javax.servlet

Interface WriteListener

Contents
  • All Superinterfaces:
    EventListener

    public interface WriteListener
extends EventListener
    Callback notification mechanism that signals to the developer it's possible to write content without blocking.
    Since:
    Servlet 3.1

    • Method Detail

      • onWritePossible

        void onWritePossible()
              throws IOException
        When an instance of the WriteListener is registered with a ServletOutputStream, this method will be invoked by the container the first time when it is possible to write data. Subsequently the container will invoke this method if and only if ServletOutputStream.isReady() method has been called and has returned false.
        Throws:
        IOException - if an I/O related error has occurred during processing

      • onError

        void onError(Throwable t)
        Invoked when an error occurs writing data using the non-blocking APIs.

Document created the 11/06/2005, last modified the 18/08/2025
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