-/*
- * Sone - MemoryDatabase.java - Copyright © 2013–2016 David Roden
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package net.pterodactylus.sone.database.memory;
-
-import static com.google.common.base.Preconditions.checkNotNull;
-import static com.google.common.base.Predicates.not;
-import static com.google.common.collect.FluentIterable.from;
-import static net.pterodactylus.sone.data.Reply.TIME_COMPARATOR;
-import static net.pterodactylus.sone.data.Sone.LOCAL_SONE_FILTER;
-import static net.pterodactylus.sone.data.Sone.toAllAlbums;
-import static net.pterodactylus.sone.data.Sone.toAllImages;
-
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.locks.ReadWriteLock;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
-
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
-
-import net.pterodactylus.sone.data.Album;
-import net.pterodactylus.sone.data.Image;
-import net.pterodactylus.sone.data.Post;
-import net.pterodactylus.sone.data.PostReply;
-import net.pterodactylus.sone.data.Sone;
-import net.pterodactylus.sone.data.impl.AlbumBuilderImpl;
-import net.pterodactylus.sone.data.impl.ImageBuilderImpl;
-import net.pterodactylus.sone.database.AlbumBuilder;
-import net.pterodactylus.sone.database.Database;
-import net.pterodactylus.sone.database.DatabaseException;
-import net.pterodactylus.sone.database.ImageBuilder;
-import net.pterodactylus.sone.database.PostBuilder;
-import net.pterodactylus.sone.database.PostDatabase;
-import net.pterodactylus.sone.database.PostReplyBuilder;
-import net.pterodactylus.sone.database.SoneBuilder;
-import net.pterodactylus.util.config.Configuration;
-import net.pterodactylus.util.config.ConfigurationException;
-
-import com.google.common.base.Predicate;
-import com.google.common.collect.HashMultimap;
-import com.google.common.collect.Multimap;
-import com.google.common.collect.SortedSetMultimap;
-import com.google.common.collect.TreeMultimap;
-import com.google.common.util.concurrent.AbstractService;
-import com.google.inject.Inject;
-import com.google.inject.Singleton;
-import kotlin.jvm.functions.Function1;
-
-/**
- * Memory-based {@link PostDatabase} implementation.
- *
- * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
- */
-@Singleton
-public class MemoryDatabase extends AbstractService implements Database {
-
- /** The lock. */
- private final ReadWriteLock lock = new ReentrantReadWriteLock();
-
- /** The configuration. */
- private final Configuration configuration;
- private final ConfigurationLoader configurationLoader;
-
- private final Map<String, Sone> allSones = new HashMap<String, Sone>();
-
- /** All posts by their ID. */
- private final Map<String, Post> allPosts = new HashMap<String, Post>();
-
- /** All posts by their Sones. */
- private final Multimap<String, Post> sonePosts = HashMultimap.create();
-
- /** Whether posts are known. */
- private final Set<String> knownPosts = new HashSet<String>();
-
- /** All post replies by their ID. */
- private final Map<String, PostReply> allPostReplies = new HashMap<String, PostReply>();
-
- /** Replies sorted by Sone. */
- private final SortedSetMultimap<String, PostReply> sonePostReplies = TreeMultimap.create(new Comparator<String>() {
-
- @Override
- public int compare(String leftString, String rightString) {
- return leftString.compareTo(rightString);
- }
- }, TIME_COMPARATOR);
-
- /** Whether post replies are known. */
- private final Set<String> knownPostReplies = new HashSet<String>();
-
- private final Map<String, Album> allAlbums = new HashMap<String, Album>();
- private final Multimap<String, Album> soneAlbums = HashMultimap.create();
-
- private final Map<String, Image> allImages = new HashMap<String, Image>();
- private final Multimap<String, Image> soneImages = HashMultimap.create();
-
- private final MemoryBookmarkDatabase memoryBookmarkDatabase;
- private final MemoryFriendDatabase memoryFriendDatabase;
-
- /**
- * Creates a new memory database.
- *
- * @param configuration
- * The configuration for loading and saving elements
- */
- @Inject
- public MemoryDatabase(Configuration configuration) {
- this.configuration = configuration;
- this.configurationLoader = new ConfigurationLoader(configuration);
- memoryBookmarkDatabase =
- new MemoryBookmarkDatabase(this, configurationLoader);
- memoryFriendDatabase = new MemoryFriendDatabase(configurationLoader);
- }
-
- //
- // DATABASE METHODS
- //
-
- /**
- * Saves the database.
