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Copyright © 2009 Red Hat, Inc.
Abstract
Mobicents JAIN SLEE Diameter Sh-Client Resource Adaptor (RA) is the JAIN SLEE 1.1 RA for the client-side of IMS Sh Interface, the reference for interactions between the Home Subscriber Server (HSS) and the SIP Application Server (AS) and between the HSS and the OSA Service Capability Server (SCS), in the IMS. It is described in TS29.328 and TS29.329 by 3GPP.
This RA implements the Resource Adaptor Type defined by Mobicents development teams.
This manual uses several conventions to highlight certain words and phrases and draw attention to specific pieces of information.
In PDF and paper editions, this manual uses typefaces drawn from the Liberation Fonts set. The Liberation Fonts set is also used in HTML editions if the set is installed on your system. If not, alternative but equivalent typefaces are displayed. Note: Red Hat Enterprise Linux 5 and later includes the Liberation Fonts set by default.
Four typographic conventions are used to call attention to specific words and phrases. These conventions, and the circumstances they apply to, are as follows.
Mono-spaced Bold
Used to highlight system input, including shell commands, file names and paths. Also used to highlight key caps and key-combinations. For example:
To see the contents of the file
my_next_bestselling_novel
in your current working directory, enter thecat my_next_bestselling_novel
command at the shell prompt and press Enter to execute the command.
The above includes a file name, a shell command and a key cap, all presented in Mono-spaced Bold and all distinguishable thanks to context.
Key-combinations can be distinguished from key caps by the hyphen connecting each part of a key-combination. For example:
Press Enter to execute the command.
Press Ctrl+Alt+F1 to switch to the first virtual terminal. Press Ctrl+Alt+F7 to return to your X-Windows session.
The first sentence highlights the particular key cap to press. The second highlights two sets of three key caps, each set pressed simultaneously.
If source code is discussed, class names, methods, functions, variable names and returned values mentioned within a paragraph will be presented as above, in Mono-spaced Bold
. For example:
File-related classes include
filesystem
for file systems,file
for files, anddir
for directories. Each class has its own associated set of permissions.
Proportional Bold
This denotes words or phrases encountered on a system, including application names; dialogue box text; labelled buttons; check-box and radio button labels; menu titles and sub-menu titles. For example:
Choose Mouse Preferences. In the Buttons tab, click the Left-handed mouse check box and click to switch the primary mouse button from the left to the right (making the mouse suitable for use in the left hand).
from the main menu bar to launchTo insert a special character into a gedit file, choose from the main menu bar. Next, choose from the Character Map menu bar, type the name of the character in the Search field and click . The character you sought will be highlighted in the Character Table. Double-click this highlighted character to place it in the Text to copy field and then click the button. Now switch back to your document and choose from the gedit menu bar.
The above text includes application names; system-wide menu names and items; application-specific menu names; and buttons and text found within a GUI interface, all presented in Proportional Bold and all distinguishable by context.
Note the
shorthand used to indicate traversal through a menu and its sub-menus. This is to avoid the difficult-to-follow 'Select from the sub-menu in the menu of the main menu bar' approach.
or Mono-spaced Bold Italic
Proportional Bold Italic
Whether Mono-spaced Bold or Proportional Bold, the addition of Italics indicates replaceable or variable text. Italics denotes text you do not input literally or displayed text that changes depending on circumstance. For example:
To connect to a remote machine using ssh, type
ssh
at a shell prompt. If the remote machine isusername
@domain.name
example.com
and your username on that machine is john, typessh john@example.com
.The
mount -o remount
command remounts the named file system. For example, to remount thefile-system
/home
file system, the command ismount -o remount /home
.To see the version of a currently installed package, use the
rpm -q
command. It will return a result as follows:package
.
package-version-release
Note the words in bold italics above username, domain.name, file-system, package, version and release. Each word is a placeholder, either for text you enter when issuing a command or for text displayed by the system.
Aside from standard usage for presenting the title of a work, italics denotes the first use of a new and important term. For example:
When the Apache HTTP Server accepts requests, it dispatches child processes or threads to handle them. This group of child processes or threads is known as a server-pool. Under Apache HTTP Server 2.0, the responsibility for creating and maintaining these server-pools has been abstracted to a group of modules called Multi-Processing Modules (MPMs). Unlike other modules, only one module from the MPM group can be loaded by the Apache HTTP Server.
