IBM WebSphere products and BEA Tuxedo Server integrated solutions, Part 1: Use XMLink Wrapper simplify IBM WebSphere Application Server customer premises Bea Tuxedo Server server programming model
This paper describes a XMLink Wrapper the overall structure design, implementation mechanisms, as well as on XMLink Wrapper pattern of development. Use XMLink Wrapper can be easily IBM WebSphere Application Server (as a client) and BEA Tuxedo Server (as a server) integration.
Prolifics XMLink development of the company is a specialized for BEA Tuxedo transaction-based middleware technology development of data applications, business integration adapter products. The adapter called the XMLink Tuxedo Adapter. It can be connected to the J2EE applications based on BEA Tuxedo development of the services, especially for IBM WebSphere Application Server based on the development of EJB, Servlet and JSP, as well as WebSphere Business Integration Family development of the corresponding processes, and service. However, the use of more complex XMLink, programming is more difficult. XMLink Wrapper reasonably extracted XMLink Tuxedo associated with the underlying operating details of its packaged as reusable, simple interface components, thereby greatly reducing the WebSphere Application Server and Tuxedo between application integration more difficult.
I. Introduction XMLink
[Note: the content of XMLink brief reference documents are translated from 1].
XMLink structure is entirely consistent with the norms of J2C/J2EE structure, which is specialized for Tuxedo realized J2C connector. Therefore can be easily with the other Java application interoperability.
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Long time no examination, IBM is through the schools and partners, opened WebSphere courses and the opportunity to participate in the examination of IBM's 285, passed.
Test 285 (Developing with WebSphere Studio V5.0) test for use mainly WebSphere application development technologies junior developers, especially the use of IBM products involved in Web Development professionals and students. These officers primarily engaged in the development of J2EE Web applications, Java applications in the process of developing the design, implementation, testing and deployment of such links work. Generally speaking, these applications used mainly Servlets, JavaServer Pages (JSP), HTML, JavaBeans, as well as technologies such as JDBC. These developers will use object-oriented analysis and design techniques, the proper use of IBM WebSphere Studio family of development tools, and demonstrated its use of the Java language simple Web application development capabilities.
IBM WSAD examination is 285 (WebSphere Studio Application Developer) entry-level examinations, the examination content is not more than, that is the basic use WSAD. The study, WSAD familiar with the needs of the environment, look at the help, and do experiments, the best look at IBM's Redbook, An Introduction to IBM WebSphere Studio Application Developer oriented. It must be noted that we normally use are Chinese environment, the examination of the test is in English, so some may be difficult to sit in the right terms, it needs attention. As long as its done under development, and then before the examination done on the simulation that will surely passed.
WebSphere DataPower topic: Based on WebSphere DataPower SOA Appliances building Web services security gateway
This paper introduces DataPower features, and elaborated on how to build Web services based on DataPower security gateways, and the adoption of specific scenes and configuration examples demonstrate and prove DataPower as Web services safety net, which can effectively meet the Web services security Network legitimacy of the visit, data confidentiality and integrity of these three needs.
1 Introduction WebSphere DataPower SOA Appliances
IBM WebSphere DataPower SOA Appliances (hereinafter referred to DataPower) is IBM for service-oriented architecture (SOA) to introduce another important product.
As more and more enterprises to adopt SOA improve operational flexibility, they found that XML and Web services - the basis of the current SOA - brought performance bottlenecks, security risks and operation, the structure and complexity of the infrastructure work. DataPower is the industry's response to these needs have emerged. DataPower is uniquely designed, easy-to-deploy SOA special equipment (1 U, can be rack-mounted), which for XML-Aware Network, and Ethernet connectivity with external systems through simple configuration (without writing process) can be seamless connection to existing IT infrastructure, in order to simplify the application and XML Web services deployment, improve system performance and enhance the security of the implementation of SOA, and so provided a powerful support.
