mirror of https://github.com/minio/minio.git
59 lines
3.5 KiB
Go
59 lines
3.5 KiB
Go
|
/*
|
||
|
|
Package sarama is a pure Go client library for dealing with Apache Kafka (versions 0.8 and later). It includes a high-level
|
||
|
|
API for easily producing and consuming messages, and a low-level API for controlling bytes on the wire when the high-level
|
||
|
|
API is insufficient. Usage examples for the high-level APIs are provided inline with their full documentation.
|
||
|
|
|
||
|
|
To produce messages, use either the AsyncProducer or the SyncProducer. The AsyncProducer accepts messages on a channel
|
||
|
|
and produces them asynchronously in the background as efficiently as possible; it is preferred in most cases.
|
||
|
|
The SyncProducer provides a method which will block until Kafka acknowledges the message as produced. This can be
|
||
|
|
useful but comes with two caveats: it will generally be less efficient, and the actual durability guarantees
|
||
|
|
depend on the configured value of `Producer.RequiredAcks`. There are configurations where a message acknowledged by the
|
||
|
|
SyncProducer can still sometimes be lost.
|
||
|
|
|
||
|
|
To consume messages, use the Consumer. Note that Sarama's Consumer implementation does not currently support automatic
|
||
|
|
consumer-group rebalancing and offset tracking. For Zookeeper-based tracking (Kafka 0.8.2 and earlier), the
|
||
|
|
https://github.com/wvanbergen/kafka library builds on Sarama to add this support. For Kafka-based tracking (Kafka 0.9
|
||
|
|
and later), the https://github.com/bsm/sarama-cluster library builds on Sarama to add this support.
|
||
|
|
|
||
|
|
For lower-level needs, the Broker and Request/Response objects permit precise control over each connection
|
||
|
|
and message sent on the wire; the Client provides higher-level metadata management that is shared between
|
||
|
|
the producers and the consumer. The Request/Response objects and properties are mostly undocumented, as they line up
|
||
|
|
exactly with the protocol fields documented by Kafka at
|
||
|
|
https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol
|
||
|
|
*/
|
||
|
|
package sarama
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io/ioutil"
|
||
|
|
"log"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Logger is the instance of a StdLogger interface that Sarama writes connection
|
||
|
|
// management events to. By default it is set to discard all log messages via ioutil.Discard,
|
||
|
|
// but you can set it to redirect wherever you want.
|
||
|
|
var Logger StdLogger = log.New(ioutil.Discard, "[Sarama] ", log.LstdFlags)
|
||
|
|
|
||
|
|
// StdLogger is used to log error messages.
|
||
|
|
type StdLogger interface {
|
||
|
|
Print(v ...interface{})
|
||
|
|
Printf(format string, v ...interface{})
|
||
|
|
Println(v ...interface{})
|
||
|
|
}
|
||
|
|
|
||
|
|
// PanicHandler is called for recovering from panics spawned internally to the library (and thus
|
||
|
|
// not recoverable by the caller's goroutine). Defaults to nil, which means panics are not recovered.
|
||
|
|
var PanicHandler func(interface{})
|
||
|
|
|
||
|
|
// MaxRequestSize is the maximum size (in bytes) of any request that Sarama will attempt to send. Trying
|
||
|
|
// to send a request larger than this will result in an PacketEncodingError. The default of 100 MiB is aligned
|
||
|
|
// with Kafka's default `socket.request.max.bytes`, which is the largest request the broker will attempt
|
||
|
|
// to process.
|
||
|
|
var MaxRequestSize int32 = 100 * 1024 * 1024
|
||
|
|
|
||
|
|
// MaxResponseSize is the maximum size (in bytes) of any response that Sarama will attempt to parse. If
|
||
|
|
// a broker returns a response message larger than this value, Sarama will return a PacketDecodingError to
|
||
|
|
// protect the client from running out of memory. Please note that brokers do not have any natural limit on
|
||
|
|
// the size of responses they send. In particular, they can send arbitrarily large fetch responses to consumers
|
||
|
|
// (see https://issues.apache.org/jira/browse/KAFKA-2063).
|
||
|
|
var MaxResponseSize int32 = 100 * 1024 * 1024
|