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Oracle GlassFish Server 3.1 Application Development Guide
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Document Information

Preface

Part I Development Tasks and Tools

1.  Setting Up a Development Environment

2.  Class Loaders

3.  Debugging Applications

Part II Developing Applications and Application Components

4.  Securing Applications

5.  Developing Web Services

6.  Using the Java Persistence API

7.  Developing Web Applications

8.  Using Enterprise JavaBeans Technology

9.  Using Container-Managed Persistence

10.  Developing Java Clients

Introducing the Application Client Container

ACC Security

ACC Naming

Application Client Annotation

Java Web Start

Application Client JAR File

Developing Clients Using the ACC

To Access an EJB Component From an Application Client

To Access a JMS Resource From an Application Client

Using Java Web Start

Enabling and Disabling Java Web Start

Downloading and Launching an Application Client

The Application Client URL

Signing JAR Files Used in Java Web Start

Error Handling

Vendor Icon, Splash Screen, and Text

Creating a Custom JNLP File

Using the Embeddable ACC

Running an Application Client Using the appclient Script

Using the package-appclient Script

The client.policy File

Using RMI/IIOP Over SSL

Connecting to a Remote EJB Module Through a Firewall

Specifying a Splash Screen

Setting Login Retries

Using Libraries with Application Clients

Developing Clients Without the ACC

To access an EJB component from a stand-alone client

To access an EJB component from a server-side module

To access a JMS resource from a stand-alone client

11.  Developing Connectors

12.  Developing Lifecycle Listeners

13.  Developing OSGi-enabled Java EE Applications

Part III Using Services and APIs

14.  Using the JDBC API for Database Access

15.  Using the Transaction Service

16.  Using the Java Naming and Directory Interface

17.  Using the Java Message Service

18.  Using the JavaMail API

Index

Developing Clients Using the ACC

This section describes the procedure to develop, assemble, and deploy client applications using the ACC.

The following topics are addressed here:

To Access an EJB Component From an Application Client

  1. In your client code, reference the EJB component by using an @EJB annotation or by looking up the JNDI name as defined in the ejb-jar.xml file.

    For more information about naming and lookups, see Accessing the Naming Context.

    If load balancing is enabled as in Step 7 and the EJB components being accessed are in a different cluster, the endpoint list must be included in the lookup, as follows:

    corbaname:host1:port1,host2:port2,.../NameService#ejb/jndi-name
  2. Define the @EJB annotations or the ejb-ref elements in the application-client.xml file. Define the corresponding ejb-ref elements in the glassfish-application-client.xml file.

    For more information on the glassfish-application-client.xml file, see The glassfish-application-client.xml file in Oracle GlassFish Server 3.1 Application Deployment Guide. For a general explanation of how to map JNDI names using reference elements, see Mapping References.

  3. Deploy the application client and EJB component together in an application.

    For more information on deployment, see the Oracle GlassFish Server 3.1 Application Deployment Guide. To get the client JAR file, use the --retrieve option of the asadmin deploy command.

    To retrieve the stubs and ties generated during deployment, use the asadmin get-client-stubs command. For details, see the Oracle GlassFish Server 3.1-3.1.1 Reference Manual.

  4. Ensure that the client JAR file includes the following files:
    • A Java class to access the bean.

    • application-client.xml - (optional) Java EE application client deployment descriptor.

    • glassfish-application-client.xml - (optional) GlassFish Server specific client deployment descriptor. For information on the glassfish-application-client.xml file, see The glassfish-application-client.xml file in Oracle GlassFish Server 3.1 Application Deployment Guide.

    • The MANIFEST.MF file. This file contains a reference to the main class, which states the complete package prefix and class name of the Java client.

  5. Prepare the client machine.

    This step is not needed for Java Web Start. This step is not needed if the client and server machines are the same.

