60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
package storage
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import (
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"errors"
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)
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const (
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DefaultMaximumNumberOfResults = 100
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DefaultMaximumNumberOfEvents = 50
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)
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var (
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ErrSQLStorageRequiresPath = errors.New("sql storage requires a non-empty path to be defined")
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ErrMemoryStorageDoesNotSupportPath = errors.New("memory storage does not support persistence, use sqlite if you want persistence on file")
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)
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// Config is the configuration for storage
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type Config struct {
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// Path is the path used by the store to achieve persistence
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// If blank, persistence is disabled.
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// Note that not all Type support persistence
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Path string `yaml:"path"`
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// Type of store
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// If blank, uses the default in-memory store
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Type Type `yaml:"type"`
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// Caching is whether to enable caching.
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// This is used to drastically decrease read latency by pre-emptively caching writes
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// as they happen, also known as the write-through caching strategy.
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// Does not apply if Config.Type is not TypePostgres or TypeSQLite.
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Caching bool `yaml:"caching,omitempty"`
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// MaximumNumberOfResults is the number of results each endpoint should be able to provide
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MaximumNumberOfResults int `yaml:"maximum-number-of-results,omitempty"`
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// MaximumNumberOfEvents is the number of events each endpoint should be able to provide
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MaximumNumberOfEvents int `yaml:"maximum-number-of-events,omitempty"`
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}
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// ValidateAndSetDefaults validates the configuration and sets the default values (if applicable)
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func (c *Config) ValidateAndSetDefaults() error {
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if c.Type == "" {
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c.Type = TypeMemory
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}
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if (c.Type == TypePostgres || c.Type == TypeSQLite) && len(c.Path) == 0 {
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return ErrSQLStorageRequiresPath
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}
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if c.Type == TypeMemory && len(c.Path) > 0 {
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return ErrMemoryStorageDoesNotSupportPath
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}
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if c.MaximumNumberOfResults <= 0 {
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c.MaximumNumberOfResults = DefaultMaximumNumberOfResults
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}
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if c.MaximumNumberOfEvents <= 0 {
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c.MaximumNumberOfEvents = DefaultMaximumNumberOfEvents
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}
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return nil
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}
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