Class EchoHandler

java.lang.Object
org.eclipse.jetty.util.component.AbstractLifeCycle
org.eclipse.jetty.util.component.ContainerLifeCycle
org.eclipse.jetty.server.Handler.Abstract
org.eclipse.jetty.server.handler.EchoHandler
All Implemented Interfaces:
Handler, Request.Handler, Container, Destroyable, Dumpable, Dumpable.DumpableContainer, LifeCycle, Invocable
Direct Known Subclasses:
EchoHandler.Buffered, EchoHandler.BufferedAsync, EchoHandler.Reactive, EchoHandler.Stream
public class EchoHandler extends Handler.Abstract
A utility handler that echoes content from the request to the response.

  • Constructor Details

    • EchoHandler

      public EchoHandler()

  • Method Details

    • getInvocationType

      public Invocable.InvocationType getInvocationType()
      Specified by:
      getInvocationType in interface Invocable
      Specified by:
      getInvocationType in interface Request.Handler
      Overrides:
      getInvocationType in class Handler.Abstract
      Returns:
      The InvocationType of this object

    • handle

      public boolean handle(Request request, Response response, Callback callback)
      Description copied from interface: Request.Handler

      Invoked to handle the passed HTTP request and response.

      The request is accepted by returning true, then handling must be concluded by completing the passed callback. The handling may be asynchronous, i.e. this method may return true and complete the given callback later, possibly from a different thread. If this method returns false, then the callback must not be invoked and any mutation on the response reversed.

      Exceptions thrown by this method may be subsequently handled by an error Request.Handler, if present, otherwise a default HTTP 500 error is generated and the callback completed while writing the error response.

      The simplest implementation is:

       public boolean handle(Request request, Response response, Callback callback)
 {
     callback.succeeded();
     return true;
 }

      A HelloWorld implementation is:

       public boolean handle(Request request, Response response, Callback callback)
 {
     response.write(true, ByteBuffer.wrap("Hello World\n".getBytes(StandardCharsets.UTF_8)), callback);
     return true;
 }
      Parameters:
      request - the HTTP request to handle
      response - the HTTP response to handle
      callback - the callback to complete when the handling is complete
      Returns:
      True if and only if the request will be handled, a response generated and the callback eventually called. This may occur within the scope of the call to this method, or asynchronously some time later. If false is returned, then this method must not generate a response, nor complete the callback.
      See Also:

    • copy

      protected void copy(Request request, Response response, Callback callback)