Golang Client.Get方法代码示例

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/Read Array/Map combination directly instead of relying on java serializer.
 */
func testListMapCombined(client *as.Client) {
	log.Printf("Read/Write Array/Map")
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "listmapkey")
	client.Delete(shared.WritePolicy, key)

	blob := []byte{3, 52, 125}
	inner := []interface{}{
		"string2",
		5,
	}

	innerMap := map[interface{}]interface{}{
		"a":    1,
		2:      "b",
		3:      blob,
		"list": inner,
	}

	list := []interface{}{
		"string1",
		8,
		inner,
		innerMap,
	}

	bin := as.NewBin("listmapbin", list)
	client.PutBins(shared.WritePolicy, key, bin)

	record, err := client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)
	received := record.Bins[bin.Name].([]interface{})

	validateSize(4, len(received))
	validate("string1", received[0])
	// Server convert numbers to long, so must expect long.
	validate(8, received[1])

	receivedInner := received[2].([]interface{})
	validateSize(2, len(receivedInner))
	validate("string2", receivedInner[0])
	validate(5, receivedInner[1])

	receivedMap := received[3].(map[interface{}]interface{})
	validateSize(4, len(receivedMap))
	validate(1, receivedMap["a"])
	validate("b", receivedMap[2])
	validateBytes(blob, receivedMap[3].([]byte))

	receivedInner2 := receivedMap["list"].([]interface{})
	validateSize(2, len(receivedInner2))
	validate("string2", receivedInner2[0])
	validate(5, receivedInner2[1])

	log.Printf("Read/Write Array/Map successful")
}

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.")
	}
}

/**
 * Write and twice read a non-expiring tuple using the new "NoExpire" value (-1).
 * This example is most effective when the Default Namespace Time To Live (TTL)
 * is set to a small value, such as 5 seconds.  When we sleep beyond that
 * time, we show that the NoExpire TTL flag actually works.
 */
func noExpireExample(client *as.Client) {
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "expirekey")
	bin := as.NewBin("expirebin", "noexpirevalue")

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

	// Specify that record NEVER expires.
	// The "Never Expire" value is -1, or 0xFFFFFFFF.
	writePolicy := as.NewWritePolicy(0, 2)
	writePolicy.Expiration = -1
	client.PutBins(writePolicy, key, bin)

	// Read the record, showing it is there.
	log.Printf("Get: namespace=%s set=%s key=%s",
		key.Namespace(), key.SetName(), key.Value())

	record, err := client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)
	if record == nil {
		log.Fatalf(
			"Failed to get record: namespace=%s set=%s key=%s",
			key.Namespace(), key.SetName(), key.Value())
	}

	received := record.Bins[bin.Name]
	expected := bin.Value.String()
	if received == expected {
		log.Printf("Get record successful: namespace=%s set=%s key=%s bin=%s value=%s",
			key.Namespace(), key.SetName(), key.Value(), bin.Name, received)
	} else {
		log.Fatalf("Expire record mismatch: Expected %s. Received %s.",
			expected, received)
	}

	// Read this Record after the Default Expiration, showing it is still there.
	// We should have set the Namespace TTL at 5 sec.
	log.Printf("Sleeping for 10 seconds ...")
	time.Sleep(10 * time.Second)
	record, err = client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)

	if record == nil {
		log.Fatalf("Record expired and should NOT have.")
	} else {
		log.Printf("Found Record (correctly) after default TTL.")
	}
}

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)
	}
}

/**
 * Write and twice read an expiration record.
 */
func expireExample(client *as.Client) {
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "expirekey ")
	bin := as.NewBin("expirebin", "expirevalue")

	log.Printf("Put: namespace=%s set=%s key=%s bin=%s value=%s expiration=2",
		key.Namespace(), key.SetName(), key.Value(), bin.Name, bin.Value)

	// Specify that record expires 2 seconds after it's written.
	writePolicy := as.NewWritePolicy(0, 2)
	client.PutBins(writePolicy, key, bin)

	// Read the record before it expires, showing it is there.
	log.Printf("Get: namespace=%s set=%s key=%s",
		key.Namespace(), key.SetName(), key.Value())

	record, err := client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)
	if record == nil {
		log.Fatalf(
			"Failed to get record: namespace=%s set=%s key=%s",
			key.Namespace(), key.SetName(), key.Value())
	}

	received := record.Bins[bin.Name]
	expected := bin.Value.String()
	if received == expected {
		log.Printf("Get record successful: namespace=%s set=%s key=%s bin=%s value=%s",
			key.Namespace(), key.SetName(), key.Value(), bin.Name, received)
	} else {
		log.Fatalf("Expire record mismatch: Expected %s. Received %s.",
			expected, received)
	}

	// Read the record after it expires, showing it's gone.
	log.Printf("Sleeping for 3 seconds ...")
	time.Sleep(3 * time.Second)
	record, err = client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)
	if record == nil {
		log.Printf("Expiry of record successful. Record not found.")
	} else {
		log.Fatalf("Found record when it should have expired.")
	}
}

