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1Z0-861 exam Dumps Source : Java Enterprise Edition 5 Business(R) Component Developer Certified Professional Upgrade
Test Code : 1Z0-861
Test denomination : Java Enterprise Edition 5 Business(R) Component Developer Certified Professional Upgrade
Vendor denomination : Oracle
: 150 actual Questions
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WALLDORF — SAP today announced it has achieved Java EE 6 Web Profile Compatibility for SAP NetWeaver Cloud, a Java-based platform-as-a-service, as allotment of the SAP HANA Cloud platform. SAP NetWeaver Cloud enables customers to seamlessly extend existing SAP systems with unusual cloud-based applications — developed or provided by customers, SAP partners or SAP. Compatibility with Java EE 6 Web Profile will enable SAP customers and partners developing applications on SAP NetWeaver Cloud to measurably hurry up their evolution and delivery time.
Java EE 6 is the first version of the Java Platform, Enterprise Edition, to define a focused Web Profile subset on which vendors can certify. This subset includes the major technologies of the replete specification, is widely used for developing enterprise Web applications and simplifies the Enterprise Java programming model. Achieving compatibility means that the ecosystem of certified SAP partners can develop robust and scalable packaged applications on SAP NetWeaver Cloud and shape them available to the SAP customer basis via SAP Store. Additionally, they can focus on the traffic value of their applications and attain quit users faster while at the very time delegating the infrastructure and reliability concerns to SAP.
“We developed this technology together with the open source community in the Eclipse Virgo project,” said Bjoern Goerke, executive vice president, Technology & Innovation Platform Core, SAP. “This achievement is a result of SAP’s ongoing rendezvous in open source communities and their commitment to open standards. Their strategy is to champion and enable unusual technologies — first in the cloud — and then shape them available to their on-premise customers.”
A free developer edition of SAP NetWeaver Cloud for developing cloud applications is available here. For more information, visit the SAP Newsroom. supervene SAP on Twitter at @sapnews.
Media Contact:Cathrin von Osten, +49 (6227) 7-63908, firstname.lastname@example.org, CET
By Srinivasan Sundara Rajan
September 17, 2012 08:00 AM EDT
Platform as a Service (PaaS)Platform-as-a-Service (PaaS) represents a complete preintegrated platform offering for the evolution and operation of generic purpose traffic applications. A fully preintegrated and standardized platform - offered in a multi-tenant mode as a managed service - means much less manual application than installing and configuring middleware components in on-premise servers.
Enterprise architecture patterns and framework changed heavily during the final decade, the software / platform / framework upgrades devour up the major chunk of it budgets and leaving relatively smaller portion for traffic innovation.
One of the Important goals of PaaS is to lighten the enterprises from the mischance of upgrades and concentrate on traffic value to clients.
Due to the above out-of-the-box features for enterprises, PaaS is considered an enabler for innovation. The following is a comparison of various PaaS platforms in generic and in particular about Java EE PaaS platforms.
Windows Azure and PaaS for .NETEver since the beginning of this century comparisons between the platform capabilities of Java EE (Java Enterprise Edition) and Microsoft .NET is a common discussion in most of the decision points for the choice of enterprise platforms.
With the advent of Cloud, Microsoft has taken a lead with the Windows Azure PaaS (Platform as a Service).
From a platform perspective Windows Azure provides a complete list of options as available to .NET developers in an ‘On-Premise' setup, which includes:
Full champion for .NET framework and languages dote C#, Visual Basic
Web evolution using ASP.NET
Distributed Processing using WCF (Windows Communication Framework)
Enterprise database champion with SQL Azure
Data Access Services using ADO.net and LINQ
Rich Internet Application champion using Silverlight
Mobile Services for Windows 8 Development
Most key decision makers for Cloud enablement will live left with the questions on how pleasant an equivalent is the Java EE platform.
Java EE PaaS OptionsJava, a counterpart of the .NET platform, was earlier referred to as J2EE but is now called Java EE and it offers several enterprise class features for multi-tiered enterprise development. Java Platform, Enterprise Edition (Java EE) 6 is the industry benchmark for enterprise Java computing. Utilize the new, lightweight Java EE 6 Web Profile to create next-generation web applications, and the replete power of the Java EE 6 platform for enterprise applications. Developers will profit from productivity improvements with more annotations, more POJOs (Plain old-fashioned Java Objects), simplified packaging, and less XML configuration. The below is the comparison two major PaaS Offerings on Java EE.
Google App Engine For Java (GAE For Java)
Redhat Open Shift
However, Java EE PaaS is not restricted to these two. I acquire covered a lot other platforms in my earlier articles. This is done for a more for direct comparison between GAE For Java and Red Hat OpenShift. tickle refer to my other articles below on Java EE PaaS.
