JNDI

When specifying search parameters, however, it is a JNDI requirement that you specify the uid value as if it were an attribute value.

As you could probably have guessed, the best solution is to use JNDI resolution.

I really only need one indicator, be it a JNDI name or an annotation, to let me know if it is local or remote.

Every connection factory or destination used in the sample application must be registered in a JNDI directory with a unique name.

The example utilizes a queue and a topic on the queue manager, using the JNDI bindings to switch back and forth between them.

Administered objects are not dependent on JNDI, but it is implicit that they can be bound to and looked up in a JNDI namespace.

This method could be altered to set up any JMS provider or to use JNDI to retrieve the Administered Objects.

JMS topics are defined with a name, a JNDI name, and a topic name, where the topic name is for the structure defined in the topic space.

The changes become effective only when the object is looked up in JNDI, which typically occurs once, when the program initializes.

With these optional configuration parameters, up to five JNDI parameters can be specified as name-value pairs.

By default, ADS does not support the Java schema, and will display the error Unable to bind object if you try to add the JNDI objects.

A simple example is that of an LDAP search request being mapped to a JNDI search operation.

The JNDI name must later be bound to JNDI names used by EJB and Web modules to look up the connection factory.

If the JNDI names are not right, then the client application will not be able to locate the JMS destinations.

If the JNDI names are not right, then the application will not be able to locate the connection factories.

For the activation specifications, you also need to specify a destination type and a destination JNDI name, as shown in Figure 13.

If you receive errors about JNDI names not being found, you've probably set one of these elements incorrectly.

The Service Locator pattern is still useful for encapsulating the code that uses JNDI, even if the locator does not use caching.

Using this naming context will not tie up a bean with the JNDI name of a resource that is known only at the time of deployment.

The next step is to call these EJBs using JNDI to access the database.

Note how the JNDI names tie up with the datasource names you created when you were planning the database.

Scroll down to the WebSphere Bindings section and enter the correct JNDI name for that resource (found in the WebLogic config. xml file).

You have now completed the JNDI resource configuration and are ready to deploy and test your applications.

In this case, you need a new client-side JNDI implementation capable of working with your new directory server.

Besides opening a communication channel, this link allows you to map your enterprise application's datasource JNDI names.

The listener port has to be configured with the JNDI names of connection factory and the WebSphere MQ JMS destination as shown in Figure 3.

In a lot of situations, you might need to browse the JNDI name tree, either to understand applications or debug application problems.

The code in this class first does a JNDI lookup to see if it can get an instance of the service.

The nodes can reuse any existing JNDI repositories and administered objects that are already set up for the existing JMS network.

Use the first form to access a datasource associated with a JNDI name, by providing that name as the value of the dataSource attribute.

JNDI is a Java standard that allows you to abstract the actual name of the JMS queue, topic, or even host name.

Client code should call JNDI, and JNDI forwards to the applicable service underneath through a provider implementation.

The portlet can retrieve such a service through a standard JDNI lookup.

How the Home is retrieved from the JNDI context (the name used to find it and whether a narrow or cast is needed)?

This contains properties like the driver name, jndi name, username, password, datatype, and the url.

Typically, the only parts that needs changing are the JNDI references for the JTA and non-JTA datasources.

Emitter instances are generated by an emitter factory, which in turn is obtained from JNDI.

While JNDI can be used to bind any kind of object to a name, J2EE primarily uses JNDI to provide access to resources.

Click on the Details tab to see the editable drop down box for the plug-in configuration JNDI name.

Also, the JNDI context provides a related aspect of loose coupling that should not be overlooked: implementation independence.

For node-level deployment with a module having a JNDI reference to the activation specification, create it from the Admin Console.

All OSGi services are automatically registered in JNDI and can be accessed in a manner familiar to Java EE components.

Ensure that the JNDI name for the session bean will be the same name you will later use when doing up a lookup of the home interface.

There are a few ways you can map the local-jndi-name element to WebSphere Application Server that are either unsupported or impractical.

The set of interfaces in JNDI provides an abstraction of a directory service.

Because JNDI lookups are expensive operations, the reference to the BC is looked up once, then stored for the rest of the session.