    If you are using the appclient script, package the GlassFish Server system files required to launch application clients on remote systems using the package-appclient script, then retrieve the application client itself using the asadmin get-client-stubs command.

    For more information, see Using the package-appclient Script and the Oracle GlassFish Server 3.1-3.1.1 Reference Manual.

  6. To access EJB components that are residing in a remote system, make the following changes to the sun-acc.xml file or the appclient script. This step is not needed for Java Web Start.

    To determine the ORB port on the remote server, use the asadmin get command. For example:

    asadmin --host rmtsrv get server-config.iiop-service.iiop-listener.iiop-listener1.port

    For more information about the asadmin get command, see the Oracle GlassFish Server 3.1-3.1.1 Reference Manual.

  7. To set up load balancing and failover of remote EJB references, define at least two target-server elements in the sun-acc.xml file or the appclient script. This step is not needed for Java Web Start.

    If the GlassFish Server instance on which the application client is deployed participates in a cluster, the ACC finds all currently active IIOP endpoints in the cluster automatically. However, a client should have at least two endpoints specified for bootstrapping purposes, in case one of the endpoints has failed.

    The target-server elements in the sun-acc.xml file specify one or more IIOP endpoints used for load balancing. The address attribute is an IPv4 address or host name, and the port attribute specifies the port number. See client-container in Oracle GlassFish Server 3.1 Application Deployment Guide.

    The --targetserver option of the appclient script specifies one or more IIOP endpoints used for load balancing. For more information, see Running an Application Client Using the appclient Script.

Next Steps

To Access a JMS Resource From an Application Client

  1. Create a JMS client.

    For detailed instructions on developing a JMS client, see “Chapter 33: The Java Message Service API” in the The Java EE 6 Tutorial.

  2. Next, configure a JMS resource on the GlassFish Server.

    For information on configuring JMS resources, see Administering JMS Connection Factories and Destinations in Oracle GlassFish Server 3.1 Administration Guide.

  3. Define the @Resource or @Resources annotations or the resource-ref elements in the application-client.xml file. Define the corresponding resource-ref elements in the glassfish-application-client.xml file.

    For more information on the glassfish-application-client.xml file, see The glassfish-application-client.xml file in Oracle GlassFish Server 3.1 Application Deployment Guide. For a general explanation of how to map JNDI names using reference elements, see Mapping References.

  4. Ensure that the client JAR file includes the following files:
    • A Java class to access the resource.

    • application-client.xml - (optional) Java EE application client deployment descriptor.

    • glassfish-application-client.xml - (optional) GlassFish Server specific client deployment descriptor. For information on the glassfish-application-client.xml file, see The glassfish-application-client.xml file in Oracle GlassFish Server 3.1 Application Deployment Guide.

    • The MANIFEST.MF file. This file contains a reference to the main class, which states the complete package prefix and class name of the Java client.

  5. Prepare the client machine.

    This step is not needed for Java Web Start. This step is not needed if the client and server machines are the same.

    If you are using the appclient script, package the GlassFish Server system files required to launch application clients on remote systems using the package-appclient script, then retrieve the application client itself using the asadmin get-client-stubs command.

    For more information, see Using the package-appclient Script and the Oracle GlassFish Server 3.1-3.1.1 Reference Manual.

  6. Run the application client.

    See Using Java Web Start or Running an Application Client Using the appclient Script.

Using Java Web Start

Java Web Start allows your application client to be easily launched and automatically downloaded and updated. General information about Java Web Start is available at http://www.oracle.com/technetwork/java/javase/tech/index-jsp-136112.html.

The following topics are addressed here:

Enabling and Disabling Java Web Start

Java Web Start is enabled for all application clients by default.

The application developer or deployer can specify that Java Web Start is always disabled for an application client by setting the value of the eligible element to false in the glassfish-application-client.xml file. See the Oracle GlassFish Server 3.1 Application Deployment Guide.

