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feat: add re-entry and automatic renewal for redis lock (#150)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| package lock | ||
|
|
||
| var ( | ||
| // lockscript lua script for acrequire a lock | ||
| lockLuaScript = ` | ||
| if redis.call("GET", KEYS[1]) == ARGV[1] then | ||
| redis.call("SET", KEYS[1], ARGV[1], "PX", ARGV[2]) | ||
| return "OK" | ||
| else | ||
| return redis.call("SET", KEYS[1], ARGV[1], "NX", "PX", ARGV[2]) | ||
| end | ||
| ` | ||
|
|
||
| // unlockscript lua script for release a lock | ||
| unlockLuaScript = ` | ||
| if redis.call("GET", KEYS[1]) == ARGV[1] then | ||
| return redis.call("DEL", KEYS[1]) | ||
| else | ||
| return 0 | ||
| end | ||
| ` | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| package lock_test | ||
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| import ( | ||
| "context" | ||
| "testing" | ||
| "time" | ||
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||
| "github.com/alicebob/miniredis/v2" | ||
| "github.com/go-eagle/eagle/pkg/lock" | ||
| "github.com/redis/go-redis/v9" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
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| func TestRedisLock(t *testing.T) { | ||
| // Set up a miniredis server | ||
| s, err := miniredis.Run() | ||
| if err != nil { | ||
| t.Fatalf("failed to start miniredis: %v", err) | ||
| } | ||
| defer s.Close() | ||
|
|
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| // Create a Redis client | ||
| rdb := redis.NewClient(&redis.Options{ | ||
| Addr: s.Addr(), | ||
| }) | ||
|
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| ctx := context.Background() | ||
|
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| // Test acquiring the lock | ||
| l := lock.NewRedisLock(rdb, "test-key", 5*time.Second) | ||
| locked, err := l.Lock(ctx) | ||
| assert.NoError(t, err, "expected no error on acquiring lock") | ||
| assert.True(t, locked, "expected to successfully acquire the lock") | ||
|
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||
| // Test re-acquiring the lock | ||
| lockedAgain, err := l.Lock(ctx) | ||
| assert.NoError(t, err, "expected no error on re-acquiring lock") | ||
| assert.True(t, lockedAgain, "expected not to acquire the lock again") | ||
|
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||
| // Test releasing the lock | ||
| unlocked, err := l.Unlock(ctx) | ||
| assert.NoError(t, err, "expected no error on releasing lock") | ||
| assert.True(t, unlocked, "expected to successfully release the lock") | ||
|
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||
| // Test re-acquiring the lock after release | ||
| lockedAgain, err = l.Lock(ctx) | ||
| assert.NoError(t, err, "expected no error on re-acquiring lock after release") | ||
| assert.True(t, lockedAgain, "expected to successfully re-acquire the lock after release") | ||
| } | ||
|
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||
| func TestAutoRenew(t *testing.T) { | ||
| // Set up a miniredis server | ||
| s, err := miniredis.Run() | ||
| if err != nil { | ||
| t.Fatalf("failed to start miniredis: %v", err) | ||
| } | ||
| defer s.Close() | ||
|
|
||
| // Create a Redis client | ||
| rdb := redis.NewClient(&redis.Options{ | ||
| Addr: s.Addr(), | ||
| }) | ||
|
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||
| ctx, cancel := context.WithCancel(context.Background()) | ||
| defer cancel() | ||
|
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| // Test auto-renewal of the lock | ||
| l := lock.NewRedisLock(rdb, "test-key-auto-renew", 1*time.Second) | ||
| locked, err := l.Lock(ctx) | ||
| assert.NoError(t, err, "expected no error on acquiring lock") | ||
| assert.True(t, locked, "expected to successfully acquire the lock") | ||
|
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| // Wait for some time to ensure the lock is being renewed | ||
| time.Sleep(1500 * time.Millisecond) | ||
|
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||
| // Check the TTL of the key to verify that it has been renewed | ||
| ttl, err := l.GetTTL(ctx) | ||
| assert.NoError(t, err, "expected no error on checking TTL") | ||
| assert.Greater(t, ttl, time.Duration(0), "expected TTL to be greater than zero due to renewal") | ||
|
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||
| // Release the lock | ||
| unlocked, err := l.Unlock(ctx) | ||
| assert.NoError(t, err, "expected no error on releasing lock") | ||
| assert.True(t, unlocked, "expected to successfully release the lock") | ||
| } |