You do not need to manually assign JNDI binding names for each of the interfaces or EJB homes on your enterprise beans in EJB 3. 0 modules.

As you can see, name space binding is a flexible way to specify the JNDI name, independent of the deployment topology.

Define this new connection factory by specifying the name of the factory and the JNDI name for the factory, as Figure 8 shows.

This name is the local JNDI name being looked up in your bean code.

A typical configuration is a container environment for a JTA transaction with three JNDI-registered data sources.

The JNDI name for the filter factory must correspond to the JNDI name of a Filter Factory Profile resource.

We will briefly review how JNDI works here, primarily to understand the parts that affect the Service Locator pattern.

As typical with all application servers, the JNDI context factories for Community Edition and WebSphere Application Server are different.

If switching vendors is a possibility in your environment, you may consider using JNDI to help abstract the details.

In Figure 2, you can see that the client application container provides a reference resolution and mapping layer with JNDI.

As I noted previously (and shown in Figure 1), a J2EE container can use the directory services of ApacheDS through its JNDI wrapper.

In a similar vein to this one, my next tip will focus on decreasing the performance overhead of using JNDI with EJB components.

This allows for late binding of the JNDI names in an EJB application without having to recompile the Java code.

It can be difficult to figure out the JNDI tree of a target server if you are unfamiliar with what was deployed there.

You can either select a default entry from the drop down list, or enter the JNDI name of your self-defined staff plug-in configuration.

The DumpNameSpace tool provides a simple dump of the contents of the JNDI name tree visible to applications at a particular server.

Mapping the various types of references to the global JNDI names of the target objects is a common porting task.

Database servers, JNDI trees, LDAP Servers, and external file systems can be shared by the nodes in the cluster.

Assigning JNDI names to beans is the responsibility of the deployer, not the bean developer.

The first thing a session bean must do is to obtain a reference to a PersistenceManagerFactory by making a JNDI lookup call.

In Figure 1, you can see that ApacheDS implements a Java Naming and Directory Interface (JNDI) wrapper for its core directory service.

Is provided by the Java Naming and Directory Interface JNDI, with the ability to bind a logical name to an implementation at runtime.

When defining bindings, you specify JNDI names for the referenceable and referenced artifacts in an application.

Finally, the narrow method checks to make sure the retrieved object from JNDI can be cast into the intended object type, CustomerHome.

It is possible to configure more than one DistributedMap instance on one server, each with different JNDI names and cache characteristics.

This is a logical name that can be bound to a JNDI datasource object during the deployment phase.

At deployment time, I can match the reference name on the deployment descriptor to the real name of the resource defined in the JNDI.

Suppose you've developed a Java application that uses a client-side JNDI implementation for LDAP to talk to ApacheDS.

This setting specifies the JNDI factory class to look up the LDAP server.

Note also that Java 2 Standard Edition (J2SE) comes with a client-side JNDI implementation for LDAP, which you can use to talk to ApacheDS.

To access those SLSBs, the test program must specify the implementation specific location (port number) of the JNDI naming service.

Applications are bound to JNDI objects that represent the JMS provider.

The best way to cache is for an object to store any JNDI reference it uses in an instance variable.

JNDI is a Java API that allows the physical locations of resources to be abstracted into names.

Before I can run the application, I need to set up the WebSphere MQ queue manager and queues and bind them to JNDI.

EJB references let us use an extra level of indirection between the code and the actual JNDI name of the referenced bean.

You use JNDI to set the context for your JMS connection.

Stay tuned for Part 3, which will discuss JNDI connections to a mail session resource and integration with the example application.

By using JNDI ENC, the dependent object can explicitly request a reference to a certain collaborator.

Briefly, this means that we can hide specific JMS provider details behind a simple name that we use to look up a namespace in JNDI.

However, neither of these files contains any JNDI declarations, so they are not covered here.

The only setting you are required to specify in the MDB's bindings is the JNDI name for the specification (Figure 9).

Spring will look up the connection factory in JNDI using the environment property and initial context specified in the.

The JNDI name is the link to the task model that references the configuration and must be unique.

In this manner, the actual JNDI names can be specified differently for each version at deployment time.

