feat: added consistency params support

CHANGELOG.md

@@ -1,4 +1,6 @@
 ## [unreleased]
+### Features
+- [#348](https://github.com/influxdata/influxdb-client-go/pull/348) Added `write.Options.Consitency` parameter to support InfluxDB Enterprise.  
 
 ## 2.9.2 [2022-07-29]
 ### Bug fixes

api/write/options.go

@@ -33,8 +33,27 @@ type Options struct {
 	maxRetryTime uint
 	// The base for the exponential retry delay
 	exponentialBase uint
+	// InfluxDB Enterprise write consistency as explained in https://docs.influxdata.com/enterprise_influxdb/v1.9/concepts/clustering/#write-consistency
+	consistency Consistency
 }
 
+const (
+	// ConsistencyOne requires at least one data node acknowledged a write.
+	ConsistencyOne Consistency = "one"
+
+	// ConsistencyAll requires all data nodes to acknowledge a write.
+	ConsistencyAll Consistency = "all"
+
+	// ConsistencyQuorum requires a quorum of data nodes to acknowledge a write.
+	ConsistencyQuorum Consistency = "quorum"
+
+	// ConsistencyAny allows for hinted hand off, potentially no write happened yet.
+	ConsistencyAny Consistency = "any"
+)
+
+// Consistency defines enum for allows consistency values for InfluxDB Enterprise, as explained  https://docs.influxdata.com/enterprise_influxdb/v1.9/concepts/clustering/#write-consistency
+type Consistency string
+
 // BatchSize returns size of batch
 func (o *Options) BatchSize() uint {
 	return o.batchSize
@@ -162,6 +181,17 @@ func (o *Options) DefaultTags() map[string]string {
 	return o.defaultTags
 }
 
+// Consistency returns consistency for param value
+func (o *Options) Consistency() Consistency {
+	return o.consistency
+}
+
+// SetConsistency allows setting InfluxDB Enterprise write consistency, as explained in https://docs.influxdata.com/enterprise_influxdb/v1.9/concepts/clustering/#write-consistency */
+func (o *Options) SetConsistency(consistency Consistency) *Options {
+	o.consistency = consistency
+	return o
+}
+
 // DefaultOptions returns Options object with default values
 func DefaultOptions() *Options {
 	return &Options{batchSize: 5_000, flushInterval: 1_000, precision: time.Nanosecond, useGZip: false, retryBufferLimit: 50_000, defaultTags: make(map[string]string),

api/write/options_test.go

@@ -24,6 +24,7 @@ func TestDefaultOptions(t *testing.T) {
 	assert.EqualValues(t, 125_000, opts.MaxRetryInterval())
 	assert.EqualValues(t, 180_000, opts.MaxRetryTime())
 	assert.EqualValues(t, 2, opts.ExponentialBase())
+	assert.EqualValues(t, "", opts.Consistency())
 	assert.Len(t, opts.DefaultTags(), 0)
 }
 
@@ -40,7 +41,8 @@ func TestSettingsOptions(t *testing.T) {
 		SetExponentialBase(3).
 		SetMaxRetryTime(200_000).
 		AddDefaultTag("a", "1").
-		AddDefaultTag("b", "2")
+		AddDefaultTag("b", "2").
+		SetConsistency(write.ConsistencyOne)
 	assert.EqualValues(t, 5, opts.BatchSize())
 	assert.EqualValues(t, true, opts.UseGZip())
 	assert.EqualValues(t, 5000, opts.FlushInterval())
@@ -51,5 +53,6 @@ func TestSettingsOptions(t *testing.T) {
 	assert.EqualValues(t, 150_000, opts.MaxRetryInterval())
 	assert.EqualValues(t, 200_000, opts.MaxRetryTime())
 	assert.EqualValues(t, 3, opts.ExponentialBase())
+	assert.EqualValues(t, "one", opts.Consistency())
 	assert.Len(t, opts.DefaultTags(), 2)
 }

internal/write/service.go

@@ -79,6 +79,9 @@ func NewService(org string, bucket string, httpService http2.Service, options *w
 	params.Set("org", org)
 	params.Set("bucket", bucket)
 	params.Set("precision", precisionToString(options.Precision()))
+	if options.Consistency() != "" {
+		params.Set("consistency", string(options.Consistency()))
+	}
 	u.RawQuery = params.Encode()
 	writeURL := u.String()
 	return &Service{

internal/write/service_test.go

@@ -647,3 +647,15 @@ func TestFlush(t *testing.T) {
 	assert.Len(t, hs.Lines(), 5)
 	assert.Equal(t, 0, srv.retryQueue.list.Len())
 }
+
+func TestConsistencyParam(t *testing.T) {
+	hs := test.NewTestService(t, "http://localhost:8888")
+	opts := write.DefaultOptions().SetConsistency(write.ConsistencyQuorum)
+	srv := NewService("org", "buc", hs, opts)
+
+	require.Equal(t, "http://localhost:8888/api/v2/write?bucket=buc&consistency=quorum&org=org&precision=ns", srv.WriteURL())
+	opts = write.DefaultOptions()
+	srv = NewService("org", "buc", hs, opts)
+
+	require.Equal(t, "http://localhost:8888/api/v2/write?bucket=buc&org=org&precision=ns", srv.WriteURL())
+}