| package org.onosproject.store.primitives.impl; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.Executor; |
| import java.util.function.Consumer; |
| import java.util.stream.Collectors; |
| |
| import org.onosproject.store.service.WorkQueue; |
| import org.onosproject.store.service.Serializer; |
| import org.onosproject.store.service.Task; |
| import org.onosproject.store.service.WorkQueueStats; |
| |
| import com.google.common.collect.Collections2; |
| |
| /** |
| * Default implementation of {@link WorkQueue}. |
| * |
| * @param <E> task payload type. |
| */ |
| public class DefaultDistributedWorkQueue<E> implements WorkQueue<E> { |
| |
| private final WorkQueue<byte[]> backingQueue; |
| private final Serializer serializer; |
| |
| public DefaultDistributedWorkQueue(WorkQueue<byte[]> backingQueue, Serializer serializer) { |
| this.backingQueue = backingQueue; |
| this.serializer = serializer; |
| } |
| |
| @Override |
| public String name() { |
| return backingQueue.name(); |
| } |
| |
| @Override |
| public CompletableFuture<Void> addMultiple(Collection<E> items) { |
| return backingQueue.addMultiple(items.stream() |
| .map(serializer::encode) |
| .collect(Collectors.toCollection(ArrayList::new))); |
| } |
| |
| private Collection<Task<E>> decodeCollection(Collection<Task<byte[]>> tasks) { |
| return Collections2.transform(tasks, task -> task.map(serializer::decode)); |
| } |
| |
| @Override |
| public CompletableFuture<Collection<Task<E>>> take(int maxTasks) { |
| return backingQueue.take(maxTasks) |
| .thenApply(this::decodeCollection); |
| } |
| |
| @Override |
| public CompletableFuture<Void> complete(Collection<String> ids) { |
| return backingQueue.complete(ids); |
| } |
| |
| @Override |
| public CompletableFuture<WorkQueueStats> stats() { |
| return backingQueue.stats(); |
| } |
| |
| @Override |
| public CompletableFuture<Void> registerTaskProcessor(Consumer<E> callback, |
| int parallelism, |
| Executor executor) { |
| Consumer<byte[]> backingQueueCallback = payload -> callback.accept(serializer.decode(payload)); |
| return backingQueue.registerTaskProcessor(backingQueueCallback, parallelism, executor); |
| } |
| |
| @Override |
| public CompletableFuture<Void> stopProcessing() { |
| return backingQueue.stopProcessing(); |
| } |
| } |