- *
- * @throws DatabaseException
- * if an error occurs while saving
- */
- @Override
- public void save() throws DatabaseException {
- saveKnownPosts();
- saveKnownPostReplies();
- }
-
- //
- // SERVICE METHODS
- //
-
- /** {@inheritDocs} */
- @Override
- protected void doStart() {
- memoryBookmarkDatabase.start();
- loadKnownPosts();
- loadKnownPostReplies();
- notifyStarted();
- }
-
- /** {@inheritDocs} */
- @Override
- protected void doStop() {
- try {
- memoryBookmarkDatabase.stop();
- save();
- notifyStopped();
- } catch (DatabaseException de1) {
- notifyFailed(de1);
- }
- }
-
- @Override
- public SoneBuilder newSoneBuilder() {
- return new MemorySoneBuilder(this);
- }
-
- @Override
- public void storeSone(Sone sone) {
- lock.writeLock().lock();
- try {
- removeSone(sone);
-
- allSones.put(sone.getId(), sone);
- sonePosts.putAll(sone.getId(), sone.getPosts());
- for (Post post : sone.getPosts()) {
- allPosts.put(post.getId(), post);
- }
- sonePostReplies.putAll(sone.getId(), sone.getReplies());
- for (PostReply postReply : sone.getReplies()) {
- allPostReplies.put(postReply.getId(), postReply);
- }
- soneAlbums.putAll(sone.getId(), toAllAlbums.apply(sone));
- for (Album album : toAllAlbums.apply(sone)) {
- allAlbums.put(album.getId(), album);
- }
- soneImages.putAll(sone.getId(), toAllImages.apply(sone));
- for (Image image : toAllImages.apply(sone)) {
- allImages.put(image.getId(), image);
- }
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- @Override
- public void removeSone(Sone sone) {
- lock.writeLock().lock();
- try {
- allSones.remove(sone.getId());
- Collection<Post> removedPosts = sonePosts.removeAll(sone.getId());
- for (Post removedPost : removedPosts) {
- allPosts.remove(removedPost.getId());
- }
- Collection<PostReply> removedPostReplies =
- sonePostReplies.removeAll(sone.getId());
- for (PostReply removedPostReply : removedPostReplies) {
- allPostReplies.remove(removedPostReply.getId());
- }
- Collection<Album> removedAlbums =
- soneAlbums.removeAll(sone.getId());
- for (Album removedAlbum : removedAlbums) {
- allAlbums.remove(removedAlbum.getId());
- }
- Collection<Image> removedImages =
- soneImages.removeAll(sone.getId());
- for (Image removedImage : removedImages) {
- allImages.remove(removedImage.getId());
- }
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- @Nonnull
- @Override
- public Function1<String, Sone> getSoneLoader() {
- return new Function1<String, Sone>() {
- @Override
- public Sone invoke(String soneId) {
- return getSone(soneId);
- }
- };
- }
-
- @Override
- public Sone getSone(String soneId) {
- lock.readLock().lock();
- try {
- return allSones.get(soneId);
- } finally {
- lock.readLock().unlock();
- }
- }
-
- @Override
- public Collection<Sone> getSones() {
- lock.readLock().lock();
- try {
- return new HashSet<Sone>(allSones.values());
- } finally {
- lock.readLock().unlock();
- }
- }
-
- @Override
- public Collection<Sone> getLocalSones() {
- lock.readLock().lock();
- try {
- return from(allSones.values()).filter(LOCAL_SONE_FILTER).toSet();
- } finally {
- lock.readLock().unlock();
- }
- }
-
- @Override
- public Collection<Sone> getRemoteSones() {
- lock.readLock().lock();
- try {
- return from(allSones.values())
- .filter(not(LOCAL_SONE_FILTER)) .toSet();
- } finally {
- lock.readLock().unlock();
- }
- }
-
- @Override
- public Collection<String> getFriends(Sone localSone) {
- if (!localSone.isLocal()) {
- return Collections.emptySet();
- }
- return memoryFriendDatabase.getFriends(localSone.getId());
- }
-
- @Override
- public boolean isFriend(Sone localSone, String friendSoneId) {
- if (!localSone.isLocal()) {
- return false;
- }
- return memoryFriendDatabase.isFriend(localSone.getId(), friendSoneId);
- }
-
- @Override
- public void addFriend(Sone localSone, String friendSoneId) {
- if (!localSone.isLocal()) {
- return;
- }
- memoryFriendDatabase.addFriend(localSone.getId(), friendSoneId);
- }
-
- @Override
- public void removeFriend(Sone localSone, String friendSoneId) {
- if (!localSone.isLocal()) {
- return;
- }
- memoryFriendDatabase.removeFriend(localSone.getId(), friendSoneId);
- }
-
- @Nullable
- @Override
- public Long getFollowingTime(@Nonnull String friendSoneId) {
- return memoryFriendDatabase.getFollowingTime(friendSoneId);
- }
-
- //
- // POSTPROVIDER METHODS
- //
-
- @Nullable
- @Override
- public Post getPost(@Nonnull String postId) {
- lock.readLock().lock();
- try {
- return allPosts.get(postId);
- } finally {
- lock.readLock().unlock();
- }
- }
-
- /** {@inheritDocs} */
- @Override
- public Collection<Post> getPosts(String soneId) {
- return new HashSet<Post>(getPostsFrom(soneId));
- }
-
- /** {@inheritDocs} */
- @Override
- public Collection<Post> getDirectedPosts(final String recipientId) {
