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Refactor command execution to use Locks per target instead of (effectively) one for all commands - towards #317

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Luck 2017-09-04 20:42:21 +01:00
parent 7fe5397e21
commit 03f342a21c
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8 changed files with 165 additions and 57 deletions
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13
common/src/main/java/me/lucko/luckperms/common/commands/CommandManager.java
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@ -71,9 +71,7 @@ import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.CompletableFuture;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
@ -83,14 +81,11 @@ public class CommandManager {
@Getter
private final LuckPermsPlugin plugin;
private final ExecutorService executor;
@Getter
private final List<Command> mainCommands;
public CommandManager(LuckPermsPlugin plugin) {
this.plugin = plugin;
this.executor = Executors.newSingleThreadExecutor();
LocaleManager locale = plugin.getLocaleManager();
@ -129,8 +124,8 @@ public class CommandManager {
* @param label the command label used
* @param args the arguments provided
*/
public Future<CommandResult> onCommand(Sender sender, String label, List<String> args) {
return executor.submit(() -> {
public CompletableFuture<CommandResult> onCommand(Sender sender, String label, List<String> args) {
return CompletableFuture.supplyAsync(() -> {
try {
return execute(sender, label, args);
} catch (Throwable e) {
@ -138,7 +133,7 @@ public class CommandManager {
e.printStackTrace();
return null;
}
});
}, plugin.getScheduler().async());
}
@SuppressWarnings("unchecked")

44
common/src/main/java/me/lucko/luckperms/common/commands/abstraction/MainCommand.java
View File

@ -39,11 +39,14 @@ import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.locks.ReentrantLock;
import java.util.stream.Collectors;
public abstract class MainCommand<T> extends Command<Void, T> {
public abstract class MainCommand<T, I> extends Command<Void, T> {
private final int minArgs; // equals 1 if the command doesn't take a mid argument, e.g. /lp user <USER> sub-command....
// equals 1 if the command doesn't take a mid argument, e.g. /lp log sub-command....
// equals 2 if the command does take a mid argument, e.g. /lp user <USER> sub-command....
private final int minArgs;
public MainCommand(LocalizedSpec spec, String name, int minArgs, List<Command<T, ?>> children) {
super(spec, name, null, Predicates.alwaysFalse(), children);
@ -84,17 +87,28 @@ public abstract class MainCommand<T> extends Command<Void, T> {
}
final String name = args.get(0);
T t = getTarget(name, plugin, sender);
if (t != null) {
CommandResult result;
try {
result = sub.execute(plugin, sender, t, strippedArgs, label);
} catch (CommandException e) {
result = CommandManager.handleException(e, sender, label, sub);
}
I targetId = parseTarget(name, plugin, sender);
if (targetId == null) {
return CommandResult.LOADING_ERROR;
}
cleanup(t, plugin);
return result;
ReentrantLock lock = getLockForTarget(targetId);
lock.lock();
try {
T target = getTarget(targetId, plugin, sender);
if (target != null) {
CommandResult result;
try {
result = sub.execute(plugin, sender, target, strippedArgs, label);
} catch (CommandException e) {
result = CommandManager.handleException(e, sender, label, sub);
}
cleanup(target, plugin);
return result;
}
} finally {
lock.unlock();
}
return CommandResult.LOADING_ERROR;
@ -145,7 +159,11 @@ public abstract class MainCommand<T> extends Command<Void, T> {
protected abstract List<String> getTargets(LuckPermsPlugin plugin);
protected abstract T getTarget(String target, LuckPermsPlugin plugin, Sender sender);
protected abstract I parseTarget(String target, LuckPermsPlugin plugin, Sender sender);
protected abstract ReentrantLock getLockForTarget(I target);
protected abstract T getTarget(I target, LuckPermsPlugin plugin, Sender sender);
protected abstract void cleanup(T t, LuckPermsPlugin plugin);

24
common/src/main/java/me/lucko/luckperms/common/commands/abstraction/SubCommand.java
View File

