Golang aerospike-client-go.Client类代码示例

func runExample(client *as.Client) {
	log.Printf("Scan parallel: namespace=" + *shared.Namespace + " set=" + *shared.Set)
	recordCount := 0
	begin := time.Now()
	policy := as.NewScanPolicy()
	recordset, err := client.ScanAll(policy, *shared.Namespace, *shared.Set)
	shared.PanicOnError(err)

L:
	for {
		select {
		case rec := <-recordset.Records:
			if rec == nil {
				break L
			}
			recordCount++

			if (recordCount % 10000) == 0 {
				log.Println("Records ", recordCount)
			}
		case err := <-recordset.Errors:
			// if there was an error, stop
			shared.PanicOnError(err)
		}
	}

	end := time.Now()
	seconds := float64(end.Sub(begin)) / float64(time.Second)
	log.Println("Total records returned: ", recordCount)
	log.Println("Elapsed time: ", seconds, " seconds")
	performance := shared.Round(float64(recordCount)/float64(seconds), 0.5, 0)
	log.Println("Records/second: ", performance)
}

/**
 * Read record header data in one batch.
 */
func batchReadHeaders(
	client *as.Client,
	keyPrefix string,
	size int,
) {
	// Batch gets into one call.
	keys := make([]*as.Key, size)
	for i := 0; i < size; i++ {
		keys[i], _ = as.NewKey(*shared.Namespace, *shared.Set, keyPrefix+strconv.Itoa(i+1))
	}

	records, err := client.BatchGetHeader(nil, keys)
	shared.PanicOnError(err)

	for i := 0; i < len(records); i++ {
		key := keys[i]
		record := records[i]
		level := asl.ERR
		generation := 0
		expiration := 0

		if record != nil && (record.Generation > 0 || record.Expiration > 0) {
			level = asl.INFO
			generation = record.Generation
			expiration = record.Expiration
		}
		asl.Logger.LogAtLevel(level, "Record: ns=%s set=%s key=%s generation=%d expiration=%d",
			key.Namespace(), key.SetName(), key.Value(), generation, expiration)
	}

	if len(records) != size {
		log.Fatalf("Record size mismatch. Expected %d. Received %d.", size, len(records))
	}
}

func runExample(client *as.Client) {
	// Write initial record.
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "opkey")
	bin1 := as.NewBin("optintbin", 7)
	bin2 := as.NewBin("optstringbin", "string value")
	log.Printf("Put: namespace=%s set=%s key=%s bin1=%s value1=%s bin2=%s value2=%s",
		key.Namespace(), key.SetName(), key.Value(), bin1.Name, bin1.Value, bin2.Name, bin2.Value)
	client.PutBins(shared.WritePolicy, key, bin1, bin2)

	// Add integer, write new string and read record.
	bin3 := as.NewBin(bin1.Name, 4)
	bin4 := as.NewBin(bin2.Name, "new string")
	log.Println("Add: ", bin3.Value)
	log.Println("Write: ", bin4.Value)
	log.Println("Read:")

	record, err := client.Operate(shared.WritePolicy, key, as.AddOp(bin3), as.PutOp(bin4), as.GetOp())
	shared.PanicOnError(err)

	if record == nil {
		log.Fatalf(
			"Failed to get: namespace=%s set=%s key=%s",
			key.Namespace(), key.SetName(), key.Value())
	}

	binExpected := as.NewBin(bin3.Name, 11)
	shared.ValidateBin(key, binExpected, record)
	shared.ValidateBin(key, bin4, record)
}

/**
 * Read records in one batch.
 */
func batchReads(
	client *as.Client,
	keyPrefix string,
	binName string,
	size int,
) {
	// Batch gets into one call.
	keys := make([]*as.Key, size)
	for i := 0; i < size; i++ {
		keys[i], _ = as.NewKey(*shared.Namespace, *shared.Set, keyPrefix+strconv.Itoa(i+1))
	}

	records, err := client.BatchGet(nil, keys, binName)
	shared.PanicOnError(err)

	for i := 0; i < len(records); i++ {
		key := keys[i]
		record := records[i]
		level := asl.ERR
		var value interface{}

		if record != nil {
			level = asl.INFO
			value = record.Bins[binName]
		}
		asl.Logger.LogAtLevel(level, "Record: ns=%s set=%s key=%s bin=%s value=%s",
			key.Namespace(), key.SetName(), key.Value(), binName, value)
	}

	if len(records) != size {
		log.Fatalf("Record size mismatch. Expected %d. Received %d.", size, len(records))
	}
}

func runExample(client *as.Client) {
	log.Println("Scan series: namespace=", *shared.Namespace, " set=", *shared.Set)

