Package pl.wrzasq.lambda.metrics.dynamodb

Class Handler

java.lang.Object

pl.wrzasq.lambda.metrics.dynamodb.Handler

public class Handler
extends Object

CloudWatch Events request handler.

Required environment variables:

METRICS_NAMESPACE

Namespace to use for CloudWatch metrics.

Recommended memory: 256MB.

Field Summary

Fields

Modifier and Type	Field	Description
private CloudWatchDynamoDbMetricGenerator	metricGenerator	DynamoDB metrics generator.
private static String	METRICS_NAMESPACE	Metrics namespace to use.
private com.fasterxml.jackson.databind.ObjectMapper	objectMapper	JSON handler.

Constructor Summary

Constructors

Constructor	Description
Handler()	Default constructor.
Handler(com.fasterxml.jackson.databind.ObjectMapper objectMapper, CloudWatchDynamoDbMetricGenerator metricGenerator)

Method Summary

Modifier and Type	Method	Description
void	handle(InputStream inputStream, OutputStream outputStream)	Handles invocation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

METRICS_NAMESPACE

private static final String METRICS_NAMESPACE

Metrics namespace to use.

objectMapper

private com.fasterxml.jackson.databind.ObjectMapper objectMapper

JSON handler.

metricGenerator

private CloudWatchDynamoDbMetricGenerator metricGenerator

DynamoDB metrics generator.

Constructor Detail

Handler

public Handler()

Default constructor.

Handler

public Handler(com.fasterxml.jackson.databind.ObjectMapper objectMapper,
               CloudWatchDynamoDbMetricGenerator metricGenerator)

Method Detail

handle

public void handle(InputStream inputStream,
                   OutputStream outputStream)
            throws IOException

Handles invocation.

Parameters:

inputStream - Request input.

outputStream - Output stream.

Throws:

IOException - When JSON loading/dumping fails.