/usr/share/gocode/src/github.com/Shopify/sarama/partitioner_test.go is in golang-github-shopify-sarama-dev 1.9.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 | package sarama
import (
"crypto/rand"
"log"
"testing"
)
func assertPartitioningConsistent(t *testing.T, partitioner Partitioner, message *ProducerMessage, numPartitions int32) {
choice, err := partitioner.Partition(message, numPartitions)
if err != nil {
t.Error(partitioner, err)
}
if choice < 0 || choice >= numPartitions {
t.Error(partitioner, "returned partition", choice, "outside of range for", message)
}
for i := 1; i < 50; i++ {
newChoice, err := partitioner.Partition(message, numPartitions)
if err != nil {
t.Error(partitioner, err)
}
if newChoice != choice {
t.Error(partitioner, "returned partition", newChoice, "inconsistent with", choice, ".")
}
}
}
func TestRandomPartitioner(t *testing.T) {
partitioner := NewRandomPartitioner("mytopic")
choice, err := partitioner.Partition(nil, 1)
if err != nil {
t.Error(partitioner, err)
}
if choice != 0 {
t.Error("Returned non-zero partition when only one available.")
}
for i := 1; i < 50; i++ {
choice, err := partitioner.Partition(nil, 50)
if err != nil {
t.Error(partitioner, err)
}
if choice < 0 || choice >= 50 {
t.Error("Returned partition", choice, "outside of range.")
}
}
}
func TestRoundRobinPartitioner(t *testing.T) {
partitioner := NewRoundRobinPartitioner("mytopic")
choice, err := partitioner.Partition(nil, 1)
if err != nil {
t.Error(partitioner, err)
}
if choice != 0 {
t.Error("Returned non-zero partition when only one available.")
}
var i int32
for i = 1; i < 50; i++ {
choice, err := partitioner.Partition(nil, 7)
if err != nil {
t.Error(partitioner, err)
}
if choice != i%7 {
t.Error("Returned partition", choice, "expecting", i%7)
}
}
}
func TestHashPartitioner(t *testing.T) {
partitioner := NewHashPartitioner("mytopic")
choice, err := partitioner.Partition(&ProducerMessage{}, 1)
if err != nil {
t.Error(partitioner, err)
}
if choice != 0 {
t.Error("Returned non-zero partition when only one available.")
}
for i := 1; i < 50; i++ {
choice, err := partitioner.Partition(&ProducerMessage{}, 50)
if err != nil {
t.Error(partitioner, err)
}
if choice < 0 || choice >= 50 {
t.Error("Returned partition", choice, "outside of range for nil key.")
}
}
buf := make([]byte, 256)
for i := 1; i < 50; i++ {
if _, err := rand.Read(buf); err != nil {
t.Error(err)
}
assertPartitioningConsistent(t, partitioner, &ProducerMessage{Key: ByteEncoder(buf)}, 50)
}
}
func TestManualPartitioner(t *testing.T) {
partitioner := NewManualPartitioner("mytopic")
choice, err := partitioner.Partition(&ProducerMessage{}, 1)
if err != nil {
t.Error(partitioner, err)
}
if choice != 0 {
t.Error("Returned non-zero partition when only one available.")
}
for i := int32(1); i < 50; i++ {
choice, err := partitioner.Partition(&ProducerMessage{Partition: i}, 50)
if err != nil {
t.Error(partitioner, err)
}
if choice != i {
t.Error("Returned partition not the same as the input partition")
}
}
}
// By default, Sarama uses the message's key to consistently assign a partition to
// a message using hashing. If no key is set, a random partition will be chosen.
// This example shows how you can partition messages randomly, even when a key is set,
// by overriding Config.Producer.Partitioner.
func ExamplePartitioner_random() {
config := NewConfig()
config.Producer.Partitioner = NewRandomPartitioner
producer, err := NewSyncProducer([]string{"localhost:9092"}, config)
if err != nil {
log.Fatal(err)
}
defer func() {
if err := producer.Close(); err != nil {
log.Println("Failed to close producer:", err)
}
}()
msg := &ProducerMessage{Topic: "test", Key: StringEncoder("key is set"), Value: StringEncoder("test")}
partition, offset, err := producer.SendMessage(msg)
if err != nil {
log.Fatalln("Failed to produce message to kafka cluster.")
}
log.Printf("Produced message to partition %d with offset %d", partition, offset)
}
// This example shows how to assign partitions to your messages manually.
func ExamplePartitioner_manual() {
config := NewConfig()
// First, we tell the producer that we are going to partition ourselves.
config.Producer.Partitioner = NewManualPartitioner
producer, err := NewSyncProducer([]string{"localhost:9092"}, config)
if err != nil {
log.Fatal(err)
}
defer func() {
if err := producer.Close(); err != nil {
log.Println("Failed to close producer:", err)
}
}()
// Now, we set the Partition field of the ProducerMessage struct.
msg := &ProducerMessage{Topic: "test", Partition: 6, Value: StringEncoder("test")}
partition, offset, err := producer.SendMessage(msg)
if err != nil {
log.Fatalln("Failed to produce message to kafka cluster.")
}
if partition != 6 {
log.Fatal("Message should have been produced to partition 6!")
}
log.Printf("Produced message to partition %d with offset %d", partition, offset)
}
// This example shows how to set a different partitioner depending on the topic.
func ExamplePartitioner_per_topic() {
config := NewConfig()
config.Producer.Partitioner = func(topic string) Partitioner {
switch topic {
case "access_log", "error_log":
return NewRandomPartitioner(topic)
default:
return NewHashPartitioner(topic)
}
}
// ...
}
|