The GlassFish Server administrator can disable Java Web Start for a previously deployed eligible application client using the asadmin set command.

To disable Java Web Start for all eligible application clients in an application, use the following command:

asadmin set applications.application.app-name.property.java-web-start-enabled="false"

To disable Java Web Start for a stand-alone eligible application client, use the following command:

asadmin set applications.application.module-name.property.java-web-start-enabled="false"

Setting java-web-start-enabled="true" re-enables Java Web Start for an eligible application client. For more information about the asadmin set command, see the Oracle GlassFish Server 3.1-3.1.1 Reference Manual.

Downloading and Launching an Application Client

If Java Web Start is enabled for your deployed application client, you can launch it for testing. Simply click on the Launch button next to the application client or application's listing on the App Client Modules page in the Administration Console.

On other machines, you can download and launch the application client using Java Web Start in the following ways:

When you launch an application client, Java Web Start contacts the server to see if a newer client version is available. This means you can redeploy an application client without having to worry about whether client machines have the latest version.

The Application Client URL

The default URL for an application or module generally is as follows:

http://host:port/context-root

The default URL for a stand-alone application client module is as follows:

http://host:port/appclient-module-id

The default URL for an application client module embedded within an application is as follows. Note that the relative path to the application client JAR file is included.

http://host:port/application-id/appclient-path

If the context-root, appclient-module-id, or application-id is not specified during deployment, the name of the JAR or EAR file without the extension is used. If the application client module or application is not in JAR or EAR file format, an appclient-module-id or application-id is generated.

Regardless of how the context-root or id is determined, it is written to the server log when you deploy the application. For details about naming, see Naming Standards in Oracle GlassFish Server 3.1 Application Deployment Guide.

To set a different URL for an application client, use the context-root subelement of the java-web-start-access element in the glassfish-application-client.xml file. This overrides the appclient-module-id or application-id. See Oracle GlassFish Server 3.1 Application Deployment Guide.

You can also pass arguments to the ACC or to the application client's main method as query parameters in the URL. If multiple application client arguments are specified, they are passed in the order specified.

A question mark separates the context root from the arguments. Ampersands (&) separate the arguments and their values. Each argument and each value must begin with arg=. Here is an example URL with a -color argument for a stand-alone application client. The -color argument is passed to the application client's main method.

http://localhost:8080/testClient?arg=-color&arg=red

Note - If you are using the javaws URL command to launch Java Web Start with a URL that contains arguments, enclose the URL in double quotes (") to avoid breaking the URL at the ampersand (&) symbol.


Ideally, you should build your production application clients with user-friendly interfaces that collect information which might otherwise be gathered as command-line arguments. This minimizes the degree to which users must customize the URLs that launch application clients using Java Web Start. Command-line argument support is useful in a development environment and for existing application clients that depend on it.

Signing JAR Files Used in Java Web Start

Java Web Start enforces a security sandbox. By default it grants any application, including application clients, only minimal privileges. Because Java Web Start applications can be so easily downloaded, Java Web Start provides protection from potentially harmful programs that might be accessible over the network. If an application requires a higher privilege level than the sandbox permits, the code that needs privileges must be in a JAR file that was signed.

When Java Web Start downloads such a signed JAR file, it displays information about the certificate that was used to sign the JAR if that certificate is not trusted. It then asks you whether you want to trust that signed code. If you agree, the code receives elevated permissions and runs. If you reject the signed code, Java Web Start does not start the downloaded application.

Your first Java Web Start launch of an application client is likely to involve this prompting because by default GlassFish Server uses a self-signed certificate that is not linked to a trusted authority.

The GlassFish Server serves two types of signed JAR files in response to Java Web Start requests. One type is a JAR file installed as part of the GlassFish Server, which starts an application client during a Java Web Start launch: as-install/lib/gf-client.jar.

