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state_machine.go
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state_machine.go
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// Copyright 2019-present Open Networking Foundation.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rsm
import (
streams "github.com/atomix/atomix-go-framework/pkg/atomix/stream"
"io"
)
// StateMachine applies commands from a protocol to a collection of state machines
type StateMachine interface {
// Snapshot writes the state machine snapshot to the given writer
Snapshot(writer io.Writer) error
// Install reads the state machine snapshot from the given reader
Install(reader io.Reader) error
// Command applies a command to the state machine
Command(bytes []byte, stream streams.WriteStream)
// Query applies a query to the state machine
Query(bytes []byte, stream streams.WriteStream)
}