1 package net.pterodactylus.sone.database.memory;
3 import static com.google.common.collect.FluentIterable.from;
5 import java.util.HashSet;
7 import java.util.concurrent.locks.ReadWriteLock;
8 import java.util.concurrent.locks.ReentrantReadWriteLock;
10 import net.pterodactylus.sone.data.Post;
11 import net.pterodactylus.sone.database.BookmarkDatabase;
13 import com.google.common.base.Function;
16 * Memory-based {@link BookmarkDatabase} implementation.
18 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
20 public class MemoryBookmarkDatabase implements BookmarkDatabase {
22 private final ReadWriteLock lock = new ReentrantReadWriteLock();
23 private final MemoryDatabase memoryDatabase;
24 private final Set<String> bookmarkedPosts = new HashSet<String>();
26 public MemoryBookmarkDatabase(MemoryDatabase memoryDatabase) {
27 this.memoryDatabase = memoryDatabase;
31 public void bookmarkPost(String postId) {
32 lock.writeLock().lock();
34 bookmarkedPosts.add(postId);
36 lock.writeLock().unlock();
41 public void bookmarkPost(Post post) {
42 lock.writeLock().lock();
44 bookmarkedPosts.add(post.getId());
46 lock.writeLock().unlock();
51 public void unbookmarkPost(Post post) {
52 lock.writeLock().lock();
54 bookmarkedPosts.remove(post.getId());
56 lock.writeLock().unlock();
61 public boolean isPostBookmarked(Post post) {
62 lock.readLock().lock();
64 return bookmarkedPosts.contains(post.getId());
66 lock.readLock().unlock();
71 public Set<Post> getBookmarkedPosts() {
72 lock.readLock().lock();
74 return from(bookmarkedPosts).transformAndConcat(
75 new Function<String, Iterable<Post>>() {
77 public Iterable<Post> apply(String postId) {
78 return memoryDatabase.getPost(postId).asSet();
82 lock.readLock().unlock();