Java EE PaaS Innovations : Application Server Interoperability
Java EE PaaS : Offerings From IBM And Oracle
Windows Azure Vs VMWare vFabric
Java EE Support:
Red Hat Open Shift
Google App Engine for Java
The JBoss EAP 6.0 cartridge in OpenShift runs in Java EE6 replete Profile. Highlights of the technologies that developers can assume advantage of include:
Web application technologies for serving web and mobile content, including Java Servlets, JavaServer Pages (JSP), JavaServer Faces (JSF)
Java Persistence (JPA) for data persistence .
Web services and Java APIs for REST-ful services (JAX-RS) for communicating with mobile devices, HTML5 sites, and external systems.
Enterprise JavaBeans (EJB 3.1), Java Message Service (JMS), and Java Transaction API (JTA)
With App Engine, you can build web applications using benchmark Java technologies and elope them on Google's scalable infrastructure.
The Java environment provides a Java 6 JVM, a Java Servlets interface, and champion for benchmark interfaces to the App Engine scalable datastore and services, such as JDO, JPA, JavaMail, and JCache.
App Engine uses the Java Servlet benchmark for web applications. You provide your app's servlet classes, JavaServer Pages (JSPs), static files and data files, along with the deployment descriptor (the web.xml file) and other configuration files, in a benchmark WAR directory structure. App Engine serves requests by invoking servlets according to the deployment descriptor.
Integration / Back-End Components:
Red Hat Open Shift
Google App Engine for Java
OpenShift supports a wide list of application technologies. Each technology is delivered as a cartridge - a pluggable capability you can add at any time. When you create an application you start with a web platform cartridge and then can add additional capabilities as you choose.
The following back quit databases are supported as allotment of the PaaS Platform.
MongoDB is a scalable, high-performance, open source NoSQL database.
MySQL is a multi-user, multi-threaded SQL database server.
PostgreSQL is an advanced Object-Relational database management system
App Engine's underlying datastore is based on BigTable, not a traditional SQL-based RDBMS dote MySQL or PostgreSQL. You may either exercise the low-level datastore API or the JDO or JPA object-relational mapping interfaces provided. Various JDBC wrappers are available for the datastore, and you may soundless live able to connect to in-memory databases such as the H2 database engine or HSQLDB. SQL. In particular, the following are not Supported: join operations,
Inequality filtering on multiple properties,
Filtering of data based on results of a sub query.
Red Hat Open Shift
Google App Engine for Java
OpenShift supports it out of the box without any tooling.
In order to net Seam working on GAE, some workarounds are necessary, as per the documentation available.
Please refer to the article by David Blado PaaS Evangelist for more details on this aspect.
Which PaaS Is perquisite For My Java App.
Cloud Attributes (Auto Scaling , Dynamic Infrastructure) :
Red Hat Open Shift
Google App Engine for Java
Application scaling enables your application to react to changes in traffic and automatically usurp the necessary resources to maneuver your current demand. The OpenShift infrastructure monitors incoming web traffic and automatically brings copies of your web cartridge online to maneuver requests.
The algorithm for scaling up and scaling down is based on the number of concurrent requests to your application. OpenShift allocates 10 connections per gear - if HAProxy sees that you're sustaining 90% of your peak capacity, it adds another gear. If your require falls to 50% of your peak capacity for several minutes, HAProxy removes that gear. Simple!
Automatic scaling is built in with App Engine, rude you acquire to attain is write your application code and GAE will attain the rest. No matter how many users you acquire or how much data your application stores, App Engine can scale to meet your needs.
SummaryThe concept of PaaS tends to bring unusual benefits to the enterprise in terms of managing their core traffic logic and not concentrate much on the framework and other platform components. On top of it, PaaS is built on Cloud IaaS and comes with it, rude the basic benefits of Cloud. In this context both GAE and Open Shift are useful options to evaluate for the enterprises.
However due to the champion for Java EE replete implementation and open standards along with extended champion for common relational databases, Redhat Open Shift provides a better option for porting existing Java EE applications to Cloud.
Highly passionate about utilizing Digital Technologies to enable next generation enterprise. Believes in enterprise transformation through the Natives (Cloud autochthonous & Mobile Native).
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Using unusual techniques of information modeling, indexing, and processing, unusual cloud-based systems can champion cloud-based workloads previously not feasible for high-throughput insurance, banking, and case-based applications. In his session at 18th Cloud Expo, John Newton, CTO, Founder and Chairman of Alfresco, described how to scale cloud-based content management repositories to store, manage, and retrieve billions of documents and related information with snappily and linear scalability. He addresse...
