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(ns dvlopt.kafka.-interop.java
"Convert clojure data structures to java objects."
{:author "Adam Helinski"}
(:require [dvlopt.kafka :as K]
[dvlopt.kafka.-interop :as K.-interop]
[dvlopt.kafka.-interop.clj :as K.-interop.clj]
[dvlopt.void :as void])
(:import java.time.Duration
(java.util Map
Properties)
java.util.concurrent.TimeUnit
(org.apache.kafka.clients.admin AlterConfigsOptions
Config
ConfigEntry
CreateAclsOptions
CreatePartitionsOptions
CreateTopicsOptions
DeleteAclsOptions
DeleteRecordsOptions
DeleteTopicsOptions
DescribeAclsOptions
DescribeClusterOptions
DescribeConfigsOptions
DescribeConsumerGroupsOptions
DescribeTopicsOptions
ListConsumerGroupOffsetsOptions
ListConsumerGroupsOptions
ListTopicsOptions
NewPartitions
NewTopic
RecordsToDelete)
(org.apache.kafka.clients.consumer ConsumerRebalanceListener
OffsetAndMetadata
OffsetCommitCallback)
(org.apache.kafka.clients.producer Callback
ProducerRecord)
org.apache.kafka.common.TopicPartition
(org.apache.kafka.common.acl AclBinding
AclBindingFilter
AccessControlEntry
AccessControlEntryFilter
AclOperation
AclPermissionType)
(org.apache.kafka.common.config ConfigResource
ConfigResource$Type)
org.apache.kafka.common.header.Header
(org.apache.kafka.common.resource PatternType
ResourcePattern
ResourcePatternFilter
ResourceType)
(org.apache.kafka.common.serialization ByteArrayDeserializer
ByteArraySerializer
ByteBufferDeserializer
ByteBufferSerializer
DoubleDeserializer
DoubleSerializer
ExtendedDeserializer
ExtendedSerializer
IntegerDeserializer
IntegerSerializer
LongDeserializer
LongSerializer
Serde
Serdes
StringDeserializer
StringSerializer)
(org.apache.kafka.streams KafkaStreams$StateListener
KeyValue
StreamsConfig
Topology$AutoOffsetReset)
(org.apache.kafka.streams.kstream Aggregator
Consumed
ForeachAction
Initializer
Joined
JoinWindows
KeyValueMapper
Materialized
Merger
Predicate
Produced
Reducer
Serialized
SessionWindows
TimeWindows
Transformer
TransformerSupplier
ValueJoiner
ValueMapper
ValueMapperWithKey
ValueTransformerWithKey
ValueTransformerWithKeySupplier
Window
Windowed)
(org.apache.kafka.streams.processor Processor
ProcessorContext
ProcessorSupplier
PunctuationType
Punctuator
StreamPartitioner
TimestampExtractor
TopicNameExtractor)
(org.apache.kafka.streams.state KeyValueBytesStoreSupplier
SessionBytesStoreSupplier
WindowBytesStoreSupplier
StoreBuilder
Stores)))
;; For sorting vars in alpĥabetic order.
(declare access-control-entry
access-control-entry-filter
acl-operation
acl-permission-type
config-entry
header
key-value-bytes-store-supplier--in-memory
key-value-bytes-store-supplier--regular
resource-pattern
resource-pattern-filter
resource-type
stream-partitioner
timestamp-extractor
topic-partition
topology$auto-offset-reset
session-bytes-store-supplier
window-bytes-store-supplier)
;;;;;;;;;; Private
(def -*store-number
;; Keeping track of the number of stores for generating store names.
(atom -1))
(defn- -record-from-ctx
;; Used when a record needs to be presented from a Kafka Streams context.
;;
;; Contains what is needed besides the key and the value.
[^ProcessorContext ctx]
(void/assoc-some {::K/offset (.offset ctx)
::K/partition (.partition ctx)
::K/timestamp (.timestamp ctx)
::K/topic (.topic ctx)}
::K/headers (K.-interop.clj/headers (.headers ctx))))
(defn- -required-arg
;; Throw if the value is nil.
;; For missing mandatory arguments.
[kw arg]
(when (nil? arg)
(throw (IllegalArgumentException. (str kw " property must be provided."))))
arg)
(defn- -store-name
;; Generates a name for a state store.