@ -181,9 +181,11 @@ public abstract class SubCommand<T> extends Command<T, Void> {
user.getRefreshBuffer().requestDirectly();
}
InternalMessagingService messagingService = plugin.getMessagingService();
if (!sender.isImport() && !(messagingService instanceof NoopMessagingService) && plugin.getConfiguration().get(ConfigKeys.AUTO_PUSH_UPDATES)) {
messagingService.getUpdateBuffer().request();
if (!sender.isImport()) {
InternalMessagingService messagingService = plugin.getMessagingService();
if (!(messagingService instanceof NoopMessagingService) && plugin.getConfiguration().get(ConfigKeys.AUTO_PUSH_UPDATES)) {
messagingService.getUpdateBuffer().request();
}
}
if (!success) {
@ -200,9 +202,11 @@ public abstract class SubCommand<T> extends Command<T, Void> {
plugin.getUpdateTaskBuffer().requestDirectly();
}
InternalMessagingService messagingService = plugin.getMessagingService();
if (!sender.isImport() && !(messagingService instanceof NoopMessagingService) && plugin.getConfiguration().get(ConfigKeys.AUTO_PUSH_UPDATES)) {
messagingService.getUpdateBuffer().request();
if (!sender.isImport()) {
InternalMessagingService messagingService = plugin.getMessagingService();
if (!(messagingService instanceof NoopMessagingService) && plugin.getConfiguration().get(ConfigKeys.AUTO_PUSH_UPDATES)) {
messagingService.getUpdateBuffer().request();
}
}
if (!success) {
@ -219,9 +223,11 @@ public abstract class SubCommand<T> extends Command<T, Void> {
plugin.getUpdateTaskBuffer().requestDirectly();
}
InternalMessagingService messagingService = plugin.getMessagingService();
if (!sender.isImport() && !(messagingService instanceof NoopMessagingService) && plugin.getConfiguration().get(ConfigKeys.AUTO_PUSH_UPDATES)) {
messagingService.getUpdateBuffer().request();
if (!sender.isImport()) {
InternalMessagingService messagingService = plugin.getMessagingService();
if (!(messagingService instanceof NoopMessagingService) && plugin.getConfiguration().get(ConfigKeys.AUTO_PUSH_UPDATES)) {
messagingService.getUpdateBuffer().request();
}
}
if (!success) {

27
common/src/main/java/me/lucko/luckperms/common/commands/impl/group/GroupMainCommand.java
View File

@ -25,6 +25,8 @@
package me.lucko.luckperms.common.commands.impl.group;
import com.github.benmanes.caffeine.cache.Caffeine;
import com.github.benmanes.caffeine.cache.LoadingCache;
import com.google.common.collect.ImmutableList;
import me.lucko.luckperms.common.commands.abstraction.Command;
@ -44,8 +46,19 @@ import me.lucko.luckperms.common.plugin.LuckPermsPlugin;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;
public class GroupMainCommand extends MainCommand<Group, String> {
// we use a lock per unique group
// this helps prevent race conditions where commands are being executed concurrently
// and overriding each other.
// it's not a great solution, but it mostly works.
private final LoadingCache<String, ReentrantLock> locks = Caffeine.newBuilder()
.expireAfterAccess(1, TimeUnit.HOURS)
.build(key -> new ReentrantLock());
public class GroupMainCommand extends MainCommand<Group> {
public GroupMainCommand(LocaleManager locale) {
super(CommandSpec.GROUP.spec(locale), "Group", 2, ImmutableList.<Command<Group, ?>>builder()
.add(new GroupInfo(locale))
@ -63,16 +76,19 @@ public class GroupMainCommand extends MainCommand<Group> {
);
}
@Override
protected String parseTarget(String target, LuckPermsPlugin plugin, Sender sender) {
return target.toLowerCase();
}
@Override
protected Group getTarget(String target, LuckPermsPlugin plugin, Sender sender) {
target = target.toLowerCase();
if (!plugin.getStorage().loadGroup(target).join()) {
Message.GROUP_NOT_FOUND.send(sender);
return null;
}
Group group = plugin.getGroupManager().getIfLoaded(target);
if (group == null) {
Message.GROUP_NOT_FOUND.send(sender);
return null;
@ -82,6 +98,11 @@ public class GroupMainCommand extends MainCommand<Group> {
return group;
}
@Override
protected ReentrantLock getLockForTarget(String target) {
return locks.get(target);
}
@Override
protected void cleanup(Group group, LuckPermsPlugin plugin) {

19
common/src/main/java/me/lucko/luckperms/common/commands/impl/log/LogMainCommand.java
View File

