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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| // Copyright © 2022 Vincenzo Marchese <vincenzo.marchese@gmail.com> | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in | ||
| // all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| // THE SOFTWARE. | ||
| package cassandra | ||
|
|
||
| type Config struct { | ||
| Hosts []string `json:"hosts"` | ||
| Timeout string `json:"timeout"` | ||
| Keyspace string `json:"keyspace"` | ||
| Table string `json:"table"` | ||
| ConsistencyLevel string `json:"consistencyLevel"` | ||
| Username string `json:"username"` | ||
| Password string `json:"password"` | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| { | ||
| "hosts":["host1:port1","host2:port2",...], | ||
| "keyspace": "<keyspacename>", | ||
| "table":"<table_name>", | ||
| "username": "<username>", | ||
| "password": "<password>", | ||
| "timeout": "<timeout>", | ||
| "consistencyLevel": "<consistencyLevel>" | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| // Copyright © 2022 Vincenzo Marchese <vincenzo.marchese@gmail.com> | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in | ||
| // all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| // THE SOFTWARE. | ||
| package cassandra | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "os" | ||
| "time" | ||
|
|
||
| "github.com/gocql/gocql" | ||
| "github.com/rs/zerolog/log" | ||
| ) | ||
|
|
||
| type Producer struct { | ||
| configuration Config | ||
|
|
||
| session *gocql.Session | ||
| consistencyLevel gocql.Consistency | ||
| timeout time.Duration | ||
| } | ||
|
|
||
| func (p *Producer) Initialize(configFile string) { | ||
| cfgBytes, err := os.ReadFile(configFile) | ||
| if err != nil { | ||
| log.Fatal().Err(err).Msg("Failed to read config file") | ||
| } | ||
|
|
||
| config := Config{} | ||
| if err := json.Unmarshal(cfgBytes, &config); err != nil { | ||
| log.Fatal().Err(err).Msg("Failed to unmarshal config") | ||
| } | ||
|
|
||
| if config.Keyspace == "" { | ||
| log.Fatal().Msg("Keyspace is required") | ||
| } | ||
|
|
||
| if len(config.Hosts) == 0 { | ||
| log.Fatal().Msg("Hosts are required") | ||
| } | ||
|
|
||
| if config.Username == "" || config.Password == "" { | ||
| log.Fatal().Msg("Username and password are both required") | ||
| } | ||
|
|
||
| if config.ConsistencyLevel == "" { | ||
| config.ConsistencyLevel = "QUORUM" | ||
| } | ||
|
|
||
| consistencyLevel, err := gocql.MustParseConsistency(config.ConsistencyLevel) | ||
| if err != nil { | ||
| log.Fatal().Err(err).Msg("Failed to parse consistency level") | ||
| } | ||
|
|
||
| if config.Timeout == "" { | ||
| config.Timeout = "10s" | ||
| } | ||
|
|
||
| timeout, err := time.ParseDuration(config.Timeout) | ||
| if err != nil { | ||
| log.Warn().Err(err).Msg("Failed to parse timeout, setting default to 10s") | ||
| timeout = time.Second * 10 | ||
| } | ||
|
|
||
| cluster := gocql.NewCluster(config.Hosts...) | ||
| cluster.Authenticator = gocql.PasswordAuthenticator{ | ||
| Username: config.Username, | ||
| Password: config.Password, | ||
| } | ||
| session, err := cluster.CreateSession() | ||
| if err != nil { | ||
| log.Fatal().Err(err).Msg("Failed to create session") | ||
| } | ||
|
|
||
| p.configuration = config | ||
| p.timeout = timeout | ||
| p.session = session | ||
| p.consistencyLevel = consistencyLevel | ||
|
|
||
| } | ||
|
|
||
| func (p *Producer) Produce(_ []byte, v []byte, _ any) { | ||
|
|
||
| stmt := fmt.Sprintf("INSERT INTO %s.%s JSON ?", | ||
| p.configuration.Keyspace, | ||
| p.configuration.Table) | ||
| if err := p.session.Query(stmt, string(v)). | ||
| Consistency(p.consistencyLevel).Exec(); err != nil { | ||
| log.Fatal().Err(err).Msg("Failed to execute query") | ||
| } | ||
| } | ||
|
|
||
| func (p *Producer) Close() error { | ||
| p.session.Close() | ||
| return nil | ||
| } |