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This chapter is from the book
EJBs, for rude their power and flexibility, are most useful in conjunction with other components of an enterprise application. The J2EE model of enterprise application development—which is described in more detail below—sees EJBs as implementing the bulk of the application's traffic logic and data management. In this model (Figure 1.1), EJBs occupy an architectural 'tier' between the enterprise data sources (relational databases, directory servers) and the presentation elements (clients using Java, servlets, etc). Centralizing the application's traffic logic in EJBs allows a variety of different clients (including clients via CORBA protocols) to shape exercise of that logic and decouples the application from the specific representation of its data in the enterprise data sources.
The leisure of this section describes in more detail some of the J2EE3 and non-J2EE technologies with which EJBs are likely to interact. These interactions are summarized in design 1.2. Some of these technologies are sufficiently Important that they acquire their own chapters in this book.
1.2.1 J2EE technologies
Java 2 enterprise edition (J2EE) is not a technology in its own right; it is an umbrella specification that dictates how a number of other Java technologies are to intraoperate. Not rude of these are relevant to EJB developers, but those that are (particularly JNDI3 and JDBC3) are described in detail in this book. Others (JSP and servlets, for example) will live described briefly. For completeness, this section describes in silhouette rude the technologies that are allotment of the J2EE group. It likewise describes some Important non-Java technologies.
JavaIDL is a Java implementation of the CORBA interface description language (IDL). IDL is a language for specifying the methods of an kick and their properties that is independent of the programming language. JavaIDL is a set of classes, which maps IDL data onto Java stubs that champion the IIOP protocol.1On the whole, EJB developers don't necessity to live too concerned with JavaIDL, except where EJBs necessity to shape express calls on CORBA ORBs. In most cases, the intricacies of JavaIDL are encapsulated—where necessary—in code generated by the EJB server vendor's tools.
JavaBeans activation framework (JAF) is a specification for mapping content handlers to capricious data types (typically MIME types). JAF gets only a brief (one-line) mention in the J2EE Specification; it is included because the JavaMail API has a dependency on it. EJB evolution is not likely to involve direct exercise of JAF.
Figure 1.1. A simplified view of the J2EE application model; EJBs are central to this model, implementing the traffic logic and data management.
Figure 1.2. EJBs in relation to other enterprise application technologies.
The J2EE Connector Architecture (JCA) is a relatively unusual addition to the J2EE standards. It defines a specification by which application servers can allow the components they host to net access to external resources, particularly legacy systems. The term 'connector' is used to record any piece of software that allows this. At present, the major commercial EJB products rude acquire their own proprietary ways of implementing connectors and often provide a orbit of connectors for approved data management systems, dote IBM's CICS or SAP R/3. The problem is that not only are the connectors themselves proprietary and nonportable, the EJB code that makes exercise of them will only labor with that vendor's connectors.
The JCA is an attempt to standardize the provision of connectors. A JCA-compliant product is portable across application servers and provides a uniform manner of access for EJBs; thus the EJB code is likewise portable.
Providing a connector architecture is not straightforward. The systems that are connected may well acquire transactional semantics and necessity to live integrated with the transaction management system of the EJB container. In addition, it may live necessary to propagate the security context of the EJBs' caller into the connector. The JCA takes custody of these issues and others.
At the time of writing, few commercial products are available that champion JCA. The J2EE Reference Implementation, however, provides an implementation of it that can live used to experiment with the technology. JCA is described in more detail in Chapter 18.
The abbrevation 'JCA' is likewise used to denote the 'Java Cryptography API,' but in this book, 'JCA' will never live used in this sense, so there should live no confusion.
JDBC is a specification and API for providing Java program classes with access to relational databases in a vendor-neutral manner. They will acquire much more to state about this later (mainly in Chapter 8, but it is discussed extensively in other chapters as well).
Java Naming and Directory Interface (JNDI) was originally intended to fulfil the very role with respect to directory servers that JDBC does for database servers. That is, it is a specification and API that allows Java code to query and update a directory server. JNDI is soundless widely used for this, especially with LDAP directory servers (see page 178), but it has an additional role in the J2EE architecture. Here the JNDI API is used to retrieve classes that provide access to resources. These resources may live EJBs, database connections, simple data elements, mail servers, and many others. While information about the resource may live stored in a directory server, it may equally not be. The exercise of JNDI for this purpose is to avoid introducing a unusual API just for looking up resources. JNDI is extremely Important to EJB development, and the gross of Chapter 7 is devoted to it.
