io.micronaut.discovery.cloud

Class ComputeInstanceMetadataResolverUtils

java.lang.Object

io.micronaut.discovery.cloud.ComputeInstanceMetadataResolverUtils

@Internal
public class ComputeInstanceMetadataResolverUtils
extends Object

Utility class for ComputeInstanceMetadataResolver's.

Since:

1.1

Author:

Alvaro Sanchez-Mariscal

Constructor Summary

Constructors

Constructor and Description
ComputeInstanceMetadataResolverUtils()

Method Summary

Modifier and Type	Method and Description
static void	populateMetadata(AbstractComputeInstanceMetadata instanceMetadata, Map<?,?> metadata) Populates the instance instance metadata's AbstractComputeInstanceMetadata.setMetadata(Map) property.
static com.fasterxml.jackson.databind.JsonNode	readMetadataUrl(URL url, int connectionTimeoutMs, int readTimeoutMs, com.fasterxml.jackson.databind.ObjectMapper objectMapper, Map<String,String> requestProperties) Reads the result of a URL and parses it using the given ObjectMapper.
static Optional<String>	stringValue(com.fasterxml.jackson.databind.JsonNode json, String key) Resolve a value as a string from the metadata json.

Methods inherited from class java.lang.Object

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

Constructor Detail

ComputeInstanceMetadataResolverUtils

public ComputeInstanceMetadataResolverUtils()

Method Detail

readMetadataUrl

public static com.fasterxml.jackson.databind.JsonNode readMetadataUrl(URL url,
                                                                      int connectionTimeoutMs,
                                                                      int readTimeoutMs,
                                                                      com.fasterxml.jackson.databind.ObjectMapper objectMapper,
                                                                      Map<String,String> requestProperties)
                                                               throws IOException

Reads the result of a URL and parses it using the given ObjectMapper.

Parameters:

url - the URL to read

connectionTimeoutMs - connection timeout, in milliseconds

readTimeoutMs - read timeout, in milliseconds

objectMapper - Jackson's ObjectMapper

requestProperties - any request properties to pass

Returns:

a JsonNode instance

Throws:

IOException - if any I/O error occurs

stringValue

public static Optional<String> stringValue(com.fasterxml.jackson.databind.JsonNode json,
                                           String key)

Resolve a value as a string from the metadata json.

Parameters:

json - The json

key - The key

Returns:

An optional value

populateMetadata

public static void populateMetadata(AbstractComputeInstanceMetadata instanceMetadata,
                                    Map<?,?> metadata)

Populates the instance instance metadata's AbstractComputeInstanceMetadata.setMetadata(Map) property.

Parameters:

instanceMetadata - The instance metadata

metadata - A map of metadata