79 lines
2.7 KiB
Go
79 lines
2.7 KiB
Go
package config
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import "fmt"
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// Defined Kafka topics.
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const (
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TopicOutputTypingEvent = "OutputTypingEvent"
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TopicOutputSendToDeviceEvent = "OutputSendToDeviceEvent"
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TopicOutputKeyChangeEvent = "OutputKeyChangeEvent"
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TopicOutputRoomEvent = "OutputRoomEvent"
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TopicOutputClientData = "OutputClientData"
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TopicOutputReceiptEvent = "OutputReceiptEvent"
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)
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// KafkaTopics is a convenience slice to access all defined Kafka topics.
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var KafkaTopics = []string{
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TopicOutputTypingEvent,
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TopicOutputSendToDeviceEvent,
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TopicOutputKeyChangeEvent,
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TopicOutputRoomEvent,
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TopicOutputClientData,
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TopicOutputReceiptEvent,
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}
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type Kafka struct {
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// A list of kafka/NATS addresses to connect to.
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Addresses []string `yaml:"addresses"`
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// The prefix to use for Kafka topic names for this homeserver - really only
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// useful if running more than one Dendrite on the same Kafka deployment.
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TopicPrefix string `yaml:"topic_prefix"`
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// Whether to use naffka instead of kafka.
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// Naffka can only be used when running dendrite as a single monolithic server.
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// Kafka can be used both with a monolithic server and when running the
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// components as separate servers.
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UseNaffka bool `yaml:"use_naffka"`
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// The Naffka database is used internally by the naffka library, if used.
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Database DatabaseOptions `yaml:"naffka_database"`
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// The max size a Kafka message passed between consumer/producer can have
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// Equals roughly max.message.bytes / fetch.message.max.bytes in Kafka
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MaxMessageBytes *int `yaml:"max_message_bytes"`
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// Whether to use NATS instead of kafka/naffka
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UseNATS bool `yaml:"use_nats"`
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}
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func (k *Kafka) TopicFor(name string) string {
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return fmt.Sprintf("%s%s", k.TopicPrefix, name)
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}
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func (c *Kafka) Defaults() {
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c.UseNaffka = true
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c.Database.Defaults()
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if c.UseNATS {
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c.UseNaffka = false
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c.Addresses = []string{"nats://127.0.0.1:4222"}
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} else {
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c.Addresses = []string{"localhost:2181"}
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}
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c.Database.ConnectionString = DataSource("file:naffka.db")
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c.TopicPrefix = "Dendrite"
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maxBytes := 1024 * 1024 * 8 // about 8MB
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c.MaxMessageBytes = &maxBytes
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}
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func (c *Kafka) Verify(configErrs *ConfigErrors, isMonolith bool) {
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if c.UseNaffka {
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if !isMonolith {
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configErrs.Add("naffka can only be used in a monolithic server")
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}
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checkNotEmpty(configErrs, "global.kafka.database.connection_string", string(c.Database.ConnectionString))
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} else {
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// If we aren't using naffka then we need to have at least one kafka/nats
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// server to talk to.
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checkNotZero(configErrs, "global.kafka.addresses", int64(len(c.Addresses)))
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}
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checkNotEmpty(configErrs, "global.kafka.topic_prefix", string(c.TopicPrefix))
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checkPositive(configErrs, "global.kafka.max_message_bytes", int64(*c.MaxMessageBytes))
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}
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