Two, commonly multi-line, data types are set off visually from the surrounding text.
Output sent to a terminal is set in Mono-spaced Roman
and presented thus:
books Desktop documentation drafts mss photos stuff svn books_tests Desktop1 downloads images notes scripts svgs
Source-code listings are also set in Mono-spaced Roman
but are presented and highlighted as follows:
package org.jboss.book.jca.ex1;
import javax.naming.InitialContext;
public class ExClient
{
public static void main(String args[])
throws Exception
{
InitialContext iniCtx = new InitialContext();
Object ref = iniCtx.lookup("EchoBean");
EchoHome home = (EchoHome) ref;
Echo echo = home.create();
System.out.println("Created Echo");
System.out.println("Echo.echo('Hello') = " + echo.echo("Hello"));
}
}
Finally, we use three visual styles to draw attention to information that might otherwise be overlooked.
A note is a tip or shortcut or alternative approach to the task at hand. Ignoring a note should have no negative consequences, but you might miss out on a trick that makes your life easier.
Important boxes detail things that are easily missed: configuration changes that only apply to the current session, or services that need restarting before an update will apply. Ignoring Important boxes won't cause data loss but may cause irritation and frustration.
A Warning should not be ignored. Ignoring warnings will most likely cause data loss.
If you find a typographical error in this manual, or if you have thought of a way to make this manual better, we would love to hear from you! Please submit a report in the the Issue Tracker, against the product Mobicents JAIN SLEE Diameter Sh-Client Resource Adaptor, or contact the authors.
When submitting a bug report, be sure to mention the manual's identifier: JAIN_SLEE_DIAMETER_SH_CLIENT_RA_User_Guide
If you have a suggestion for improving the documentation, try to be as specific as possible when describing it. If you have found an error, please include the section number and some of the surrounding text so we can find it easily.
This resource adaptor provides a Diameter API for JAIN SLEE applications, according to Sh inteface based on Diameter protocol.
Sh is a Diameter application that allows a Diameter server and a Diameter client to:
Events represent Diameter Sh messages received by the Diameter stack. Different events types are specified for each Diameter request or answer. Since this RA only operates on the client-side, events are fired on client activities.
The Activities are defined by RA Type to ease use of RA. Activities represent Diameter session between two peers. SLEE applications use activities to create, send and receive messages.
Diameter Sh-Client Resource Adaptor Type is defined by Mobicents team as part of effort to standardize RA Types.
Diameter Sh-Client Type 2.7.0.FINAL defines the following Activities:
This type of activity represents client side of Sh session. User-Data-Request (UDR), Profile-Update-Request (PUR) and Subscribe-Notifications-Request (SNR) can be created and sent in this Activity, receiving the respective Answer (or timeout) later on this Activity.
This activity type can be created with call to the createShClientActivity
method of net.java.slee.resource.diameter.sh.client.ShClientProvider
. It ends once underlying Sh client session ends.
This activity sessions are simple Request-Answer sessions, meaning that once the Answer is sent or received it is terminated.
This type of activity represents a subscription to User Data notifications for Sh session, based on User Identity. Push-Notification-Request (PNR) messages are received in this Activity and respective Answers are sent from it. Subscribe-Notifications-Request (SNR) can be created and sent in this Activity, receiving the respective Answer (or timeout) later on this Activity.
This activity type can be created with call to the createShClientSubscriptionActivity
method of net.java.slee.resource.diameter.sh.client.ShClientProvider
. It ends once SNR with UNSUBSCRIBE as Subs-Req-Type is sent (can be made using the Activity method sendUnsubscribeRequest
.)
All activities define methods required to properly function and expose necessary information to JAIN SLEE services. Sh Client Activity is defined as follows:
void sendUserDataRequest(UserDataRequest message) throws IOException;
void sendSubscribeNotificationsRequest(SubscribeNotificationsRequest message)
throws IOException;
void sendProfileUpdateRequest(ProfileUpdateRequest message) throws IOException;
This method sends a User-Data-Request message asynchronously.
This method sends a Subscribe-Notifications-Request message asynchronously.
This method sends a Profile-Update-Request message asynchronously.
