org.cometd.common

Class AbstractTransport

java.lang.Object

org.cometd.common.AbstractTransport

All Implemented Interfaces:

Transport

Direct Known Subclasses:

AbstractServerTransport, ClientTransport

public class AbstractTransport
extends Object
implements Transport

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractTransport(String name, Map<String,Object> options)

Method Summary

Modifier and Type	Method and Description
String	getName()
Object	getOption(String name) Returns an option value for the given option name, searching the option name tree.
boolean	getOption(String option, boolean dftValue) Get option or default value.
int	getOption(String option, int dftValue) Get option or default value.
long	getOption(String option, long dftValue) Get option or default value.
String	getOption(String option, String dftValue) Get option or default value.
Set<String>	getOptionNames()
String	getOptionPrefix() Specifies an option prefix made of string segments separated by the "."
void	setOption(String name, Object value) Sets the option value with the given name.
void	setOptionPrefix(String prefix) Set the option name prefix segment.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractTransport

protected AbstractTransport(String name,
                            Map<String,Object> options)

Method Detail

getName

public String getName()

Specified by:

getName in interface Transport

Returns:

The well known name of this transport, used in transport negotiations

See Also:

Bayeux.getAllowedTransports()

getOption

public Object getOption(String name)

Returns an option value for the given option name, searching the option name tree. The option map is searched for the option name with the most specific prefix. If this transport was initialized with a call to:

   setOptionPrefix("long-polling.jsonp");
 

then a call to getOption("foobar") will look for the most specific value with names:

   long-polling.json.foobar
   long-polling.foobar
   foobar
 

Specified by:

getOption in interface Transport

Parameters:

name - the option name to return the value for.

Returns:

the configuration option with the given qualifiedName

See Also:

Transport.getOptionNames()

setOption

public void setOption(String name,
                      Object value)

Sets the option value with the given name. The option name is inspected to see whether it starts with the option prefix; if it does not, the option prefix is prepended to the given name.

Parameters:

name - the option name to set the value for.

value - the value of the option.

getOptionPrefix

public String getOptionPrefix()

Description copied from interface: Transport

Specifies an option prefix made of string segments separated by the "." character, used to override more generic configuration entries.

Specified by:

getOptionPrefix in interface Transport

Returns:

the option prefix for this transport.

setOptionPrefix

public void setOptionPrefix(String prefix)

Set the option name prefix segment.

Normally this is called by the super class constructors to establish a naming hierarchy for options and iteracts with the setOption(String, Object) method to create a naming hierarchy for options. For example the following sequence of calls:

   setOption("foo","x");
   setOption("bar","y");
   setOptionPrefix("long-polling");
   setOption("foo","z");
   setOption("whiz","p");
   setOptionPrefix("long-polling.jsonp");
   setOption("bang","q");
   setOption("bar","r");
 

will establish the following option names and values:

   foo: x
   bar: y
   long-polling.foo: z
   long-polling.whiz: p
   long-polling.jsonp.bang: q
   long-polling.jsonp.bar: r
 

The various getOption(String) methods will search this name tree for the most specific match.

Parameters:

prefix - the prefix name

Throws:

IllegalArgumentException - if the new prefix is not prefixed by the old prefix.

getOptionNames

public Set<String> getOptionNames()

Specified by:

getOptionNames in interface Transport

Returns:

the set of configuration options

See Also:

Transport.getOption(String)

getOption

public String getOption(String option,
                        String dftValue)

Get option or default value.

Parameters:

option - The option name.

dftValue - The default value.

Returns:

option or default value

See Also:

getOption(String)

getOption

public long getOption(String option,
                      long dftValue)

Get option or default value.

Parameters:

option - The option name.

dftValue - The default value.

Returns:

option or default value

See Also:

getOption(String)

getOption

public int getOption(String option,
                     int dftValue)

Get option or default value.

Parameters:

option - The option name.

dftValue - The default value.

Returns:

option or default value

See Also:

getOption(String)

getOption

public boolean getOption(String option,
                         boolean dftValue)

Get option or default value.

Parameters:

option - The option name.

dftValue - The default value.

Returns:

option or default value

See Also:

getOption(String)