EnableReadOperation to rueidisprob.BloomFilter

[proost]

Problems:

I found that when using BloomFilter we can't use replica.

Because BITFIELD is write category command.
we can't simply change to BITFIELD to BITFIELD_RO. because BITFIELD_RO supports from 6.0.0 version. change narrow down supported redis version to use rueidisprob.

Event if we change BITFIELD command to BITFIELD_RO, it is difficult to use replica. Because we always use EVAL and EVALSHA command to read & write. For example if we use SendToReplicas option for read-write splitting, we can't easily configure SendToReplicas due to hard to distinguish read & write commands.

Solution

Adding

// BloomFilterOptions is used to configure BloomFilter.
type BloomFilterOptions struct {
	enableReadOperation bool
}

// BloomFilterOptionFunc is used to configure BloomFilter.
type BloomFilterOptionFunc func(*BloomFilterOptions)

// WithEnableReadOperation enables read operation.
// If enabled, Exists and ExistsMulti methods will be available as read-only operations.
// NOTE: If enabled, minimum redis version should be 7.0.0.
func WithEnableReadOperation(enableReadOperations bool) BloomFilterOptionFunc {
	return func(o *BloomFilterOptions) {
		o.enableReadOperation = enableReadOperations
	}
}

we add options to constructor like this

func NewBloomFilter(
	client rueidis.Client,
	name string,
	expectedNumberOfItems uint,
	falsePositiveRate float64,
	opts ...BloomFilterOptionFunc,
) (BloomFilter, error) {

So if enableReadOperation is true, we use BITFIELD_RO, EVAL_RO, EVALSHA_RO.

Considering

I don't want to change minimum version of rueidisprob.BloomFilter to 6.0.0 or 7.0.0

[rueian]

Great!

[proost]

#598

Closed due to above PR