Sh Client Subscription Activity is defined as follows:
ShClientMessageFactory getClientMessageFactory();
void sendSubscribeNotificationsRequest(SubscribeNotificationsRequest request)
throws IOException;
void sendUnsubscribeRequest() throws IOException;
PushNotificationAnswer createPushNotificationAnswer();
void sendPushNotificationAnswer(PushNotificationAnswer answer) throws IOException;
void sendPushNotificationAnswer(long resultCode,boolean isExperimentalResultCode)
throws IOException;
PushNotificationAnswer createPushNotificationAnswer(long resultCode,
boolean isExperimaental);
UserIdentityAvp getSubscribedUserIdentity();
This method returns a 'customized' message factory to manually create Sh Client Messages for this Activity.
This method sends a Subscribe-Notifications-Request message.
This method send a Subscribe-Notifications-Request message containing the AVPs required to UNSUBSCRIBE from the user that this activity represents a subscription to.
This method creates Push-Notification-Answer for received Push-Notification-Request. It returns null if a Push-Notification-Request has not been received.
This method sends a manually-constructed Push-Notification-Answer to the peer that sent the Push-Notification-Request.
This is a convenience method to create and send a Push-Notification-Answer containing a Result-Code or Experimental-Result AVP populated with the given value.
This method creates Push-Notification-Answer for received Push-Notification-Request, with the specified Result-Code. It returns null if a Push-Notification-Request has not been received.
This method returns the User-Identity for the subscription in the HSS represented by this activity.
It is safe to type cast all the mentioned Diameter Activities to it's super interface net.java.slee.resource.diameter.base.DiameterActivity
defined in Diameter Base Activities section.
Diameter Sh-Client Resource Adaptor Type declares all the Diameter Sh messages related to client operations.
The following tables shows which events are fired on each activity.
Table 2.1. Events received on Sh Client Activity
Name | Vendor | Version | Class |
---|---|---|---|
net.java.slee.resource. diameter.sh.events. UserDataAnswer | java.net | 0.8 | net.java.slee.resource. diameter.sh.events. UserDataAnswer |
net.java.slee.resource. diameter.sh.events. ProfileUpdateAnswer | java.net | 0.8 | net.java.slee.resource. diameter.sh.events. ProfileUpdateAnswer |
net.java.slee.resource. diameter.sh.events. SubscribeNotificationsAnswer | java.net | 0.8 | net.java.slee.resource. diameter.sh.events. SubscribeNotificationsAnswer |
Table 2.2. Events received on Sh Client Subscription Activity
Name | Vendor | Version | Class |
---|---|---|---|
net.java.slee.resource. diameter.sh.events. PushNotificationRequest | java.net | 0.8 | net.java.slee.resource. diameter.sh.events. PushNotificationRequest |
Spaces where introduced in Name
and Event Class
column values, to correctly render the table. Please remove them when using copy/paste.
The Mobicents Diameter Sh-Client Activity Context Interface Factory is defined as follows:
package net.java.slee.resource.diameter.sh.client;
import javax.slee.ActivityContextInterface;
import javax.slee.UnrecognizedActivityException;
public interface ShClientActivityContextInterfaceFactory {
ActivityContextInterface getActivityContextInterface(ShClientActivity activity)
throws UnrecognizedActivityException;
ActivityContextInterface getActivityContextInterface(ShClientSubscriptionActivity activity)
throws UnrecognizedActivityException;
}
The Mobicents Diameter Sh-Client Resource Adaptor SBB Interface provides SBBs with access to the Diameter objects required for creating and sending messages. It is defined as follows:
package net.java.slee.resource.diameter.sh.client;
import java.io.IOException;
import net.java.slee.resource.diameter.base.CreateActivityException;
import net.java.slee.resource.diameter.base.events.avp.DiameterIdentity;
import net.java.slee.resource.diameter.sh.DiameterShAvpFactory;
import net.java.slee.resource.diameter.sh.events.ProfileUpdateAnswer;
import net.java.slee.resource.diameter.sh.events.ProfileUpdateRequest;
import net.java.slee.resource.diameter.sh.events.SubscribeNotificationsAnswer;
import net.java.slee.resource.diameter.sh.events.SubscribeNotificationsRequest;
import net.java.slee.resource.diameter.sh.events.UserDataAnswer;
import net.java.slee.resource.diameter.sh.events.UserDataRequest;
public interface ShClientProvider {
public ShClientMessageFactory getClientMessageFactory();
public DiameterShAvpFactory getClientAvpFactory();
public ShClientActivity createShClientActivity() throws CreateActivityException;
public ShClientSubscriptionActivity createShClientSubscriptionActivity()
throws CreateActivityException;
public UserDataAnswer userDataRequest(UserDataRequest message) throws IOException;
public ProfileUpdateAnswer profileUpdateRequest(ProfileUpdateRequest message)
throws IOException;
public SubscribeNotificationsAnswer subscribeNotificationsRequest(
SubscribeNotificationsRequest message) throws IOException;
public DiameterIdentity[] getConnectedPeers();
public int getPeerCount();
}
This method returns a ShClientMessageFactory
implementation to be used to create DiameterMessage
objects.