The other type is a generated application client JAR file. As part of deployment, the GlassFish Server generates a new application client JAR file that contains classes, resources, and descriptors needed to run the application client on end-user systems. When you deploy an application with the asadmin deploy command's --retrieve option, use the asadmin get-client-stubs command, or select the Generate RMIStubs option from the EJB Modules deployment page in the Administration Console, this is one of the JAR files retrieved to your system. Because application clients need access beyond the minimal sandbox permissions to work in the Java Web Start environment, the generated application client JAR file must be signed before it can be downloaded to and executed on an end-user system.

A JAR file can be signed automatically or manually.

The following topics are addressed here:

Automatically Signing JAR Files

The GlassFish Server automatically creates a signed version of the required JAR file if none exists. When a Java Web Start request for the gf-client.jar file arrives, the GlassFish Server looks for domain-dir/java-web-start/gf-client.jar. When a request for an application's generated application client JAR file arrives, the GlassFish Server looks in the directory domain-dir/java-web-start/app-name for a file with the same name as the generated JAR file created during deployment.

In either case, if the requested signed JAR file is absent or older than its unsigned counterpart, the GlassFish Server creates a signed version of the JAR file automatically and deposits it in the relevant directory. Whether the GlassFish Server just signed the JAR file or not, it serves the file from the domain-dir/java-web-start directory tree in response to the Java Web Start request.

To sign these JAR files, by default the GlassFish Server uses its self-signed certificate. When you create a new domain, either by installing the GlassFish Server or by using the asadmin create-domain command, the GlassFish Server creates a self-signed certificate and adds it to the domain's key store.

A self-signed certificate is generally untrustworthy because no certification authority vouches for its authenticity. The automatic signing feature uses the same certificate to create all required signed JAR files.

Using the jar-signing-alias Deployment Property

The asadmin deploy command property jar-signing-alias specifies the alias for the security certificate with which the application client container JAR file is signed.

Java Web Start won't execute code requiring elevated permissions unless it resides in a JAR file signed with a certificate that the user's system trusts. For your convenience, GlassFish Server signs the JAR file automatically using the self-signed certificate from the domain, s1as. Java Web Start then asks the user whether to trust the code and displays the GlassFish Server certificate information.

To sign this JAR file with a different certificate, first add the certificate to the domain keystore. You can use a certificate from a trusted authority, which avoids the Java Web Start prompt. To add a certificate to the domain keystore, see Administering JSSE Certificates in Oracle GlassFish Server 3.1 Security Guide.

Next, deploy your application using the jar-signing-alias property. For example:

asadmin deploy --property jar-signing-alias=MyAlias MyApp.ear

For more information about the asadmin deploy command, see the Oracle GlassFish Server 3.1-3.1.1 Reference Manual.

Error Handling

When an application client is launched using Java Web Start, any error that the application client logic does not catch and handle is written to System.err and displayed in a dialog box. This display appears if an error occurs even before the application client logic receives control. It also appears if the application client code does not catch and handle errors itself.

Vendor Icon, Splash Screen, and Text

To specify a vendor-specific icon, splash screen, text string, or a combination of these for Java Web Start download and launch screens, use the vendor element in the glassfish-application-client.xml file. The complete format of this element's data is as follows:

<vendor>icon-image-URI::splash-screen-image-URI::vendor-text</vendor>

The following example vendor element contains an icon, a splash screen, and a text string:

<vendor>images/icon.jpg::otherDir/splash.jpg::MyCorp, Inc.</vendor>

The following example vendor element contains an icon and a text string:

<vendor>images/icon.jpg::MyCorp, Inc.</vendor>

The following example vendor element contains a splash screen and a text string; note the initial double colon:

<vendor>::otherDir/splash.jpg::MyCorp, Inc.</vendor>

The following example vendor element contains only a text string:

<vendor>MyCorp, Inc.</vendor>

The default value is the text string Application Client.

For more information about the glassfish-application-client.xml file, see the Oracle GlassFish Server 3.1 Application Deployment Guide.

