content: /**
   * Copyright 1999-2011 Alibaba Group
   *
   * 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.alibaba.cobar.client.datasources;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import javax.sql.DataSource;
  
  import org.apache.commons.lang.Validate;
  import org.springframework.beans.factory.InitializingBean;
  import org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy;
  
  import com.alibaba.cobar.client.datasources.ha.IHADataSourceCreator;
  import com.alibaba.cobar.client.datasources.ha.NonHADataSourceCreator;
  import com.alibaba.cobar.client.datasources.ha.support.IDataSourcePostProcessor;
  import com.alibaba.cobar.client.support.utils.CollectionUtils;
  
  /**
   * StrongRefDataSourceLocator is mainly responsible for assembling data sources
   * mapping relationship as per data source definitions in spring container.
   * 
   * @author fujohnwang
   */
  public class DefaultCobarDataSourceService implements ICobarDataSourceService, InitializingBean {
      private Set<CobarDataSourceDescriptor> dataSourceDescriptors   = new HashSet<CobarDataSourceDescriptor>();
      private List<IDataSourcePostProcessor> dataSourcePostProcessor = new ArrayList<IDataSourcePostProcessor>();
      private IHADataSourceCreator           haDataSourceCreator;
      private Map<String, DataSource>        dataSources             = new HashMap<String, DataSource>();
  
      public Map<String, DataSource> getDataSources() {
          return dataSources;
      }
  
      public void afterPropertiesSet() throws Exception {
          if (getHaDataSourceCreator() == null) {
              setHaDataSourceCreator(new NonHADataSourceCreator());
          }
          if (CollectionUtils.isEmpty(dataSourceDescriptors)) {
              return;
          }
  
          for (CobarDataSourceDescriptor descriptor : getDataSourceDescriptors()) {
              Validate.notEmpty(descriptor.getIdentity());
              Validate.notNull(descriptor.getTargetDataSource());
  
              DataSource dataSourceToUse = descriptor.getTargetDataSource();
  
              if (descriptor.getStandbyDataSource() != null) {
                  dataSourceToUse = getHaDataSourceCreator().createHADataSource(descriptor);
                  if (CollectionUtils.isNotEmpty(dataSourcePostProcessor)) {
                      for (IDataSourcePostProcessor pp : dataSourcePostProcessor) {
                          dataSourceToUse = pp.postProcess(dataSourceToUse);
                      }
                  }
              }
  
              dataSources.put(descriptor.getIdentity(), new LazyConnectionDataSourceProxy(
                      dataSourceToUse));
          }
      }
  
      public void setDataSourceDescriptors(Set<CobarDataSourceDescriptor> dataSourceDescriptors) {
          this.dataSourceDescriptors = dataSourceDescriptors;
      }
  
      public Set<CobarDataSourceDescriptor> getDataSourceDescriptors() {
          return dataSourceDescriptors;
      }
  
      public void setHaDataSourceCreator(IHADataSourceCreator haDataSourceCreator) {
          this.haDataSourceCreator = haDataSourceCreator;
      }
  
      public IHADataSourceCreator getHaDataSourceCreator() {
          return haDataSourceCreator;
      }
  
  }
  