Package org.jini.rio.boot

Class RioServiceDescriptor

java.lang.Object

org.jini.rio.boot.RioServiceDescriptor

All Implemented Interfaces:

ServiceDescriptor

public class RioServiceDescriptor
extends Object
implements ServiceDescriptor

The RioServiceDescriptor class is a utility that conforms to the Jini technology ServiceStarter framework, and will start a service using the CommonClassLoader as a shared, non-activatable, in-process service. Clients construct this object with the details of the service to be launched, then call create to launch the service in invoking object's VM.

This class provides separation of the import codebase (where the server classes are loaded from) from the export codebase (where clients should load classes from for stubs,etc.) as well as providing an independent security policy file for each service object. This functionality allows multiple service objects to be placed in the same VM, with each object maintaining a distinct codebase and policy.

Services need to implement the following "non-activatable constructor":

 <impl>(String[] args, LifeCycle lc)
 

where,

• args - are the service configuration arguments
• lc - is the hosting environment's LifeCycle reference.

Constructor Summary

Constructors

Constructor	Description
RioServiceDescriptor(String name, String codebase, String classpath, String implClassName, String[] serverConfigArgs)	Create a RioServiceDescriptor.
RioServiceDescriptor(String name, String codebase, String policy, String classpath, String implClassName, String[] serverConfigArgs, LifeCycle lifeCycle)	Create a RioServiceDescriptor, assigning given parameters to their associated, internal fields.

Method Summary

Modifier and Type	Method	Description
Object	create(Configuration config)	Creates an object described by the actual ServiceDescriptor instance.
String	getClasspath()	LifCycle accessor method.
String	getCodebase()	Codebase accessor method.
static AggregatePolicyProvider	getGlobalPolicy()
String	getImplClassName()	Implementation class accessor method.
LifeCycle	getLifeCycle()	LifeCycle accessor method.
String	getPolicy()	Policy accessor method.
String[]	getServerConfigArgs()	Service configuration arguments accessor method.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

RioServiceDescriptor

public RioServiceDescriptor(String name,
 String codebase,
 String policy,
 String classpath,
 String implClassName,
 String[] serverConfigArgs,
 LifeCycle lifeCycle)

Create a RioServiceDescriptor, assigning given parameters to their associated, internal fields.

Parameters:

codebase - location where clients can download required service-related classes (for example, stubs, proxies, etc.). Codebase components must be separated by spaces in which each component is in URL format.

policy - server policy filename or URL

classpath - location where server implementation classes can be found. Classpath components must be separated by path separators.

implClassName - name of server implementation class

serverConfigArgs - service configuration arguments

lifeCycle - LifeCycle reference for hosting environment

RioServiceDescriptor

public RioServiceDescriptor(String name,
 String codebase,
 String classpath,
 String implClassName,
 String[] serverConfigArgs)

Create a RioServiceDescriptor. Equivalent to calling the other overloaded constructor with null for the LifeCycle reference.

Method Details

getGlobalPolicy

public static AggregatePolicyProvider getGlobalPolicy()

getCodebase

public String getCodebase()

Codebase accessor method.

Returns:

The codebase string associated with this service descriptor.

getPolicy

public String getPolicy()

Policy accessor method.

Returns:

The policy string associated with this service descriptor.

getLifeCycle

public LifeCycle getLifeCycle()

LifeCycle accessor method.

Returns:

The LifeCycle object associated with this service descriptor.

getClasspath

public String getClasspath()

LifCycle accessor method.

Returns:

The classpath string associated with this service descriptor.

getImplClassName

public String getImplClassName()

Implementation class accessor method.

Returns:

The implementation class string associated with this service descriptor.

getServerConfigArgs

public String[] getServerConfigArgs()

Service configuration arguments accessor method.

Returns:

The service configuration arguments associated with this service descriptor.

create

public Object create(Configuration config)
              throws Exception

Description copied from interface: ServiceDescriptor

Creates an object described by the actual ServiceDescriptor instance.

Specified by:

create in interface ServiceDescriptor

Parameters:

config - The Configuration object used to configure the creation of the returned object.

Returns:

An object instance appropriate for the given service descriptor instance.

Throws:

Exception - Thrown if there was any problem creating the object.

See Also:

• ServiceDescriptor.create(net.jini.config.Configuration)

toString

public String toString()

Overrides:

toString in class Object