You can also specify a vendor-specific icon, splash screen, text string, or a combination by using a custom JNLP file; see Creating a Custom JNLP File.

Creating a Custom JNLP File

You can partially customize the Java Network Launching Protocol (JNLP) file that GlassFish Server uses for Java Web Start.

The following topics are addressed here:

For more information about JNLP, see the Java Web Start Architecture JNLP Specification and API Documentation.

Specifying the JNLP File in the Deployment Descriptor

To specify a custom JNLP file for Java Web Start, use the jnlp-doc element in the glassfish-application-client.xml file. If none is specified, a default JNLP file is generated.

The value of the jnlp-doc element is a relative path with the following format:

[path-to-JAR-in-EAR!]path-to-JNLP-in-JAR

The default path-to-JAR-in-EAR is the current application client JAR file. For example, if the JNLP file is in the application client JAR file at custom/myInfo.jnlp, the element value would look like this:

<java-web-start-access>
   <jnlp-doc>custom/myInfo.jnlp</jnlp-doc>
</java-web-start-access>

If the application client is inside an EAR file, you can place the custom JNLP file inside another JAR file in the EAR. For example, if the JNLP file is in a JAR file at other/myLib.jar, the element value would look like this, with an exclamation point (!) separating the path to the JAR from the path in the JAR:

<java-web-start-access>
   <jnlp-doc>other/myLib.jar!custom/myInfo.jnlp</jnlp-doc>
</java-web-start-access>

For more information about the glassfish-application-client.xml file, see the Oracle GlassFish Server 3.0.1 Application Deployment Guide.

Referring to JAR Files from the JNLP File

As with any JNLP document, the custom JNLP file can refer to JAR files the application client requires.

Do not specify every JAR on which the client depends. GlassFish Server automatically handles JAR files that the Java EE specification requires to be available to the application client. This includes JAR files listed in the application client JAR file's manifest Class-Path and JAR files in the EAR file's library directory (if any) and their transitive closures. The custom JNLP file should specify only those JAR files the client needs that GlassFish Server would not otherwise include.

Package these JAR files in the EAR file, as with any JAR file required by an application client. Use relative URIs in the <jar href="..."> and <nativelib href="..."> elements to point to the JAR files. The codebase that GlassFish Server assigns for the final client JNLP file corresponds to the top level of the EAR file. Therefore, relative href references correspond directly to the relative path to the JAR files within the EAR file.

Neither the Java EE specification nor GlassFish Server supports packaging JAR files inside the application client JAR file itself. Nothing prevents this, but GlassFish Server does no special processing of such JAR files. They do not appear in the runtime class path and they cannot be referenced from the custom JNLP file.

Referring to Other JNLP Files

The JNLP file can also refer to other custom JNLP files using <extension href="..."/> elements. To be consistent with relative href references to JAR files, the relative href references to JNLP files are resolved within the EAR file. You can place these JNLP files directly in the EAR file or inside JAR files that the EAR file contains. Use one of these formats for these href references:

[path-to-JAR-in-EAR!]path-to-JNLP-in-JAR
path-to-JNLP-in-EAR

Note that these formats are not equivalent to the format of the jnlp-doc element in the glassfish-application-client.xml file.

These formats follow the standard entry-within-a-JAR URI syntax and semantics. Support for this syntax comes from the automated Java Web Start support in GlassFish Server. This is not a feature of Java Web Start or the JNLP standard.

Combining Custom and Automatically Generated Content

GlassFish Server recognizes these types of content in the JNLP file:

You can compose a complete JNLP file and package it with the application client. GlassFish Server then combines it with its automatically generated JNLP file. You can also provide content that only adds to or replaces what GlassFish Server generates. The custom content must conform to the general structure of the JNLP format so that GlassFish Server can properly place it in the final JNLP file.

