Package io.vertx.rxjava3.kafka.client.producer

## Class KafkaProducer<K,​V>

- java.lang.Object
- - io.vertx.rxjava3.kafka.client.producer.KafkaProducer<K,​V>

- All Implemented Interfaces:
    `StreamBase`, `WriteStream<KafkaProducerRecord<K,​V>>`

      public class KafkaProducer<K,​V>
      extends Object
      implements WriteStream<KafkaProducerRecord<K,​V>>

  Vert.x Kafka producer.

  The `WriteStream.write(T)` provides global control over writing a record.

  NOTE: This class has been automatically generated from the `original` non RX-ified interface using Vert.x codegen.

- - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `static io.vertx.lang.rx.TypeArg<KafkaProducer>` | `__TYPE_ARG` |
    `io.vertx.lang.rx.TypeArg<K>` | `__typeArg_0` |
    `io.vertx.lang.rx.TypeArg<V>` | `__typeArg_1` |

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `KafkaProducer​(KafkaProducer delegate)` |
    `KafkaProducer​(Object delegate, io.vertx.lang.rx.TypeArg<K> typeArg_0, io.vertx.lang.rx.TypeArg<V> typeArg_1)` |

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `Completable` | `abortTransaction()` | Aborts the ongoing transaction.
    `Completable` | `beginTransaction()` | Starts a new kafka transaction.
    `Completable` | `close()` | Close the producer
    `Completable` | `close​(long timeout)` | Close the producer
    `Completable` | `commitTransaction()` | Commits the ongoing transaction.
    `static <K,​V> KafkaProducer<K,​V>` | `create​(Vertx vertx, Map<String,​String> config)` | Create a new KafkaProducer instance
    `static <K,​V> KafkaProducer<K,​V>` | `create​(Vertx vertx, Map<String,​String> config, Class<K> keyType, Class<V> valueType)` | Create a new KafkaProducer instance
    `static <K,​V> KafkaProducer<K,​V>` | `create​(Vertx vertx, org.apache.kafka.clients.producer.Producer<K,​V> producer)` | Create a new KafkaProducer instance from a native .
    `static <K,​V> KafkaProducer<K,​V>` | `create​(Vertx vertx, org.apache.kafka.clients.producer.Producer<K,​V> producer, KafkaClientOptions options)` | Create a new KafkaProducer instance from a native .
    `static <K,​V> KafkaProducer<K,​V>` | `createShared​(Vertx vertx, String name, KafkaClientOptions options)` | Get or create a KafkaProducer instance which shares its stream with any other KafkaProducer created with the same `name`
    `static <K,​V> KafkaProducer<K,​V>` | `createShared​(Vertx vertx, String name, KafkaClientOptions options, Class<K> keyType, Class<V> valueType)` | Get or create a KafkaProducer instance which shares its stream with any other KafkaProducer created with the same `name`
    `static <K,​V> KafkaProducer<K,​V>` | `createShared​(Vertx vertx, String name, Map<String,​String> config)` | Get or create a KafkaProducer instance which shares its stream with any other KafkaProducer created with the same `name`
    `static <K,​V> KafkaProducer<K,​V>` | `createShared​(Vertx vertx, String name, Map<String,​String> config, Class<K> keyType, Class<V> valueType)` | Get or create a KafkaProducer instance which shares its stream with any other KafkaProducer created with the same `name`
    `KafkaProducer<K,​V>` | `drainHandler​(Handler<Void> handler)` | Set a drain handler on the stream.
    `Completable` | `end()` | Ends the stream.
    `Completable` | `end​(KafkaProducerRecord<K,​V> data)` | Same as `WriteStream.end()` but writes some data to the stream before ending.
    `boolean` | `equals​(Object o)` |
    `KafkaProducer<K,​V>` | `exceptionHandler​(Handler<Throwable> handler)` | Set an exception handler on the write stream.
    `Completable` | `flush()` | Invoking this method makes all buffered records immediately available to write
    `KafkaProducer` | `getDelegate()` |
    `int` | `hashCode()` |
    `Completable` | `initTransactions()` | Initializes the underlying kafka transactional producer.
    `static <K,​V> KafkaProducer<K,​V>` | `newInstance​(KafkaProducer arg)` |
    `static <K,​V> KafkaProducer<K,​V>` | `newInstance​(KafkaProducer arg, io.vertx.lang.rx.TypeArg<K> __typeArg_K, io.vertx.lang.rx.TypeArg<V> __typeArg_V)` |
    `Single<List<PartitionInfo>>` | `partitionsFor​(String topic)` | Get the partition metadata for the give topic.
    `Completable` | `rxAbortTransaction()` | Aborts the ongoing transaction.
    `Completable` | `rxBeginTransaction()` | Starts a new kafka transaction.
    `Completable` | `rxClose()` | Close the producer
    `Completable` | `rxClose​(long timeout)` | Close the producer
    `Completable` | `rxCommitTransaction()` | Commits the ongoing transaction.
    `Completable` | `rxEnd()` | Ends the stream.
    `Completable` | `rxEnd​(KafkaProducerRecord<K,​V> data)` | Same as `WriteStream.end()` but writes some data to the stream before ending.
    `Completable` | `rxFlush()` | Invoking this method makes all buffered records immediately available to write
    `Completable` | `rxInitTransactions()` | Initializes the underlying kafka transactional producer.
    `Single<List<PartitionInfo>>` | `rxPartitionsFor​(String topic)` | Get the partition metadata for the give topic.
    `Single<RecordMetadata>` | `rxSend​(KafkaProducerRecord<K,​V> record)` | Asynchronously write a record to a topic
    `Completable` | `rxWrite​(KafkaProducerRecord<K,​V> data)` | Write some data to the stream.
    `Single<RecordMetadata>` | `send​(KafkaProducerRecord<K,​V> record)` | Asynchronously write a record to a topic
    `KafkaProducer<K,​V>` | `setWriteQueueMaxSize​(int i)` | Set the maximum size of the write queue to `maxSize`.
    `WriteStreamObserver<KafkaProducerRecord<K,​V>>` | `toObserver()` |
    `String` | `toString()` |
    `WriteStreamSubscriber<KafkaProducerRecord<K,​V>>` | `toSubscriber()` |
    `Completable` | `write​(KafkaProducerRecord<K,​V> data)` | Write some data to the stream.
    `boolean` | `writeQueueFull()` | This will return `true` if there are more bytes in the write queue than the value set using `setWriteQueueMaxSize(int)`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### __TYPE_ARG

