org.ametiste.scm.coordinator.accessor

Class EurekaEventSubscribersFetcher

java.lang.Object

org.ametiste.scm.coordinator.accessor.EurekaEventSubscribersFetcher

All Implemented Interfaces:

org.ametiste.scm.coordinator.accessor.EventSubscribersFetcher

public class EurekaEventSubscribersFetcher
extends java.lang.Object
implements org.ametiste.scm.coordinator.accessor.EventSubscribersFetcher

EurekaEventSubscribersFetcher implements EventSubscribersFetcher interface and provide functionality for taking SCM event subscribers from Netflix Eureka Server.

Fetcher use Netflix DiscoveryClient to communicate with Eureka Server.

Fetcher get all registered application from server and filter only those who has specified boolean field with value true and event receiver url path in metadata section. This criteria allow us don't bother in naming of application and constructing event receiver endpoint url.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	EVENT_RECEIVER_URL_PATH_FIELD
static java.lang.String	SUBSCRIBER_METADATA_FIELD

Constructor Summary

Constructors

Constructor and Description
EurekaEventSubscribersFetcher(com.netflix.discovery.DiscoveryClient discoveryClient) Create instance of EurekaEventSubscribersFetcher.

Method Summary

Modifier and Type	Method and Description
java.util.Collection<java.net.URI>	fetchSubscribers()
java.util.Collection<java.net.URI>	fetchSubscribers(java.lang.String pattern) Fetch subscribers from coordinator that application name match to specified regexp pattern.

Methods inherited from class java.lang.Object

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

Field Detail

SUBSCRIBER_METADATA_FIELD

public static final java.lang.String SUBSCRIBER_METADATA_FIELD

See Also:

Constant Field Values

EVENT_RECEIVER_URL_PATH_FIELD

public static final java.lang.String EVENT_RECEIVER_URL_PATH_FIELD

See Also:

Constant Field Values

Constructor Detail

EurekaEventSubscribersFetcher

public EurekaEventSubscribersFetcher(com.netflix.discovery.DiscoveryClient discoveryClient)

Create instance of EurekaEventSubscribersFetcher.

Parameters:

discoveryClient - Netflix DiscoveryClient instance to communicate with Eureka Server.

Method Detail

fetchSubscribers

public java.util.Collection<java.net.URI> fetchSubscribers()
                                                    throws org.ametiste.scm.coordinator.accessor.FetchSubscribersException

Specified by:

fetchSubscribers in interface org.ametiste.scm.coordinator.accessor.EventSubscribersFetcher

Throws:

org.ametiste.scm.coordinator.accessor.FetchSubscribersException

fetchSubscribers

public java.util.Collection<java.net.URI> fetchSubscribers(java.lang.String pattern)
                                                    throws org.ametiste.scm.coordinator.accessor.FetchSubscribersException

Fetch subscribers from coordinator that application name match to specified regexp pattern. Application name transforms to lower case before comparing.

Specified by:

fetchSubscribers in interface org.ametiste.scm.coordinator.accessor.EventSubscribersFetcher

Parameters:

pattern - string that contains regular expression for filtering.

Returns:

collection of URIs for messaging with subscribers. If subscribers absent returns empty collection.

Throws:

org.ametiste.scm.coordinator.accessor.FetchSubscribersException