Java Server Pages3 (JSP) are HTML or XML documents with embedded programmatic content. They are increasingly used for providing a Web-based user interface to EJB and database applications. In practice, JSPs are translated into servlets (see below), and acquire more-or-less the very properties and capabilities. JSP is an alternative technology to Microsoft's lively Server Pages (ASP) and to other server-side Web scripting technologies dote PHP.
Java Transaction API (JTA) is a set of related APIs for Java components to communicate with the various components of a transactional system. In particular, there are APIs for exercise by application components, transaction managers, and resource managers. An EJB product is required to champion the JTA APIs [EJB2.0 17.1.3] to the extent required to allow EJBs to demarcate transaction boundaries. The product can champion the other APIs as well, and it would certainly improve inter-operability to attain so, but at the time of writing, many commercial products attain not provide such support. The implication is that if an EJB product is to assume allotment in a distributed database transaction, it must exercise database drivers provided by the vendor of the EJB product, not the database. This issue, along with others relating to the exercise of JTA, is discussed in detail on page 287.
Many developers misunderstand the role of the Java Transaction Service (JTS), and its relationship to JTA. In fact, JTS is not allotment of the J2EE Specification (at least in Version 1.3), and EJB products are not required to champion it [EJB2.0 17.1.3]. So what is it, and why is it important? The CORBA kick Transaction Service (OTS) Specification defines how transaction context can live propagated between distributed objects. This allows objects on different hosts to assume allotment in the very distributed transaction. This is likewise a goal of EJB technology: If one EJB calls a manner on another and the caller is allotment of a database transaction, then it should live feasible for database labor done by the called manner to live encapsulated into the very transaction as the caller.
JTS specifies the interface between JTA (the transaction management methods that applications will use) and the low-level CORBA OTS. A JTS-compliant EJB product should allow EJBs to intraoperate seamlessly with CORBA components, at least in so far as transaction management is concerned. Although JTS is a specification, Sun Microsystems provides a replete implementation of that specification; when developers talk of 'using JTS,' they often value 'using Sun's implementation of JTS.' As CORBA integration becomes increasingly Important in EJB technology, JTS may become more widespread. At present, most commercial products exercise proprietary techniques for propagating transaction context between EJBs.
Java Messaging Service (JMS) is a Java interface to asynchronous messaging products dote IBM's MQ Series. JMS is becoming very important, as it provides an elegant passage for EJB products to integrate with legacy systems. Version 1.3 of the J2EE Specification and Version 2.0 of the EJB Specification both add increased champion requirements for JMS, and a compliant application server must provide not only an interface to a messaging service, but the actual infrastructure of a messaging service as well. The JMS architecture and its integration with EJBs, is discussed in detail in Chapter 10.
JavaMail is a specification for Java components to ship and receive email messages in a vendor-neutral way. Although it is a specification and not an implementation, in drill most developers who are using it are actually using Sun's implementation, which provides champion for SMTP, IMAP, and POP3 mail protocols. EJBs can exercise JavaMail to ship email messages, as described on page 584.
Servlets are Java program classes that extend the functionality of a Web server. When a Web browser makes a request that corresponds to a servlet, the Web server calls the class's service() method. This manner must generate content (usually HTML or XML) to live conveyed back to the browser. Servlets and JSPs are widely used to provide a Web interface to an EJB application; this technique is discussed in detail in Chapter 17.
1.2.2 Related technologies
Common kick Request Broker Architecture (CORBA) is a set of standards for allowing objects to interact in a distributed environment. In a sense, this is what EJB technology aims to do, and it is often thought that EJB and CORBA are competing technologies. There is indeed an overlap between what EJB servers attain and what kick request brokers do. The EJB developers acquire neatly sidestepped this issue by integrating some of the CORBA specifications into EJB. In particular, the IIOP protocol, which CORBA uses for communicating method-call information over a network, must now live supported by compliant EJB products. There is, of course, more to CORBA than remote manner calls; Sun's developers acquire been very industrious integrating other CORBA services into the Java environment. This is particularly evident in the evolution of JTS. The details of CORBA are beyond the scope of this book, although they will debate those aspects that overlap with EJB technology (page 37).
The CORBA and IIOP specifications are defined and maintained by the kick Management Group (OMG), a big consortium of vendors and other interested parties. The size of the OMG means that its standards acquire very broad support, but it can assume a long time to reconcile to changes in technology. One vendor that is notably absent from the OMG is Microsoft, which has its own proprietary techniques for distributed computing, such as DCOM (see below). The relationship between EJB and CORBA is set out in detail in [EJB2.0 19.5].