          public static final io.vertx.lang.rx.TypeArg<KafkaProducer> __TYPE_ARG

    - #### __typeArg_0

          public final io.vertx.lang.rx.TypeArg<K> __typeArg_0

    - #### __typeArg_1

          public final io.vertx.lang.rx.TypeArg<V> __typeArg_1

  - ### Constructor Detail

    - #### KafkaProducer

          public KafkaProducer​(KafkaProducer delegate)

    - #### KafkaProducer

          public KafkaProducer​(Object delegate,
                               io.vertx.lang.rx.TypeArg<K> typeArg_0,
                               io.vertx.lang.rx.TypeArg<V> typeArg_1)

  - ### Method Detail

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`

    - #### equals

          public boolean equals​(Object o)

      Overrides:
        `equals` in class `Object`

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `Object`

    - #### getDelegate

          public KafkaProducer getDelegate()

      Specified by:
        `getDelegate` in interface `StreamBase`
      Specified by:
        `getDelegate` in interface `WriteStream<K>`

    - #### toObserver

          public WriteStreamObserver<KafkaProducerRecord<K,​V>> toObserver()

      Specified by:
        `toObserver` in interface `WriteStream<K>`

    - #### toSubscriber

          public WriteStreamSubscriber<KafkaProducerRecord<K,​V>> toSubscriber()

      Specified by:
        `toSubscriber` in interface `WriteStream<K>`

    - #### write

          public Completable write​(KafkaProducerRecord<K,​V> data)

      Write some data to the stream.

