Package org.elasticsearch.nio

Class EventHandler

java.lang.Object
org.elasticsearch.nio.EventHandler
public class EventHandler
extends java.lang.Object

  • Field Summary

    Fields 
    Modifier and Type Field Description
    protected java.util.function.Consumer<java.lang.Exception> exceptionHandler  

  • Constructor Summary

    Constructors 
    Constructor Description
    EventHandler​(java.util.function.Consumer<java.lang.Exception> exceptionHandler, java.util.function.Supplier<NioSelector> selectorSupplier)  

  • Method Summary

    Modifier and Type Method Description
    protected void acceptChannel​(ServerChannelContext context)
    This method is called when a server channel signals it is ready to accept a connection.
    protected void acceptException​(ServerChannelContext context, java.lang.Exception exception)
    This method is called when an attempt to accept a connection throws an exception.
    protected void activeException​(ChannelContext<?> context, java.lang.Exception exception)
    This method is called when setting a channel to active throws an exception.
    protected void closeException​(ChannelContext<?> context, java.lang.Exception exception)
    This method is called when an attempt to close a channel throws an exception.
    protected void connectException​(SocketChannelContext context, java.lang.Exception exception)
    This method is called when an attempt to connect a channel throws an exception.
    protected void genericChannelException​(ChannelContext<?> context, java.lang.Exception exception)
    This method is called when handling an event from a channel fails due to an unexpected exception.
    protected void handleActive​(ChannelContext<?> context)
    This method is called after a NioChannel is active with the selector.
    protected void handleClose​(ChannelContext<?> context)
    This method handles the closing of an NioChannel
    protected void handleConnect​(SocketChannelContext context)
    This method is called when a NioSocketChannel has just been accepted or if it has receive an OP_CONNECT event.
    protected void handleRead​(SocketChannelContext context)
    This method is called when a channel signals it is ready for be read.
    protected void handleRegistration​(ChannelContext<?> context)
    This method is called when a NioChannel is being registered with the selector.
    protected void handleTask​(java.lang.Runnable task)
    This method is called when a task or listener attached to a channel is available to run.
    protected void handleWrite​(SocketChannelContext context)
    This method is called when a channel signals it is ready to receive writes.
    protected void postHandling​(SocketChannelContext context)
    This method is called after events (READ, WRITE, CONNECT) have been handled for a channel.
    protected void readException​(SocketChannelContext context, java.lang.Exception exception)
    This method is called when an attempt to read from a channel throws an exception.
    protected void registrationException​(ChannelContext<?> context, java.lang.Exception exception)
    This method is called when an attempt to register a channel throws an exception.
    protected void selectorException​(java.io.IOException exception)
    This method handles an IOException that was thrown during a call to Selector.select(long) or Selector.close().
    protected void taskException​(java.lang.Exception exception)
    This method is called when a task or listener attached to a channel operation throws an exception.
    protected void uncaughtException​(java.lang.Exception exception)
    This method handles an exception that was uncaught during a select loop.
    protected void writeException​(SocketChannelContext context, java.lang.Exception exception)
    This method is called when an attempt to write to a channel throws an exception.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • exceptionHandler

      protected final java.util.function.Consumer<java.lang.Exception> exceptionHandler

  • Constructor Details

    • EventHandler

      public EventHandler​(java.util.function.Consumer<java.lang.Exception> exceptionHandler, java.util.function.Supplier<NioSelector> selectorSupplier)

  • Method Details

    • acceptChannel

      protected void acceptChannel​(ServerChannelContext context) throws java.io.IOException
      This method is called when a server channel signals it is ready to accept a connection. All of the accept logic should occur in this call.
      Parameters:
      context - that can accept a connection
      Throws:
      java.io.IOException

    • acceptException

      protected void acceptException​(ServerChannelContext context, java.lang.Exception exception)
      This method is called when an attempt to accept a connection throws an exception.
      Parameters:
      context - that accepting a connection
      exception - that occurred

