org.jboss.netty.bootstrap

Class Bootstrap

java.lang.Object

org.jboss.netty.bootstrap.Bootstrap

All Implemented Interfaces:

ExternalResourceReleasable

Direct Known Subclasses:

ClientBootstrap, ConnectionlessBootstrap, ServerBootstrap

public class Bootstrap
extends Object
implements ExternalResourceReleasable

A helper class which initializes a Channel. This class provides the common data structure for its subclasses which actually initialize Channels and their child Channels using the common data structure. Please refer to ClientBootstrap, ServerBootstrap, and ConnectionlessBootstrap for client side, server-side, and connectionless (e.g. UDP) channel initialization respectively.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Bootstrap() Creates a new instance with no ChannelFactory set.
protected	Bootstrap(ChannelFactory channelFactory) Creates a new instance with the specified initial ChannelFactory.

Method Summary

Methods

Modifier and Type	Method and Description
ChannelFactory	getFactory() Returns the ChannelFactory that will be used to perform an I/O operation.
Object	getOption(String key) Returns the value of the option with the specified key.
Map<String,Object>	getOptions() Returns the options which configures a new Channel and its child Channels.
ChannelPipeline	getPipeline() Returns the default ChannelPipeline which is cloned when a new Channel is created.
Map<String,ChannelHandler>	getPipelineAsMap() Dependency injection friendly convenience method for getPipeline() which returns the default pipeline of this bootstrap as an ordered map.
ChannelPipelineFactory	getPipelineFactory() Returns the ChannelPipelineFactory which creates a new ChannelPipeline for each new Channel.
void	releaseExternalResources() This method simply delegates the call to ChannelFactory.releaseExternalResources().
void	setFactory(ChannelFactory factory) Sets the ChannelFactory that will be used to perform an I/O operation.
void	setOption(String key, Object value) Sets an option with the specified key and value.
void	setOptions(Map<String,Object> options) Sets the options which configures a new Channel and its child Channels.
void	setPipeline(ChannelPipeline pipeline) Sets the default ChannelPipeline which is cloned when a new Channel is created.
void	setPipelineAsMap(Map<String,ChannelHandler> pipelineMap) Dependency injection friendly convenience method for setPipeline(ChannelPipeline) which sets the default pipeline of this bootstrap from an ordered map.
void	setPipelineFactory(ChannelPipelineFactory pipelineFactory) Sets the ChannelPipelineFactory which creates a new ChannelPipeline for each new Channel.

Methods inherited from class java.lang.Object

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

Constructor Detail

Bootstrap

protected Bootstrap()

Creates a new instance with no ChannelFactory set. setFactory(ChannelFactory) must be called at once before any I/O operation is requested.

Bootstrap

protected Bootstrap(ChannelFactory channelFactory)

Creates a new instance with the specified initial ChannelFactory.

Method Detail

getFactory

public ChannelFactory getFactory()

Returns the ChannelFactory that will be used to perform an I/O operation.

Throws:

IllegalStateException - if the factory is not set for this bootstrap yet. The factory can be set in the constructor or setFactory(ChannelFactory).

setFactory

public void setFactory(ChannelFactory factory)

Sets the ChannelFactory that will be used to perform an I/O operation. This method can be called only once and can't be called at all if the factory was specified in the constructor.

Throws:

IllegalStateException - if the factory is already set

getPipeline

public ChannelPipeline getPipeline()

Returns the default ChannelPipeline which is cloned when a new Channel is created. Bootstrap creates a new pipeline which has the same entries with the returned pipeline for a new Channel.

Please note that this method is a convenience method that works only when 1) you create only one channel from this bootstrap (e.g. one-time client-side or connectionless channel) or 2) all handlers in the pipeline is stateless. You have to use setPipelineFactory(ChannelPipelineFactory) if 1) your pipeline contains a stateful ChannelHandler and 2) one or more channels are going to be created by this bootstrap (e.g. server-side channels).

