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https://github.com/mainflux/mainflux.git
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880e193b0a
* Implement errors package in senml transformer, readers and writers Signed-off-by: Ivan Milošević <iva@blokovi.com> * Remove unused const Return wrapped error in postgres writer Signed-off-by: Ivan Milošević <iva@blokovi.com> * fix default db host in postgres writer Signed-off-by: Ivan Milošević <iva@blokovi.com> * fix capital letters in errors messages Signed-off-by: Ivan Milošević <iva@blokovi.com> * use svcName instead of postgres for Promethius initialization Signed-off-by: Ivan Milošević <iva@blokovi.com>
44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
// Copyright (c) Mainflux
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// SPDX-License-Identifier: Apache-2.0
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package cassandra
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import (
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"github.com/gocql/gocql"
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"github.com/mainflux/mainflux/errors"
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"github.com/mainflux/mainflux/transformers/senml"
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"github.com/mainflux/mainflux/writers"
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)
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var errSaveMessage = errors.New("faled to save message to cassandra database")
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var _ writers.MessageRepository = (*cassandraRepository)(nil)
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type cassandraRepository struct {
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session *gocql.Session
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}
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// New instantiates Cassandra message repository.
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func New(session *gocql.Session) writers.MessageRepository {
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return &cassandraRepository{session}
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}
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func (cr *cassandraRepository) Save(messages ...senml.Message) error {
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cql := `INSERT INTO messages (id, channel, subtopic, publisher, protocol,
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name, unit, value, string_value, bool_value, data_value, sum,
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time, update_time)
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VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`
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id := gocql.TimeUUID()
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for _, msg := range messages {
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err := cr.session.Query(cql, id, msg.Channel, msg.Subtopic, msg.Publisher,
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msg.Protocol, msg.Name, msg.Unit, msg.Value, msg.StringValue,
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msg.BoolValue, msg.DataValue, msg.Sum, msg.Time, msg.UpdateTime).Exec()
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if err != nil {
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return errors.Wrap(errSaveMessage, err)
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}
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}
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return nil
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}
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