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The development time runtime environment allows developers to test their applications on their desktop before moving the application into a production runtime environment. Usage is limited to a combined 2 GB of memory across all instances of application servers for the licensee in test and production environments. Production usage beyond a combined 2 GB of heap size requires purchase of license entitlements.

Customers with an active support contract for their production WebSphere Application Server are allowed to install the same WebSphere Application Server edition onto developer machines for use in development and testing. These installations of WebSphere Application Server, as well as this no-charge download of WebSphere Application Server, WebSphere Application Server for Developers and WebSphere Application Server Developer Tools for Eclipse, are entitled for support on the developer machine as long as an active support contract is in place for the production server. The following topics are included in this chapter: Performance tuning usually involves the following iterative multi-step cycle: Measure the performance before you apply any changes to the system by using the appropriate monitoring tools, called profilers.

Identify possible bottlenecks, where a single component leads to a performance deterioration of the whole system. Make changes to remove the bottlenecks. Return to step 1 to examine any relevant improvements.

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The cycle ends when the system reaches an acceptable behavior, according to a series of numeric values that you established before you started the process. In the following section, we describe the tuning activities that are available to improve the performance of the Community Edition server. For a complete reference about system tuning, visit the following Web sites: For UNIX systems: To analyze the memory, login to the administrative console, and select Information in the console navigation area, which opens the server information page.

From this page, you can check the following relevant statistics: Figure Server Memory Usage dynamic graphic Note: The feature works in the Mozilla Firefox Web browser. You can find more about the related JIRA issue at: It provides useful information about performance and resources utilization of the JVM. Chapter 6. Tuning 67 The JConsole can monitor: Local applications, running on the same machine as jconsole.

Remote applications. Information about the JConsole tool is at: Start the Community Edition server. Open a prompt command. Start the tool by typing jconsole. The graphic console appears, as shown in Figure Figure JConsole 3. Accept the default settings, and click Connect. JConsole starts with the Summary tab, as shown in Figure on page More details are available by selecting the other tabs, for example, Figure on page 70 shows the Memory tab. Tuning 69 Figure JConsole memory tab The Memory tab shows a chart that displays information about the history of memory usage for different memory pools.

The Garbage Collector gc starts to claim those objects that can no longer be referenced from any other living object. Because the mechanism is an extensive operation, it can slow application execution significantly.

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The goal of properly tuning the heap size is to minimize the overhead of gc to improve the server response and the throughput. A value too high results in high memory consumption and a low number of major slow garbage collection cycles. A value too low results in a high number of minor fast garbage collection cycles. Initial heap size The initial heap size specifies the initial amount of memory that is allocated in the heap when the JVM starts.

Use the following option: Tuning 71 For more information about these settings, see: Community Edition allows the customization of two thread pool sizes: DefaultThreadPool size specifies the maximum number of threads possible in the server. Its default value is ConnectorThreadPool size specifies the pool size of the connector threads in the server and is a subset of DefaultThreadPool. Select the Thread Pools portlet in the console to open the configuration page, which we show in Figure Figure The thread pool configuration page 2.

To monitor statistics that are related to a particular thread pool, click the monitor link corresponding to that pool in the Actions column. A page similar to Figure on page 73 opens. PoolMax The maximum number of threads that Community Edition can instantiate in a thread pool. Lowest Recorded The lowest number of threads used up to now. Highest Recorded The highest number of threads used up to now. Threads in Use The number of threads currently in use. Setting a too low value reduces the throughput because of an increased wait time for a request to be served. Setting a too high value reduces the CPU efficiency because of frequent context switching among the threads.

You must find the proper balance. Modifying the configuration You change thread pool sizes by updating the configuration files, which you cannot do using the adminitrative console. To apply the required changes: Stop the Community Edition server. Open the configuration file with a text editor. Tuning 73 6. Find the following line relative to the existing j2ee-server module configuration: Save the changes, and start the Community Edition server. For more information about the Community Edition tuning and thread pool size handling, see: This chapter contains the following topics: The architecture of Community Edition is such that you can configure any JMS provider for use with it by deploying the resource adapter for that message broker.

When you start a server, the ActiveMQ provider is automatically available. A JMS resource group is a resource adapter module that binds together the related connection factories, queues, and topics. You can also use this portlet to add new connectors. Figure shows the default JMS server configuration that is available when you install and start a Community Edition server. Figure shows the JMS Resources page. Figure JMS Resources 7. ActiveMQ supports both point-to-point and publish and subscribe messaging models.

You can also use ActiveMQ from. The default configuration Figure contains the following connection factory and queues: Chapter 7. Figure shows a partial view of the panel. Figure JMS resource group: Enter Test as the JMS resource group name. You can leave the other fields unchanged, taking the default.

