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.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	EchoHandler.Buffered
static class	EchoHandler.BufferedAsync
static class	EchoHandler.Reactive
static class	EchoHandler.Stream

Nested classes/interfaces inherited from class Handler.Abstract

Handler.Abstract.NonBlocking

Nested classes/interfaces inherited from class AbstractLifeCycle

AbstractLifeCycle.AbstractLifeCycleListener, AbstractLifeCycle.StopException

Nested classes/interfaces inherited from interface Container

Container.InheritedListener, Container.Listener

Nested classes/interfaces inherited from interface Dumpable

Dumpable.DumpableContainer, Dumpable.DumpAppendable

Nested classes/interfaces inherited from interface Handler

Handler.Abstract, Handler.AbstractContainer, Handler.Collection, Handler.Container, Handler.Sequence, Handler.Singleton, Handler.Wrapper

Nested classes/interfaces inherited from interface Invocable

Invocable.Callable, Invocable.InvocationType, Invocable.ReadyTask, Invocable.Task

Nested classes/interfaces inherited from interface LifeCycle

LifeCycle.Listener

Nested classes/interfaces inherited from interface Request.Handler

Request.Handler.AbortException

Field Summary

Fields inherited from class AbstractLifeCycle

FAILED, STARTED, STARTING, STOPPED, STOPPING

Fields inherited from interface Dumpable

LEGEND

Fields inherited from interface Invocable

__nonBlocking, NOOP

Constructor Summary

Constructors

Constructor	Description
EchoHandler()

Method Summary

Modifier and Type	Method	Description
protected void	copy(Request request, Response response, Callback callback)
Invocable.InvocationType	getInvocationType()
boolean	handle(Request request, Response response, Callback callback)	Invoked to handle the passed HTTP request and response.

Methods inherited from class Handler.Abstract

destroy, doStart, doStop, getServer, setServer

Methods inherited from class ContainerLifeCycle

addBean, addBean, addEventListener, addManaged, contains, dump, dump, dump, dumpObjects, dumpStdErr, getBean, getBeans, getBeans, getContainedBeans, getContainedBeans, installBean, installBean, isAuto, isManaged, isUnmanaged, manage, removeBean, removeBeans, removeEventListener, setBeans, start, stop, unmanage, updateBean, updateBean, updateBeans, updateBeans

Methods inherited from class AbstractLifeCycle

getEventListeners, getState, getState, isFailed, isRunning, isStarted, isStarting, isStopped, isStopping, setEventListeners, start, stop, toString

Methods inherited from class Object

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

Methods inherited from interface Container

getCachedBeans, getEventListeners

Methods inherited from interface Dumpable

dumpSelf

Methods inherited from interface Dumpable.DumpableContainer

isDumpable

Methods inherited from interface LifeCycle

addEventListener, isFailed, isRunning, isStarted, isStarting, isStopped, isStopping, removeEventListener, start, stop

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:

• Request.Handler.AbortException

copy

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