	// Use low scan priority.  This will take more time, but it will reduce
	// the load on the server.
	policy := as.NewScanPolicy()
	policy.MaxRetries = 1
	policy.Priority = as.LOW

	nodeList := client.GetNodes()
	begin := time.Now()

	for _, node := range nodeList {
		log.Println("Scan node ", node.GetName())
		recordset, err := client.ScanNode(policy, node, *shared.Namespace, *shared.Set)
		shared.PanicOnError(err)

	L:
		for {
			select {
			case rec := <-recordset.Records:
				if rec == nil {
					break L
				}
				metrics, exists := setMap[rec.Key.SetName()]

				if !exists {
					metrics = Metrics{}
				}
				metrics.count++
				metrics.total++
				setMap[rec.Key.SetName()] = metrics

			case err := <-recordset.Errors:
				// if there was an error, stop
				shared.PanicOnError(err)
			}
		}

		for k, v := range setMap {
			log.Println("Node ", node, " set ", k, " count: ", v.count)
			v.count = 0
		}
	}

	end := time.Now()
	seconds := float64(end.Sub(begin)) / float64(time.Second)
	log.Println("Elapsed time: ", seconds, " seconds")

	total := 0

	for k, v := range setMap {
		log.Println("Total set ", k, " count: ", v.total)
		total += v.total
	}
	log.Println("Grand total: ", total)
	performance := shared.Round(float64(total)/seconds, 0.5, 0)
	log.Println("Records/second: ", performance)
}

func runExample(client *as.Client) {
	key, err := as.NewKey(*shared.Namespace, *shared.Set, "addkey")
	shared.PanicOnError(err)

	binName := "addbin"

	// Delete record if it already exists.
	client.Delete(shared.WritePolicy, key)

	// Perform some adds and check results.
	bin := as.NewBin(binName, 10)
	log.Println("Initial add will create record.  Initial value is ", bin.Value, ".")
	client.AddBins(shared.WritePolicy, key, bin)

	bin = as.NewBin(binName, 5)
	log.Println("Add ", bin.Value, " to existing record.")
	client.AddBins(shared.WritePolicy, key, bin)

	record, err := client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)

	if record == nil {
		log.Fatalf(
			"Failed to get: namespace=%s set=%s key=%s",
			key.Namespace(), key.SetName(), key.Value())
	}

	// The value received from the server is an unsigned byte stream.
	// Convert to an integer before comparing with expected.
	received := record.Bins[bin.Name]
	expected := 15

	if received == expected {
		log.Printf("Add successful: ns=%s set=%s key=%s bin=%s value=%s",
			key.Namespace(), key.SetName(), key.Value(), bin.Name, received)
	} else {
		log.Fatalf("Add mismatch: Expected %d. Received %d.", expected, received)
	}

	// Demonstrate add and get combined.
	bin = as.NewBin(binName, 30)
	log.Println("Add ", bin.Value, " to existing record.")
	record, err = client.Operate(shared.WritePolicy, key, as.AddOp(bin), as.GetOp())
	shared.PanicOnError(err)

	expected = 45
	received = record.Bins[bin.Name]

	if received == expected {
		log.Printf("Add successful: ns=%s set=%s key=%s bin=%s value=%s",
			key.Namespace(), key.SetName(), key.Value(), bin.Name, received)
	} else {
		log.Fatalf("Add mismatch: Expected %d. Received %d.", expected, received)
	}
}

