutinseconds"></a>
The maximum amount of time in seconds that the Lambda function can process a work item.  
*Required*: No  
*Type*: Integer  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)