com.dangdang.ddframe.rdb.sharding.config.yaml.api.YamlShardingDataSource Maven / Gradle / Ivy
/*
* Copyright 1999-2015 dangdang.com.
*
* 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 com.dangdang.ddframe.rdb.sharding.config.yaml.api;
import com.dangdang.ddframe.rdb.sharding.config.common.api.ShardingRuleBuilder;
import com.dangdang.ddframe.rdb.sharding.config.yaml.internel.YamlConfig;
import com.dangdang.ddframe.rdb.sharding.jdbc.core.datasource.ShardingDataSource;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;
import javax.sql.DataSource;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Map;
/**
* 基于配置文件的分片规则.
*
* @author gaohongtao
*/
public class YamlShardingDataSource extends ShardingDataSource {
public YamlShardingDataSource(final File yamlFile) throws IOException {
super(new ShardingRuleBuilder(yamlFile.getName(), unmarshal(yamlFile)).build(), unmarshal(yamlFile).getProps());
}
public YamlShardingDataSource(final Map dataSource, final File yamlFile) throws IOException {
super(new ShardingRuleBuilder(yamlFile.getName(), dataSource, unmarshal(yamlFile)).build(), unmarshal(yamlFile).getProps());
}
private static YamlConfig unmarshal(final File yamlFile) throws IOException {
try (
FileInputStream fileInputStream = new FileInputStream(yamlFile);
InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, "UTF-8")
) {
return new Yaml(new Constructor(YamlConfig.class)).loadAs(inputStreamReader, YamlConfig.class);
}
}
}