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63 lines
1.4 KiB
63 lines
1.4 KiB
package dao |
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import ( |
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"context" |
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"fmt" |
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"go-common/library/cache/memcache" |
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"go-common/library/log" |
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) |
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const ( |
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_partitionKey = "p_%s_%d" |
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) |
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// pingMC ping memcache. |
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func (d *Dao) pingMC(ctx context.Context) (err error) { |
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conn := d.mc.Get(ctx) |
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defer conn.Close() |
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if err = conn.Set(&memcache.Item{Key: "ping", Value: []byte{1}, Expiration: 0}); err != nil { |
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log.Error("conn.Store(set,ping,1) error(%v)", err) |
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} |
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return |
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} |
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func partitionCacheKey(e string, p int32) string { |
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return fmt.Sprintf(_partitionKey, e, p) |
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} |
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// OffsetCache . |
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func (d *Dao) OffsetCache(ctx context.Context, event string, p int32) (offset int64, err error) { |
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var ( |
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key = partitionCacheKey(event, p) |
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conn = d.mc.Get(ctx) |
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) |
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defer conn.Close() |
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reply, err := conn.Get(key) |
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if err != nil { |
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if err == memcache.ErrNotFound { |
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err = nil |
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return |
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} |
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log.Error("conn.Get(get,%d) error(%v)", p, err) |
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return |
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} |
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if err = conn.Scan(reply, &offset); err != nil { |
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log.Error("reply.Scan(%s) error(%v)", string(reply.Value), err) |
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} |
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return |
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} |
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// SetOffsetCache . |
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func (d *Dao) SetOffsetCache(ctx context.Context, event string, p int32, offset int64) (err error) { |
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var ( |
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key = partitionCacheKey(event, p) |
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conn = d.mc.Get(ctx) |
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) |
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defer conn.Close() |
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if err = conn.Set(&memcache.Item{Key: key, Object: offset, Expiration: 0, Flags: memcache.FlagJSON}); err != nil { |
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log.Error("conn.Set(%s,%d) error(%v)", key, offset, err) |
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} |
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return |
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}
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