[]
(format "dvlopt.kafka-store-%08d"
(swap! -*store-number
inc)))
;;;;;;;;;; Java standard library
(defn duration
^Duration
[[^long interval unit]]
(condp identical?
unit
:nanoseconds (Duration/ofNanos interval)
:microseconds (Duration/ofNanos (* 1000
interval))
:milliseconds (Duration/ofMillis interval)
:seconds (Duration/ofSeconds interval)
:minutes (Duration/ofMinutes interval)
:hours (Duration/ofHours interval)
:days (Duration/ofDays interval)))
(defn thread$uncaught-exception-handler
;; Used by `dvlopt.kstreams/app`.
^Thread$UncaughtExceptionHandler
[f]
(reify
Thread$UncaughtExceptionHandler
(uncaughtException [_ thread exception]
(f exception
thread))))
(defn time-unit
^TimeUnit
[unit]
(condp identical?
unit
:nanoseconds TimeUnit/NANOSECONDS
:microseconds TimeUnit/MICROSECONDS
:milliseconds TimeUnit/MILLISECONDS
:seconds TimeUnit/SECONDS
:minutes TimeUnit/MINUTES
:hours TimeUnit/HOURS
:days TimeUnit/DAYS))
(defn to-milliseconds
;; For when the java library requires milliseconds.
^long
[[interval unit]]
(.convert TimeUnit/MILLISECONDS
interval
(time-unit unit)))
;;;;;;;;;; org.apache.kafka.clients.admin.*
(defn admin-timeout
;; Helper for all admin functions accepting a timeout.
^Integer
[options]
(when-let [timeout (::K/timeout options)]
(Integer. (to-milliseconds timeout))))
(defn alter-configs-options
;; Options for `dvlopt.kafka.admin/alter-configuration`.
;;
;; .shouldValidate looks a bit useless.
^AlterConfigsOptions
[options]
(let [aco (AlterConfigsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs aco))
aco))
(defn config
;; Cf. `dvlopt.kafka.admin/alter-configuration`
^Config
[entries]
(Config. (map config-entry
entries)))
(defn config-entry
;; Cf. `config`
(^ConfigEntry
[[kw value]]
(config-entry kw
value))
(^ConfigEntry
[kw value]
(ConfigEntry. (name kw)
(str value))))
(defn create-acls-options
;; Options for `dvlopt.kafka.admin/create-acls`.
^CreateAclsOptions
[options]
(let [cao (CreateAclsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs cao))
cao))
(defn create-partitions-options
;; "Options for `milena.admin/create-partitions`.
;;
;; .shouldValidate looks a bit useless.
^CreatePartitionsOptions
[options]
(let [cto (CreatePartitionsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs cto))
cto))
(defn create-topics-options
;; Options for `milena.admin/topics-create`.
;;
;; .shouldValidate looks a bit useless.
^CreateTopicsOptions
[options]
(let [cto (CreateTopicsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs cto))
cto))
(defn delete-acls-options
;; Options for `dvlopt.kafka.admin/delete-acls`.
^DeleteAclsOptions
[options]
(let [dao (DeleteAclsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs dao))
dao))
(defn delete-records-options
;; Options for `dvlopt.kafka.admin/delete-records`.
^DeleteRecordsOptions
[options]
(let [dro (DeleteRecordsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs dro))
dro))
(defn delete-topics-options
;; Options for `milena.admin/delete-topics`.
^DeleteTopicsOptions
[options]
(let [dto (DeleteTopicsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs dto))
dto))
(defn describe-acls-options
;; Options for `dvlopt.kafka.admin/acls`.
^DescribeAclsOptions
[options]
(let [dao (DescribeAclsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs dao))
dao))
(defn describe-cluster-options
;; Options for `dvlopt.kafka.admin/cluster`.
^DescribeClusterOptions
[options]
(let [dco (DescribeClusterOptions.)]
(some->> (admin-timeout options)
(.timeoutMs dco))
dco))
(defn describe-configs-options
;; Options for `dvlopt.kafka.admin/configuration`.
^DescribeConfigsOptions
[options]
(let [dco (DescribeConfigsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs dco))
dco))
(defn describe-consumer-groups-options
;; Options for `dvlopt.kafka.admin/describe-consumer-groups`.
[options]
(let [dcgo (DescribeConsumerGroupsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs dcgo))
dcgo))
(defn describe-topics-options
;; Options for `dvlopt.kafka.admin/describe-topics`.
