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package kafka
/**
* Copyright 2016 Confluent Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import (
"encoding/json"
"fmt"
"os"
"time"
)
/*
#include <librdkafka/rdkafka.h>
*/
import "C"
var testconf struct {
Brokers string
Topic string
GroupID string
PerfMsgCount int
PerfMsgSize int
Config []string
conf ConfigMap
}
// testconf_read reads the test suite config file testconf.json which must
// contain at least Brokers and Topic string properties.
// Returns true if the testconf was found and usable, false if no such file, or panics
// if the file format is wrong.
func testconfRead() bool {
cf, err := os.Open("testconf.json")
if err != nil {
fmt.Fprintf(os.Stderr, "%% testconf.json not found - ignoring test\n")
return false
}
// Default values
testconf.PerfMsgCount = 2000000
testconf.PerfMsgSize = 100
testconf.GroupID = "testgroup"
jp := json.NewDecoder(cf)
err = jp.Decode(&testconf)
if err != nil {
panic(fmt.Sprintf("Failed to parse testconf: %s", err))
}
cf.Close()
if testconf.Brokers[0] == '$' {
// Read broker list from environment variable
testconf.Brokers = os.Getenv(testconf.Brokers[1:])
}
if testconf.Brokers == "" || testconf.Topic == "" {
panic("Missing Brokers or Topic in testconf.json")
}
return true
}
// update existing ConfigMap with key=value pairs from testconf.Config
func (cm *ConfigMap) updateFromTestconf() error {
if testconf.Config == nil {
return nil
}
// Translate "key=value" pairs in Config to ConfigMap
for _, s := range testconf.Config {
err := cm.Set(s)
if err != nil {
return err
}
}
return nil
}
// Return the number of messages available in all partitions of a topic.
// WARNING: This uses watermark offsets so it will be incorrect for compacted topics.
func getMessageCountInTopic(topic string) (int, error) {
// Create consumer
config := &ConfigMap{"bootstrap.servers": testconf.Brokers,
"group.id": testconf.GroupID}
config.updateFromTestconf()
c, err := NewConsumer(config)
if err != nil {
return 0, err
}
// get metadata for the topic to find out number of partitions
metadata, err := c.GetMetadata(&topic, false, 5*1000)
if err != nil {
return 0, err
}
t, ok := metadata.Topics[topic]
if !ok {
return 0, newError(C.RD_KAFKA_RESP_ERR__UNKNOWN_TOPIC)
}
cnt := 0
for _, p := range t.Partitions {
low, high, err := c.QueryWatermarkOffsets(topic, p.ID, 5*1000)
if err != nil {
continue
}
cnt += int(high - low)
}
return cnt, nil
}
// getBrokerList returns a list of brokers (ids) in the cluster
func getBrokerList(H Handle) (brokers []int32, err error) {
md, err := getMetadata(H, nil, true, 15*1000)
if err != nil {
return nil, err
}
brokers = make([]int32, len(md.Brokers))
for i, mdBroker := range md.Brokers {
brokers[i] = mdBroker.ID
}
return brokers, nil
}
// waitTopicInMetadata waits for the given topic to show up in metadata
func waitTopicInMetadata(H Handle, topic string, timeoutMs int) error {
d, _ := time.ParseDuration(fmt.Sprintf("%dms", timeoutMs))
tEnd := time.Now().Add(d)
for {
remain := tEnd.Sub(time.Now()).Seconds()
if remain < 0.0 {
return newErrorFromString(ErrTimedOut,
fmt.Sprintf("Timed out waiting for topic %s to appear in metadata", topic))
}
md, err := getMetadata(H, nil, true, int(remain*1000))
if err != nil {
return err
}
for _, t := range md.Topics {
if t.Topic != topic {
continue
}
if t.Error.Code() != ErrNoError || len(t.Partitions) < 1 {
continue
}
// Proper topic found in metadata
return nil
}
time.Sleep(500 * 1000) // 500ms
}
}
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