wehub-resource-sync
e071084ebe
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42 lines
1.6 KiB
Go
42 lines
1.6 KiB
Go
package store
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// Scope returns a Store that confines every operation to the given
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// database and table of s, without mutating s. It is the safe way to give
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// each component — a service, an agent, a flow — its own table over a
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// shared backend: unlike Init(Table(...)), which changes process-global
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// options and so races between co-located components, a scoped handle
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// injects the database/table on each call.
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//
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// An empty database or table falls through to the underlying store's
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// default for that field.
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//
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// st := store.Scope(store.DefaultStore, "agent", "task-mgr")
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// st.Write(&store.Record{Key: "history", Value: data}) // -> agent/task-mgr
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func Scope(s Store, database, table string) Store {
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return &scopedStore{Store: s, database: database, table: table}
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}
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// scopedStore applies a fixed database/table to every data operation,
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// delegating everything else to the embedded Store.
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type scopedStore struct {
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Store
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database string
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table string
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}
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func (s *scopedStore) Read(key string, opts ...ReadOption) ([]*Record, error) {
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return s.Store.Read(key, append([]ReadOption{ReadFrom(s.database, s.table)}, opts...)...)
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}
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func (s *scopedStore) Write(r *Record, opts ...WriteOption) error {
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return s.Store.Write(r, append([]WriteOption{WriteTo(s.database, s.table)}, opts...)...)
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}
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func (s *scopedStore) Delete(key string, opts ...DeleteOption) error {
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return s.Store.Delete(key, append([]DeleteOption{DeleteFrom(s.database, s.table)}, opts...)...)
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}
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func (s *scopedStore) List(opts ...ListOption) ([]string, error) {
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return s.Store.List(append([]ListOption{ListFrom(s.database, s.table)}, opts...)...)
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}
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