The JMS JNDI objects are bound to the actual objects in the message engine.

Now an application deployed on the Server can access the database by referencing the JNDI name without regard to the actual DBMS being used.

To store JNDI objects, make a directory named JNDI-Directory on your C: drive.

The synchronous transmission profile JNDI name is the JNDI name of the event bus transmission profile resource.

As appropriate for a J2EE environment, the example now obtains the connection factory and destination from JNDI.

The subsequent screen (Figure 32 ) allows you to select the CEI Emitter Factory JNDI name.

To avoid these conflicts, defer binding the EJB home interface references to the JNDI name until deployment time.

You may also be wondering why the global-jndi-name element is commented out.

Name of the user allowed to perform the JNDI lookup.

The complete JNDI strings follow the naming convention, as shown in Listing 8.

Field, enter the same name used in the JNDI Name field of the URL created in the default URL provider in the previous section.

This file contains such properties as the driver name, jndi name, username, password, datatype, and the URL.

All naming services that implement the JNDI can be accessed under a single, standard API.

Is a well-known JNDI name for the default Event Factory provided by the event infrastructure.

File is no longer required since we are using a JNDI datasource.

In their context and obtain different types of objects that are bound in the global JNDI naming context.

If desired, change the values for the administrative name and JNDI name for the new MQ activation specification.

Note that the JNDI lookup uses the resource reference name in the application deployment descriptor.

You need to configure all the JNDI names used by your distributed applications in every node of the cluster.

This means it includes classes that implement JNDI interfaces to respond to requests for directory operations.

Make sure your JNDI names map to the ones defined in the Web deployment descriptor of the portlet project.

Describes conversion issues for applications that use the Java Naming and Directory Interface (JNDI).

Take care to avoid JNDI name clashes if multiple message listener port configurations are migrated.

Like EJB security settings and JNDI names, transaction mode can be modified using the AAT tool before deployment to AE.

It could equally use an @Resource annotation to inject the reference as an alternative to using the JNDI Context API.

If some applications need write access to JNDI, you'll have to grant them the needed permissions.

It shows how to declare the JNDI name that will be used to look up the session bean.

The event bus JNDI name specified in the transmission profile is the JNDI Name of the CEI server EJB interface.

Setting JNDI names and bindings for the connection configuration information and the EJB itself.

For Cloudscape datasources, enter values for Name, JNDI name, and database name, and accept default values for the remaining fields.

A CosNaming provider is available within the JDK, allowing the JNDI code to use the CORBA naming service for object lookup.

As stated earlier, the dumpnamespace utility makes finding out the fully qualified JNDI locations of objects much easier.

It includes an implementation of the JMS interface, but not the JNDI interface.

Storing it in the JNDI will give your applications access to other ApplicationContexts that were started in another context.

Only this time, the JNDI name is different, and the ProcessCustomerHome class is used to confirm the retrieved object from JNDI.

A common use of JNDI is database naming, where the application uses a JNDI name to get a database connection.

The name of the queue or topic is also resolved using JNDI.

Use the JNDI value shown below for this tutorial (although you can enter any CMP container factory JNDI name).

For the time being, leave the JNDI name of the CEI emitter factory to the default.

Both of the configured event group profiles described above use JMS queue and topic JNDI names.

To extend our metaphor: JNDI is a template for a town, while CosNaming and LDAP are specific towns.

JMS application - Provider-independent; accesses the provider via JMS using JNDI.

Unfortunately, JNDI operations almost always exact a performance toll.

To do this, you need to first look up an emitter factory from JNDI in the same way that the event factory was obtained.

Once the ApacheDS framework knows which JNDI operation needs to be invoked while processing a protocol request, it can generate an event.

The activation specification is bound into JNDI; an MDB's configuration specifies its activation specification using the JNDI name.

This article shows how to make a standalone Java application work with WebSphere MQ as a JMS and JNDI client.

You can find the actual JNDI name of those resources in the WebLogic config. xml file.

Applications look up a topic in JNDI and publish or consume messages.

The application server then binds a reference containing this information into JNDI.

The "Map EJB references to beans" panel maps all the EJB references to actual EJB JNDI names.