    • handleRegistration

      protected void handleRegistration​(ChannelContext<?> context) throws java.io.IOException
      This method is called when a NioChannel is being registered with the selector. It should only be called once per channel.
      Parameters:
      context - that was registered
      Throws:
      java.io.IOException

    • registrationException

      protected void registrationException​(ChannelContext<?> context, java.lang.Exception exception)
      This method is called when an attempt to register a channel throws an exception.
      Parameters:
      context - that was registered
      exception - that occurred

    • handleActive

      protected void handleActive​(ChannelContext<?> context) throws java.io.IOException
      This method is called after a NioChannel is active with the selector. It should only be called once per channel.
      Parameters:
      context - that was marked active
      Throws:
      java.io.IOException

    • activeException

      protected void activeException​(ChannelContext<?> context, java.lang.Exception exception)
      This method is called when setting a channel to active throws an exception.
      Parameters:
      context - that was marked active
      exception - that occurred

    • handleConnect

      protected void handleConnect​(SocketChannelContext context) throws java.io.IOException
      This method is called when a NioSocketChannel has just been accepted or if it has receive an OP_CONNECT event.
      Parameters:
      context - that was registered
      Throws:
      java.io.IOException

    • connectException

      protected void connectException​(SocketChannelContext context, java.lang.Exception exception)
      This method is called when an attempt to connect a channel throws an exception.
      Parameters:
      context - that was connecting
      exception - that occurred

    • handleRead

      protected void handleRead​(SocketChannelContext context) throws java.io.IOException
      This method is called when a channel signals it is ready for be read. All of the read logic should occur in this call.
      Parameters:
      context - that can be read
      Throws:
      java.io.IOException

    • readException

      protected void readException​(SocketChannelContext context, java.lang.Exception exception)
      This method is called when an attempt to read from a channel throws an exception.
      Parameters:
      context - that was being read
      exception - that occurred

    • handleWrite

      protected void handleWrite​(SocketChannelContext context) throws java.io.IOException
      This method is called when a channel signals it is ready to receive writes. All of the write logic should occur in this call.
      Parameters:
      context - that can be written to
      Throws:
      java.io.IOException

    • writeException

      protected void writeException​(SocketChannelContext context, java.lang.Exception exception)
      This method is called when an attempt to write to a channel throws an exception.
      Parameters:
      context - that was being written to
      exception - that occurred

    • handleTask

      protected void handleTask​(java.lang.Runnable task)
      This method is called when a task or listener attached to a channel is available to run.
      Parameters:
      task - to handle

    • taskException

      protected void taskException​(java.lang.Exception exception)
      This method is called when a task or listener attached to a channel operation throws an exception.
      Parameters:
      exception - that occurred

    • postHandling

      protected void postHandling​(SocketChannelContext context)
      This method is called after events (READ, WRITE, CONNECT) have been handled for a channel.
      Parameters:
      context - that was handled

    • selectorException

      protected void selectorException​(java.io.IOException exception)
      This method handles an IOException that was thrown during a call to Selector.select(long) or Selector.close().
      Parameters:
      exception - the exception

    • uncaughtException

      protected void uncaughtException​(java.lang.Exception exception)
      This method handles an exception that was uncaught during a select loop.
      Parameters:
      exception - that was uncaught

    • handleClose

      protected void handleClose​(ChannelContext<?> context) throws java.io.IOException
      This method handles the closing of an NioChannel
      Parameters:
      context - that should be closed
      Throws:
      java.io.IOException

    • closeException

      protected void closeException​(ChannelContext<?> context, java.lang.Exception exception)
      This method is called when an attempt to close a channel throws an exception.
      Parameters:
      context - that was being closed
      exception - that occurred

    • genericChannelException

      protected void genericChannelException​(ChannelContext<?> context, java.lang.Exception exception)
      This method is called when handling an event from a channel fails due to an unexpected exception. An example would be if checking ready ops on a SelectionKey threw CancelledKeyException.
      Parameters:
      context - that caused the exception
      exception - that was thrown