DCOM, COM+, .NET
Microsoft's Distributed Component kick Model (DCOM) and its successor COM+ are proprietary distributed kick technologies from Microsoft. They are central components of Microsoft's integrated enterprise application framework called '.NET,' which includes a distributed transaction infrastructure, messaging services, Web components (based on ASP), and a database server.
While there are undoubtedly advantages to structure a system from a set of products by a separate vendor (there should live minimal problems with interoperability, for example), there are disturbing disadvantages as well. The most obvious of these is the difficulty of integrating products from other vendors. Another problem is Microsoft's continued unwillingness to bear versions of their products that elope on Unix platforms; the majority of enterprise applications are deployed on Unix-based systems, even if something else is used for development.
Although Sun has not escaped criticism for its attempts to maintain control of the Java and J2EE standards, these standards are fully publicized and anyone can sell products that champion them. The problem with Microsoft's offering is that the very company controls both the products and the specifications. Being in a position to attain this puts a vendor at a huge advantage. Consider, for example, the assignment of producing integrated evolution environments (IDEs) to champion the production of enterprise systems. It should live fairly transparent that producing such tools is much simpler if everything the tools will labor on is a product from the very vendor. If it proves to live impossible to achieve what is desired by users of the tools, no problem: They can change the underlying technology. This is simply not an option with a standards-based platform. Spare a thought for those valiant souls who develop integrated evolution tools for J2EE: The tools must live able to generate and maintain code that complies with about 20 different open standards, rude of which are developing rapidly under the pressure of about 100 major vendors. This is why it remains accurate that integrated utensil champion for J2EE is underdeveloped.
Use of Microsoft's distributed component technology does not preclude integration with EJBs. allotment of Sun's J2EE champion is a set of products that enable non-Java software to live clients of EJBs. These products, known collectively as client access services (CAS), currently champion Microsoft COM and ActiveX clients (see developer.java.sun/developer/earlyAccess/j2eecas). Essentially these products exercise IIOP bridging technology, in which COM interactions are translated into IIOP interactions.
Extensible markup language (XML) is probably the most widely hyped, least understood of rude the current enterprise technologies. In fact, XML is extremely simple; the cleverness is in the exercise which is made of it.
XML is a general-purpose language for describing data. Superficially an XML document resembles HTML, in that sections are demarcated using tags. What goes in and between these tags is entirely at the discretion of the developer, provided that basic syntactic integrity is maintained. This allows the format to live adapted to suit a big number of applications. In addition, the structure and content of the tags can live described formally in a document character definition (DTD), which allows the receiver of an XML document to ensure that the document is structured in a passage that can live interpreted.2
XML owes its success to a number of factors:
It enjoys wide industry support. Among other things, this means that XML parsers and document assemblers are widely available.
It is a completely open standard.
The basic structure of an XML document can live checked against its DTD. This is particularly Important in business-to-business applications, where the sender and receiver of a document may live very different kinds of traffic and may not labor closely together.
Organizations involved in business-to-business (B2B) e-commerce are particularly excited about XML. To discern why, account that at present the majority of B2B transactions are carried out using proprietary EDI (electronic data interchange) services. These services are elope by a tiny number of specialist providers, and are funded by subscription. In addition, many transactions are not carried on the Internet, but on private EDI networks, likewise maintained by specialist providers. The exercise of these services can live extremely expensive. In addition, the data formats used in EDI are often proprietary, and subscribers can easily by locked into a particular provider. With this background, it's simple to discern why XML, which is open, flexible, and can readily live carried on a public network (with suitable encryption), is taking the B2B world by storm.
Although XML as a benchmark is well-supported, this does not necessarily value that two XML-enabled applications can exchange data; this is one of the most widespread misconceptions about XML. To exchange data, the applications must at a minimum harmonize on a common DTD. As the exercise of XML has increased, big numbers of 'standard DTDs' acquire been defined by various industries. There are, for example, benchmark DTDs for data as diverse as livestock trades, curricula vitae, and interactive teaching materials. Having agreed on the DTDs, the collaborating organizations must harmonize on a protocol by which the XML documents will live encoded and transmitted.
So what does rude this acquire to attain with EJBs? The retort at present, sadly, is 'not much.' The EJB Specification only stipulates the exercise of XML for deployment descriptors (files that specify configuration data to the server). There's nothing to halt the developer coding EJBs that exercise XML for data interchange, but there is no built-in champion for this. In particular, there is widespread interest in using XML to carry objects in EJB manner calls (techniques for doing this are discussed on page 42) but EJB products aren't required to provide any support; it's up to the developer to implement it.