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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| /* | ||
| * Copyright 2021 Layotto Authors | ||
| * | ||
| * 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 in_memory | ||
|
|
||
| import ( | ||
| "mosn.io/layotto/components/lock" | ||
| "sync" | ||
| "time" | ||
| ) | ||
|
|
||
| type InMemoryLock struct { | ||
| features []lock.Feature | ||
| data *lockMap | ||
| } | ||
|
|
||
| // memoryLock is a lock holder | ||
| type memoryLock struct { | ||
| key string | ||
| owner string | ||
| expireTime time.Time | ||
| lock int | ||
| } | ||
|
|
||
| type lockMap struct { | ||
| sync.Mutex | ||
| locks map[string]*memoryLock | ||
| } | ||
|
|
||
| func NewInMemoryLock() *InMemoryLock { | ||
| return &InMemoryLock{ | ||
| features: make([]lock.Feature, 0), | ||
| data: &lockMap{ | ||
| locks: make(map[string]*memoryLock), | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| func (s *InMemoryLock) Init(_ lock.Metadata) error { | ||
| return nil | ||
| } | ||
|
|
||
| func (s *InMemoryLock) Features() []lock.Feature { | ||
| return s.features | ||
| } | ||
|
|
||
| // Try to add a lock. Currently this is a non-reentrant lock | ||
| func (s *InMemoryLock) TryLock(req *lock.TryLockRequest) (*lock.TryLockResponse, error) { | ||
| s.data.Lock() | ||
| defer s.data.Unlock() | ||
| // 1. Find the memoryLock for this resourceId | ||
| item, ok := s.data.locks[req.ResourceId] | ||
| if !ok { | ||
| item = &memoryLock{ | ||
| key: req.ResourceId, | ||
| //0 unlock, 1 lock | ||
| lock: 0, | ||
| } | ||
| s.data.locks[req.ResourceId] = item | ||
| } | ||
|
|
||
| // 2. Construct a new one if the lockData has expired | ||
| //check expire | ||
| if item.owner != "" && time.Now().After(item.expireTime) { | ||
| item = &memoryLock{ | ||
| key: req.ResourceId, | ||
| lock: 0, | ||
| } | ||
| s.data.locks[req.ResourceId] = item | ||
| } | ||
|
|
||
| // 3. Check if it has been locked by others. | ||
| // Currently this is a non-reentrant lock | ||
| if item.lock == 1 { | ||
| //lock failed | ||
| return &lock.TryLockResponse{ | ||
| Success: false, | ||
| }, nil | ||
| } | ||
|
|
||
| // 4. Update owner information | ||
| item.lock = 1 | ||
| item.owner = req.LockOwner | ||
| item.expireTime = time.Now().Add(time.Second * time.Duration(req.Expire)) | ||
|
|
||
| return &lock.TryLockResponse{ | ||
| Success: true, | ||
| }, nil | ||
| } | ||
|
|
||
| func (s *InMemoryLock) Unlock(req *lock.UnlockRequest) (*lock.UnlockResponse, error) { | ||
| s.data.Lock() | ||
| defer s.data.Unlock() | ||
| // 1. Find the memoryLock for this resourceId | ||
| item, ok := s.data.locks[req.ResourceId] | ||
|
|
||
| if !ok { | ||
| return &lock.UnlockResponse{ | ||
| Status: lock.LOCK_UNEXIST, | ||
| }, nil | ||
| } | ||
| // 2. check the owner information | ||
| if item.lock != 1 { | ||
| return &lock.UnlockResponse{ | ||
| Status: lock.LOCK_UNEXIST, | ||
| }, nil | ||
| } | ||
| if item.owner != req.LockOwner { | ||
| return &lock.UnlockResponse{ | ||
| Status: lock.LOCK_BELONG_TO_OTHERS, | ||
| }, nil | ||
| } | ||
| // 3. unlock and reset the owner information | ||
| item.owner = "" | ||
| item.lock = 0 | ||
| return &lock.UnlockResponse{ | ||
| Status: lock.SUCCESS, | ||
| }, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| /* | ||
| * Copyright 2021 Layotto Authors | ||
| * | ||
| * 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 in_memory | ||
|
|
||
| import ( | ||
| "github.com/stretchr/testify/assert" | ||