      The data is usually put on an internal write queue, and the write actually happens asynchronously. To avoid running out of memory by putting too much on the write queue, check the `WriteStream.writeQueueFull()` method before writing. This is done automatically if using a .

      When the `data` is moved from the queue to the actual medium, the returned will be completed with the write result, e.g the future is succeeded when a server HTTP response buffer is written to the socket and failed if the remote client has closed the socket while the data was still pending for write.

      Specified by:
        `write` in interface `WriteStream<K>`
      Parameters:
        `data` - the data to write
      Returns:
        a future completed with the write result

    - #### rxWrite

          public Completable rxWrite​(KafkaProducerRecord<K,​V> data)

      Write some data to the stream.

      The data is usually put on an internal write queue, and the write actually happens asynchronously. To avoid running out of memory by putting too much on the write queue, check the `WriteStream.writeQueueFull()` method before writing. This is done automatically if using a .

      When the `data` is moved from the queue to the actual medium, the returned will be completed with the write result, e.g the future is succeeded when a server HTTP response buffer is written to the socket and failed if the remote client has closed the socket while the data was still pending for write.

      Specified by:
        `rxWrite` in interface `WriteStream<K>`
      Parameters:
        `data` - the data to write
      Returns:
        a future completed with the write result

    - #### end

          public Completable end()

      Ends the stream.

      Once the stream has ended, it cannot be used any more.

      Specified by:
        `end` in interface `WriteStream<K>`
      Returns:
        a future completed with the result

    - #### rxEnd

          public Completable rxEnd()

      Ends the stream.

      Once the stream has ended, it cannot be used any more.

      Specified by:
        `rxEnd` in interface `WriteStream<K>`
      Returns:
        a future completed with the result

    - #### end

          public Completable end​(KafkaProducerRecord<K,​V> data)

      Same as `WriteStream.end()` but writes some data to the stream before ending.
      Specified by:
        `end` in interface `WriteStream<K>`
      Parameters:
        `data` - the data to write
      Returns:
        a future completed with the result

    - #### rxEnd

          public Completable rxEnd​(KafkaProducerRecord<K,​V> data)

      Same as `WriteStream.end()` but writes some data to the stream before ending.
      Specified by:
        `rxEnd` in interface `WriteStream<K>`
      Parameters:
        `data` - the data to write
      Returns:
        a future completed with the result

    - #### writeQueueFull

          public boolean writeQueueFull()

      This will return `true` if there are more bytes in the write queue than the value set using `setWriteQueueMaxSize(int)`
      Specified by:
        `writeQueueFull` in interface `WriteStream<K>`
      Returns:
        `true` if write queue is full

    - #### createShared

          public static <K,​V> KafkaProducer<K,​V> createShared​(Vertx vertx,
                                                                          String name,
                                                                          Map<String,​String> config)

      Get or create a KafkaProducer instance which shares its stream with any other KafkaProducer created with the same `name`

      When `close` has been called for each shared producer the resources will be released. Calling `end` closes all shared producers.

      Parameters:
        `vertx` - Vert.x instance to use
        `name` - the producer name to identify it
        `config` - Kafka producer configuration
      Returns:
        an instance of the KafkaProducer

    - #### createShared

          public static <K,​V> KafkaProducer<K,​V> createShared​(Vertx vertx,
                                                                          String name,
                                                                          KafkaClientOptions options)

      Get or create a KafkaProducer instance which shares its stream with any other KafkaProducer created with the same `name`

      When `close` has been called for each shared producer the resources will be released. Calling `end` closes all shared producers.

      Parameters:
        `vertx` - Vert.x instance to use
        `name` - the producer name to identify it
        `options` - Kafka producer options
      Returns:
        an instance of the KafkaProducer

    - #### createShared

          public static <K,​V> KafkaProducer<K,​V> createShared​(Vertx vertx,
                                                                          String name,
                                                                          Map<String,​String> config,
                                                                          Class<K> keyType,
                                                                          Class<V> valueType)

      Get or create a KafkaProducer instance which shares its stream with any other KafkaProducer created with the same `name`

      When `close` has been called for each shared producer the resources will be released. Calling `end` closes all shared producers.