For example, to specify a single native library to be included only for Windows systems, the new element to add might be as follows:

<nativelib href="windows/myLib.jar"/>

However, you must indicate where in the overall document this element belongs. The actual custom JNLP file should look like this:

<jnlp>
   <resources os="Windows">
      <nativelib href="windows/myLib.jar"/>
   </resources>
</jnlp>

GlassFish Server provides default <information> and <resources> elements, without specifying attributes such as os, arch, platform, or locale. GlassFish Server merges its own content within those elements with custom content under those elements. Further, you can provide your own <information> and <resources> elements (and fragments within them) that specify at least one of these attributes.

In general, you can perform the following customizations:

This flexibility allows you to add JAR files to the application (including platform-specific native libraries) and set properties to control the behavior of your application clients.

The following tables provide more detail about what parts of the JNLP file you can add to and modify.

Table 10-1 Owned JNLP File Content

JNLP File Fragment
Description
<jnlp codebase="xxx" ...>
GlassFish Server controls this content for application clients packaged in EAR files. The developer controls this content for application clients packaged in WAR files.
<jnlp href="xxx" ...>
GlassFish Server controls this content for application clients packaged in EAR files. The developer controls this content for application clients packaged in WAR files.
<jnlp>
  <security>
GlassFish Server must control the permissions requested for each JNLP file. All permissions are needed for the main file, which launches the ACC. The permissions requested for other JNLP documents depend on whether the JAR files referenced in those documents are signed.
<jnlp>
  <application-desc>
    <argument> ...
GlassFish Server sets the main-class and the arguments to be passed to the client.

Table 10-2 Defaulted JNLP File Content

JNLP File Fragment
Description
<jnlp spec="xxx" ...>
Specifies the JNLP specification version.
<jnlp>
  <information [no-attributes]>
Specifies the application title, vendor, home page, various description text values, icon images, and whether offline execution is allowed.
<jnlp>
  <resources [no-attributes]>
    <java version="xxx" 
        java-vm-args="yyy" ...>
Specifies the Java SE version or selected VM parameter settings.

Table 10-3 Merged JNLP File Content

JNLP File Fragment
Description
<jnlp>
  <information [attributes]>
You can specify one or more of the os, arch, platform, and locale attributes for the <information> element. You can also specify child elements; GlassFish Server provides no default children.
<jnlp>
  <resources [attributes]>
You can specify one or more of the os, arch, platform, and locale attributes for the <resources> element. You can also specify child elements; GlassFish Server provides no default children.
<jnlp>
  <resources [no-attributes]>
    <jar ...>
Adds JAR files to be included in the application to the JAR files provided by GlassFish Server.
<jnlp>
  <resources [no-attributes]>
    <nativelib ...>
Adds native libraries to be included in the application. Each entry in a JAR listed in a <nativelib> element must be a native library for the correct platform. The full syntax of the <nativelib> element lets the developer specify the platform for that native library.
<jnlp>
  <resources [no-attributes]>
    <property ...>
Adds system properties to be included in the application to the system properties defined by GlassFish Server.
<jnlp>
  <resources [no-attributes]>
    <extension ...>
Specifies another custom JNLP file.
<jnlp>
  <component-desc ...>
Includes another custom JNLP file that specifies a component extension.
<jnlp>
  <installer-desc ...>
Includes another custom JNLP file that specifies an installer extension.

