info.archinnov.achilles.context.CQLDaoContextBuilder Maven / Gradle / Ivy

/**
 *
 * Copyright (C) 2012-2013 DuyHai DOAN
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package info.archinnov.achilles.context;

import static info.archinnov.achilles.entity.metadata.EntityMeta.*;
import info.archinnov.achilles.counter.AchillesCounter.CQLQueryType;
import info.archinnov.achilles.entity.metadata.EntityMeta;
import info.archinnov.achilles.statement.cache.StatementCacheKey;
import info.archinnov.achilles.statement.prepared.CQLPreparedStatementGenerator;

import java.util.HashMap;
import java.util.Map;

import com.datastax.driver.core.PreparedStatement;
import com.datastax.driver.core.Session;
import com.google.common.base.Function;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.google.common.collect.Maps;

public class CQLDaoContextBuilder {
	private static final Integer PREPARED_STATEMENT_LRU_CACHE_SIZE = 5000;
	private CQLPreparedStatementGenerator queryGenerator = new CQLPreparedStatementGenerator();
	private Session session;

	private Function insertPSTransformer = new Function() {
		@Override
		public PreparedStatement apply(EntityMeta meta) {
			return queryGenerator.prepareInsertPS(session, meta);
		}
	};

	private Function selectEagerPSTransformer = new Function() {
		@Override
		public PreparedStatement apply(EntityMeta meta) {
			return queryGenerator.prepareSelectEagerPS(session, meta);
		}
	};

	private Function> removePSTransformer = new Function>() {
		@Override
		public Map apply(EntityMeta meta) {
			return queryGenerator.prepareRemovePSs(session, meta);
		}

	};

	private Function> clusteredCounterTransformer = new Function>() {
		@Override
		public Map apply(EntityMeta meta) {
			return queryGenerator.prepareClusteredCounterQueryMap(session, meta);
		}
	};

	public static CQLDaoContextBuilder builder(Session session) {
		return new CQLDaoContextBuilder(session);
	}

	public CQLDaoContextBuilder(Session session) {
		this.session = session;
	}

	public CQLDaoContext build(Map, EntityMeta> entityMetaMap, boolean hasSimpleCounter) {
		Map, PreparedStatement> insertPSMap = new HashMap, PreparedStatement>(Maps.transformValues(
				Maps.filterValues(entityMetaMap, excludeClusteredCounterFilter), insertPSTransformer));

		Map, PreparedStatement> selectEagerPSMap = new HashMap, PreparedStatement>(
				Maps.transformValues(entityMetaMap, selectEagerPSTransformer));

		Map, Map> removePSMap = new HashMap, Map>(
				Maps.transformValues(entityMetaMap, removePSTransformer));

		Cache dynamicPSCache = CacheBuilder.newBuilder()
				.maximumSize(PREPARED_STATEMENT_LRU_CACHE_SIZE).build();

		Map counterQueryMap;
		if (hasSimpleCounter) {
			counterQueryMap = queryGenerator.prepareSimpleCounterQueryMap(session);
		} else {
			counterQueryMap = new HashMap();
		}

		Map, Map> clusteredCounterQueriesMap = new HashMap, Map>(
				Maps.transformValues(Maps.filterValues(entityMetaMap, clusteredCounterFilter),
						clusteredCounterTransformer));

		return new CQLDaoContext(insertPSMap, dynamicPSCache, selectEagerPSMap, removePSMap, counterQueryMap,
				clusteredCounterQueriesMap, session);
	}
}