Package com.hazelcast.aws.utility

Class MetadataUtil

java.lang.Object

com.hazelcast.aws.utility.MetadataUtil

public final class MetadataUtil
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static String	AVAILABILITY_ZONE_URI	Post-fix URI to fetch availability-zone info.
static String	IAM_SECURITY_CREDENTIALS_URI	Post-fix URI to fetch IAM role details
static String	INSTANCE_METADATA_URI	This IP is only accessible inside AWS and is used to fetch metadata of running EC2 Instance.

Method Summary

Modifier and Type	Method	Description
static String	getAvailabilityZone(int connectionTimeoutSeconds, int connectionRetries)
static String	retrieveMetadataFromURI(String uri, int timeoutInSeconds)	Performs the HTTP request to retrieve AWS Instance Metadata from the given URI.
static String	retrieveMetadataFromURI(String uri, int timeoutInSeconds, int retries)	Performs the HTTP request to retrieve AWS Instance Metadata from the given URI.

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE_METADATA_URI

public static final String INSTANCE_METADATA_URI

This IP is only accessible inside AWS and is used to fetch metadata of running EC2 Instance. Outside connection is only possible with the keys. See details at http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html.

See Also:

Constant Field Values

IAM_SECURITY_CREDENTIALS_URI

public static final String IAM_SECURITY_CREDENTIALS_URI

Post-fix URI to fetch IAM role details

See Also:

Constant Field Values

AVAILABILITY_ZONE_URI

public static final String AVAILABILITY_ZONE_URI

Post-fix URI to fetch availability-zone info.

See Also:

Constant Field Values

Method Details

retrieveMetadataFromURI

public static String retrieveMetadataFromURI(String uri, int timeoutInSeconds)

Performs the HTTP request to retrieve AWS Instance Metadata from the given URI.

Parameters:

uri - the full URI where a `GET` request will retrieve the metadata information, represented as JSON.

timeoutInSeconds - timeout for the AWS service call

Returns:

The content of the HTTP response, as a String. NOTE: This is NEVER null.

retrieveMetadataFromURI

public static String retrieveMetadataFromURI(String uri, int timeoutInSeconds, int retries)

Performs the HTTP request to retrieve AWS Instance Metadata from the given URI.

Parameters:

uri - the full URI where a `GET` request will retrieve the metadata information, represented as JSON.

timeoutInSeconds - timeout for the AWS service call

retries - number of retries in case the AWS request fails

Returns:

The content of the HTTP response, as a String. NOTE: This is NEVER null.

getAvailabilityZone

public static String getAvailabilityZone(int connectionTimeoutSeconds, int connectionRetries)