github.com/willyham/dosa@v2.3.1-0.20171024181418-1e446d37ee71+incompatible/connectors/cassandra/cluster.go (about)

     1  // Copyright (c) 2017 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package cassandra
    22  
    23  import (
    24  	"github.com/gocql/gocql"
    25  	"github.com/pkg/errors"
    26  )
    27  
    28  // Cluster contains the cluster configuration and session info
    29  type Cluster struct {
    30  	config  gocql.ClusterConfig
    31  	session *gocql.Session
    32  }
    33  
    34  // NewCluster creates a Cluster instance based on config
    35  func NewCluster(config gocql.ClusterConfig) (*Cluster, error) {
    36  	session, err := config.CreateSession()
    37  	if err != nil {
    38  		return nil, errors.Wrap(err, "failed to create session to Cassandra")
    39  	}
    40  
    41  	return &Cluster{
    42  		config:  config,
    43  		session: session,
    44  	}, nil
    45  }
    46  
    47  // Close closes the session to cassandra
    48  func (c *Cluster) Close() {
    49  	c.session.Close()
    50  }