This method returns a DiameterShAvpFactory
implementation to be used to create DiameterAvp
objects.
This method creates a new Sh Client activity to send and receive Diameter Sh messages.
This method creates a new Sh Client Subscription activity to send and receive Diameter Sh subscription related messages.
This method sends a synchronous UserDataRequest which will block until an answer is received from the peer.
This method sends a synchronous ProfileUpdateRequest which will block until an answer is received from the peer.
This method sends a synchronous SubscribeNotificationsRequest which will block until an answer is received from the peer.
This method returns the identities of peers this Diameter resource adaptor is connected to.
This method returns the number of peers this Diameter resource adaptor is connected to.
Simple Client-Side Example that creates and sends an User-Data-Request and receives an User-Data-Answer.
/* Method for creating and sending UDR with pre-defined values. */
private void doSimpleTestsSendUDR() {
try {
ShClientActivity basicClientActivity = this.provider.createShClientActivity();
ActivityContextInterface localACI = acif.getActivityContextInterface(basicClientActivity);
logger.info(" On TimerEvent: ACI created for basicClientActivity");
localACI.attach(getSbbContext().getSbbLocalObject());
DiameterIdentity[] peers = provider.getConnectedPeers();
UserDataRequest udr = ((ShClientMessageFactory)basicClientActivity.
getDiameterMessageFactory()).createUserDataRequest();
List<DiameterAvp> avps = new ArrayList<DiameterAvp>();
avps.add(avpFactory.getBaseFactory().createAvp(Avp.DESTINATION_HOST, ("aaa://" +
destinationIP + ":" + destinationPort).getBytes() ));
avps.add(avpFactory.getBaseFactory().createAvp(Avp.DESTINATION_REALM,
destinationRealm.getBytes()));
UserIdentityAvp ui=avpFactory.createUserIdentity();
ui.setPublicIdentity("sip:subscriber@mobicents.org");
avps.add(ui);
udr.setExtensionAvps(avps.toArray(new DiameterAvp[avps.size()]));
udr.setAuthSessionState(AuthSessionStateType.STATE_MAINTAINED);
udr.setDataReference(DataReferenceType.IMS_PUBLIC_IDENTITY);
basicClientActivity.sendUserDataRequest(udr);
}
catch (Exception e) {
tracer.error("Failure trying to create/send UDR.", e);
}
}
...
/* Method for handling ACA messages. Just print the Result-Code AVP. */
public void onUserDataRequestAnswer(UserDataAnswer uda, ActivityContextInterface aci)
if (tracer.isInfoEnabled()) {
tracer.info("User-Data-Answer received. Result-Code[" + uda.getResultCode() + "].");
}
}
This RA uses the Mobicents Diameter Stack, an improvement over jDiameter Stack. The stack is the result of the work done by Mobicents Diameter and jDiameter development teams, and source code is provided in all releases.
The Resource Adaptor supports configuration only at Resource Adaptor Entity creation time, the following table enumerates the configuration properties:
Table 3.1. Resource Adaptor's Configuration Properties
Property Name | Description | Property Type | Default Value |
---|---|---|---|
authApplicationIds | List of supported Authorization Application Ids in form of {vendor}:{application-id}, separated by comma ',' | java.lang.String | 10415:16777217 |
JAIN SLEE 1.1 Specification requires values set for properties without a default value, which means the configuration for those properties are mandatory, otherwise the Resource Adaptor Entity creation will fail!
There is a single Resource Adaptor Entity created when deploying the Resource Adaptor, named DiameterShClient
. The DiameterShClient
entity uses the default Resource Adaptor configuration, specified in Section 3.1, “Configuration”.