DataPower the major features include:
Helping to ensure the security of Web services - including XML security protection, XML encryption, digital signature, WS security, XML Access Control, the joint identity management.
SOA-oriented, support and old mainframe application - the conversion between heterogeneous information, protocol bridging.
Network hubs of arbitration services and news agency services Light - fast, which can be expanded news conversion, routing and log service.
Web services management - service-level management, internal security, WSDM.
"Wire speed (wire speed)," to accelerate the dynamic portal - XML to HTML conversion.
DataPower product family includes the following three products: WebSphere DataPower XA35, WebSphere DataPower XS40 and WebSphere DataPower XI50. They were focused on the functional task of dealing with XML acceleration, XML / Web Services security and enterprise messaging bus and application integration, detailed Products please refer to IBM's Web site DataPower Home.
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WebSphere Application Server V4.0x version of the Web server and WebSphere application server to use the transmission of the HTTP 1.1 (transport) to communications, Version 4.0, using the OSE (Open Servlet Engine) agreement. Well, WebSphere V4.0x plugin (plug-in) is how to deal with the HTTP request?
Understanding of the plug-in the handling of HTTP request mode will help you deploy applications of static and dynamic pages pages At the same time, such as when you have not visited all the JSP and small service procedures (servlet), can not be accessed specific the JSP and small service procedures and so on, and also helps your positioning problem and solve the problem.
This article will deal with plug-in models described.
When the Web server receives an HTTP request, the plug-ins need to confirm whether the request is running on the WebSphere to a Web application. If this request should not be dealt with by WebSphere, back to the Web server plug-in a code to tell the Web server to handle the request. If this request should be handled by WebSphere, the need to identify the corresponding plug-in applications in which nodes operating in the clones (clone), the needs which should be determined to deal with this request cloning.
Rules governing the use of plug-in document-cfg.xml plugin configure, the default position <WAS_HOME> / config. Below is a simple plugin-cfg.xml example.
<? Xml version = "1.0">
<Log LogLevel="Error" Name="C:\WebSphere\AppServer40\logs\native.log"/>
<ServerGroup Name="websphere/Default Server">
<Server CloneID="to0oee2t" Name="Default Server">
<Transport Hostname="websphere" Port="9080" Protocol="http"/>
<Route ServerGroup = "websphere / Default Server"
UriGroup = "websphere_sampleApp / default_app_URIs" VirtualHostGroup = "default_host" />
<Route ServerGroup = "websphere / Default Server"
UriGroup = "websphere_sampleApp / examples_URIs" VirtualHostGroup = "default_host" />
When a Web server at the HTTP request, the plug-in XML configuration file View Routing (Route), a routing information to determine the two, and UriGroup VirtualHostGroup. We request http://localhost/servlet/hello as an example to explain.
If the configuration file in VirtualHostGroup the definition of plug-in to the request of the domain name and port and VirtualHostGroup VirtualHost defined in the match. If the configuration file does not exist VirtualHostGroup the definition of plug-ins will assume that all the routing and virtual console match. In this case, because the HTTP request for the default port 80, so the request for the domain name and port localhost: 80, and <VirtualHostGroup Name = "default_host"> in the definition of <VirtualHost Name = "*: 80" /> Phase match.
If the configuration file in UriGroup the definition of plug-in to the request URI and URI UriGroup defined in the match. If the configuration file does not exist UriGroup the definition of plug-ins will assume that all the routing and URI are matching. In this example, the request for the URI / servlet / hello, and <UriGroup Name = "websphere_sampleApp / default_app_URIs"> in the definition of <Uri Name = "/ servlet / hello" /> match.
If the request can be matched to the corresponding VirtualHostGroup and UriGroup, and the corresponding VirtualHostGroup and UriGroup belong to the same routing (Route) definition, the request will be sent to the definition of the Route ServerGroup to implement. In this example, the matching Route defined as:
<Route ServerGroup = "websphere / Default Server"
UriGroup = "websphere_sampleApp / default_app_URIs" VirtualHostGroup = "default_host" />
Therefore, the request will be sent to <ServerGroup Name = "websphere / Default Server"> to enforce.