| "mosn.io/layotto/components/lock" | ||
| "testing" | ||
| "time" | ||
| ) | ||
|
|
||
| func TestNew(t *testing.T) { | ||
| s := NewInMemoryLock() | ||
| assert.NotNil(t, s) | ||
| } | ||
|
|
||
| func TestInit(t *testing.T) { | ||
| s := NewInMemoryLock() | ||
| assert.NotNil(t, s) | ||
|
|
||
| err := s.Init(lock.Metadata{}) | ||
| assert.NoError(t, err) | ||
| } | ||
|
|
||
| func TestFeatures(t *testing.T) { | ||
| s := NewInMemoryLock() | ||
| assert.NotNil(t, s) | ||
|
|
||
| f := s.Features() | ||
| assert.NotNil(t, f) | ||
| assert.Equal(t, 0, len(f)) | ||
| } | ||
|
|
||
| func TestTryLock(t *testing.T) { | ||
| s := NewInMemoryLock() | ||
| assert.NotNil(t, s) | ||
|
|
||
| req := &lock.TryLockRequest{ | ||
| ResourceId: "key111", | ||
| LockOwner: "own", | ||
| Expire: 3, | ||
| } | ||
|
|
||
| var err error | ||
| var resp *lock.TryLockResponse | ||
| resp, err = s.TryLock(req) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.True(t, resp.Success) | ||
|
|
||
| resp, err = s.TryLock(req) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.False(t, resp.Success) | ||
|
|
||
| req = &lock.TryLockRequest{ | ||
| ResourceId: "key112", | ||
| LockOwner: "own", | ||
| Expire: 1, | ||
| } | ||
|
|
||
| resp, err = s.TryLock(req) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.True(t, resp.Success) | ||
|
|
||
| req = &lock.TryLockRequest{ | ||
| ResourceId: "key112", | ||
| LockOwner: "own", | ||
| Expire: 1, | ||
| } | ||
|
|
||
| resp, err = s.TryLock(req) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.False(t, resp.Success) | ||
|
|
||
| s.data.locks["key112"].expireTime = time.Now().Add(-2 * time.Second) | ||
|
|
||
| resp, err = s.TryLock(req) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.True(t, resp.Success) | ||
|
|
||
| } | ||
|
|
||
| func TestUnLock(t *testing.T) { | ||
| s := NewInMemoryLock() | ||
| assert.NotNil(t, s) | ||
|
|
||
| req := &lock.UnlockRequest{ | ||
| ResourceId: "key111", | ||
| LockOwner: "own", | ||
| } | ||
|
|
||
| var err error | ||
| var resp *lock.UnlockResponse | ||
| resp, err = s.Unlock(req) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.Equal(t, lock.LOCK_UNEXIST, resp.Status) | ||
|
|
||
| lockReq := &lock.TryLockRequest{ | ||
| ResourceId: "key111", | ||
| LockOwner: "own", | ||
| Expire: 10, | ||
| } | ||
|
|
||
| var lockResp *lock.TryLockResponse | ||
| lockResp, err = s.TryLock(lockReq) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.True(t, lockResp.Success) | ||
|
|
||
| resp, err = s.Unlock(req) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.Equal(t, lock.SUCCESS, resp.Status) | ||
|
|
||
| lockResp, err = s.TryLock(lockReq) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.True(t, lockResp.Success) | ||
|
|
||
| req.LockOwner = "1" | ||
|
|
||
| resp, err = s.Unlock(req) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.Equal(t, lock.LOCK_BELONG_TO_OTHERS, resp.Status) | ||
|
|
||
| req.ResourceId = "11" | ||
| lockReq.ResourceId = "11" | ||
| req.LockOwner = "own1" | ||
| lockReq.LockOwner = "own1" | ||
| lockResp, err = s.TryLock(lockReq) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.True(t, lockResp.Success) | ||
|
|
||
| resp, err = s.Unlock(req) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.Equal(t, lock.SUCCESS, resp.Status) | ||
|
|
||
| resp, err = s.Unlock(req) | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, req) | ||
| assert.Equal(t, lock.LOCK_UNEXIST, resp.Status) | ||
|
|
||
| } |
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