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https://github.com/go-micro/go-micro.git
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3324d140c0
* Rename Namespace to DB, Rename Prefix to table, Remove Suffix Option * Rename options * Rename options * Add store_table option * Table per service, not Database per service
172 lines
4.3 KiB
Go
172 lines
4.3 KiB
Go
package store
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import (
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"context"
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"time"
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)
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// Options contains configuration for the Store
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type Options struct {
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// Nodes contains the addresses or other connection information of the backing storage.
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// For example, an etcd implementation would contain the nodes of the cluster.
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// A SQL implementation could contain one or more connection strings.
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Nodes []string
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// Database allows multiple isolated stores to be kept in one backend, if supported.
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Database string
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// Table is analagous to a table in database backends or a key prefix in KV backends
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Table string
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// Context should contain all implementation specific options, using context.WithValue.
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Context context.Context
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}
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// Option sets values in Options
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type Option func(o *Options)
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// Nodes contains the addresses or other connection information of the backing storage.
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// For example, an etcd implementation would contain the nodes of the cluster.
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// A SQL implementation could contain one or more connection strings.
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func Nodes(a ...string) Option {
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return func(o *Options) {
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o.Nodes = a
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}
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}
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// Database allows multiple isolated stores to be kept in one backend, if supported.
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func Database(db string) Option {
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return func(o *Options) {
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o.Database = db
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}
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}
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// Table is analagous to a table in database backends or a key prefix in KV backends
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func Table(t string) Option {
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return func(o *Options) {
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o.Table = t
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}
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}
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// WithContext sets the stores context, for any extra configuration
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func WithContext(c context.Context) Option {
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return func(o *Options) {
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o.Context = c
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}
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}
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// ReadOptions configures an individual Read operation
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type ReadOptions struct {
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// Prefix returns all records that are prefixed with key
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Prefix bool
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// Suffix returns all records that have the suffix key
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Suffix bool
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// Limit limits the number of returned records
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Limit uint
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// Offset when combined with Limit supports pagination
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Offset uint
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}
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// ReadOption sets values in ReadOptions
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type ReadOption func(r *ReadOptions)
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// ReadPrefix returns all records that are prefixed with key
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func ReadPrefix() ReadOption {
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return func(r *ReadOptions) {
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r.Prefix = true
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}
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}
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// ReadSuffix returns all records that have the suffix key
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func ReadSuffix() ReadOption {
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return func(r *ReadOptions) {
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r.Suffix = true
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}
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}
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// ReadLimit limits the number of responses to l
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func ReadLimit(l uint) ReadOption {
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return func(r *ReadOptions) {
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r.Limit = l
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}
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}
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// ReadOffset starts returning responses from o. Use in conjunction with Limit for pagination
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func ReadOffset(o uint) ReadOption {
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return func(r *ReadOptions) {
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r.Offset = o
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}
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}
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// WriteOptions configures an individual Write operation
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// If Expiry and TTL are set TTL takes precedence
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type WriteOptions struct {
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// Expiry is the time the record expires
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Expiry time.Time
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// TTL is the time until the record expires
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TTL time.Duration
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}
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// WriteOption sets values in WriteOptions
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type WriteOption func(w *WriteOptions)
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// WriteExpiry is the time the record expires
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func WriteExpiry(t time.Time) WriteOption {
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return func(w *WriteOptions) {
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w.Expiry = t
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}
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}
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// WriteTTL is the time the record expires
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func WriteTTL(d time.Duration) WriteOption {
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return func(w *WriteOptions) {
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w.TTL = d
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}
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}
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// DeleteOptions configures an individual Delete operation
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type DeleteOptions struct{}
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// DeleteOption sets values in DeleteOptions
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type DeleteOption func(d *DeleteOptions)
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// ListOptions configures an individual List operation
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type ListOptions struct {
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// Prefix returns all keys that are prefixed with key
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Prefix string
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// Suffix returns all keys that end with key
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Suffix string
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// Limit limits the number of returned keys
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Limit uint
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// Offset when combined with Limit supports pagination
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Offset uint
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}
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// ListOption sets values in ListOptions
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type ListOption func(l *ListOptions)
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// ListPrefix returns all keys that are prefixed with key
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func ListPrefix(p string) ListOption {
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return func(l *ListOptions) {
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l.Prefix = p
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}
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}
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// ListSuffix returns all keys that end with key
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func ListSuffix(s string) ListOption {
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return func(l *ListOptions) {
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l.Suffix = s
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}
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}
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// ListLimit limits the number of returned keys to l
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func ListLimit(l uint) ListOption {
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return func(lo *ListOptions) {
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lo.Limit = l
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}
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}
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// ListOffset starts returning responses from o. Use in conjunction with Limit for pagination.
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func ListOffset(o uint) ListOption {
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return func(l *ListOptions) {
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l.Offset = o
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}
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}
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