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Add a cache uuid service

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This commit is contained in:
Alexander Söderberg 2020-05-17 23:57:40 +02:00
parent 67bf90e92f
commit 12f2cb0d58
1 changed files with 76 additions and 0 deletions
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Core/src/main/java/com/plotsquared/core/uuid/CacheUUIDService.java Normal file
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/*
* _____ _ _ _____ _
* | __ \| | | | / ____| | |
* | |__) | | ___ | |_| (___ __ _ _ _ __ _ _ __ ___ __| |
* | ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
* | | | | (_) | |_ ____) | (_| | |_| | (_| | | | __/ (_| |
* |_| |_|\___/ \__|_____/ \__, |\__,_|\__,_|_| \___|\__,_|
* | |
* |_|
* PlotSquared plot management system for Minecraft
* Copyright (C) 2020 IntellectualSites
*
* 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 com.plotsquared.core.uuid;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import org.jetbrains.annotations.NotNull;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import java.util.function.Consumer;
/**
* UUID service backed by a Guava Cache
*/
public class CacheUUIDService implements UUIDService, Consumer<List<UUIDMapping>> {
private final Cache<String, UUIDMapping> usernameCache;
private final Cache<UUID, UUIDMapping> uuidCache;
/**
* Construct a new Cache UUID service with a maximum number of entries.
* Because it stores the mappings in two ways, the actual number
* of entries is two times the specified size
*
* @param size Maximum number of entries
*/
public CacheUUIDService(final int size) {
this.usernameCache = CacheBuilder.newBuilder().maximumSize(size).build();
this.uuidCache = CacheBuilder.newBuilder().maximumSize(size).build();
}
@Override @NotNull public List<UUIDMapping> getNames(@NotNull final List<UUID> uuids) {
final List<UUIDMapping> mappings = new ArrayList<>(uuids.size());
mappings.addAll(this.uuidCache.getAllPresent(uuids).values());
return mappings;
}
@Override @NotNull public List<UUIDMapping> getUUIDs(@NotNull final List<String> usernames) {
final List<UUIDMapping> mappings = new ArrayList<>(usernames.size());
mappings.addAll(this.usernameCache.getAllPresent(usernames).values());
return mappings;
}
@Override public void accept(final List<UUIDMapping> uuidMappings) {
for (final UUIDMapping mapping : uuidMappings) {
this.uuidCache.put(mapping.getUuid(), mapping);
this.usernameCache.put(mapping.getUsername(), mapping);
}
}
}