EJB home interfaces are persistent object references registered in the shared JNDI name space.

EJB JNDI references are very much like the JDBC resource references.

This is because resources have JNDI names that can be looked up by any application, and there is no authorization on resource access.

We already know that every JMS administered object must be registered in a directory accessible via JNDI.

A resource environment entry enables access to the resource by reference via JNDI lookup.

You also need to declare the resource reference in web. xml and look for the database pool via JNDI from the application code.

The container or application can get a handle on the resource manager through JNDI.

The staff support service uses the configuration JNDI name to locate the configuration.

Once the named datasource has been configured, write your application to use the JNDI name to access the new datasource.

Method is the JNDI queue name, which specifies where messages should be sent.

The same value as the JNDI Name field in the connection factory defined earlier.

Note that changing the JNDI bindings while the program is running will not dynamically switch the program between queues and topics.

You may have noticed that a property file is used to avoid hard coding the EJB JNDI name and location of the application server.

The following are examples of property file entries that will result in different JNDI connections.

The details are quite complex, but in brief, any application can look up any resource in the JNDI namespace.

Make a directory named JNDI-Directory on the C: drive for storing JNDI objects.

In this section, you see how to develop a portlet application that accesses a session bean using JNDI context.

However, all resources accessed using Context. lookup in the code must specify the true JNDI name.

The EJB component in this example uses a JNDI lookup to locate the database connection pool resource.

The JNDI 1. 2 Standard Extension API lets Java applications access objects in disparate directories and naming systems in a common way.

Pass the context factory type, nameserver name, and JNDI lookup string as parameters.

For each emitter factory profile configured in the application server, an EmitterFactory object is bound into JNDI on startup.

This may lead to namespace collisions, but more likely it just makes JNDI problem determination and resolution more difficult.

In contrast to the manual configuration, all JNDI references are removed.

Even though the sequence of doing the JNDI lookup is well known, casting and handling the JNDI exception adds a lot of standard code.

The jndiProperties variable is passed into the InitialContext constructor and the resulting Context is a "handle" to the JNDI service.

This is reasonably safe as there is nothing sensitive stored in JNDI (passwords are not stored there).

Returning to the wizard, enter oPort as output port JNDI name, BOOK as message format identifier, and REPLY_BOOK as reply id.

All the low-level JNDI logic is written in protected methods of LDAP4JavaObjects for just this reason.

That's it for declaring JNDI names and associating them to EJB components!

JNDI names associated with components or resources that belong to each application.

In the property editor that opens, for Name, enter CICS ECI, and for JNDI name, enter cicseci.

First, the complete JNDI name is retrieved from the customer. properties file.

This file maps EJB components to their default JNDI bindings and to the appropriate default datasource.

These properties are used while instantiating an object that exposes a JNDI interface named Context.

The Java libraries required are imported, first all of the JMS jars, and then the JNDI jar.

The first four items in the file are the JNDI environment properties.

My next step is to configure the WebSphere MQ queues and bind them to JNDI objects.

A lookup is performed using the JNDI name that you earlier bound into the EJB.

The context properties tell JNDI what context you want so that it can create the right one for you.

To manually add the JNDI name, click the newly added EJB reference on the References tab.

The service locator skips the JNDI lookup and uses the resource from the cache instead.

Note that JNDI permissions apply to the entire namespace, not just one part.

These administered objects could also have been obtained from a repository such as Java Naming and Directory Interface (JNDI).

JNDI provider URL in the form of corbaname: iiop: : .

The J2EE specification requires that all J2EE containers provide an implementation of the JNDI specification.

Subject containing CORBA credential is used by the authorization service to further restrict access to JNDI resources.

In a non-managed environment, the EIS connection information is used but the JNDI lookup name is not used.

While the client module might lookup local homes using JNDI, the container need not expose them in the JNDI namespace.

To support JMS applications, we need to configure JNDI with references to the JMS resources in the bus.

It is good practice to load the home object once and reuse it to avoid additional expensive JNDI lookups.

It accesses all resources the same way through the same JNDI tree.

Interface to support registration in the JNDI namespace.