^DescribeTopicsOptions
[options]
(let [dto (DescribeTopicsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs dto))
dto))
(defn list-consumer-group-offsets-options
;; Options for `dvlopt.kafka.admin/consumer-group-offsets`.
^ListConsumerGroupOffsetsOptions
[options]
(let [lcgo (ListConsumerGroupOffsetsOptions.)]
(some->> (admin-timeout lcgo)
(.timeoutMs lcgo))
(when-let [topic-partitions (::K/topic-partitions options)]
(.topicPartitions lcgo
(map topic-partition
topic-partitions)))
lcgo))
(defn list-consumer-groups-options
;; Options for `dvlopt.kafka.admin/consumer-groups`.
^ListConsumerGroupsOptions
[{:as options
:keys [timeout]}]
(doto (ListConsumerGroupsOptions.)
(.timeoutMs (Integer. (to-milliseconds timeout)))))
(defn list-topics-options
;; Options for `dvlopt.kafka.admin/topics`.
^ListTopicsOptions
[options]
(let [lto (ListTopicsOptions.)]
(some->> (admin-timeout options)
(.timeoutMs lto))
(.listInternal lto
(void/obtain ::K/internal?
options
K/defaults))
lto))
(defn new-partitions
;; Cf. `dvlopt.kafka.admin/increase-partitions`
^NewPartitions
[options]
(NewPartitions/increaseTo (:dvlopt.kafka.admin/number-of-partitions options)
(:dvlopt.kafka.admin/replica-assigments options)))
(defn new-topic
;; Options for `dvlopt.kafka.admin/create-topics`.
^NewTopic
[topic options]
(let [new-topic (if-let [replica-assignments (:dvlopt.kafka.admin/replica-assigments options)]
(NewTopic. topic
replica-assignments)
(NewTopic. topic
(void/obtain :dvlopt.kafka.admin/number-of-partitions
options
K/defaults)
(void/obtain :dvlopt.kafka.admin/replication-factor
options
K/defaults)))]
(some->> (:dvlopt.kafka.admin/configuration.topic options)
(.configs new-topic))
new-topic))
(defn records-to-delete
;; Cf. `dvlopt.kafka.admin/delete-records`
^RecordsToDelete
[^long offset]
(RecordsToDelete/beforeOffset offset))
;;;;;;;;;; org.apache.kafka.clients.consumer.*
(defn consumer-rebalance-listener
;; Cf. `dvlopt.kafka.in/register-for`
^ConsumerRebalanceListener
[f]
(reify
ConsumerRebalanceListener
(onPartitionsAssigned [_ tps]
(f :assignment
(map K.-interop.clj/topic-partition
tps)))
(onPartitionsRevoked [_ tps]
(f :revocation
(map K.-interop.clj/topic-partition
tps)))))
(defn offset-commit-callback
;; Cf. `dvlopt.kafka.in/commit-offsets-async`
^OffsetCommitCallback
[f]
(reify
OffsetCommitCallback
(onComplete [_ offsets exception]
(f exception
(reduce (fn [offsets' [tp ^OffsetAndMetadata om]]
(assoc offsets'
(K.-interop.clj/topic-partition tp)
(.offset om)))
{}
offsets)))))
(defn topic-partition->offset-and-metadata
;; Cf. `dvlopt.kafka.in/commit-offsets-async`
^Map
[tp->o]
(reduce-kv (fn reduce-topic-partitions [offsets' tp offset]
(assoc offsets'
(topic-partition tp)
(OffsetAndMetadata. offset)))
{}
tp->o))
;;;;;;;;;; org.apache.kafka.clients.producer.*
(defn callback
;; Cf. `dvlopt.kafka.out/send`
^Callback
[f]
(reify
Callback
(onCompletion [_ r-m exception]
(f exception
(some-> r-m
(K.-interop.clj/record-metadata))))))
(defn producer-record
;; Cf. `dvlopt.kafka.out/send`
^ProducerRecord
[record]
(ProducerRecord. (::K/topic record)
(some-> (::K/partition record)
int)
(::K/timestamp record)
(::K/key record)
(::K/value record)
(map header
(::K/headers record))))
;;;;;;;;;; org.apache.kafka.common.*
(defn topic-partition
;; Used very often, about everywhere.
