Madan Jampani | 35708a9 | 2016-07-06 10:48:19 -0700 | [diff] [blame^] | 1 | package org.onosproject.store.primitives.impl; |
| 2 | |
| 3 | import java.util.ArrayList; |
| 4 | import java.util.Collection; |
| 5 | import java.util.concurrent.CompletableFuture; |
| 6 | import java.util.concurrent.Executor; |
| 7 | import java.util.function.Consumer; |
| 8 | import java.util.stream.Collectors; |
| 9 | |
| 10 | import org.onosproject.store.service.WorkQueue; |
| 11 | import org.onosproject.store.service.Serializer; |
| 12 | import org.onosproject.store.service.Task; |
| 13 | import org.onosproject.store.service.WorkQueueStats; |
| 14 | |
| 15 | import com.google.common.collect.Collections2; |
| 16 | |
| 17 | /** |
| 18 | * Default implementation of {@link WorkQueue}. |
| 19 | * |
| 20 | * @param <E> task payload type. |
| 21 | */ |
| 22 | public class DefaultDistributedWorkQueue<E> implements WorkQueue<E> { |
| 23 | |
| 24 | private final WorkQueue<byte[]> backingQueue; |
| 25 | private final Serializer serializer; |
| 26 | |
| 27 | public DefaultDistributedWorkQueue(WorkQueue<byte[]> backingQueue, Serializer serializer) { |
| 28 | this.backingQueue = backingQueue; |
| 29 | this.serializer = serializer; |
| 30 | } |
| 31 | |
| 32 | @Override |
| 33 | public CompletableFuture<Void> addMultiple(Collection<E> items) { |
| 34 | return backingQueue.addMultiple(items.stream() |
| 35 | .map(serializer::encode) |
| 36 | .collect(Collectors.toCollection(ArrayList::new))); |
| 37 | } |
| 38 | |
| 39 | @Override |
| 40 | public CompletableFuture<Collection<Task<E>>> take(int maxTasks) { |
| 41 | return backingQueue.take(maxTasks) |
| 42 | .thenApply(tasks -> Collections2.transform(tasks, task -> task.<E>map(serializer::decode))); |
| 43 | } |
| 44 | |
| 45 | @Override |
| 46 | public CompletableFuture<Void> complete(Collection<String> ids) { |
| 47 | return backingQueue.complete(ids); |
| 48 | } |
| 49 | |
| 50 | @Override |
| 51 | public CompletableFuture<WorkQueueStats> stats() { |
| 52 | return backingQueue.stats(); |
| 53 | } |
| 54 | |
| 55 | @Override |
| 56 | public CompletableFuture<Void> registerTaskProcessor(Consumer<E> callback, |
| 57 | int parallelism, |
| 58 | Executor executor) { |
| 59 | Consumer<byte[]> backingQueueCallback = payload -> callback.accept(serializer.decode(payload)); |
| 60 | return backingQueue.registerTaskProcessor(backingQueueCallback, parallelism, executor); |
| 61 | } |
| 62 | |
| 63 | @Override |
| 64 | public CompletableFuture<Void> stopProcessing() { |
| 65 | return backingQueue.stopProcessing(); |
| 66 | } |
| 67 | } |