According to the application server has been cloned, ServerGroup possible definition of one or more server (Server), the next step is to determine the request should be sent to ServerGroup in which a server.
First, the plug-in to examine the request of relatives of the session (session affinity). If the request of relatives of the session cookie that this conversation in the previous request has been assigned to a particular application server. Servlet 2.2 comply with the norms: "Within an application that is marked as distributable, all requests that are part of a session can only be handled on a single VM at any one time," when the conversation has been allocated to a server, the request must be sent to the same server. Plugin URL in the header or find the cookie called JSESSIONID, if JSESSIONID exist, and includes CloneID, and this CloneID ServerGroup and in the definition of a server (Server) CloneID match, the request will be sent to the server.
If the session relatives (session affinity) has not been established, it will be in accordance with the rules of load balancing to this request and distribution of a server session. Default rules Round Robin (Round Robin). Round Robin is the starting point for random, which means that a server is randomly selected, and then to start circulating. Therefore, the multi-process Web server, different processes were randomly selected its starting point, and will not be regarded a request sent to the same application server, application server ensures the use of balance; On the other hand, not all conversation handled by the same process, so the overall Web server from the point of view, Round Robin is not absolute. Another load balancing rules Random (Random), under such rules, the session will be randomly assigned to the available application servers.
In this example, the <ServerGroup Name = "websphere / Default Server"> only definition of a server, <Server CloneID = "to0oee2t" Name = "Default Server"> Therefore, the request will be sent to the server.
Confirmed the application server, the use of plug-ins must determine what transmission (Transport). Each server can send one or more definition, but if the same types of transmission of a number of definitions, such as the definition of a number of HTTP transmission, then the configuration file in the first transmission will be used. The table below shows how the plug-in HTTP and HTTPS requests mapped to the application server can be transmitted:
The agreement to receive the application server requests only HTTP transmission application server application server only HTTPS transmission have both HTTP transmission HTTPS transmission HTTP HTTP HTTPS HTTP HTTPS HTTP HTTPS HTTPS
Once confirmed the transfer, plug-ins can be transmitted from the definition of console ports, and an agreement to send send the request.
In this example, the <Server CloneID = "to0oee2t" Name = "Default Server"> only definition of a transmission <Transport Hostname = "websphere" Port = "9080" Protocol = "http" /> Therefore, the use of plug-in will The transfer, the request will be sent to the HTTP protocol to the mainframe "websphere" 9080 port.
As big customer base on Notes / Domino world wide, Domino is recognized as a successful and reliable application infrastructure. Why not using this as our portal Framework to save existing investment of our customer. What is the benefit of putting Websphere Portal and Lotus Domino together ?
One of the most common challanges in developing large-scale Domino Web applications is to make Domino HTTP to access scale and perform well under a heavy load. It is possible to do that but it needs a lot of efforts and experience to implement the cache strategies .
In order to combine the strength and scalability of a J2EE application platform with the strong collaboration and document-centric capabilities of Domino. We may need to know the benefits to combine Portal and Domino:
1. Deeply Integrated: Websphere Portal provides the most robust integration with IBM's entire SW portfolio including Lotus Infrastructure
2. Open: Integrate Lotus Domino to become key open standards for portal industry
3. Secure: You can use Lotus Domino Directory with Portal to provide granular security level
4. Flexible: Provide Domino application with a wide range of client devices
5. Global: Supports multiple languages to support your organization
Next, I will continue to post some blog documents to show how can we portalize a Domino application
Environmental products: WebSphere MQ
Question: If Oracle V8.1.7 user database, launched WebSphere MQ v5.3 queue manager reported similar errors below:
AMQ6188: The system could not dynamically load the shared library '/ var / mqm / jdbcora' due to a problem with the library.
