Java tutorial
/* * MongoWP * Copyright 2014 8Kdata Technology (www.8kdata.com) * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.eightkdata.mongowp.bson.netty.pool; import com.eightkdata.mongowp.bson.netty.annotations.ConservesIndexes; import com.eightkdata.mongowp.bson.netty.annotations.Tight; import com.google.common.base.Charsets; import io.netty.buffer.ByteBuf; import javax.annotation.concurrent.ThreadSafe; import javax.inject.Inject; /** * */ @ThreadSafe public abstract class StringPool { private final StringPoolPolicy heuristic; @Inject public StringPool(StringPoolPolicy heuristic) { this.heuristic = heuristic; } protected static String getString(@Tight @ConservesIndexes ByteBuf stringBuf) { return stringBuf.toString(Charsets.UTF_8); } public String fromPool(boolean likelyCacheable, @Tight @ConservesIndexes ByteBuf stringBuf) { if (!heuristic.apply(likelyCacheable, stringBuf)) { return getString(stringBuf); } return retrieveFromPool(stringBuf); } protected abstract String retrieveFromPool(@Tight @ConservesIndexes ByteBuf stringBuf); }