Jeremy Tregunna
f9e332096c
- Client SDK will connect to a node, get node information and decide if it needs to connect to a primary for writes, or pick a replica to connect to for reads - Updated service with a GetNodeInfo rpc call which returns information about the node to enable the smart selection code in the sdks
63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
package interfaces
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import (
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"errors"
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"github.com/KevoDB/kevo/pkg/common/iterator"
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"github.com/KevoDB/kevo/pkg/stats"
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"github.com/KevoDB/kevo/pkg/wal"
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)
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// Engine defines the core interface for the storage engine
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// This is the primary interface clients will interact with
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type Engine interface {
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// Core operations
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Put(key, value []byte) error
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Get(key []byte) ([]byte, error)
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Delete(key []byte) error
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IsDeleted(key []byte) (bool, error)
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// Iterator access
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GetIterator() (iterator.Iterator, error)
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GetRangeIterator(startKey, endKey []byte) (iterator.Iterator, error)
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// Batch operations
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ApplyBatch(entries []*wal.Entry) error
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// Transaction management
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BeginTransaction(readOnly bool) (Transaction, error)
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// Maintenance operations
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FlushImMemTables() error
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TriggerCompaction() error
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CompactRange(startKey, endKey []byte) error
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// Statistics
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GetStats() map[string]interface{}
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GetCompactionStats() (map[string]interface{}, error)
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// Lifecycle management
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Close() error
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// Read-only mode?
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IsReadOnly() bool
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}
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// Components is a struct containing all the components needed by the engine
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// This allows for dependency injection and easier testing
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type Components struct {
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Storage StorageManager
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TransactionMgr TransactionManager
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CompactionMgr CompactionManager
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StatsCollector stats.Collector
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}
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// Engine related errors
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var (
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// ErrEngineClosed is returned when operations are performed on a closed engine
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ErrEngineClosed = errors.New("engine is closed")
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// ErrKeyNotFound is returned when a key is not found
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ErrKeyNotFound = errors.New("key not found")
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)
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