The error message was' The system call does not exist on this system. (MQPlugInit) '.
The answer is provided by the WebSphere MQ output makefile should MQStart symbol, WebSphere MQ V5.3, the use of xcsLoadFunction function dlopen () instead of load () loading the export and use of dlsym () MQStart symbol of the output, while in the past If the version of WebSphere MQV5.2 not. WebSphere MQ APAR IY38407 a detailed description of the problem.
WebSphere MQ V5.3 CSD03 installed above can be solved this problem. WebSphere MQ V5.3 proposal to install the latest patches.
WebSphere MQ V5.3 patch download Web site is:
Application procedures will be moved to the platform from the competition WebSphere Application Server need to consider many issues, one of which is how to integrate the use of proprietary API moved to the J2EE standard. In this paper, several of the specific WebLogic Server API moved to the use of WebSphere Application Server options.
Application procedures will be moved to the platform from the competition WebSphere Application Server need to consider many issues, one of which is how to integrate the use of proprietary API moved to the J2EE standard. In this paper, several of the specific WebLogic Server API moved to the use of WebSphere Application Server options. As J2EE proprietary API and not directly correspond to the components, so people began to consider some alternatives, each of which has a different compromise choice.
Servlet2.3 API interface is in the introduction of the. Examples of this type (it was registered in the Web-module deployment descriptors) respond to a collection of life-cycle events, such a pool is due to the state Web container triggered by the change.
ContextInitialized (ServletContextEvent) in the Web module is ready to deal with the request, by calling the Web containers. In other words, the method is the application server configured all of its resources, Web containers has been launched and all have been pre-printed in the Servlet (if necessary) after being called. This is the cache and pre-acquisition value or the provision of the necessary needs of the target after a good place. ContextDestroyed (ServletContextEvent) method notice is the role of Web module will be closed.
In WebSphere Studio Application Developer in the creation of a
ServletContextListener (J2EE 1.3/Servlet you must do so under the item 2.3), in your Web application projects in the right-click Java Source, and then select New => Life-cycle Listener . The use of New Life-cycle Listener Wizard (shown in Figure 2) to create javax.servlet.ServletContextListener instance of the class. Ensure that the options add thelistener to the deployment descriptor
(web.xml) were selected.
WebSphere Application Server Enterprise Information Centre in order to obtain a complete description). Bean is launching a special session Bean, which is only in the application prior to commencement of the EJB container loading and enforced. And some of our early research-oriented Web applications for application solutions, Bean started when the start-up method is called, all J2EE modules (including Web and EJB module) have been included in, and the full Bean use J2EE EJB and all other characteristics, and not have to worry about timing dependent. In addition, the successful completion of the implementation Bean started before the application process will not be complete its start-up.
Beans start directly dependent on specific business applications: Together, they defined in the EJB module in the usual EJB. In the enterprise applications and all its modules and be recorded in the initialization and after the procedure should be used in the introduction to any request before each startup Bean Remote Interface start () method has been called to complete the application startup need to do anything at the same time there is a stop () method, it is in the enterprise applications before calling a halt.
To allow applications will be marked for the launch of Bean Bean, application developers must be bound by the following conditions:
- Bean must be the interface with the remote EJB 2.0 Session Bean. The Bean local interface must be
com.ibm.websphere.startupservice.AppStartUpHome(this interface in the WebSphere Application ServerEnterprise
startupbean.jarincluded in the definition).
- The Bean remote interfaces must be
- AppStartUp interface in the start () and stop () method can include any matter Properties (TX_MANDATORY exception). This is to ensure that the Bean create its own affairs (if necessary).
Bean can be a state, it can also be a free state. If there is the state, can be used as examples of the same start () and stop (). EJB environment variables
java: comp / env / wasStartupPriority (integer values) can be used to start-up Bean was called in the order. This makes sorting can be specified (if in a module in the number of activated Bean). Bean to start and stop the reverse order. This ensures that sort relations between the start Bean.