On the next panel Figure , you can add connection factories and destinations queues and topics to the resource group. Add connection factory or destination 4. Select the factory type a. For a queue connection factory as in this example , select javax.


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QueueConnectionFactory from the list. For a topic connection factory, select javax. Messaging 79 5. Enter the details for the connection factory, as shown in Figure Enter the connection factory name, which is TestQCF for the example. Otherwise leave it unchanged as XA. You can leave the other fields blank, and click Next.

The next panel Figure on page 81 shows the newly created connection factory. You can add more connection factories or destinations. Add connection factory results 7. To add a queue, as in this example, select javax. Queue as the destination type, as shown in Figure To add a new topic select java.

Add destination Chapter 7. Messaging 81 9. On the next panel Figure , you can configure a destination name and the physical name to be given for the queue. Enter the destination and physical name. You use the destination name to refer to the actual physical queue from your deployment plans. You can add new destinations and connection factories from this panel.

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IBM WebSphere Application Server Community Edition

When you use the console to create and deploy a JMS resource group, it is available for all deployed applications. When you deploy the resource adapter as part of an EAR, it is available only for that module. You can also choose to deploy the resource adapter server wide using the deploy command. To do this, select the J2EE Connectors portlet in the administrative console, and uninstall the resource adapter.

You cannot remove the default JMS resource group. The uninstall option for default JMS resource group is disabled. Figure on page 84 shows the connector list. Messaging 83 Figure Connector list 7. The corresponding connector must be running to use a specific protocol. You can view and add connectors from the administrative console. When creating a JMS resource group, you have to specify a serverUrl. The protocol for communication between ActiveMQ broker and Community Edition is decided based on the protocol that is specified in the serverUrl, for example, if the serverUrl is specified as tcp: You can manage the connectors by selecting the JMS Server portlet in the console.

Figure on page 85 shows the ActiveMQ connectors in the console. Tcp connector The tcp connector is used for communication with the ActiveMQ broker using the tcp protocol. To use the tcp connector, specify tcp in the serverUrl value when you configure the ActiveMQ server connection in the JMS resource group see Figure on page 78 , for example: By default this connector is started. Refer to the following Web page for a detailed description of the stomp connector: Using the VM protocol has a performance advantage because the message send and receive occurs using direct Java method calls.

The tcp protocol carries the overhead of creating and maintaining tcp connections. Specify the host as localhost and the port as any positive number. This creates a new vm connector. Specify the serverUrl value as: The resource adapter is provided in WebSphere MQ 6. You can also get the resource adapter with WebSphere MQ v6. Table Directory for the wmq. This JAR file provides extended transactional client support. The typical installation of WebSphere MQ 6. You have to select the extended transactional client support from the custom installation option. After you have the com.

Later, you will have to give a dependency to this JAR file from the resource adapter deployment plan. To install the JAR file: Click Install. Figure Define a common library After you install the jar file, you can see it in the list of installed JAR files at the bottom of the same panel, as shown in Figure Figure Installed resource adapter Chapter 7.

Messaging 87 7. The plan contains information that includes: Connection to the WebSphere MQ broker Queue manager name Mapping of queues and topics managed by the queue manager and Community Edition Connection pool size XA transaction support Logging details Example is a sample deployment plan that you can use as a reference. In this case, the traceEnabled property for the MQ resource adapter was set to true, and the traceLevel is set to This logs all of the messages from the resource adapter.

See the following Web site for more information: Messaging 89 7. In the console, select Deploy New. Select the wmq. Figure Viewing the new JMS resource group 7. You configure the inbound resource adapter when you configure MDBs using the activation-spec properties of the openejb-jar. Example on page 91 shows a sample openejb-jar. Similarly, if you are writing an MDB, you need to add a dependency in openejb-jar.

The web. Example shows web. Example web. Example gives a code snippet for accessing the queue. Example is a sample geronimo-web. Example geronimo-web. Messaging 93 7.


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For this to happen, the deployer has to define a dependency to the JMS resource group and specify the real name of the queue or topic in the openejb-jar. Example MDB openejb-jar. Example gives a code snippet for accessing the resources. An order processing example is at: JMS Resources deployment http: WebSphere MQ V6. Using databases Community Edition servers use database pools to provide a mechanism for applications to access databases that are hosted on database managers.

In this chapter, we provide you with an overview of database pools and related components and an example of how to configure a database pool. The database pools also relieve the application from managing things, such as connection pools and timeouts. There are two types of database pools that are available in Community Edition for applications: Server wide A server-wide database pool is available to all deployed applications. You can have more than one database pool on an application server that points to the same or different databases.