- lock.readLock().lock();
- try {
- return from(sonePosts.values()).filter(new Predicate<Post>() {
- @Override
- public boolean apply(Post post) {
- return post.getRecipientId().asSet().contains(recipientId);
- }
- }).toSet();
- } finally {
- lock.readLock().unlock();
- }
- }
-
- //
- // POSTBUILDERFACTORY METHODS
- //
-
- /** {@inheritDocs} */
- @Override
- public PostBuilder newPostBuilder() {
- return new MemoryPostBuilder(this, this);
- }
-
- //
- // POSTSTORE METHODS
- //
-
- /** {@inheritDocs} */
- @Override
- public void storePost(Post post) {
- checkNotNull(post, "post must not be null");
- lock.writeLock().lock();
- try {
- allPosts.put(post.getId(), post);
- getPostsFrom(post.getSone().getId()).add(post);
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- /** {@inheritDocs} */
- @Override
- public void removePost(Post post) {
- checkNotNull(post, "post must not be null");
- lock.writeLock().lock();
- try {
- allPosts.remove(post.getId());
- getPostsFrom(post.getSone().getId()).remove(post);
- post.getSone().removePost(post);
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- //
- // POSTREPLYPROVIDER METHODS
- //
-
- @Nullable
- @Override
- public PostReply getPostReply(String id) {
- lock.readLock().lock();
- try {
- return allPostReplies.get(id);
- } finally {
- lock.readLock().unlock();
- }
- }
-
- /** {@inheritDocs} */
- @Override
- public List<PostReply> getReplies(final String postId) {
- lock.readLock().lock();
- try {
- return from(allPostReplies.values())
- .filter(new Predicate<PostReply>() {
- @Override
- public boolean apply(PostReply postReply) {
- return postReply.getPostId().equals(postId);
- }
- }).toSortedList(TIME_COMPARATOR);
- } finally {
- lock.readLock().unlock();
- }
- }
-
- //
- // POSTREPLYBUILDERFACTORY METHODS
- //
-
- /** {@inheritDocs} */
- @Override
- public PostReplyBuilder newPostReplyBuilder() {
- return new MemoryPostReplyBuilder(this, this);
- }
-
- //
- // POSTREPLYSTORE METHODS
- //
-
- /** {@inheritDocs} */
- @Override
- public void storePostReply(PostReply postReply) {
- lock.writeLock().lock();
- try {
- allPostReplies.put(postReply.getId(), postReply);
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- /** {@inheritDocs} */
- @Override
- public void removePostReply(PostReply postReply) {
- lock.writeLock().lock();
- try {
- allPostReplies.remove(postReply.getId());
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- //
- // ALBUMPROVDER METHODS
- //
-
- @Nullable
- @Override
- public Album getAlbum(@Nonnull String albumId) {
- lock.readLock().lock();
- try {
- return allAlbums.get(albumId);
- } finally {
- lock.readLock().unlock();
- }
- }
-
- //
- // ALBUMBUILDERFACTORY METHODS
- //
-
- @Override
- public AlbumBuilder newAlbumBuilder() {
- return new AlbumBuilderImpl();
- }
-
- //
- // ALBUMSTORE METHODS
- //
-
- @Override
- public void storeAlbum(Album album) {
- lock.writeLock().lock();
- try {
- allAlbums.put(album.getId(), album);
- soneAlbums.put(album.getSone().getId(), album);
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- @Override
- public void removeAlbum(Album album) {
- lock.writeLock().lock();
- try {
- allAlbums.remove(album.getId());
- soneAlbums.remove(album.getSone().getId(), album);
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- //
- // IMAGEPROVIDER METHODS
- //
-
- @Nullable
- @Override
- public Image getImage(@Nonnull String imageId) {
- lock.readLock().lock();
- try {
- return allImages.get(imageId);
- } finally {
- lock.readLock().unlock();
- }
- }
-
- //
- // IMAGEBUILDERFACTORY METHODS
- //
-
- @Override
- public ImageBuilder newImageBuilder() {
- return new ImageBuilderImpl();
- }
-
- //
- // IMAGESTORE METHODS
- //
-
- @Override
- public void storeImage(Image image) {
- lock.writeLock().lock();
- try {
- allImages.put(image.getId(), image);
- soneImages.put(image.getSone().getId(), image);
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- @Override
- public void removeImage(Image image) {
- lock.writeLock().lock();
- try {
- allImages.remove(image.getId());
- soneImages.remove(image.getSone().getId(), image);
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- @Override
- public void bookmarkPost(Post post) {
- memoryBookmarkDatabase.bookmarkPost(post);
- }
-
- @Override
- public void unbookmarkPost(Post post) {
- memoryBookmarkDatabase.unbookmarkPost(post);
- }
-
- @Override
- public boolean isPostBookmarked(Post post) {
- return memoryBookmarkDatabase.isPostBookmarked(post);
- }
-
- @Override
- public Set<Post> getBookmarkedPosts() {
- return memoryBookmarkDatabase.getBookmarkedPosts();
- }
-
- //
- // PACKAGE-PRIVATE METHODS
- //
-
- /**
- * Returns whether the given post is known.
