mirror of
https://github.com/gogrlx/nats-server.git
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dd116fcfd4
This is the first checkin for JetStream. Has some rudimentary basics working. TODO 1. Push vs pull mode for observables. (work queues) 2. Disk/File store, memory only for now. 3. clustering code - design shaping up well. 4. Finalize account import semantics. 5. Lots of other little things. Signed-off-by: Derek Collison <derek@nats.io>
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
// Copyright 2019 The NATS Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package server
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import (
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"errors"
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"time"
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)
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// StorageType determines how messages are stored for retention.
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type StorageType int
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const (
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// Memory specifies in memory only.
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MemoryStorage StorageType = iota
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// Disk specifies on disk, designated by the JetStream config StoreDir.
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DiskStorage
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)
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type MsgSetStore interface {
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StoreMsg(subj string, msg []byte) (uint64, error)
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Lookup(seq uint64) (subj string, msg []byte, ts int64, err error)
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GetSeqFromTime(t time.Time) uint64
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Stats() MsgSetStats
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}
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// MsgSetStats are stats about this given message set.
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type MsgSetStats struct {
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Msgs uint64
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Bytes uint64
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FirstSeq uint64
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LastSeq uint64
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}
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var (
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ErrStoreMsgNotFound = errors.New("no message found")
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)
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