io.micronaut.discovery.cloud.aws

Class AmazonComputeInstanceMetadataResolver

java.lang.Object

io.micronaut.discovery.cloud.aws.AmazonComputeInstanceMetadataResolver

All Implemented Interfaces:

ComputeInstanceMetadataResolver

@Singleton
 @Requires(env="ec2")
public class AmazonComputeInstanceMetadataResolver
extends Object
implements ComputeInstanceMetadataResolver

Resolves ComputeInstanceMetadata for Amazon EC2.

Since:

1.0

Author:

rvanderwerf, Graeme Rocher

Constructor Summary

Constructors

Constructor and Description
AmazonComputeInstanceMetadataResolver() Create a new instance to resolve ComputeInstanceMetadata for Amazon EC2 with default configurations.
AmazonComputeInstanceMetadataResolver(com.fasterxml.jackson.databind.ObjectMapper objectMapper, AmazonMetadataConfiguration configuration) Create a new instance to resolve ComputeInstanceMetadata for Amazon EC2.

Method Summary

Modifier and Type	Method and Description
protected com.fasterxml.jackson.databind.JsonNode	readEc2MetadataJson(URL url, int connectionTimeoutMs, int readTimeoutMs) Read EC2 metadata from the given URL.
Optional<ComputeInstanceMetadata>	resolve(Environment environment) Resolves ComputeInstanceMetadata for the current environment if possible.

Methods inherited from class java.lang.Object

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

Constructor Detail

AmazonComputeInstanceMetadataResolver

@Inject
public AmazonComputeInstanceMetadataResolver(com.fasterxml.jackson.databind.ObjectMapper objectMapper,
                                                     AmazonMetadataConfiguration configuration)

Create a new instance to resolve ComputeInstanceMetadata for Amazon EC2.

Parameters:

objectMapper - To convert AWS EC2 metadata information into Map

configuration - AWS Metadata configuration

AmazonComputeInstanceMetadataResolver

public AmazonComputeInstanceMetadataResolver()

Create a new instance to resolve ComputeInstanceMetadata for Amazon EC2 with default configurations.

Method Detail

resolve

public Optional<ComputeInstanceMetadata> resolve(Environment environment)

Description copied from interface: ComputeInstanceMetadataResolver

Resolves ComputeInstanceMetadata for the current environment if possible.

Specified by:

resolve in interface ComputeInstanceMetadataResolver

Parameters:

environment - The environment

Returns:

The ComputeInstanceMetadata

readEc2MetadataJson

protected com.fasterxml.jackson.databind.JsonNode readEc2MetadataJson(URL url,
                                                                      int connectionTimeoutMs,
                                                                      int readTimeoutMs)
                                                               throws IOException

Read EC2 metadata from the given URL.

Parameters:

url - URL to fetch AWS EC2 metadata information

connectionTimeoutMs - connection timeout in millis

readTimeoutMs - read timeout in millis

Returns:

AWS EC2 metadata information

Throws:

IOException - Signals that an I/O exception of some sort has occurred