Bean can be activated visit deployed in the application server of all resources (such as data sources, queues, etc.), as well as deployed in the enterprise applications of all the J2EE resources. For example, start Bean Bean can be used with asynchronous connections make preparations for entities such as Bean cache, set up threads or scheduled work tasks matter. (Asynchronous Bean is effective application server thread management, which used to provide J2EE because of the lack of application threads refused to support the service. For more information, please refer to WebSphere Application Service Enterprise Information Center .)
You can WebSphere Studio Application DeveloperIntegration Edition (hereinafter referred to as Application Developer) to create start Bean. You can start in the Bean added to the EJB projects, the need to put the necessary documents
startupbean.jar added to the project of constructing the path (this library included in the run-time support for the code activated Bean). Concrete steps is to open the Properties dialog EJB projects, select Java Build Path page. In the Libraries tab, choose Add Variable. In the dialog box that appears, "New Variable Classpath Entry" dialog box, select the WAS_EE_V5 variables, and then select Extend. "Variable Extension" dialog box, started lib directory, and then select startupbean.jar. Click OK. The results shown in Figure 6.
You need to do is to create in the process of Application Developer successfully completed the WebSphereApplication Server Enterprise, the library will be automatically included into the path of operation.
T3StartupDef Interface Documentation
- T3ShutdownDef Interface Documentation
About the author
Wayne Beaton is IBM Software Group's WebSphere software services of a senior software consultant. His research will focus on the early version of WebSphere products and the competition moved to the WebSphere Application Server 5.0. He co-authored with others on the relocation of the two themes of IBM Redbooks. Wayne to a variety of roles he has been involved in many other interesting work, including WebSphere Skills Transfer programming and the usual advice. Wayne likes to use his leisure time to convince people believe Extreme Programming, remodeling and unit testing is actually very effective. You can firstname.lastname@example.org contact with him.
Sree Anand Ratnasinghe is IBM WebSphere software consultancy services software engineers. Sree WebSphere Application Server is the early version of the developer. She is now a WebSphere Enablement Consulting Team members, she realized proof-of-concept (proofs-of-concept), the WebSphere Application Server and WebSphere product family interested customers to provide guidance. Sree with Carnegie Mellon University (Carnegie Mellon University) information network master's degree.
IBM's WebSphere is a set of software products, including WebSphere application server, WebSphere Studio and WebSphere Performance Pack. There will be the order of entry into other products as a complement and extend. He is IBM network infrastructure software, can be e-business application development and integration middleware, from simple web to complex business transactions, it can be fully supported.
WebSphere can be 35 to operate on the operating system platform, with the exception of the computer, can also be used PDA, information appliances and other products, and strong cross-platform capabilities.
WebSphere is now the world has been used more than 35,000 enterprises, and the ninth consecutive quarter of double-digit growth are over. 1999, application servers (Application Server), IBM's market share was 14 per cent, while in 2000, this figure had risen to 30 per cent in the market is the hope of a ride. Recently, the scene of IBM middleware (middleware) WebSphere platform will be introduced version 4.0 is expected to further enhance IBM in the application server market share, market leader BEA Systems pose a threat. Currently in the global WebSphere application server products ranked second after BEA Systems's WebLogic, but in the Asia Pacific region has been ranked first. IBM and WebSphere software with the information intermediary in the world has a MQSeries as high as 75% of the market share.
WebSphere Application Server allows you to achieve development for Servlet "one wrote, where the use of" objective. The product includes a Java-based Servlet engine, independent of the Web server and its based on the operating system. WebSphere Application Server provides a server plug-in option, with the most popular application programming interface (API) compatible. Supported by the Web server are:
L IBM HTTP server
L Apache Server
L Lotus Domino Go Webserver
L Netscape Enterprise Server
L Netscape FastTrack Server
L Microsoft Internet Information Server
Apart from the Servlet engine and plug-ins, WebSphere Application Server also provides:
1. JavaSoft Java Servlet API Implementation, as well as the expansion and additional API.
2. Examples and documentation, examples and Servlet Web site demonstration of a simple application and advanced technology. Online and print documentation for your Quick Start, and help control the use of server advanced features and the expansion of a basic demonstration examples of applications.