@ -39,9 +39,12 @@ import me.lucko.luckperms.common.plugin.LuckPermsPlugin;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.locks.ReentrantLock;
import java.util.stream.Collectors;
public class LogMainCommand extends MainCommand<Log> {
public class LogMainCommand extends MainCommand<Log, Object> {
private final ReentrantLock lock = new ReentrantLock();
public LogMainCommand(LocaleManager locale) {
super(CommandSpec.LOG.spec(locale), "Log", 1, ImmutableList.<Command<Log, ?>>builder()
.add(new LogRecent(locale))
@ -55,7 +58,17 @@ public class LogMainCommand extends MainCommand<Log> {
}
@Override
protected Log getTarget(String target, LuckPermsPlugin plugin, Sender sender) {
protected ReentrantLock getLockForTarget(Object target) {
return lock; // all commands target the same log, so we share a lock between all "targets"
}
@Override
protected Object parseTarget(String target, LuckPermsPlugin plugin, Sender sender) {
return this;
}
@Override
protected Log getTarget(Object target, LuckPermsPlugin plugin, Sender sender) {
Log log = plugin.getStorage().getLog().join();
if (log == null) {
@ -72,7 +85,7 @@ public class LogMainCommand extends MainCommand<Log> {
@Override
protected List<String> getTargets(LuckPermsPlugin plugin) {
return null;
return null; // only used for tab completion in super, and we override this method
}
@Override

20
common/src/main/java/me/lucko/luckperms/common/commands/impl/migration/MigrationMainCommand.java
View File

@ -44,8 +44,9 @@ import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.locks.ReentrantLock;
public class MigrationMainCommand extends MainCommand<Object> {
public class MigrationMainCommand extends MainCommand<Object, Object> {
private static final Map<String, String> PLUGINS = ImmutableMap.<String, String>builder()
.put("org.anjocaido.groupmanager.GroupManager", "me.lucko.luckperms.bukkit.migration.MigrationGroupManager")
.put("ru.tehkode.permissions.bukkit.PermissionsEx", "me.lucko.luckperms.bukkit.migration.MigrationPermissionsEx")
@ -57,6 +58,7 @@ public class MigrationMainCommand extends MainCommand<Object> {
.put("io.github.djxy.permissionmanager.sponge.SpongePlugin", "me.lucko.luckperms.sponge.migration.MigrationPermissionManager")
.build();
private final ReentrantLock lock = new ReentrantLock();
private List<Command<Object, ?>> commands = null;
private boolean display = true;
@ -109,16 +111,26 @@ public class MigrationMainCommand extends MainCommand<Object> {
return l;
}
@Override
protected ReentrantLock getLockForTarget(Object target) {
return lock; // share a lock between all migration commands
}
/* Dummy */
@Override
protected List<String> getTargets(LuckPermsPlugin plugin) {
return Collections.emptyList();
return Collections.emptyList(); // only used for tab complete, we're not bothered about it for this command.
}
@Override
protected Object getTarget(String target, LuckPermsPlugin plugin, Sender sender) {
return new Object();
protected Object parseTarget(String target, LuckPermsPlugin plugin, Sender sender) {
return this; // can't return null, but we don't need a target
}
@Override
protected Object getTarget(Object target, LuckPermsPlugin plugin, Sender sender) {
return this; // can't return null, but we don't need a target
}
@Override

26
common/src/main/java/me/lucko/luckperms/common/commands/impl/track/TrackMainCommand.java
View File

@ -25,6 +25,8 @@
package me.lucko.luckperms.common.commands.impl.track;
import com.github.benmanes.caffeine.cache.Caffeine;
import com.github.benmanes.caffeine.cache.LoadingCache;
import com.google.common.collect.ImmutableList;
import me.lucko.luckperms.common.commands.abstraction.Command;
@ -38,8 +40,19 @@ import me.lucko.luckperms.common.plugin.LuckPermsPlugin;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;
public class TrackMainCommand extends MainCommand<Track, String> {
// we use a lock per unique track
// this helps prevent race conditions where commands are being executed concurrently
// and overriding each other.
// it's not a great solution, but it mostly works.
private final LoadingCache<String, ReentrantLock> locks = Caffeine.newBuilder()
.expireAfterAccess(1, TimeUnit.HOURS)
.build(key -> new ReentrantLock());
public class TrackMainCommand extends MainCommand<Track> {
public TrackMainCommand(LocaleManager locale) {
super(CommandSpec.TRACK.spec(locale), "Track", 2, ImmutableList.<Command<Track, ?>>builder()
.add(new TrackInfo(locale))
@ -53,9 +66,13 @@ public class TrackMainCommand extends MainCommand<Track> {
);
}
@Override
protected String parseTarget(String target, LuckPermsPlugin plugin, Sender sender) {
return target.toLowerCase();
}
@Override
protected Track getTarget(String target, LuckPermsPlugin plugin, Sender sender) {
target = target.toLowerCase();
if (!plugin.getStorage().loadTrack(target).join()) {
Message.TRACK_NOT_FOUND.send(sender);
return null;
@ -70,6 +87,11 @@ public class TrackMainCommand extends MainCommand<Track> {
return track;
}
@Override
protected ReentrantLock getLockForTarget(String target) {
return locks.get(target);
}
@Override
protected void cleanup(Track track, LuckPermsPlugin plugin) {

