org.hawkular.inventory.api

Interface FeedIdStrategy

All Known Implementing Classes:

AcceptWithFallbackFeedIdStrategy, RandomUUIDFeedIdStrategy

public interface FeedIdStrategy

A FeedIdStrategy is a service that can supply unique IDs for feeds registering with the inventory.

Implementations of this interface are fed to the Inventory, which then uses it in the implementation of the Feeds.ReadWrite.create(Feed.Blueprint) method.

Since:

1.0

Author:

Lukas Krejci

Method Summary

Modifier and Type	Method and Description
String	generate(Inventory inventory, Feed proposedFeed) Generates a unique ID for the provided feed.

Method Detail

generate

String generate(Inventory inventory,
                Feed proposedFeed)
         throws EntityAlreadyExistsException

Generates a unique ID for the provided feed. The id of the provided feed is the one proposed by the caller.

Parameters:

inventory - the inventory implementation to optionally consult some constraints

proposedFeed - the feed to be generated with the ID proposed by the caller

Returns:

the ID to be used for the feed, returned to the caller.

Throws:

EntityAlreadyExistsException - if a feed with the proposed ID exists and no alternatives can be proposed by this strategy.