Using the Embeddable ACC

You can embed the ACC into your application client. If you place the as-install/lib/gf-client.jar file in your runtime classpath, your application creates the ACC after your application code has started, then requests that the ACC start the application client portion. The basic model for coding is as follows:

  1. Create a builder object.

  2. Operate on the builder to configure the ACC.

  3. Obtain a new ACC instance from the builder.

  4. Present a client archive or class to the ACC instance.

  5. Start the client running within the newly created ACC instance.

Your code should follow this general pattern:

// one TargetServer for each ORB endpoint for bootstrapping
TargetServer[] servers = ...;

// Get a builder to set up the ACC
AppClientContainer.Builder builder = AppClientContainer.newBuilder(servers);

// Fine-tune the ACC's configuration.  Note ability to "chain" invocations.
builder.callbackHandler("com.acme.MyHandler").authRealm("myRealm"); // Modify config

// Get a container for a client.  
URI clientURI = ...; // URI to the client JAR
AppClientContainer acc = builder.newContainer(clientURI);

or

Class mainClass = ...;
AppClientContainer acc = builder.newContainer(mainClass);

// In either case, start the client running.
String[] appArgs = ...;
acc.startClient(appArgs); // Start the client

...

acc.close(); // close the ACC(optional)

The ACC loads the application client's main class, performs any required injection, and transfers control to the static main method. The ACC's run method returns to the calling application as soon as the client's main method returns to the ACC.

If the application client's main method starts any asynchronous activity, that work continues after the ACC returns. The ACC has no knowledge of whether the client's main method triggers asynchronous work. Therefore, if the client causes work on threads other than the calling thread, and if the embedding application needs to know when the client's asynchronous work completes, the embedding application and the client must agree on how this happens.

The ACC's shutdown handling is invoked from the ACC's close method. The calling application can invoke acc.close() to close down any services started by the ACC. If the application client code started any asynchronous activity that might still depend on ACC services, invoking close before that asynchronous activity completes could cause unpredictable and undesirable results. The shutdown handling is also run automatically at VM shutdown if the code has not invoked close before then.

The ACC does not prevent the calling application from creating or running more than one ACC instance during a single execution of the application either serially or concurrently. However, other services used by the ACC (transaction manager, security, ORB, and so on) might or might not support such serial or concurrent reuse.

Running an Application Client Using the appclient Script

To run an application client, you can launch the ACC using the appclient script, whether or not Java Web Start is enabled. This is optional. This script is located in the as-install/bin directory. For details, see the Oracle GlassFish Server 3.1-3.1.1 Reference Manual.

Using the package-appclient Script

You can package the GlassFish Server system files required to launch application clients on remote systems into a single JAR file using the package-appclient script. This is optional. This script is located in the as-install/bin directory. For details, see the Oracle GlassFish Server 3.1-3.1.1 Reference Manual.

The client.policy File

The client.policy file is the J2SE policy file used by the application client. Each application client has a client.policy file. The default policy file limits the permissions of Java EE deployed application clients to the minimal set of permissions required for these applications to operate correctly. If an application client requires more than this default set of permissions, edit the client.policy file to add the custom permissions that your application client needs. Use the J2SE standard policy tool or any text editor to edit this file.

For more information on using the J2SE policy tool, see http://download.oracle.com/javase/tutorial/security/tour2/index.html.

For more information about the permissions you can set in the client.policy file, see http://download.oracle.com/javase/6/docs/technotes/guides/security/permissions.html.

Using RMI/IIOP Over SSL

You can configure RMI/IIOP over SSL in two ways: using a username and password, or using a client certificate.

To use a username and password, configure the ior-security-config element in the glassfish-ejb-jar.xml file. The following configuration establishes SSL between an application client and an EJB component using a username and password. The user has to login to the ACC using either the sun-acc.xml mechanism or the Programmatic Login mechanism.

<ior-security-config>
  <transport-config>
    <integrity>required</integrity>
    <confidentiality>required</confidentiality>
    <establish-trust-in-target>supported</establish-trust-in-target>
    <establish-trust-in-client>none</establish-trust-in-client>
  </transport-config>
  <as-context>
    <auth-method>username_password</auth-method>
    <realm>default</realm>
    <required>true</required>
  </as-context>
 <sas-context>
    <caller-propagation>none</caller-propagation>
 </sas-context>
</ior-security-config>

For more information about the glassfish-ejb-jar.xml and sun-acc.xml files, see the Oracle GlassFish Server 3.1 Application Deployment Guide.