(^TopicPartition
[[topic partition]]
(topic-partition topic
partition))
(^TopicPartition
[topic partition]
(TopicPartition. topic
(int partition))))
;;;;;;;;;; org.apache.kafka.common.acl.*
(defn access-control-entry
;; Cf. `acl-binding`
^AccessControlEntry
[options]
(AccessControlEntry. (:dvlopt.kafka.admin/principal options)
(or (::K/host options)
"*")
(acl-operation (void/obtain :dvlopt.kafka.admin/operation
options
K/defaults))
(acl-permission-type (void/obtain :dvlopt.kafka.admin/permission
options
K/defaults))))
(defn access-control-entry-filter
;; Cf. `acl-binding-filter`
^AccessControlEntryFilter
[options]
(AccessControlEntryFilter. (:dvlopt.kafka.admin/principal options)
(or (::K/host options)
"*")
(acl-operation (void/obtain :dvlopt.kafka.admin/operation
options
K/defaults))
(acl-permission-type (void/obtain :dvlopt.kafka.admin/permission
options
K/defaults))))
(defn acl-binding
;; Cf. `dvlopt.kafka.admin/create-acls`
^AclBinding
[options]
(AclBinding. (resource-pattern options)
(access-control-entry options)))
(defn acl-binding-filter
;; Cf. `dvlopt.kafka.admin/acls`
^AclBindingFilter
[options]
(AclBindingFilter. (resource-pattern-filter options)
(access-control-entry-filter options)))
(defn acl-operation
^AclOperation
[kw]
(condp identical?
kw
nil AclOperation/ALL
:all AclOperation/ALL
:alter AclOperation/ALTER
:alter-configuration AclOperation/ALTER_CONFIGS
:any AclOperation/ANY
:cluster-action AclOperation/CLUSTER_ACTION
:create AclOperation/CREATE
:delete AclOperation/DELETE
:describe AclOperation/DESCRIBE
:describe-configuration AclOperation/DESCRIBE_CONFIGS
:idempotent-write AclOperation/IDEMPOTENT_WRITE
:read AclOperation/READ
:unknown AclOperation/UNKNOWN
:write AclOperation/WRITE))
(defn acl-permission-type
^AclPermissionType
[kw]
(condp identical?
kw
nil AclPermissionType/ANY
:any AclPermissionType/ANY
:allow AclPermissionType/ALLOW
:deny AclPermissionType/DENY
:unknown AclPermissionType/UNKNOWN))
;;;;;;;;;; org.apache.kafka.common.config.*
(defn config-resource$type
;; Cf. `config-resources`
^ConfigResource$Type
[kw]
(condp identical?
kw
nil ConfigResource$Type/UNKNOWN
::K/brokers ConfigResource$Type/BROKER
::K/topics ConfigResource$Type/TOPIC))
(defn config-resources
;; Cf. `dvlopt.kafka.admin/configuration`
[resources]
(reduce-kv (fn resources-by-type [resources' type names]
(let [type' (config-resource$type type)]
(into resources'
(map (fn map-names [name]
(ConfigResource. type'
name))
names))))
[]
resources))
;;;;;;;;;; org.apache.kafka.common.header.*
(defn header
;; Used for producing records.
(^Header
[[k v]]
(header k
v))
(^Header
[k v]
(reify
Header
(key [_]
k)
(value [_]
v))))
;;;;;;;;;; org.apache.kafka.common.resource.*
(defn pattern-type
^PatternType
[kw]
(condp identical?
kw
nil PatternType/ANY
:any PatternType/ANY
:exactly PatternType/LITERAL
:match PatternType/MATCH
:prefixed PatternType/PREFIXED
:unknown PatternType/UNKNOWN))
(defn resource-pattern
;; Cf. `dvlopt.kafka.admin/create-acls`
^ResourcePattern
[options]
(let [[pattern-type
resource-name] (void/obtain :dvlopt.kafka.admin/name-pattern
options
K/defaults)]
(ResourcePattern. (resource-type (void/obtain :dvlopt.kafka.admin/resource-type
options
K/defaults))
(or resource-name
ResourcePattern/WILDCARD_RESOURCE)
(pattern-type pattern-type))))
(defn resource-pattern-filter
;; Cf. `dvlopt.kafka.admin/acls`
^ResourcePatternFilter
[options]
(let [[pattern-type