- *
- * @param post
- * The post
- * @return {@code true} if the post is known, {@code false} otherwise
- */
- boolean isPostKnown(Post post) {
- lock.readLock().lock();
- try {
- return knownPosts.contains(post.getId());
- } finally {
- lock.readLock().unlock();
- }
- }
-
- /**
- * Sets whether the given post is known.
- *
- * @param post
- * The post
- * @param known
- * {@code true} if the post is known, {@code false} otherwise
- */
- void setPostKnown(Post post, boolean known) {
- lock.writeLock().lock();
- try {
- if (known) {
- knownPosts.add(post.getId());
- } else {
- knownPosts.remove(post.getId());
- }
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- /**
- * Returns whether the given post reply is known.
- *
- * @param postReply
- * The post reply
- * @return {@code true} if the given post reply is known, {@code false}
- * otherwise
- */
- boolean isPostReplyKnown(PostReply postReply) {
- lock.readLock().lock();
- try {
- return knownPostReplies.contains(postReply.getId());
- } finally {
- lock.readLock().unlock();
- }
- }
-
- /**
- * Sets whether the given post reply is known.
- *
- * @param postReply
- * The post reply
- * @param known
- * {@code true} if the post reply is known, {@code false} otherwise
- */
- void setPostReplyKnown(PostReply postReply, boolean known) {
- lock.writeLock().lock();
- try {
- if (known) {
- knownPostReplies.add(postReply.getId());
- } else {
- knownPostReplies.remove(postReply.getId());
- }
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- //
- // PRIVATE METHODS
- //
-
- /**
- * Gets all posts for the given Sone, creating a new collection if there is
- * none yet.
- *
- * @param soneId
- * The ID of the Sone to get the posts for
- * @return All posts
- */
- private Collection<Post> getPostsFrom(String soneId) {
- lock.readLock().lock();
- try {
- return sonePosts.get(soneId);
- } finally {
- lock.readLock().unlock();
- }
- }
-
- /** Loads the known posts. */
- private void loadKnownPosts() {
- Set<String> knownPosts = configurationLoader.loadKnownPosts();
- lock.writeLock().lock();
- try {
- this.knownPosts.clear();
- this.knownPosts.addAll(knownPosts);
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- /**
- * Saves the known posts to the configuration.
- *
- * @throws DatabaseException
- * if a configuration error occurs
- */
- private void saveKnownPosts() throws DatabaseException {
- lock.readLock().lock();
- try {
- int postCounter = 0;
- for (String knownPostId : knownPosts) {
- configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
- }
- configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
- } catch (ConfigurationException ce1) {
- throw new DatabaseException("Could not save database.", ce1);
- } finally {
- lock.readLock().unlock();
- }
- }
-
- /** Loads the known post replies. */
- private void loadKnownPostReplies() {
- Set<String> knownPostReplies = configurationLoader.loadKnownPostReplies();
- lock.writeLock().lock();
- try {
- this.knownPostReplies.clear();
- this.knownPostReplies.addAll(knownPostReplies);
- } finally {
- lock.writeLock().unlock();
- }
- }
-
- /**
- * Saves the known post replies to the configuration.
- *
- * @throws DatabaseException
- * if a configuration error occurs
- */
- private void saveKnownPostReplies() throws DatabaseException {
- lock.readLock().lock();
- try {
- int replyCounter = 0;
- for (String knownReplyId : knownPostReplies) {
- configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
- }
- configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
- } catch (ConfigurationException ce1) {
- throw new DatabaseException("Could not save database.", ce1);
- } finally {
- lock.readLock().unlock();
- }
- }
-
-}
projects / Sone.git / commitdiff