com.crankuptheamps.client.PublishStoreResizeHandler Maven / Gradle / Ivy
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package com.crankuptheamps.client;
/**
* Interface used to indicate whether a Store implementation is allowed to
* grow (or shrink) to the requested size. If the request to resize is
* denied, a Store implementation may fail the operation that resulted in
* the request to grow by throwing an exception.
*/
public interface PublishStoreResizeHandler
{
/**
* Called by the {@link Store} when it wants to attempt a resize. Rather
* than allow a resize request to grow the store, and implementation
* could choose to flush the store (to allow space to be freed up)
* at the expense of publishing performance. If the store's unpersisted
* count doesn't decrease after a flush times out, it could indicate
* the client is disconnected or a server-side issue such as a
* synchronous replication destination is down.
*
* @param store The store sending the resize request.
* @param size The new size the store would like to resize to.
* @return A boolean indicating whether the Store is allowed to resize or not.
*/
public boolean invoke(Store store, long size);
}