Package com.netflix.discovery.endpoint

Class EndpointUtils

java.lang.Object

com.netflix.discovery.endpoint.EndpointUtils

public class EndpointUtils
extends java.lang.Object

This class contains some of the utility functions previously found in DiscoveryClient, but should be elsewhere. It *does not yet* clean up the moved code.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	EndpointUtils.DiscoveryUrlType
static class	EndpointUtils.InstanceInfoBasedUrlRandomizer
static interface	EndpointUtils.ServiceUrlRandomizer

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	DEFAULT_REGION
static java.lang.String	DEFAULT_ZONE

Constructor Summary

Constructors

Constructor	Description
EndpointUtils()

Method Summary

Modifier and Type	Method	Description
static java.util.List<java.lang.String>	getDiscoveryServiceUrls(EurekaClientConfig clientConfig, java.lang.String zone, EndpointUtils.ServiceUrlRandomizer randomizer)	Get the list of all eureka service urls for the eureka client to talk to.
static java.util.Set<java.lang.String>	getEC2DiscoveryUrlsFromZone(java.lang.String dnsName, EndpointUtils.DiscoveryUrlType type)	Get the list of EC2 URLs given the zone name.
static java.lang.String	getRegion(EurekaClientConfig clientConfig)	Get the region that this particular instance is in.
static java.util.List<java.lang.String>	getServiceUrlsFromConfig(EurekaClientConfig clientConfig, java.lang.String instanceZone, boolean preferSameZone)	Get the list of all eureka service urls from properties file for the eureka client to talk to.
static java.util.List<java.lang.String>	getServiceUrlsFromDNS(EurekaClientConfig clientConfig, java.lang.String instanceZone, boolean preferSameZone, EndpointUtils.ServiceUrlRandomizer randomizer)	Get the list of all eureka service urls from DNS for the eureka client to talk to.
static java.util.Map<java.lang.String,java.util.List<java.lang.String>>	getServiceUrlsMapFromConfig(EurekaClientConfig clientConfig, java.lang.String instanceZone, boolean preferSameZone)	Get the list of all eureka service urls from properties file for the eureka client to talk to.
static java.util.Map<java.lang.String,java.util.List<java.lang.String>>	getZoneBasedDiscoveryUrlsFromRegion(EurekaClientConfig clientConfig, java.lang.String region)	Get the zone based CNAMES that are bound to a region.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_REGION

public static final java.lang.String DEFAULT_REGION

See Also:

Constant Field Values

DEFAULT_ZONE

public static final java.lang.String DEFAULT_ZONE

See Also:

Constant Field Values

Constructor Detail

EndpointUtils

public EndpointUtils()

Method Detail

getDiscoveryServiceUrls

public static java.util.List<java.lang.String> getDiscoveryServiceUrls(EurekaClientConfig clientConfig,
                                                                       java.lang.String zone,
                                                                       EndpointUtils.ServiceUrlRandomizer randomizer)

Get the list of all eureka service urls for the eureka client to talk to.

Parameters:

clientConfig - the clientConfig to use

zone - the zone in which the client resides

randomizer - a randomizer to randomized returned urls, if loading from dns

Returns:

The list of all eureka service urls for the eureka client to talk to.

getServiceUrlsFromDNS

public static java.util.List<java.lang.String> getServiceUrlsFromDNS(EurekaClientConfig clientConfig,
                                                                     java.lang.String instanceZone,
                                                                     boolean preferSameZone,
                                                                     EndpointUtils.ServiceUrlRandomizer randomizer)

Get the list of all eureka service urls from DNS for the eureka client to talk to. The client picks up the service url from its zone and then fails over to other zones randomly. If there are multiple servers in the same zone, the client once again picks one randomly. This way the traffic will be distributed in the case of failures.

Parameters:

clientConfig - the clientConfig to use

instanceZone - The zone in which the client resides.

preferSameZone - true if we have to prefer the same zone as the client, false otherwise.

randomizer - a randomizer to randomized returned urls

Returns:

The list of all eureka service urls for the eureka client to talk to.

getServiceUrlsFromConfig

public static java.util.List<java.lang.String> getServiceUrlsFromConfig(EurekaClientConfig clientConfig,
                                                                        java.lang.String instanceZone,
                                                                        boolean preferSameZone)

Get the list of all eureka service urls from properties file for the eureka client to talk to.

Parameters:

clientConfig - the clientConfig to use

instanceZone - The zone in which the client resides

preferSameZone - true if we have to prefer the same zone as the client, false otherwise

Returns:

The list of all eureka service urls for the eureka client to talk to

getServiceUrlsMapFromConfig

public static java.util.Map<java.lang.String,java.util.List<java.lang.String>> getServiceUrlsMapFromConfig(EurekaClientConfig clientConfig,
                                                                                                                 java.lang.String instanceZone,
                                                                                                                 boolean preferSameZone)

Get the list of all eureka service urls from properties file for the eureka client to talk to.

Parameters:

clientConfig - the clientConfig to use

instanceZone - The zone in which the client resides

preferSameZone - true if we have to prefer the same zone as the client, false otherwise

Returns:

an (ordered) map of zone -> list of urls mappings, with the preferred zone first in iteration order

getEC2DiscoveryUrlsFromZone

public static java.util.Set<java.lang.String> getEC2DiscoveryUrlsFromZone(java.lang.String dnsName,
                                                                          EndpointUtils.DiscoveryUrlType type)

Get the list of EC2 URLs given the zone name.

Parameters:

dnsName - The dns name of the zone-specific CNAME

type - CNAME or EIP that needs to be retrieved

Returns:

The list of EC2 URLs associated with the dns name

getZoneBasedDiscoveryUrlsFromRegion

public static java.util.Map<java.lang.String,java.util.List<java.lang.String>> getZoneBasedDiscoveryUrlsFromRegion(EurekaClientConfig clientConfig,
                                                                                                                         java.lang.String region)

Get the zone based CNAMES that are bound to a region.

Parameters:

region - - The region for which the zone names need to be retrieved

Returns:

- The list of CNAMES from which the zone-related information can be retrieved

getRegion

public static java.lang.String getRegion(EurekaClientConfig clientConfig)

Get the region that this particular instance is in.

Returns:

- The region in which the particular instance belongs to.