Module org.eclipse.jetty.server

Package org.eclipse.jetty.server

Class Handler.Sequence

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.AbstractContainer

org.eclipse.jetty.server.Handler.Sequence

All Implemented Interfaces:

Handler, Handler.Collection, Handler.Container, Request.Handler, org.eclipse.jetty.util.component.Container, org.eclipse.jetty.util.component.Destroyable, org.eclipse.jetty.util.component.Dumpable, org.eclipse.jetty.util.component.Dumpable.DumpableContainer, org.eclipse.jetty.util.component.LifeCycle, org.eclipse.jetty.util.thread.Invocable

Direct Known Subclasses:

ContextHandlerCollection

Enclosing interface:

Handler

@ManagedObject
public static class Handler.Sequence
extends Handler.AbstractContainer
implements Handler.Collection

A Handler.Container that contains an ordered list of children Handlers whose Request.Handler.handle(Request, Response, Callback) method is invoked in sequence on each child until a child returns true.

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.jetty.server.Handler.Abstract

Handler.Abstract.NonBlocking

Nested classes/interfaces inherited from class org.eclipse.jetty.util.component.AbstractLifeCycle

org.eclipse.jetty.util.component.AbstractLifeCycle.AbstractLifeCycleListener, org.eclipse.jetty.util.component.AbstractLifeCycle.StopException

Nested classes/interfaces inherited from interface org.eclipse.jetty.util.component.Container

org.eclipse.jetty.util.component.Container.InheritedListener, org.eclipse.jetty.util.component.Container.Listener

Nested classes/interfaces inherited from interface org.eclipse.jetty.util.component.Dumpable

org.eclipse.jetty.util.component.Dumpable.DumpableContainer

Nested classes/interfaces inherited from interface org.eclipse.jetty.server.Handler

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

Nested classes/interfaces inherited from interface org.eclipse.jetty.util.thread.Invocable

org.eclipse.jetty.util.thread.Invocable.Callable, org.eclipse.jetty.util.thread.Invocable.InvocationType, org.eclipse.jetty.util.thread.Invocable.ReadyTask, org.eclipse.jetty.util.thread.Invocable.Task

Nested classes/interfaces inherited from interface org.eclipse.jetty.util.component.LifeCycle

org.eclipse.jetty.util.component.LifeCycle.Listener

Nested classes/interfaces inherited from interface org.eclipse.jetty.server.Request.Handler

Request.Handler.AbortException

Field Summary

Fields inherited from class org.eclipse.jetty.util.component.AbstractLifeCycle

FAILED, STARTED, STARTING, STOPPED, STOPPING

Fields inherited from interface org.eclipse.jetty.util.component.Dumpable

KEY

Fields inherited from interface org.eclipse.jetty.util.thread.Invocable

__nonBlocking, NOOP

Constructor Summary

Constructors

Constructor	Description
Sequence(boolean dynamic, List<Handler> handlers)	Creates a Sequence with the given dynamic parameter and the given Handlers.
Sequence(List<Handler> handlers)	Creates a Sequence with the given Handlers.
Sequence(Handler... handlers)	Creates a Sequence with the given Handlers.

Method Summary

Modifier and Type	Method	Description
List<Handler>	getHandlers()
org.eclipse.jetty.util.thread.Invocable.InvocationType	getInvocationType()
boolean	handle(Request request, Response response, org.eclipse.jetty.util.Callback callback)	Invoked to handle the passed HTTP request and response.
protected List<Handler>	newHandlers(List<Handler> handlers)
void	setHandlers(List<Handler> handlers)	Sets the given Handlers as children of this collection of Handlers.

Methods inherited from class org.eclipse.jetty.server.Handler.AbstractContainer

findContainerOf, getDescendant, getDescendants, isDynamic, setDynamic, setServer

Methods inherited from class org.eclipse.jetty.server.Handler.Abstract

destroy, doStart, doStop, getServer

Methods inherited from class org.eclipse.jetty.util.component.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 org.eclipse.jetty.util.component.AbstractLifeCycle

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.jetty.util.component.Container

getCachedBeans, getEventListeners

Methods inherited from interface org.eclipse.jetty.util.component.Destroyable

destroy

Methods inherited from interface org.eclipse.jetty.util.component.Dumpable

dumpSelf

Methods inherited from interface org.eclipse.jetty.util.component.Dumpable.DumpableContainer

isDumpable

Methods inherited from interface org.eclipse.jetty.server.Handler

getServer, setServer

Methods inherited from interface org.eclipse.jetty.server.Handler.Collection

addHandler, addHandler, removeHandler, setHandlers

Methods inherited from interface org.eclipse.jetty.server.Handler.Container

getContainer, getDescendant, getDescendants, getDescendants

Methods inherited from interface org.eclipse.jetty.util.component.LifeCycle

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

Constructor Details

Sequence

public Sequence(Handler... handlers)

Creates a Sequence with the given Handlers.

The created sequence is dynamic only if the Handler array is null or empty.

Parameters:

handlers - the Handlers of this Sequence

Sequence

public Sequence(List<Handler> handlers)

Creates a Sequence with the given Handlers.

The created sequence is dynamic only if the Handler list is null or empty.

Parameters:

handlers - the Handlers of this Sequence

Sequence

public Sequence(boolean dynamic,
 List<Handler> handlers)

Creates a Sequence with the given dynamic parameter and the given Handlers.

Parameters:

dynamic - whether this Sequence is dynamic

handlers - the Handlers of this Sequence

Method Details

handle

public boolean handle(Request request,
 Response response,
 org.eclipse.jetty.util.Callback callback)
               throws Exception

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;
 }
 

Specified by:

handle in interface Request.Handler

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.

Throws:

Exception - if there is a failure during the handling. Catchers cannot assume that the callback will be called and thus should attempt to complete the request as if a false had been returned.

See Also:

• Request.Handler.AbortException

getHandlers

public List<Handler> getHandlers()

Specified by:

getHandlers in interface Handler.Container

Returns:

an immutable collection of Handlers directly contained by this Handler.

setHandlers

public void setHandlers(List<Handler> handlers)

Description copied from interface: Handler.Collection

Sets the given Handlers as children of this collection of Handlers.

The list is copied and any subsequent modification to the list does not have any effect on this Handler.

Any existing children Handler is removed.

Specified by:

setHandlers in interface Handler.Collection

Parameters:

handlers - the Handler to set as children

getInvocationType

public org.eclipse.jetty.util.thread.Invocable.InvocationType getInvocationType()

Specified by:

getInvocationType in interface org.eclipse.jetty.util.thread.Invocable

Specified by:

getInvocationType in interface Request.Handler

Overrides:

getInvocationType in class Handler.AbstractContainer

newHandlers

protected List<Handler> newHandlers(List<Handler> handlers)