49
common/src/main/java/me/lucko/luckperms/common/commands/impl/user/UserMainCommand.java
View File

@ -25,6 +25,8 @@
package me.lucko.luckperms.common.commands.impl.user;
import com.github.benmanes.caffeine.cache.Caffeine;
import com.github.benmanes.caffeine.cache.LoadingCache;
import com.google.common.collect.ImmutableList;
import me.lucko.luckperms.common.commands.abstraction.Command;
@ -44,11 +46,23 @@ import me.lucko.luckperms.common.locale.LocaleManager;
import me.lucko.luckperms.common.locale.Message;
import me.lucko.luckperms.common.model.User;
import me.lucko.luckperms.common.plugin.LuckPermsPlugin;
import me.lucko.luckperms.common.references.UserIdentifier;
import java.util.List;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;
public class UserMainCommand extends MainCommand<User, UserIdentifier> {
// we use a lock per unique user
// this helps prevent race conditions where commands are being executed concurrently
// and overriding each other.
// it's not a great solution, but it mostly works.
private final LoadingCache<UUID, ReentrantLock> locks = Caffeine.newBuilder()
.expireAfterAccess(1, TimeUnit.HOURS)
.build(key -> new ReentrantLock());
public class UserMainCommand extends MainCommand<User> {
public UserMainCommand(LocaleManager locale) {
super(CommandSpec.USER.spec(locale), "User", 2, ImmutableList.<Command<User, ?>>builder()
.add(new UserInfo(locale))
@ -66,39 +80,41 @@ public class UserMainCommand extends MainCommand<User> {
}
@Override
protected User getTarget(String target, LuckPermsPlugin plugin, Sender sender) {
UUID u = Util.parseUuid(target.toLowerCase());
if (u == null) {
protected UserIdentifier parseTarget(String target, LuckPermsPlugin plugin, Sender sender) {
UUID uuid = Util.parseUuid(target.toLowerCase());
if (uuid == null) {
if (!DataConstraints.PLAYER_USERNAME_TEST.test(target)) {
Message.USER_INVALID_ENTRY.send(sender, target);
return null;
}
u = plugin.getStorage().getUUID(target.toLowerCase()).join();
if (u == null) {
uuid = plugin.getStorage().getUUID(target.toLowerCase()).join();
if (uuid == null) {
if (!plugin.getConfiguration().get(ConfigKeys.USE_SERVER_UUID_CACHE)) {
Message.USER_NOT_FOUND.send(sender);
return null;
}
u = plugin.lookupUuid(target).orElse(null);
if (u == null) {
uuid = plugin.lookupUuid(target).orElse(null);
if (uuid == null) {
Message.USER_NOT_FOUND.send(sender);
return null;
}
}
}
String name = plugin.getStorage().getName(u).join();
if (name == null) {
name = "null";
}
String name = plugin.getStorage().getName(uuid).join();
return UserIdentifier.of(uuid, name);
}
if (!plugin.getStorage().loadUser(u, name).join()) {
@Override
protected User getTarget(UserIdentifier target, LuckPermsPlugin plugin, Sender sender) {
if (!plugin.getStorage().loadUser(target.getUuid(), target.getUsername().orElse(null)).join()) {
Message.LOADING_ERROR.send(sender);
return null;
}
User user = plugin.getUserManager().getIfLoaded(u);
User user = plugin.getUserManager().getIfLoaded(target.getUuid());
if (user == null) {
Message.LOADING_ERROR.send(sender);
return null;
@ -108,6 +124,11 @@ public class UserMainCommand extends MainCommand<User> {
return user;
}
@Override
protected ReentrantLock getLockForTarget(UserIdentifier target) {
return locks.get(target.getUuid());
}
@Override
protected void cleanup(User user, LuckPermsPlugin plugin) {
plugin.getUserManager().cleanup(user);