Jeremy Tregunna
4429836929
- Primary nodes will connect to the WAL for observations, start a gRPC server for replication, and shutdown properly - Replica nodes will connect to the primary, apply received entries to local storage, and enforce read-only mode for consistency - Integrates the decision primary/replica/standalone into the kevo cli
43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
package engine
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import (
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"github.com/KevoDB/kevo/pkg/common/log"
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"github.com/KevoDB/kevo/pkg/wal"
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)
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// GetWAL exposes the WAL for replication purposes
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func (e *EngineFacade) GetWAL() *wal.WAL {
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// This is an enhancement to the EngineFacade to support replication
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// It's used by the replication manager to access the WAL
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if e.storage == nil {
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return nil
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}
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// Get WAL from storage manager
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// For now, we'll use type assertion since the interface doesn't
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// have a GetWAL method
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type walProvider interface {
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GetWAL() *wal.WAL
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}
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if provider, ok := e.storage.(walProvider); ok {
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return provider.GetWAL()
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}
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return nil
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}
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// SetReadOnly sets the engine to read-only mode for replicas
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func (e *EngineFacade) SetReadOnly(readOnly bool) {
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// This is an enhancement to the EngineFacade to support replication
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// Setting this will force the engine to reject write operations
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// Used by replicas to ensure they don't accept direct writes
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e.readOnly.Store(readOnly)
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log.Info("Engine read-only mode set to: %v", readOnly)
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}
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// IsReadOnly returns whether the engine is in read-only mode
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func (e *EngineFacade) IsReadOnly() bool {
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return e.readOnly.Load()
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}
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