3. WebSphere application server management, the use of a graphical interface, easy:
(1) into the local and remote settings options Servlet
(2) initialization parameter settings
(3) Management Servlet
(4) designated alias Servlet
(5) to create a chain and Servlet Filter
(6) the commissioning of Lightweight Directory Access Protocol (LDAP) directory support
(7) records Servlet news
(8) the opening of JVM debugging
(9) Monitoring the use of the WebSphere application server resources
Use of IBM ® DB2 ® high availability disaster recovery (HADR) and automatic re-routing capabilities client that can be client applications from the database server failure to recover, and can minimize disruption. This article introduce you to use IBM WebSphere ® Application Server Network Deployment V6.1 as a client application and use DB2 HADR and automatic re-routing capabilities client build high availability database environments steps.
IBM DB2 Universal Database (UDB) Enterprise Server Edition V8.2 introduced as a new high availability disaster recovery (HADR) high availability features, through data from the main database will be copied to the standby database for client applications Failure to provide a transfer function. This makes client applications can be conveniently from the partial or complete disaster recovery. In addition, DB2 HADR client with automatic routing (ACR) functions associated with the disaster recovery of its client application is actually transparent.
For example, IBM WebSphere Application Server Network Deployment (ND) V6.1 use DB2 to store their applications persistent data. WebSphere Application Server applications need only to connect with the main database can be. In order to remain in the standby server synchronization copy of a database, the system will be consistent DB2 HADR log files from the main server to the backup server to send them to maintain synchronization. When the main server offline (plan or plans of downtime), backup server will be on-line in his place. In the re-opening of the client automatically routing functions, DB2 re-routing logic will check whether the backup server can be found. If we can find, re-routing will be the first to try to connect the main server failure, if the operation failed, the re-routing will be trying to connect to the standby server alternative. At this time, WebSphere Application Server will be the re-establishment of the standby server connectivity, and rollback affairs, and then released again on the backup server. DB2 HADR fault entire process of transfer of WebSphere Application Server ND application process is transparent.
Development of PHP in the web has been occupy a place, whether it is a small-scale web applications, or as Yahoo such a large site. PHP and Java has been in the form of a competitor, if we can use PHP and Java at the same time, then this competition could change the status quo. To the flexibility of PHP and Java with the power of developing web applications may no longer be so complex as it is today, and will become a treat. The paper will describe can be a combination of PHP and Java method and through PHP Integration Kit for IBM's open-source server WebSphere Application Server Community Edition support PHP script. Through the study in this paper, readers can grasp the principle of PHP Integration Kit; text of the sample that the feasibility of this technology.
Background and the principle of
PHP is a web application in the development of the very popular scripting language. When we use PHP as a server-side script (This article will not discuss the command line running PHP PHP preparation and the use of desktop applications), the need to run in the Apache HTTP server or the Microsoft IIS web server. Although we can Apache HTTP server configuration at the same time PHP and JSP support, but need to PHP and JSP requests were forwarded to the corresponding PHP engine or Java application server in PHP and JSP code between scripts do not have relations, and also not in a HTML pages in the mixed use JSP and PHP script code. Through PHP Integration Kit for WebSphere ® Application Server (WAS), Community Edition (CE), we will be able to integrate PHP script Java ™ 2 Enterprise Edition (J2EE) applications, for example, through the Container Managed Security (CMS) to control the PHP script access, WAS CE through the management console to install / update PHP applications, Java Filter technology can be modified to include a PHP script HTML pages. You can IBM alphaWorks Web site to find the latest information on this project, is currently supporting a platform that Windows and Linux, but now this project can not be used in the product environment.« go back — keep looking »