The DiameterShClient
entity is also bound to Resource Adaptor Link Name DiameterShClient
, to use it in an Sbb add the following XML to its descriptor:
<resource-adaptor-type-binding>
<resource-adaptor-type-ref>
<resource-adaptor-type-name>Diameter Sh-Client</resource-adaptor-type-name>
<resource-adaptor-type-vendor>java.net</resource-adaptor-type-vendor>
<resource-adaptor-type-version>0.8.1</resource-adaptor-type-version>
</resource-adaptor-type-ref>
<activity-context-interface-factory-name>
slee/resources/JDiameterShClientResourceAdaptor/java.net/0.8.1/acif
</activity-context-interface-factory-name>
<resource-adaptor-entity-binding>
<resource-adaptor-object-name>
slee/resources/diameter-sh-client-ra-interface
</resource-adaptor-object-name>
<resource-adaptor-entity-link>DiameterShClient</resource-adaptor-entity-link>
</resource-adaptor-entity-binding>
</resource-adaptor-type-binding>
Each Resource Adaptor Entity uses a single JAIN SLEE 1.1 Tracer, named DiameterShClientResourceAdaptor
. The related Log4j Logger category, which can be used to change the Tracer level from Log4j configuration, is javax.slee.RAEntityNotification[entity=DiameterShClient]
.
Ensure that the following requirements have been met before continuing with the install.
The Resource Adaptor hardware's main concern is RAM memory and Java Heap size, the more the better. For instance, while the underlying Mobicents JAIN SLEE may run with 1GB of RAM, 8GB is needed to achieve performance higher than 800 new requests per second.
Of course, memory is only needed to store the Resource Adaptor state, the faster the CPU more requests per second are supported, yet no particular CPU is a real requirement to use the RA.
Downloading the source code
Subversion is used to manage its source code. Instructions for using Subversion, including install, can be found at http://svnbook.red-bean.com
Use SVN to checkout a specific release source, the base URL is http://mobicents.googlecode.com/svn/tags/servers/jain-slee/2.x.y/resources/diameter-sh-client, then add the specific release version, lets consider 2.7.0.FINAL.
[usr]$ svn co http://mobicents.googlecode.com/svn/tags/servers/jain-slee/2.x.y/resources/diameter-sh-client/2.7.0.FINAL slee-ra-diameter-sh-client-2.7.0.FINAL
Building the source code
Maven 2.0.9 (or higher) is used to build the release. Instructions for using Maven2, including install, can be found at http://maven.apache.org
Use Maven to build the deployable unit binary.
[usr]$ cd slee-ra-diameter-sh-client-2.7.0.FINAL [usr]$ mvn install
Once the process finishes you should have the deployable-unit
jar file in the target
directory, if Mobicents JAIN SLEE is installed and environment variable JBOSS_HOME is pointing to its underlying JBoss Application Server directory, then the deployable unit jar will also be deployed in the container.
Similar process as for Section 4.2.1, “Release Source Code Building”, the only change is the SVN source code URL, which is http://mobicents.googlecode.com/svn/trunk/servers/jain-slee/resources/diameter-sh-client.
To install the Resource Adaptor simply execute provided ant script build.xml
default target:
[usr]$ ant
The script will copy the RA deployable unit jar to the default
Mobicents JAIN SLEE server profile deploy directory, to deploy to another server profile use the argument -Dnode=
.
To uninstall the Resource Adaptor simply execute provided ant script build.xml
undeploy
target:
[usr]$ ant undeploy
The script will delete the RA deployable unit jar from the default
Mobicents JAIN SLEE server profile deploy directory, to undeploy from another server profile use the argument -Dnode=
.
The Diameter stack used by the Mobicents JAIN SLEE Diameter Sh-Client Resource Adaptor supports application session failover, with specific session state being replicated, thus only available for Application sessions. Failover of application activities is transparent to SLEE applications. This means that SLEE applications must be in charge of properly adapting its state machine to recover generic session on node failure.
Currently, the only available balancing mechanism is provided by Diameter stack. It depends on RFC 3588 algorithm to select one peer from realm serving the desired application.
Revision History | |||
---|---|---|---|
Revision 1.0 | Tue Feb 09 2010 | ||
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