Returns:

the default ChannelPipeline

Throws:

IllegalStateException - if setPipelineFactory(ChannelPipelineFactory) was called by a user last time.

setPipeline

public void setPipeline(ChannelPipeline pipeline)

Sets the default ChannelPipeline which is cloned when a new Channel is created. Bootstrap creates a new pipeline which has the same entries with the specified pipeline for a new channel.

Calling this method also sets the pipelineFactory property to an internal ChannelPipelineFactory implementation which returns a shallow copy of the specified pipeline.

Please note that this method is a convenience method that works only when 1) you create only one channel from this bootstrap (e.g. one-time client-side or connectionless channel) or 2) all handlers in the pipeline is stateless. You have to use setPipelineFactory(ChannelPipelineFactory) if 1) your pipeline contains a stateful ChannelHandler and 2) one or more channels are going to be created by this bootstrap (e.g. server-side channels).

getPipelineAsMap

public Map<String,ChannelHandler> getPipelineAsMap()

Dependency injection friendly convenience method for getPipeline() which returns the default pipeline of this bootstrap as an ordered map.

Please note that this method is a convenience method that works only when 1) you create only one channel from this bootstrap (e.g. one-time client-side or connectionless channel) or 2) all handlers in the pipeline is stateless. You have to use setPipelineFactory(ChannelPipelineFactory) if 1) your pipeline contains a stateful ChannelHandler and 2) one or more channels are going to be created by this bootstrap (e.g. server-side channels).

Throws:

IllegalStateException - if setPipelineFactory(ChannelPipelineFactory) was called by a user last time.

setPipelineAsMap

public void setPipelineAsMap(Map<String,ChannelHandler> pipelineMap)

Dependency injection friendly convenience method for setPipeline(ChannelPipeline) which sets the default pipeline of this bootstrap from an ordered map.

Please note that this method is a convenience method that works only when 1) you create only one channel from this bootstrap (e.g. one-time client-side or connectionless channel) or 2) all handlers in the pipeline is stateless. You have to use setPipelineFactory(ChannelPipelineFactory) if 1) your pipeline contains a stateful ChannelHandler and 2) one or more channels are going to be created by this bootstrap (e.g. server-side channels).

Throws:

IllegalArgumentException - if the specified map is not an ordered map

getPipelineFactory

public ChannelPipelineFactory getPipelineFactory()

Returns the ChannelPipelineFactory which creates a new ChannelPipeline for each new Channel.

See Also:

getPipeline()

setPipelineFactory

public void setPipelineFactory(ChannelPipelineFactory pipelineFactory)

Sets the ChannelPipelineFactory which creates a new ChannelPipeline for each new Channel. Calling this method invalidates the current pipeline property of this bootstrap. Subsequent getPipeline() and getPipelineAsMap() calls will raise IllegalStateException.

See Also:

setPipeline(ChannelPipeline), setPipelineAsMap(Map)

getOptions

public Map<String,Object> getOptions()

Returns the options which configures a new Channel and its child Channels. The names of the child Channel options are prepended with "child." (e.g. "child.keepAlive").

setOptions

public void setOptions(Map<String,Object> options)

Sets the options which configures a new Channel and its child Channels. To set the options of a child Channel, prepend "child." to the option name (e.g. "child.keepAlive").

getOption

public Object getOption(String key)

Returns the value of the option with the specified key. To retrieve the option value of a child Channel, prepend "child." to the option name (e.g. "child.keepAlive").

Parameters:

key - the option name

Returns:

the option value if the option is found. null otherwise.

setOption

public void setOption(String key,
             Object value)

Sets an option with the specified key and value. If there's already an option with the same key, it is replaced with the new value. If the specified value is null, an existing option with the specified key is removed. To set the option value of a child Channel, prepend "child." to the option name (e.g. "child.keepAlive").

Parameters:

key - the option name

value - the option value

releaseExternalResources

public void releaseExternalResources()

This method simply delegates the call to ChannelFactory.releaseExternalResources().

Specified by:

releaseExternalResources in interface ExternalResourceReleasable