/**
 * Write records individually.
 */
func writeRecords(
	client *as.Client,
	keyPrefix string,
	binName string,
	valuePrefix string,
	size int,
) {
	for i := 1; i <= size; i++ {
		key, _ := as.NewKey(*shared.Namespace, *shared.Set, keyPrefix+strconv.Itoa(i))
		bin := as.NewBin(binName, valuePrefix+strconv.Itoa(i))

		log.Printf("Put: ns=%s set=%s key=%s bin=%s value=%s",
			key.Namespace(), key.SetName(), key.Value(), bin.Name, bin.Value)

		client.PutBins(shared.WritePolicy, key, bin)
	}
}

func writeUsingUdf(client *as.Client) {
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "udfkey1")
	bin := as.NewBin("udfbin1", "string value")

	client.Execute(shared.WritePolicy, key, "record_example", "writeBin", as.NewValue(bin.Name), bin.Value)

	record, err := client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)
	expected := bin.Value.String()
	received := record.Bins[bin.Name].(string)

	if received == expected {
		log.Printf("Data matched: namespace=%s set=%s key=%s bin=%s value=%s",
			key.Namespace(), key.SetName(), key.Value(), bin.Name, received)
	} else {
		log.Printf("Data mismatch: Expected %s. Received %s.", expected, received)
	}
}

// Read record header data.
func runGetHeaderExample(client *as.Client) {
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "putgetkey")

	log.Printf("Get record header: namespace=%s set=%s key=%s", key.Namespace(), key.SetName(), key.Value())
	record, err := client.GetHeader(shared.Policy, key)
	shared.PanicOnError(err)

	if record == nil {
		panic(errors.New(fmt.Sprintf(
			"Failed to get: namespace=%s set=%s key=%s", key.Namespace(), key.SetName(), key.Value())))
	}

	// Generation should be greater than zero.  Make sure it's populated.
	if record.Generation == 0 {
		panic(errors.New(fmt.Sprintf(
			"Invalid record header: generation=%d expiration=%d", record.Generation, record.Expiration)))
	}
	log.Printf("Received: generation=%d expiration=%d (%s)\n", record.Generation, record.Expiration, time.Duration(record.Expiration)*time.Second)
}

func writeWithValidation(client *as.Client) {
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "udfkey4")
	binName := "udfbin4"

	// Lua function writeWithValidation accepts number between 1 and 10.
	// Write record with valid value.
	log.Printf("Write with valid value.")
	client.Execute(shared.WritePolicy, key, "record_example", "writeWithValidation", as.NewValue(binName), as.NewValue(4))

	// Write record with invalid value.
	log.Printf("Write with invalid value.")

	_, err := client.Execute(shared.WritePolicy, key, "record_example", "writeWithValidation", as.NewValue(binName), as.NewValue(11))
	if err == nil {
		log.Printf("UDF should not have succeeded!")
	} else {
		log.Printf("Success. UDF resulted in exception as expected.")
	}
}

func runReplaceOnlyExample(client *as.Client) {
	key, err := as.NewKey(*shared.Namespace, *shared.Set, "replaceonlykey")
	shared.PanicOnError(err)
	bin := as.NewBin("bin", "value")

	// Delete record if it already exists.
	client.Delete(shared.WritePolicy, key)

	log.Printf("Replace record requiring that it exists: namespace=%s set=%s key=%s",
		key.Namespace(), key.SetName(), key.Value())

	wpolicy := as.NewWritePolicy(0, 0)
	wpolicy.RecordExistsAction = as.REPLACE_ONLY
	err = client.PutBins(wpolicy, key, bin)
	if ae, ok := err.(ast.AerospikeError); ok && ae.ResultCode() == ast.KEY_NOT_FOUND_ERROR {
		log.Printf("Success. `Not found` error returned as expected.")
	} else {
		log.Fatalln("Failure. This command should have resulted in an error.")
	}
}