The same value as the JNDI Name field in the queue defined earlier.

JNDI is not an LDAP-specific interface; you can have a JNDI implementation for any type of directory service.

This greatly simplifies things by avoiding JNDI lookup code.

The activation specification is bound into JNDI with this name, which is in turn what the MDBs use to access the activation specification.

In the example application, the JNDI access makes use of the file-based FSContext version available from the JNDI homepage (see Resources).

Wrapping before JNDI binding is the best practice because this is done once as opposed to wrapping after every lookup.

The base class for making a JNDI connection is javax. naming. InitialContext.

J2EE has conventions for what the JNDI resource environment reference subcontext names should be for common types of resources.

We are coding to the EJB reference name as opposed to the JNDI name of the target bean.

Note the commented out code for JOnAS which uses the global JNDI name for lookup.

The JNDI name is hard-coded in the Java code. This makes the Java code much less portable.

An end-point specific connection, such as a JNDI connection factory within a JNDI repository.

The next section details how to declare these objects in JNDI.

For more information about using JNDI to get the connection, see the ActiveMQ documentation.

Figure 3 below demonstrates where you need to specify the JNDI name that you will use later from your test case servlet.

Instead, it is added to the ibm-web-bnd. xmi file as an ejbRefBindings element.

Each subcontext name is used as part of a JNDI expression for accessing objects in the client's local context.

Message-driven beans only need to specify the JNDI name of the activation specification (Figure 4).

It appears that you have to know minute details of JNDI to just use an EJB in your application.

However, applications that write to JNDI will fail.

This value identifies the datasource in the JNDI name space.

In this tip, we ll look at some of the most common JNDI optimizations.

Enter the datasource name for the JNDI name value.

In this tip, Brett shows you how a home-interface factory can reduce the overhead of JNDI lookups in your EJB applications.

You need to manually configure the JNDI resource, usually via server. xml.

Also, you saw how to use JNDI directory services to share variables or objects among different pieces of code.

The Java Naming and Directory Interface (JNDI) is the most common way to interface with naming services.

In this sample, you will instead follow the JPA specification and map the datasources directly to global JNDI.

When an emitter factory is obtained from JNDI, it arrives preconfigured.

JMSAdmin. config - Tells the JMSAdmin tool to use a filesystem for the JNDI registry service.

And that's it. That's all the code you need to change, the code for instantiating an initial JNDI context.

By using the resource reference you will make sure that real JNDI name of your resource is not hard coded anywhere in your code.

If you didn't specify the JNDI lookup name, this name is automatically constructed.

Tab to bind the resource to a JNDI name.

You will later bind this J2C connection factory's JNDI name to the generated deploy code's session bean.

Type this name if you haven't yet specified the JNDI lookup name.

You can change it later in the Crystal Report jdbc(jndi) Connection Wizard ( Figure 12).

In addition, because there is no reference mapping layer, you must specify the raw JNDI name of the remote EJB.

You can see the protocol providers, MINA interfaces and classes, and operation handlers working with JNDI in Figure 2.

It is not possible to obtain a local reference using the global JNDI name.

Any string; by convention, we use the same name as its JNDI leaf.

To address this, you should restrict access to the JNDI namespace by specifying something more restrictive administratively using the.

If you are using a previous version of WSRR, then update the interface JNDI name accordingly.

The complete JNDI strings follow the naming convention seen in Listing 6.

Set the JNDI names as part of installing a J2EE application on the server.

You'll recall the first two steps from Listing 1, namely loading JNDI properties and instantiating a DirContext object.

JNDI is a lot like using Domain Name System (DNS) to enable the use of host names instead of IP addresses to identify hosts.

Note the JNDI names for the request queue.

With no parameters and get the JNDI context you need.

After you add the reference, you must manually add the JNDI name for the binding.

JNDI lookups are the standard way to obtain references to remote objects.

Specify the port number you found in step 4 inside the properties file so that the test program can find the JNDI naming service (Figure 7).

By convention, the JNDI names for all EJBs should start with the ejb segment.

This JNDI name is used during application deployment resource reference mapping.

So, I don't think the Access Intent errors are related to the JNDI problem.