/**
 * Write/Read map[interface{}]interface{} directly instead of relying on java serializer.
 */
func testMapComplex(client *as.Client) {
	log.Printf("Read/Write map[interface{}]interface{}")
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "mapkey2")
	client.Delete(shared.WritePolicy, key)

	blob := []byte{3, 52, 125}
	list := []int{
		100034,
		12384955,
		3,
		512,
	}

	amap := map[interface{}]interface{}{
		"key1": "string1",
		"key2": 2,
		"key3": blob,
		"key4": list,
	}

	bin := as.NewBin("mapbin2", amap)
	client.PutBins(shared.WritePolicy, key, bin)

	record, err := client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)
	receivedMap := record.Bins[bin.Name].(map[interface{}]interface{})

	validateSize(4, len(receivedMap))
	validate("string1", receivedMap["key1"])
	// Server convert numbers to long, so must expect long.
	validate(2, receivedMap["key2"])
	validateBytes(blob, receivedMap["key3"].([]byte))

	receivedInner := receivedMap["key4"].([]interface{})
	validateSize(4, len(receivedInner))
	validate(100034, receivedInner[0])
	validate(12384955, receivedInner[1])
	validate(3, receivedInner[2])
	validate(512, receivedInner[3])

	log.Printf("Read/Write map[interface{}]interface{} successful")
}

func runReplaceExample(client *as.Client) {
	key, err := as.NewKey(*shared.Namespace, *shared.Set, "replacekey")
	shared.PanicOnError(err)
	bin1 := as.NewBin("bin1", "value1")
	bin2 := as.NewBin("bin2", "value2")
	bin3 := as.NewBin("bin3", "value3")

	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)

	log.Printf("Replace with: namespace=%s set=%s key=%s bin=%s value=%s",
		key.Namespace(), key.SetName(), key.Value(), bin3.Name, bin3.Value)

	wpolicy := as.NewWritePolicy(0, 0)
	wpolicy.RecordExistsAction = as.REPLACE
	client.PutBins(wpolicy, key, bin3)

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

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

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

	if record.Bins[bin1.Name] == nil {
		log.Printf(bin1.Name + " was deleted as expected.")
	} else {
		log.Fatalln(bin1.Name + " found when it should have been deleted.")
	}

	if record.Bins[bin2.Name] == nil {
		log.Printf(bin2.Name + " was deleted as expected.")
	} else {
		log.Fatalln(bin2.Name + " found when it should have been deleted.")
	}
	shared.ValidateBin(key, bin3, record)
}

/**
 * Write/Read []string directly instead of relying on java serializer.
 */
func testListStrings(client *as.Client) {
	log.Printf("Read/Write []string")
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "listkey1")
	client.Delete(shared.WritePolicy, key)

	list := []string{"string1", "string2", "string3"}

	bin := as.NewBin("listbin1", list)
	client.PutBins(shared.WritePolicy, key, bin)

	record, err := client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)
	receivedList := record.Bins[bin.Name].([]interface{})

	validateSize(3, len(receivedList))
	validate("string1", receivedList[0])
	validate("string2", receivedList[1])
	validate("string3", receivedList[2])

	log.Printf("Read/Write []string successful.")
}

// 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)
}

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, err := as.NewKey(*shared.Namespace, *shared.Set, "prependkey")
	shared.PanicOnError(err)

	binName := "prependbin"

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

	bin := as.NewBin(binName, "World")
	log.Println("Initial prepend will create record.  Initial value is ", bin.Value, ".")
	client.PrependBins(shared.WritePolicy, key, bin)

	bin = as.NewBin(binName, "Hello ")
	log.Println("Prepend \"", bin.Value, "\" to existing record.")
	client.PrependBins(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 := "Hello World"

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

/**
 * Write/Read map[string]string directly instead of relying on java serializer.
 */
func testMapStrings(client *as.Client) {
	log.Printf("Read/Write map[string]string")
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "mapkey1")
	client.Delete(shared.WritePolicy, key)

	amap := map[string]string{"key1": "string1",
		"key2": "string2",
		"key3": "string3",
	}
	bin := as.NewBin("mapbin1", amap)
	client.PutBins(shared.WritePolicy, key, bin)

	record, err := client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)
	receivedMap := record.Bins[bin.Name].(map[interface{}]interface{})

	validateSize(3, len(receivedMap))
	validate("string1", receivedMap["key1"])
	validate("string2", receivedMap["key2"])
	validate("string3", receivedMap["key3"])

	log.Printf("Read/Write map[string]string successful")
}

/**
 * Write/Read []interface{} directly instead of relying on java serializer.
 */
func testListComplex(client *as.Client) {
	log.Printf("Read/Write []interface{}")
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "listkey2")
	client.Delete(shared.WritePolicy, key)

	blob := []byte{3, 52, 125}
	list := []interface{}{"string1", 2, blob}

	bin := as.NewBin("listbin2", list)
	client.PutBins(shared.WritePolicy, key, bin)

	record, err := client.Get(shared.Policy, key, bin.Name)
	shared.PanicOnError(err)
	receivedList := record.Bins[bin.Name].([]interface{})

	validateSize(3, len(receivedList))
	validate("string1", receivedList[0])
	// Server convert numbers to long, so must expect long.
	validate(2, receivedList[1])
	validateBytes(blob, receivedList[2].([]byte))

	log.Printf("Read/Write []interface{} successful.")
}

// Execute put and get on a server configured as multi-bin.  This is the server default.
func runMultiBinExample(client *as.Client) {
	key, _ := as.NewKey(*shared.Namespace, *shared.Set, "putgetkey")
	bin1 := as.NewBin("bin1", "value1")
	bin2 := as.NewBin("bin2", "value2")

	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)

	log.Printf("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, bin1, record)
	shared.ValidateBin(key, bin2, record)
}