// Execute put and get on a server configured as single-bin.
func runSingleBinExample(client *as.Client) {
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "putgetkey")
	bin := as.NewBin("", "value")

	log.Printf("Single Put: namespace=%s set=%s key=%s value=%s",
		key.Namespace(), key.SetName(), key.Value(), bin.Value)

	client.PutBins(shared.WritePolicy, key, bin)

	log.Printf("Single Get: namespace=%s set=%s key=%s", key.Namespace(), key.SetName(), key.Value())

	record, err := client.Get(shared.Policy, key)
	shared.PanicOnError(err)

	if record == nil {
		panic(errors.New(fmt.Sprintf(
			"Failed to get: namespace=%s set=%s key=%s", key.Namespace(), key.SetName(), key.Value())))
	}

	shared.ValidateBin(key, bin, record)
}

/**
 * Check existence of records in one batch.
 */
func batchExists(
	client *as.Client,

	keyPrefix string,
	size int,
) {
	// Batch into one call.
	keys := make([]*as.Key, size)
	for i := 0; i < size; i++ {
		keys[i], _ = as.NewKey(*shared.Namespace, *shared.Set, keyPrefix+strconv.Itoa(i+1))
	}

	existsArray, err := client.BatchExists(nil, keys)
	shared.PanicOnError(err)

	for i := 0; i < len(existsArray); i++ {
		key := keys[i]
		exists := existsArray[i]
		log.Printf("Record: ns=%s set=%s key=%s exists=%s",
			key.Namespace(), key.SetName(), key.Value(), exists)
	}
}

func writeIfNotExists(client *as.Client) {
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "udfkey3")
	binName := "udfbin3"

	// Delete record if it already exists.
	client.Delete(shared.WritePolicy, key)

	// Write record only if not already exists. This should succeed.
	client.Execute(shared.WritePolicy, key, "record_example", "writeUnique", as.NewValue(binName), as.NewValue("first"))

	// Verify record written.
	record, err := client.Get(shared.Policy, key, binName)
	shared.PanicOnError(err)
	expected := "first"
	received := record.Bins[binName].(string)

	if received == expected {
		log.Printf("Record written: namespace=%s set=%s key=%s bin=%s value=%s",
			key.Namespace(), key.SetName(), key.Value(), binName, received)
	} else {
		log.Printf("Data mismatch: Expected %s. Received %s.", expected, received)
	}

	// Write record second time. This should fail.
	log.Printf("Attempt second write.")
	client.Execute(shared.WritePolicy, key, "record_example", "writeUnique", as.NewValue(binName), as.NewValue("second"))

	// Verify record not written.
	record, err = client.Get(shared.Policy, key, binName)
	shared.PanicOnError(err)
	received = record.Bins[binName].(string)

	if received == expected {
		log.Printf("Success. Record remained unchanged: namespace=%s set=%s key=%s bin=%s value=%s",
			key.Namespace(), key.SetName(), key.Value(), binName, received)
	} else {
		log.Printf("Data mismatch: Expected %s. Received %s.", expected, received)
	}
}

func runExample(client *as.Client) {
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "touchkey")
	bin := as.NewBin("touchbin", "touchvalue")

	log.Printf("Create record with 2 second expiration.")
	writePolicy := as.NewWritePolicy(0, 2)
	client.PutBins(writePolicy, key, bin)

	log.Printf("Touch same record with 5 second expiration.")
	writePolicy.Expiration = 5
	record, err := client.Operate(writePolicy, key, as.TouchOp(), as.GetHeaderOp())

	if record == nil {
		log.Fatalf(
			"Failed to get: namespace=%s set=%s key=%s bin=%s value=%s",
			key.Namespace(), key.SetName(), key.Value(), bin.Name, nil)
	}

	if record.Expiration == 0 {
		log.Fatalf(
			"Failed to get record expiration: namespace=%s set=%s key=%s",
			key.Namespace(), key.SetName(), key.Value())
	}

	log.Printf("Sleep 3 seconds.")
	time.Sleep(3 * time.Second)

	record, err = client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)

	if record == nil {
		log.Fatalf(
			"Failed to get: namespace=%s set=%s key=%s",
			key.Namespace(), key.SetName(), key.Value())
	}

	log.Printf("Success. Record still exists.")
	log.Printf("Sleep 4 seconds.")
	time.Sleep(4 * time.Second)

	record, err = client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)

	if record == nil {
		log.Printf("Success. Record expired as expected.")
	} else {
		log.Fatalf("Found record when it should have expired.")
	}
}