go.temporal.io/server@v1.23.0/common/persistence/cassandra/helpers.go (about)

     1  // The MIT License
     2  //
     3  // Copyright (c) 2020 Temporal Technologies Inc.  All rights reserved.
     4  //
     5  // Copyright (c) 2020 Uber Technologies, Inc.
     6  //
     7  // Permission is hereby granted, free of charge, to any person obtaining a copy
     8  // of this software and associated documentation files (the "Software"), to deal
     9  // in the Software without restriction, including without limitation the rights
    10  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    11  // copies of the Software, and to permit persons to whom the Software is
    12  // furnished to do so, subject to the following conditions:
    13  //
    14  // The above copyright notice and this permission notice shall be included in
    15  // all copies or substantial portions of the Software.
    16  //
    17  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    18  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    19  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    20  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    21  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    22  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    23  // THE SOFTWARE.
    24  
    25  package cassandra
    26  
    27  import (
    28  	"fmt"
    29  
    30  	"go.temporal.io/server/common/log"
    31  	"go.temporal.io/server/common/log/tag"
    32  	"go.temporal.io/server/common/persistence/nosql/nosqlplugin/cassandra/gocql"
    33  )
    34  
    35  const cassandraPersistenceName = "cassandra"
    36  
    37  // CreateCassandraKeyspace creates the keyspace using this session for given replica count
    38  func CreateCassandraKeyspace(s gocql.Session, keyspace string, replicas int, overwrite bool, logger log.Logger) (err error) {
    39  	// if overwrite flag is set, drop the keyspace and create a new one
    40  	if overwrite {
    41  		err = DropCassandraKeyspace(s, keyspace, logger)
    42  		if err != nil {
    43  			logger.Error("drop keyspace error", tag.Error(err))
    44  			return
    45  		}
    46  	}
    47  	err = s.Query(fmt.Sprintf(`CREATE KEYSPACE IF NOT EXISTS %s WITH replication = {
    48  		'class' : 'SimpleStrategy', 'replication_factor' : %d}`, keyspace, replicas)).Exec()
    49  	if err != nil {
    50  		logger.Error("create keyspace error", tag.Error(err))
    51  		return
    52  	}
    53  	logger.Debug("created keyspace", tag.Value(keyspace))
    54  
    55  	return
    56  }
    57  
    58  // DropCassandraKeyspace drops the given keyspace, if it exists
    59  func DropCassandraKeyspace(s gocql.Session, keyspace string, logger log.Logger) (err error) {
    60  	err = s.Query(fmt.Sprintf("DROP KEYSPACE IF EXISTS %s", keyspace)).Exec()
    61  	if err != nil {
    62  		logger.Error("drop keyspace error", tag.Error(err))
    63  		return
    64  	}
    65  	logger.Debug("dropped keyspace", tag.Value(keyspace))
    66  	return
    67  }