You can create server-wide database pools using the administrative console or in a deployment plan. Use the administrative console to start and stop them. To use a resource reference to access this type of database pool in an application, declare a dependency on the corresponding database pool in the application deployment plan. Module scoped A module-scoped database pool is configured in an application deployment plan. It is deployed as part of the application and is started and stopped when the application that owns the database pool is started and stopped.

You cannot create this type of database pool using the administrative console. The resource adapters manage JDBC connections to the databases and work with vendor-specific JDBC drivers to provide applications with access to the data that is stored in databases. Community Edition uses the resource adapters that are developed by open source project TranQL and comes with two types of resource adapters: But only the local transactions are supported by this resource adapter for example, XA transaction support is not available.

Vendor-specific resource adapters These resource adapters provide tighter integration with the corresponding vendor database manager. XA transaction support is available with these resource adapters. See the following resource for more information about configuring vendor-specific resource adapters: Configuring a database connection pool http: You can use the same procedure to add JDBC drivers for other database managers.

Logon to the administrative console, and select the Common Libs portlet. Enter the details of the library file, as shown in Figure The Java libraries are stored in the repository using the following naming convention: But it is a good idea to enter values relevant to the JDBC driver modules, for example: The path to the JAR file in the package Chapter 8. Using databases 99 — File: A string that is based on version numbers used by the vendor — Type: Ensure that you have the following information before you begin the configuration activities: Logon to the administrative console, and select the Database Pools portlet.

Select Using the Geronimo database pool wizard, as shown in Figure Enter a name for the database pool for example, DB2-Pool-1 , and select DB2 as the database type, as shown in Figure Figure Create a database pool: Complete the next page Figure on page with the values that are required to define the driver and database connection: Figure on page shows an administrative console panel for this DB2 V8. Chapter 8. Using databases Figure Create a database pool: You can leave the remaining fields blank to take the defaults. Figure shows an administrative console panel for this configuration.

This step tries to connect to the database using the defined parameters: Review the error message to determine the connection problem, and use the Edit Settings button to modify the parameters for example, DB User name or Password to get the test connection to work. Click Deploy to deploy a deployment plan, which contains a dependency element for the JDBC driver to be used in this database pool. Using databases 8.

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Logon to the administrative console, and from the left pane, select Database Pools. Select Using the Geronimo database pool wizard. Select SQL Server as the database type. Click Next to continue. This example uses the JDBC driver that we added in 8. Figure on page below shows an administrative console dump for these configurations, which were done using a sample SQL Server Database.

If the database pool is correctly configured, you should see message Loaded Successfully in the Driver Status field Figure You can leave the remaining fields blanks to take the default values. Figure shows an administrative console panel with what you will see if the test connection works. Click Deploy to deploy a deployment plan that contains a dependency element for the JDBC driver that is used in this database pool. Figure on page shows an administrative console panel with what you will see if the deployment is successful. You will find that the new entry for example MSSQL-Pool-1 , which we just configured, is added as a server-wide database pool entry.

Using databases Figure List of available database pools 8. In this section, we look at how you can configure a database pool using the Community Edition deploy tool. In this section, we also demonstrate how you can use the embedded database manager, Derby, to a test database application.

Application EMPDemo, which is located in the Community Edition sample application package, is used for the demonstration purposes. Community Edition uses it to store system data. You can use the administrative console to maintain user databases and to run SQL commands on them. Logon to the administrative console, and select the DB Manager portlet. Figure Employee database in the database list 3.

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You can enter multiple SQL commands using a semicolon ; as the delimiter: See Figure on page for an example. To check the content of the table that was just created, select the Application link, which is located next to the Employee database in the database list. The results look similar to Figure Figure View database contents 8.

For this, you need a database plan that contains the information relating to the database. The EMPDemo sample application package has sample database plans for a number of database types. You can use the database plan for Derby, Cloudscape-db-plan. Database plan Before you run the deploy tool, make sure that there is information in the database plan to create a data source for the database.

The following section is a description of critical elements, which need to go in the database plan to define the Employee database. It defines how the application is deployed in the repository. If the user ID and password is not present in the command, the deploy tool asks you to enter them on the command window. Example Deploy command and results C: To deploy the application using the administrative console: Select the Deploy New portlet.

Browse to the location of the EMPdemo Figure Install the sample application 3. Use the following URL to test the application. Using databases Figure EMPdemo sample 8. The wizard deploys the database pool connection in the console. As you already saw, the database pool contains the physical implementation details of the database.

Refer to vendor Web sites for details about the database managers that are not listed here. DB2Driver jdbc: Driver jdbc: OracleDriver jdbc: S QLServerDriver jdbc: Embedd edDriver jdbc: This adapter supports version 1. A Community Edition installation is required on the system where you plan to use the WTP Server Adapter, even if you only plan to manage remote servers with the adapter.

