com.pushtechnology.diffusion.client.features

Interface Topics.FetchResult<V>

Type Parameters:

V - The result value type. This would be Void unless the request indicated that values are to be returned, in which case this would be the value class requested.

Enclosing interface:

Topics

public static interface Topics.FetchResult<V>

Encapsulates the results from a fetch operation issued to the server.

A fetch operation is issued using a fetch request which will return a result of this type via a CompletableFuture.

Since:

6.2

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Topics.FetchResult.TopicResult<V> Encapsulates the result of a fetch invocation for a single selected topic.

Method Summary

Modifier and Type	Method and Description
boolean	hasMore() Indicates whether the fetch could have returned more results if it had not been constrained by the first, last or maximumResultSize limits.
boolean	isEmpty() Returns true if the result contains zero elements.
List<Topics.FetchResult.TopicResult<V>>	results() Returns the results from the fetch operation.
int	size() The number of elements in the fetch result.

Method Detail

results

List<Topics.FetchResult.TopicResult<V>> results()

Returns the results from the fetch operation.

Results are always returned in path order.

Returns:

a list of topic results, each representing a result single topic selected by the fetch operation.

hasMore

boolean hasMore()

Indicates whether the fetch could have returned more results if it had not been constrained by the first, last or maximumResultSize limits. A fetch that requests no results can be used together with this method to query whether there are topics that match the selector provided to Topics.FetchRequest.fetch(com.pushtechnology.diffusion.client.topics.TopicSelector), without retrieving the details of any of the topics. For example:

 topics.fetchRequest().first(0).fetch("?x//").thenAccept(fetchResult -> {
     if (fetchResult.hasMore()) {
         System.out.println("There are topics in branch 'x'.");
     }
 }
 

Returns:

true if more results could have been returned, otherwise false

size

int size()

The number of elements in the fetch result.

Returns:

the size of the results list

Since:

6.3

isEmpty

boolean isEmpty()

Returns true if the result contains zero elements.

Returns:

true if result list is empty

Since:

6.3