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# Module: Vertx::ReadStream

Includes:
  StreamBase
Included in:
  AsyncFile, DatagramSocket, HttpClientRequest, HttpClientResponse, HttpServerFileUpload, HttpServerRequest, JsonParser, MessageConsumer, NetSocket, ReadStreamImpl, RecordParser, TimeoutStream, WebSocketBase, VertxAmqpClient::AmqpReceiver, VertxCassandra::CassandraRowStream, VertxKafkaClient::KafkaConsumer, VertxPgClient::PgChannel, VertxRabbitmq::RabbitMQConsumer, VertxRedis::Redis, VertxSql::SQLRowStream, VertxSqlClient::RowStream, VertxUnit::TestSuiteReport, VertxWeb::SockJSSocket
Defined in:
  /Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/read_stream.rb

## Instance Method Summary (collapse)

- - (self) end_handler { ... }
  Set an end handler.
- - (self) exception_handler { ... }
  Set an exception handler on the read stream.
- - (self) fetch(amount = nil)
  Fetch the specified amount of elements.
- - (self) handler { ... }
  Set a data handler.
- - (self) pause
  Pause the ReadStream, it sets the buffer in fetch mode and clears the actual demand.
- - (::Vertx::Pipe) pipe
  Pause this stream and return a Pipe to transfer the elements of this stream to a destination WriteStream.
- - (void) pipe_to(dst = nil) { ... }
  Pipe this ReadStream to the WriteStream.
- - (self) resume
  Resume reading, and sets the buffer in flowing mode.

## Instance Method Details

### - (`self`) end_handler { ... }

Set an end handler. Once the stream has ended, and there is no more data to be read, this handler will be called.

Yields:

Returns:

- (`self`)

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/read_stream.rb', line 66

    def end_handler
      if block_given?
        @j_del.java_method(:endHandler, [Java::IoVertxCore::Handler.java_class]).call(Proc.new { yield })
        return self
      end
      raise ArgumentError, "Invalid arguments when calling end_handler()"
    end

### - (`self`) exception_handler { ... }

Set an exception handler on the read stream.

Yields:

- the exception handler

Returns:

- (`self`)

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/read_stream.rb', line 12

    def exception_handler
      if block_given?
        @j_del.java_method(:exceptionHandler, [Java::IoVertxCore::Handler.java_class]).call((Proc.new { |event| yield(::Vertx::Util::Utils.from_throwable(event)) }))
        return self
      end
      raise ArgumentError, "Invalid arguments when calling exception_handler()"
    end

### - (`self`) fetch(amount = nil)

Fetch the specified `amount` of elements. If the `ReadStream` has been paused, reading will recommence with the specified `amount` of items, otherwise the specified `amount` will be added to the current stream demand.

Parameters:

- amount (`Fixnum`) (defaults to: `nil`)

Returns:

- (`self`)

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/read_stream.rb', line 56

    def fetch(amount=nil)
      if amount.class == Fixnum && !block_given?
        @j_del.java_method(:fetch, [Java::long.java_class]).call(amount)
        return self
      end
      raise ArgumentError, "Invalid arguments when calling fetch(#{amount})"
    end

### - (`self`) handler { ... }

Set a data handler. As data is read, the handler will be called with the data.

Yields:

Returns:

- (`self`)

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/read_stream.rb', line 22

    def handler
      if block_given?
        @j_del.java_method(:handler, [Java::IoVertxCore::Handler.java_class]).call((Proc.new { |event| yield(@j_arg_T.wrap(event)) }))
        return self
      end
      raise ArgumentError, "Invalid arguments when calling handler()"
    end

### - (`self`) pause

Pause the `ReadStream`, it sets the buffer in `fetch` mode and clears the actual demand.

While it's paused, no data will be sent to the data `handler`.

Returns:

- (`self`)

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/read_stream.rb', line 33

    def pause
      if !block_given?
        @j_del.java_method(:pause, []).call()
        return self
      end
      raise ArgumentError, "Invalid arguments when calling pause()"
    end

### - (`::Vertx::Pipe`) pipe

Pause this stream and return a Pipe to transfer the elements of this stream to a destination WriteStream.

The stream will be resumed when the pipe will be wired to a `WriteStream`.

Returns:

- (`::Vertx::Pipe`) —
  a pipe

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/read_stream.rb', line 77

    def pipe
      if !block_given?
        return ::Vertx::Util::Utils.safe_create(@j_del.java_method(:pipe, []).call(),::Vertx::Pipe, nil)
      end
      raise ArgumentError, "Invalid arguments when calling pipe()"
    end

### - (`void`) pipe_to(dst = nil) { ... }

This method returns an undefined value.

Pipe this `ReadStream` to the `WriteStream`.

Elements emitted by this stream will be written to the write stream until this stream ends or fails.

Once this stream has ended or failed, the write stream will be ended and the `handler` will be called with the result.

Parameters:

- dst (`::Vertx::WriteStream`) (defaults to: `nil`) —
  the destination write stream

Yields:

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/read_stream.rb', line 92

    def pipe_to(dst=nil)
      if dst.class.method_defined?(:j_del) && !block_given?
        return @j_del.java_method(:pipeTo, [Java::IoVertxCoreStreams::WriteStream.java_class]).call(dst.j_del)
      elsif dst.class.method_defined?(:j_del) && block_given?
        return @j_del.java_method(:pipeTo, [Java::IoVertxCoreStreams::WriteStream.java_class,Java::IoVertxCore::Handler.java_class]).call(dst.j_del,(Proc.new { |ar| yield(ar.failed ? ar.cause : nil) }))
      end
      raise ArgumentError, "Invalid arguments when calling pipe_to(#{dst})"
    end

### - (`self`) resume

Resume reading, and sets the buffer in `flowing` mode.

If the `ReadStream` has been paused, reading will recommence on it.

Returns:

- (`self`)

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/vertx-lang-ruby/target/classes/vertx/read_stream.rb', line 44

    def resume
      if !block_given?
        @j_del.java_method(:resume, []).call()
        return self
      end
      raise ArgumentError, "Invalid arguments when calling resume()"
    end