VOL-2496 Add "event listen" command to voltctl
Change-Id: I8f1fb34b55f56c8125142ac289e2f19fc170d804
diff --git a/vendor/github.com/Shopify/sarama/sarama.go b/vendor/github.com/Shopify/sarama/sarama.go
new file mode 100644
index 0000000..1e0277a
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+++ b/vendor/github.com/Shopify/sarama/sarama.go
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+/*
+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 Consumer or Consumer-Group API.
+
+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
+
+Metrics are exposed through https://github.com/rcrowley/go-metrics library in a local registry.
+
+Broker related metrics:
+
+ +----------------------------------------------+------------+---------------------------------------------------------------+
+ | Name | Type | Description |
+ +----------------------------------------------+------------+---------------------------------------------------------------+
+ | incoming-byte-rate | meter | Bytes/second read off all brokers |
+ | incoming-byte-rate-for-broker-<broker-id> | meter | Bytes/second read off a given broker |
+ | outgoing-byte-rate | meter | Bytes/second written off all brokers |
+ | outgoing-byte-rate-for-broker-<broker-id> | meter | Bytes/second written off a given broker |
+ | request-rate | meter | Requests/second sent to all brokers |
+ | request-rate-for-broker-<broker-id> | meter | Requests/second sent to a given broker |
+ | request-size | histogram | Distribution of the request size in bytes for all brokers |
+ | request-size-for-broker-<broker-id> | histogram | Distribution of the request size in bytes for a given broker |
+ | request-latency-in-ms | histogram | Distribution of the request latency in ms for all brokers |
+ | request-latency-in-ms-for-broker-<broker-id> | histogram | Distribution of the request latency in ms for a given broker |
+ | response-rate | meter | Responses/second received from all brokers |
+ | response-rate-for-broker-<broker-id> | meter | Responses/second received from a given broker |
+ | response-size | histogram | Distribution of the response size in bytes for all brokers |
+ | response-size-for-broker-<broker-id> | histogram | Distribution of the response size in bytes for a given broker |
+ +----------------------------------------------+------------+---------------------------------------------------------------+
+
+Note that we do not gather specific metrics for seed brokers but they are part of the "all brokers" metrics.
+
+Producer related metrics:
+
+ +-------------------------------------------+------------+--------------------------------------------------------------------------------------+
+ | Name | Type | Description |
+ +-------------------------------------------+------------+--------------------------------------------------------------------------------------+
+ | batch-size | histogram | Distribution of the number of bytes sent per partition per request for all topics |
+ | batch-size-for-topic-<topic> | histogram | Distribution of the number of bytes sent per partition per request for a given topic |
+ | record-send-rate | meter | Records/second sent to all topics |
+ | record-send-rate-for-topic-<topic> | meter | Records/second sent to a given topic |
+ | records-per-request | histogram | Distribution of the number of records sent per request for all topics |
+ | records-per-request-for-topic-<topic> | histogram | Distribution of the number of records sent per request for a given topic |
+ | compression-ratio | histogram | Distribution of the compression ratio times 100 of record batches for all topics |
+ | compression-ratio-for-topic-<topic> | histogram | Distribution of the compression ratio times 100 of record batches for a given topic |
+ +-------------------------------------------+------------+--------------------------------------------------------------------------------------+
+
+Consumer related metrics:
+
+ +-------------------------------------------+------------+--------------------------------------------------------------------------------------+
+ | Name | Type | Description |
+ +-------------------------------------------+------------+--------------------------------------------------------------------------------------+
+ | consumer-batch-size | histogram | Distribution of the number of messages in a batch |
+ +-------------------------------------------+------------+--------------------------------------------------------------------------------------+
+
+*/
+package sarama
+
+import (
+ "io/ioutil"
+ "log"
+)
+
+var (
+ // 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.
+ Logger StdLogger = log.New(ioutil.Discard, "[Sarama] ", log.LstdFlags)
+
+ // 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.
+ 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.
+ 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).
+ MaxResponseSize int32 = 100 * 1024 * 1024
+)
+
+// StdLogger is used to log error messages.
+type StdLogger interface {
+ Print(v ...interface{})
+ Printf(format string, v ...interface{})
+ Println(v ...interface{})
+}