      Parameters:
        `vertx` - Vert.x instance to use
        `name` - the producer name to identify it
        `config` - Kafka producer configuration
        `keyType` - class type for the key serialization
        `valueType` - class type for the value serialization
      Returns:
        an instance of the KafkaProducer

    - #### createShared

          public static <K,​V> KafkaProducer<K,​V> createShared​(Vertx vertx,
                                                                          String name,
                                                                          KafkaClientOptions options,
                                                                          Class<K> keyType,
                                                                          Class<V> valueType)

      Get or create a KafkaProducer instance which shares its stream with any other KafkaProducer created with the same `name`

      When `close` has been called for each shared producer the resources will be released. Calling `end` closes all shared producers.

      Parameters:
        `vertx` - Vert.x instance to use
        `name` - the producer name to identify it
        `options` - Kafka producer options
        `keyType` - class type for the key serialization
        `valueType` - class type for the value serialization
      Returns:
        an instance of the KafkaProducer

    - #### create

          public static <K,​V> KafkaProducer<K,​V> create​(Vertx vertx,
                                                                    Map<String,​String> config)

      Create a new KafkaProducer instance
      Parameters:
        `vertx` - Vert.x instance to use
        `config` - Kafka producer configuration
      Returns:
        an instance of the KafkaProducer

    - #### create

          public static <K,​V> KafkaProducer<K,​V> create​(Vertx vertx,
                                                                    Map<String,​String> config,
                                                                    Class<K> keyType,
                                                                    Class<V> valueType)

      Create a new KafkaProducer instance
      Parameters:
        `vertx` - Vert.x instance to use
        `config` - Kafka producer configuration
        `keyType` - class type for the key serialization
        `valueType` - class type for the value serialization
      Returns:
        an instance of the KafkaProducer

    - #### initTransactions

          public Completable initTransactions()

      Initializes the underlying kafka transactional producer. See `initTransactions()` ()}
      Returns:
        a future notified with the result

    - #### rxInitTransactions

          public Completable rxInitTransactions()

      Initializes the underlying kafka transactional producer. See `initTransactions()` ()}
      Returns:
        a future notified with the result

    - #### beginTransaction

          public Completable beginTransaction()

      Starts a new kafka transaction. See `beginTransaction()`
      Returns:
        a future notified with the result

    - #### rxBeginTransaction

          public Completable rxBeginTransaction()

      Starts a new kafka transaction. See `beginTransaction()`
      Returns:
        a future notified with the result

    - #### commitTransaction

          public Completable commitTransaction()

      Commits the ongoing transaction. See `commitTransaction()`
      Returns:
        a future notified with the result

    - #### rxCommitTransaction

          public Completable rxCommitTransaction()

      Commits the ongoing transaction. See `commitTransaction()`
      Returns:
        a future notified with the result

    - #### abortTransaction

          public Completable abortTransaction()

      Aborts the ongoing transaction. See `KafkaProducer`
      Returns:
        a future notified with the result

    - #### rxAbortTransaction

          public Completable rxAbortTransaction()

      Aborts the ongoing transaction. See `KafkaProducer`
      Returns:
        a future notified with the result

    - #### exceptionHandler

          public KafkaProducer<K,​V> exceptionHandler​(Handler<Throwable> handler)

      Description copied from interface: `WriteStream`
      Set an exception handler on the write stream.
      Specified by:
        `exceptionHandler` in interface `StreamBase`
      Specified by:
        `exceptionHandler` in interface `WriteStream<K>`
      Parameters:
        `handler` - the exception handler
      Returns:
        a reference to this, so the API can be used fluently

    - #### setWriteQueueMaxSize

          public KafkaProducer<K,​V> setWriteQueueMaxSize​(int i)

      Description copied from interface: `WriteStream`
      Set the maximum size of the write queue to `maxSize`. You will still be able to write to the stream even if there is more than `maxSize` items in the write queue. This is used as an indicator by classes such as `Pipe` to provide flow control.

