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client_impl.go
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client_impl.go
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.
package pulsar
import (
"fmt"
"net/url"
"time"
"github.com/sirupsen/logrus"
"github.com/JEFFTheDev/pulsar-client-go/pulsar/internal"
"github.com/JEFFTheDev/pulsar-client-go/pulsar/internal/auth"
"github.com/JEFFTheDev/pulsar-client-go/pulsar/log"
)
const (
defaultConnectionTimeout = 10 * time.Second
defaultOperationTimeout = 30 * time.Second
)
type client struct {
cnxPool internal.ConnectionPool
rpcClient internal.RPCClient
handlers internal.ClientHandlers
lookupService internal.LookupService
metrics *internal.Metrics
log log.Logger
}
func newClient(options ClientOptions) (Client, error) {
var logger log.Logger
if options.Logger != nil {
logger = options.Logger
} else {
logger = log.NewLoggerWithLogrus(logrus.StandardLogger())
}
if options.URL == "" {
return nil, newError(InvalidConfiguration, "URL is required for client")
}
url, err := url.Parse(options.URL)
if err != nil {
logger.WithError(err).Error("Failed to parse service URL")
return nil, newError(InvalidConfiguration, "Invalid service URL")
}
var tlsConfig *internal.TLSOptions
switch url.Scheme {
case "pulsar", "http":
tlsConfig = nil
case "pulsar+ssl", "https":
tlsConfig = &internal.TLSOptions{
AllowInsecureConnection: options.TLSAllowInsecureConnection,
TrustCertsFilePath: options.TLSTrustCertsFilePath,
ValidateHostname: options.TLSValidateHostname,
}
default:
return nil, newError(InvalidConfiguration, fmt.Sprintf("Invalid URL scheme '%s'", url.Scheme))
}
var authProvider auth.Provider
var ok bool
if options.Authentication == nil {
authProvider = auth.NewAuthDisabled()
} else {
authProvider, ok = options.Authentication.(auth.Provider)
if !ok {
return nil, newError(AuthenticationError, "invalid auth provider interface")
}
}
err = authProvider.Init()
if err != nil {
return nil, err
}
connectionTimeout := options.ConnectionTimeout
if connectionTimeout.Nanoseconds() == 0 {
connectionTimeout = defaultConnectionTimeout
}
operationTimeout := options.OperationTimeout
if operationTimeout.Nanoseconds() == 0 {
operationTimeout = defaultOperationTimeout
}
maxConnectionsPerHost := options.MaxConnectionsPerBroker
if maxConnectionsPerHost <= 0 {
maxConnectionsPerHost = 1
}
if options.MetricsCardinality == 0 {
options.MetricsCardinality = MetricsCardinalityNamespace
}
var metrics *internal.Metrics
if options.CustomMetricsLabels != nil {
metrics = internal.NewMetricsProvider(int(options.MetricsCardinality), options.CustomMetricsLabels)
} else {
metrics = internal.NewMetricsProvider(int(options.MetricsCardinality), map[string]string{})
}
c := &client{
cnxPool: internal.NewConnectionPool(tlsConfig, authProvider, connectionTimeout, maxConnectionsPerHost, logger,
metrics),
log: logger,
metrics: metrics,
}
serviceNameResolver := internal.NewPulsarServiceNameResolver(url)
c.rpcClient = internal.NewRPCClient(url, serviceNameResolver, c.cnxPool, operationTimeout, logger, metrics)
switch url.Scheme {
case "pulsar", "pulsar+ssl":
c.lookupService = internal.NewLookupService(c.rpcClient, url, serviceNameResolver,
tlsConfig != nil, options.ListenerName, logger, metrics)
case "http", "https":
httpClient, err := internal.NewHTTPClient(url, serviceNameResolver, tlsConfig,
operationTimeout, logger, metrics, authProvider)
if err != nil {
return nil, newError(InvalidConfiguration, fmt.Sprintf("Failed to init http client with err: '%s'",
err.Error()))
}
c.lookupService = internal.NewHTTPLookupService(httpClient, url, serviceNameResolver,
tlsConfig != nil, logger, metrics)
default:
return nil, newError(InvalidConfiguration, fmt.Sprintf("Invalid URL scheme '%s'", url.Scheme))
}
c.handlers = internal.NewClientHandlers()
return c, nil
}
func (c *client) CreateProducer(options ProducerOptions) (Producer, error) {
producer, err := newProducer(c, &options)
if err == nil {
c.handlers.Add(producer)
}
return producer, err
}
func (c *client) Subscribe(options ConsumerOptions) (Consumer, error) {
consumer, err := newConsumer(c, options)
if err != nil {
return nil, err
}
c.handlers.Add(consumer)
return consumer, nil
}
func (c *client) CreateReader(options ReaderOptions) (Reader, error) {
reader, err := newReader(c, options)
if err != nil {
return nil, err
}
c.handlers.Add(reader)
return reader, nil
}
func (c *client) CreateTableView(options TableViewOptions) (TableView, error) {
tableView, err := newTableView(c, options)
if err != nil {
return nil, err
}
c.handlers.Add(tableView)
return tableView, nil
}
func (c *client) TopicPartitions(topic string) ([]string, error) {
topicName, err := internal.ParseTopicName(topic)
if err != nil {
return nil, err
}
r, err := c.lookupService.GetPartitionedTopicMetadata(topic)
if err != nil {
return nil, err
}
if r != nil {
if r.Partitions > 0 {
partitions := make([]string, r.Partitions)
for i := 0; i < r.Partitions; i++ {
partitions[i] = fmt.Sprintf("%s-partition-%d", topic, i)
}
return partitions, nil
}
}
// Non-partitioned topic
return []string{topicName.Name}, nil
}
func (c *client) Close() {
c.handlers.Close()
c.cnxPool.Close()
c.lookupService.Close()
}