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# Module: Vertx::WriteStream

Includes:
  StreamBase
Included in:
  AsyncFile, HttpClientRequest, HttpServerResponse, MessageProducer, NetSocket, PacketWritestream, WebSocketBase, WriteStreamImpl
Defined in:
  /Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/src/main/resources/vertx/write_stream.rb

## Instance Method Summary (collapse)

- - (self) drain_handler { ... }
  Set a drain handler on the stream.
- - (self) exception_handler { ... }
  Set an exception handler on the write stream.
- - (self) set_write_queue_max_size(maxSize = nil)
  Set the maximum size of the write queue to maxSize.
- - (self) write(data = nil)
  Write some data to the stream.
- - (true, false) write_queue_full?
  This will return true if there are more bytes in the write queue than the value set using #set_write_queue_max_size.

## Instance Method Details

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

Set a drain handler on the stream. If the write queue is full, then the handler will be called when the write queue has been reduced to maxSize / 2. See Pump for an example of this being used.

Yields:

- the handler

Returns:

- (`self`)

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/src/main/resources/vertx/write_stream.rb', line 53

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

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

Set an exception handler on the write stream.

Yields:

- the exception handler

Returns:

- (`self`)

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/src/main/resources/vertx/write_stream.rb', line 10

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

### - (`self`) set_write_queue_max_size(maxSize = nil)

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` bytes in the write queue. This is used as an indicator by classes such as `Pump` to provide flow control.

Parameters:

- maxSize (`Fixnum`) (defaults to: `nil`) —
  the max size of the write stream

Returns:

- (`self`)

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/src/main/resources/vertx/write_stream.rb', line 34

    def set_write_queue_max_size(maxSize=nil)
      if maxSize.class == Fixnum && !block_given?
        @j_del.java_method(:setWriteQueueMaxSize, [Java::int.java_class]).call(maxSize)
        return self
      end
      raise ArgumentError, "Invalid arguments when calling set_write_queue_max_size(maxSize)"
    end

### - (`self`) write(data = nil)

Write some data to the stream. The data is 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 #write_queue_full method before writing. This is done automatically if using a Pump.

Parameters:

- data (`Object`) (defaults to: `nil`) —
  the data to write

Returns:

- (`self`)

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/src/main/resources/vertx/write_stream.rb', line 22

    def write(data=nil)
      if (data.class == String  || data.class == Hash || data.class == Array || data.class == NilClass || data.class == TrueClass || data.class == FalseClass || data.class == Fixnum || data.class == Float) && !block_given?
        @j_del.java_method(:write, [Java::java.lang.Object.java_class]).call(::Vertx::Util::Utils.to_object(data))
        return self
      end
      raise ArgumentError, "Invalid arguments when calling write(data)"
    end

### - (`true`, `false`) write_queue_full?

This will return `true` if there are more bytes in the write queue than the value set using #set_write_queue_max_size

Returns:

- (`true`, `false`) —
  true if write queue is full

Raises:

- (`ArgumentError`)

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    # File '/Users/julien/java/vertx-aggregator/modules/vertx-lang-ruby/src/main/resources/vertx/write_stream.rb', line 43

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