How to use

org.apache.shardingsphere.core.metadata.ShardingMetaData

constructor

public ShardingContext(final Map<String, DataSource> dataSourceMap, final ShardingRule shardingRule, final DatabaseType databaseType, final Properties props) throws SQLException {
  this.cachedDatabaseMetaData = createCachedDatabaseMetaData(dataSourceMap);
  this.shardingRule = shardingRule;
  this.databaseType = databaseType;
  
  shardingProperties = new ShardingProperties(null == props ? new Properties() : props);
  int executorSize = shardingProperties.getValue(ShardingPropertiesConstant.EXECUTOR_SIZE);
  executeEngine = new ShardingExecuteEngine(executorSize);
  metaData = new ShardingMetaData(getDataSourceURLs(dataSourceMap), shardingRule, databaseType, executeEngine, new JDBCTableMetaDataConnectionManager(dataSourceMap), 
      shardingProperties.<Integer>getValue(ShardingPropertiesConstant.MAX_CONNECTIONS_SIZE_PER_QUERY), 
      shardingProperties.<Boolean>getValue(ShardingPropertiesConstant.CHECK_TABLE_METADATA_ENABLED));
}

private ShardingMetaData createShardingMetaData(final boolean isCheckingMetaData) {
  return new ShardingMetaData(getDataSourceURLs(getDataSources()), shardingRule, DatabaseType.MySQL, 
      BackendExecutorContext.getInstance().getExecuteEngine(), new ProxyTableMetaDataConnectionManager(getBackendDataSource()), 
      GlobalRegistry.getInstance().getShardingProperties().<Integer>getValue(ShardingPropertiesConstant.MAX_CONNECTIONS_SIZE_PER_QUERY), isCheckingMetaData);
}

private ShardingMetaData createShardingMetaData(final boolean isCheckingMetaData) {
  return new ShardingMetaData(getDataSourceURLs(getDataSources()), shardingRule, DatabaseType.PostgreSQL,
      BackendExecutorContext.getInstance().getExecuteEngine(), new ProxyTableMetaDataConnectionManager(getBackendDataSource()), 
      GlobalRegistry.getInstance().getShardingProperties().<Integer>getValue(ShardingPropertiesConstant.MAX_CONNECTIONS_SIZE_PER_QUERY), isCheckingMetaData);
}

private ShardingMetaData createShardingMetaData() {
  return new ShardingMetaData(getDataSourceURLs(getDataSources()), new ShardingRule(new ShardingRuleConfiguration(), getDataSources().keySet()), 
      DatabaseType.PostgreSQL, BackendExecutorContext.getInstance().getExecuteEngine(), new ProxyTableMetaDataConnectionManager(getBackendDataSource()),
      GlobalRegistry.getInstance().getShardingProperties().<Integer>getValue(ShardingPropertiesConstant.MAX_CONNECTIONS_SIZE_PER_QUERY), 
      GlobalRegistry.getInstance().getShardingProperties().<Boolean>getValue(ShardingPropertiesConstant.CHECK_TABLE_METADATA_ENABLED));
}

private ShardingMetaData createShardingMetaData() {
  return new ShardingMetaData(getDataSourceURLs(getDataSources()), new ShardingRule(new ShardingRuleConfiguration(), getDataSources().keySet()), 
      DatabaseType.MySQL, BackendExecutorContext.getInstance().getExecuteEngine(), new ProxyTableMetaDataConnectionManager(getBackendDataSource()), 
      GlobalRegistry.getInstance().getShardingProperties().<Integer>getValue(ShardingPropertiesConstant.MAX_CONNECTIONS_SIZE_PER_QUERY), 
      GlobalRegistry.getInstance().getShardingProperties().<Boolean>getValue(ShardingPropertiesConstant.CHECK_TABLE_METADATA_ENABLED));
}