The Eclipse prerequisites for the adapter are at: If you download the packages separately, you must install the Eclipse-SDK package first. WTP All in One package: You can download it from: You install the package by unzipping the downloaded file. In this case, use one of the last two approaches in the list. Select Search for new features to install. Add the following Web site as a remote update site: Click Finish.

A list with the available features is displayed. Click Finish to start the installation. Configuring the server runtime After the server adapter is installed, configure Community Edition server runtime: A list of the available server runtimes is displayed. If you are working with your locally installed server, check the Also create a new local server box to define the local server to the adapter. Chapter 9. Application development tools Figure Selecting a server type Click Next.

Select the IBM 5. In the Application Server Installation Directory field, insert the path where the Community Edition server is installed, as shown in Figure on page Do not use the Download and Install button. You must install the Community Edition Server first. If the Next button is active, click Next.

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This takes you to the next panel where you can define the location, ports, and sign on information for the local server, as seen in Figure This information must match the configuration for the existing server; otherwise, click Finish. Figure Define the parameters for the local host Chapter 9.

Application development tools 9. For local and remote servers, it allows you to deploy applications. To define a server: Open the Eclipse workspace, and select the Java EE perspective. Figure is displayed. Figure Defining a new server 3. In Figure , enter the server host name. If the server is local, use localhost. These parameters must match with the server configuration, as shown in Figure on page For more information about these parameters, review 9.

With this last step, you can add applications that exist in the workspace to the server. Open the Servers view to see the new server, as shown in Figure Figure Servers view 6. If you defined a local server, you can start it by clicking the Start the server icon. If a server is already running using the same ports that you selected, you cannot start the new server. An error message is displayed that informs you that there is already a program using that port; however clicking on the error message connects you to the currently running server.

If the server is a remote server, you must start and stop it from the remote machine that is running.


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  4. After the remote server is configured, it takes some time to show the remote server status. Using the adapter, you can also directly deploy applications that are being developed in the Eclipse workspace, debug, and profile them while they are running on the server. It is possible to configure the following parameters: General Information Figure - Specify the host name and other common settings. In this case, it would be a Community Edition Server runtime.

    Figure Server general configuration section Security Figure - Specify the security settings: The options are: Figure Automatic publishing configuration Port Configuration Figure - specify the ports for this server instance: Figure Port configuration settings Console Output Figure - set the server console output log level. Figure Log level settings Server Startup Figure - Specify the server startup constraints, which is used to track server status during initialization and administration.

    The fields are: Figure Server startup constraint settings Chapter 9. Figure Virtual machine arguments 9. Right-click over the server name to display a context menu, as shown in Figure Figure Server context menu The icons at the top of the view provide common control functions.

    Hover the mouse over a button to display its function, as shown in Figure on page Start the server You can only start local servers using this option. You must start remote servers on the remote system using the startup command. If the remote server is started, the adapter recognizes this and changes the status to Started. Stop the server You can use this option to stop both local and remote servers. Restart the server This option restarts local servers. It stops remote servers but does not restart them. Publish to the server The server re-publishes the code from the workspace to the server, which you can also do automatically with a setting in the server configuration where.

    This option only re-publishes applications that are already installed. To add a new application, use the Add and Remove Projects option. Launch Support pages Launches the support page for Community Edition. You need an internet connection to use this feature. The application is deployed and started into the server, and the Eclipse internal Web browser in case of Web application. An alternative method is to right-click the server in the Server view, and select Add and Remove Projects.

    You must start the server in debug mode. This is only possible for local servers: In the Servers view, right-click a stopped server, and select Debug. Switch to Debug perspective to add breakpoints to your application. When you run the application, the debugger stops the program execution on that breakpoint. See Figure on page This tool analyzes code, checking whether it is portable or not to other servers.

    This is useful because Community Edition server runtime includes classes that are unique to that server. If an application uses these classes, it might impact the portability of the application to other servers. After you install TPTP, you must extract the following file into your workspace: This file contains the rules to be checked against your code: The barcodes can have any orientation, vertical, horizontal or rotated.

    The package can find the all barcodes in a larger image for example a scanned page. JDiagram is a Java component providing Swing applications with the ability to create and present various kinds of diagrams. A few to mention are workflow, flowchart, process, database entity relationship diagrams, organizational, hierarchy and network charts, graphs and trees. Diagram elements, such as shapes and tables, can be attached one to another to form complex structures.

    There are more than stock shapes available and custom ones can be defined too. Its focus is on simplicity and ease-of-use, often requiring only two lines of code to access RESTful web services. Basic usage is very simple: Create a Resty instance, then call one of the content type specific methods to get the contents of an URL.

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