To use a client certificate, configure the ior-security-config element in the glassfish-ejb-jar.xml file. The following configuration establishes SSL between an application client and an EJB component using a client certificate.

<ior-security-config>
  <transport-config>
    <integrity>required</integrity>
    <confidentiality>required</confidentiality>
    <establish-trust-in-target>supported</establish-trust-in-target>
    <establish-trust-in-client>required</establish-trust-in-client>
  </transport-config>
  <as-context>
    <auth-method>none</auth-method>
    <realm>default</realm>
    <required>false</required>
  </as-context>
  <sas-context>
    <caller-propagation>none</caller-propagation>
  </sas-context>
</ior-security-config>

To use a client certificate, you must also specify the system properties for the keystore and truststore to be used in establishing SSL. To use SSL with the Application Client Container (ACC), you need to set these system properties in one of the following ways:

Connecting to a Remote EJB Module Through a Firewall

To deploy and run an application client that connects to an EJB module on a GlassFish Server instance that is behind a firewall, you must set ORB Virtual Address Agent Implementation (ORBVAA) options. Use the asadmin create-jvm-options command as follows:

asadmin create-jvm-options -Dcom.sun.corba.ee.ORBVAAHost=public-IP-adress
asadmin create-jvm-options -Dcom.sun.corba.ee.ORBVAAPort=public-port
asadmin create-jvm-options 
-Dcom.sun.corba.ee.ORBUserConfigurators.com.sun.corba.ee.impl.plugin.hwlb.VirtualAddressAgentImpl=x

Set the ORBVAAHost and ORBVAAPort options to the host and port of the public address. The ORBUserConfigurators option tells the ORB to create an instance of the VirtualAddressAgentImpl class and invoke the configure method on the resulting object, which must implement the com.sun.corba.ee.spi.orb.ORBConfigurator interface. The ORBUserConfigurators value doesn't matter. Together, these options create an ORB that in turn creates Object references (the underlying implementation of remote EJB references) containing the public address, while the ORB listens on the private address specified for the IIOP port in the GlassFish Server configuration.

Specifying a Splash Screen

Java SE 6 offers splash screen support, either through a Java command-line option or a manifest entry in the application's JAR file. To take advantage of this Java SE feature in your application client, you can do one of the following:

During application (EAR file) deployment, the GlassFish Server generates façade JAR files, one for the application and one for each application client in the application. During application client module deployment, the GlassFish Server generates a single facade JAR for the application client. The appclient script supports splash screens inside the application client JAR only if you launch an application client facade or appclient client JAR. If you launch the facade for an application or the undeployed application itself, the appclient script cannot take advantage of the Java SE 6 splash screen feature.

Setting Login Retries

You can set a JVM option using the appclient script that determines the number of login retries allowed. This option is -Dorg.glassfish.appclient.acc.maxLoginRetries=n where n is a positive integer. The default number of retries is 3.

This retry loop happens when the ACC attempts to perform injection if you annotated the client's main class (for example, using @Resource). If instead of annotations your client uses the InitialContext explicitly to look up remote resources, the retry loop does not apply. In this case, you could write logic to catch an exception around the lookup and retry explicitly.

For details about the appclient script syntax, see the Oracle GlassFish Server 3.1-3.1.1 Reference Manual.

Using Libraries with Application Clients

The Libraries field in the Administration Console's deployment page and the --libraries option of the asadmin deploy command do not apply to application clients. Neither do the as-install/lib, domain-dir/lib, and domain-dir/lib/classes directories comprising the Common Class Loader. These apply only to applications and modules deployed to the server. For more information, see Chapter 2, Class Loaders.

To use libraries with an application client, package the application client in an application (EAR file). Then, either place the libraries in the /lib directory of the EAR file or specify their location in the application client JAR file's manifest Class-Path.