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Remove unused EditSessionHolder class.

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wizjany 2020-01-07 18:05:35 -05:00
parent 993e49b1ab
commit da98b5fe15
1 changed files with 0 additions and 87 deletions
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worldedit-core/src/main/java/com/sk89q/worldedit/command/argument/EditSessionHolder.java
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/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.command.argument;
import com.sk89q.worldedit.EditSession;
import com.sk89q.worldedit.LocalSession;
import com.sk89q.worldedit.WorldEdit;
import com.sk89q.worldedit.entity.Player;
import java.util.concurrent.locks.StampedLock;
/**
* Lazily-created {@link EditSession}.
*/
public class EditSessionHolder {
private final StampedLock lock = new StampedLock();
private final WorldEdit worldEdit;
private final Player player;
public EditSessionHolder(WorldEdit worldEdit, Player player) {
this.worldEdit = worldEdit;
this.player = player;
}
private EditSession session;
/**
* Get the session, but does not create it if it doesn't exist.
*/
public EditSession getSession() {
long stamp = lock.tryOptimisticRead();
EditSession result = session;
if (!lock.validate(stamp)) {
stamp = lock.readLock();
try {
result = session;
} finally {
lock.unlockRead(stamp);
}
}
return result;
}
public EditSession getOrCreateSession() {
// use the already-generated result if possible
EditSession result = getSession();
if (result != null) {
return result;
}
// otherwise, acquire write lock
long stamp = lock.writeLock();
try {
// check session field again -- maybe another writer hit it in between
result = session;
if (result != null) {
return result;
}
// now we can do the actual creation
LocalSession localSession = worldEdit.getSessionManager().get(player);
EditSession editSession = localSession.createEditSession(player);
editSession.enableStandardMode();
localSession.tellVersion(player);
return session = editSession;
} finally {
lock.unlockWrite(stamp);
}
}
}