Package com.ning.http.client.providers.grizzly

Class FeedableBodyGenerator

java.lang.Object

com.ning.http.client.providers.grizzly.FeedableBodyGenerator

All Implemented Interfaces:

BodyGenerator

public class FeedableBodyGenerator
extends Object
implements BodyGenerator

A Grizzly-specific BodyGenerator that allows data to be fed to the connection in blocking or non-blocking fashion via the use of a FeedableBodyGenerator.Feeder. This class provides two FeedableBodyGenerator.Feeder implementations for rapid prototyping. First is the FeedableBodyGenerator.SimpleFeeder which is simply a listener that asynchronous data transferring has been initiated. The second is the FeedableBodyGenerator.NonBlockingFeeder which allows reading and feeding data in a non-blocking fashion.

Since:

1.7.0

Author:

The Grizzly Team

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	FeedableBodyGenerator.BaseFeeder	Base class for FeedableBodyGenerator.Feeder implementations.
static interface	FeedableBodyGenerator.Feeder	Specifies the functionality all Feeders must implement.
static class	FeedableBodyGenerator.NonBlockingFeeder	Implementations of this class provide the framework to read data from some source and feed data to the FeedableBodyGenerator without blocking.
static class	FeedableBodyGenerator.SimpleFeeder	This simple FeedableBodyGenerator.Feeder implementation allows the implementation to feed data in whatever fashion is deemed appropriate.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT	Defer to whatever the connection has been configured for max pending bytes.
static final int	UNBOUND	There is no limit on bytes waiting to be written.

Constructor Summary

Constructors

Constructor	Description
FeedableBodyGenerator()

Method Summary

Modifier and Type	Method	Description
Body	createBody()	Creates a new instance of the request body to be read.
void	setFeeder(FeedableBodyGenerator.Feeder feeder)	Add a FeedableBodyGenerator.Feeder implementation that will be invoked when writing without blocking is possible.
void	setMaxPendingBytes(int maxPendingBytes)	Configured the maximum number of bytes that may be pending to be written to the wire.

Methods inherited from class java.lang.Object

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

Field Details

UNBOUND

public static final int UNBOUND

There is no limit on bytes waiting to be written. This configuration value should be used with caution as it could lead to out-of-memory conditions.

See Also:

• Constant Field Values

DEFAULT

public static final int DEFAULT

Defer to whatever the connection has been configured for max pending bytes.

See Also:

• Constant Field Values

Constructor Details

FeedableBodyGenerator

public FeedableBodyGenerator()

Method Details

createBody

public Body createBody()
                throws IOException

Description copied from interface: BodyGenerator

Creates a new instance of the request body to be read. While each invocation of this method is supposed to create a fresh instance of the body, the actual contents of all these body instances is the same. For example, the body needs to be resend after an authentication challenge of a redirect.

Specified by:

createBody in interface BodyGenerator

Returns:

The request body, never null.

Throws:

IOException - If the body could not be created.

setMaxPendingBytes

public void setMaxPendingBytes(int maxPendingBytes)

Configured the maximum number of bytes that may be pending to be written to the wire. If not explicitly configured, the connection's current configuration will be used instead. Once all data has been fed, the connection's max pending bytes configuration will be restored to its original value.

Parameters:

maxPendingBytes - maximum number of bytes that may be queued to be written to the wire.

Throws:

IllegalStateException - if called after initializeAsynchronousTransfer(FilterChainContext, HttpRequestPacket) has been called by the GrizzlyAsyncHttpProvider.

IllegalArgumentException - if maxPendingBytes is less than zero and is not UNBOUND or DEFAULT.

setFeeder

public void setFeeder(FeedableBodyGenerator.Feeder feeder)

Add a FeedableBodyGenerator.Feeder implementation that will be invoked when writing without blocking is possible. This method must be set before dispatching the request this feeder is associated with.

Parameters:

feeder - the FeedableBodyGenerator.Feeder responsible for providing data.

Throws:

IllegalStateException - if called after initializeAsynchronousTransfer(FilterChainContext, HttpRequestPacket) has been called by the GrizzlyAsyncHttpProvider.

IllegalArgumentException - if feeder is null