      The value is defined by the implementation of the stream, e.g in bytes for a `NetSocket`, etc...
      Specified by:
        `setWriteQueueMaxSize` in interface `WriteStream<K>`
      Parameters:
        `i` - the max size of the write stream
      Returns:
        a reference to this, so the API can be used fluently

    - #### drainHandler

          public KafkaProducer<K,​V> drainHandler​(Handler<Void> handler)

      Description copied from interface: `WriteStream`
      Set a drain handler on the stream. If the write queue is full, then the handler will be called when the write queue is ready to accept buffers again. See `Pipe` for an example of this being used.

      The stream implementation defines when the drain handler, for example it could be when the queue size has been reduced to `maxSize / 2`.

      Specified by:
        `drainHandler` in interface `WriteStream<K>`
      Parameters:
        `handler` - the handler
      Returns:
        a reference to this, so the API can be used fluently

    - #### send

          public Single<RecordMetadata> send​(KafkaProducerRecord<K,​V> record)

      Asynchronously write a record to a topic
      Parameters:
        `record` - record to write
      Returns:
        a `Future` completed with the record metadata

    - #### rxSend

          public Single<RecordMetadata> rxSend​(KafkaProducerRecord<K,​V> record)

      Asynchronously write a record to a topic
      Parameters:
        `record` - record to write
      Returns:
        a `Future` completed with the record metadata

    - #### partitionsFor

          public Single<List<PartitionInfo>> partitionsFor​(String topic)

      Get the partition metadata for the give topic.
      Parameters:
        `topic` - topic partition for which getting partitions info
      Returns:
        a future notified with the result

    - #### rxPartitionsFor

          public Single<List<PartitionInfo>> rxPartitionsFor​(String topic)

      Get the partition metadata for the give topic.
      Parameters:
        `topic` - topic partition for which getting partitions info
      Returns:
        a future notified with the result

    - #### flush

          public Completable flush()

      Invoking this method makes all buffered records immediately available to write
      Returns:
        a future notified with the result

    - #### rxFlush

          public Completable rxFlush()

      Invoking this method makes all buffered records immediately available to write
      Returns:
        a future notified with the result

    - #### close

          public Completable close()

      Close the producer
      Returns:
        a `Future` completed with the operation result

    - #### rxClose

          public Completable rxClose()

      Close the producer
      Returns:
        a `Future` completed with the operation result

    - #### close

          public Completable close​(long timeout)

      Close the producer
      Parameters:
        `timeout` -
      Returns:
        a future notified with the result

    - #### rxClose

          public Completable rxClose​(long timeout)

      Close the producer
      Parameters:
        `timeout` -
      Returns:
        a future notified with the result

    - #### create

          public static <K,​V> KafkaProducer<K,​V> create​(Vertx vertx,
                                                                    org.apache.kafka.clients.producer.Producer<K,​V> producer)

      Create a new KafkaProducer instance from a native .
      Parameters:
        `vertx` - Vert.x instance to use
        `producer` - the Kafka producer to wrap
      Returns:
        an instance of the KafkaProducer

    - #### create

          public static <K,​V> KafkaProducer<K,​V> create​(Vertx vertx,
                                                                    org.apache.kafka.clients.producer.Producer<K,​V> producer,
                                                                    KafkaClientOptions options)

      Create a new KafkaProducer instance from a native .
      Parameters:
        `vertx` - Vert.x instance to use
        `producer` - the Kafka producer to wrap
        `options` - options used only for tracing settings
      Returns:
        an instance of the KafkaProducer

    - #### newInstance

          public static <K,​V> KafkaProducer<K,​V> newInstance​(KafkaProducer arg)

    - #### newInstance

          public static <K,​V> KafkaProducer<K,​V> newInstance​(KafkaProducer arg,
                                                                         io.vertx.lang.rx.TypeArg<K> __typeArg_K,
                                                                         io.vertx.lang.rx.TypeArg<V> __typeArg_V)