Apache Ignite supports the following two distributed data structures for storing objects—Queue and Set. Queue and Set can be deployed in two modes:
- Collocated: All elements of the queue and set reside on the same cluster node, which is useful for small collections.
- Non-collocated: Useful for large collections. Elements of queue and set are equally distributed across the cluster. By default, all collections are non-collocated.
The CollectionConfiguration class provides the APIs to configure the collections (Set and Queue).
We can define a distributed Set as follows:
IgniteSet<T> set = ignite.set( "$name", // Set name. new CollectionConfiguration() // Collection configuration.);
The queue can be defined as follows:
IgniteQueue<T> ...
