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Test Code : 1Z0-898
Test title : Java Platform Enterprise Edition 6 Java(R) Persistence API Developer Certified Expert
Vendor title : Oracle
: 63 existent Questions

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Oracle Java Platform Enterprise Edition

Oracle Java habitual edition Runtime atmosphere | killexams.com existent Questions and Pass4sure dumps

Oracle Java commonplace version Runtime environment (also called JRE SE, Java SE or Java SE Runtime atmosphere) is a closed-supply and freely allotted computer know-how that offers a straightforward method to elope Java programs on any Linux-based mostly operating equipment.

Invented by using solar Microsystems

firstly invented by sun Microsystems for interactive television, the software became prior to now known as Java 2 Platform, routine edition or J2SE. It changed into later got with the aid of the Oracle organisation that now actively develops and continues the supply code.

it's referred to as Java SE (usual version) because the know-how is additionally distributed as a Micro version (ME) and an commercial enterprise edition (EE), which can exist create most efficient for embedded systems/cell instruments and commercial enterprise computing structures respectively.

allotted as binary programs for All Linux distributions

The challenge enables users to occupy enjoyment in All of the latest and premier Java applied sciences from both the cyber web and Java applications that are always dispensed as JAR information. it's allotted as binary archives that can exist deployed on any sixty four-bit or 32-bit GNU/Linux distribution.

in addition to the routine binary information, Oracle additionally provides Linux clients with binary packages for All RPM-based Linux distributions, including red Hat enterprise Linux, Fedora, openSUSE and OpenMandriva.

Supported on a lot of working systems

The JRE (Java Runtime environment) and JDK (Java pile package) systems are platform-unbiased and preempt with many open source and industrial operating systems, reminiscent of Linux, BSD, Solaris, Microsoft home windows and Mac OS X, assisting the 64-bit, 32-bit and SPARC architectures.

while the Java Runtime ambiance platform is used handiest for enjoying affluent internet content material and Java courses, the Java construction materiel platform helps Java builders to create modern content for web sites or function-wealthy functions that travail on distinctive platforms.

Java construction package incorporates Java Runtime atmosphere

it is additionally essential to understand that JDK (Java development package) incorporates the JRE (Java Runtime atmosphere) platform, so you don’t believe to down load them one by one in case your leading purpose is to help in Java.

Java Runtime ambiance Java gauge edition Oracle Java Oracle Java JRE SE


Oracle: Java EE wants an Open source groundwork | killexams.com existent Questions and Pass4sure dumps

information

Oracle: Java EE needs an Open source basis
  • through John okay. Waters
  • 08/17/2017
  • With Java EE 8 poised to fade GA, and JavaOne 2017 simply across the corner, Oracle Corp. says the time is preempt to "rethink" how Java EE is developed, and it's since the abilities benefits of relocating the platform and associated applied sciences to an open supply foundation "to originate it greater agile and attentive to altering trade and expertise calls for."

    The Redwood Shores, Calif.-primarily based steward of Java set aside ahead that concept today on The Aquarium weblog.

    "We disagree with that poignant Java EE technologies to an open supply foundation may exist the birthright next step, to exist able to adopt greater agile procedures, implement greater bendy licensing, and change the governance method," wrote Oracle software evangelist David Delabassee. "We arrangement on exploring this possibility with the neighborhood, their licensees and a number of candidate foundations to view if they can flood Java EE forward during this direction."

    The roster of applied sciences that topple under the Java Platform commercial enterprise edition umbrella presently comprises both open and proprietary tech. The TCKs (test compatibility kits), as an instance, that are used to validate and prove an implementation of the spec is compliant, are proprietary. And Java EE is licensed beneath an Oracle industrial license.

    Mike Lehman, VP of product management at Oracle, also pointed to the notoriously byzantine Java Specification Participation settlement (JSPA), which former Chair of the Java neighborhood method (JCP) Patrick Curran once known as "massive and frightening," as fraction of the Java EE development manner that may exist dramatically more advantageous by this sort of move.

    "The technique itself in the JCP is idiosyncratic to the Java community and discipline to licensing suggestions and legal phrases that are sometimes now not considered as permissive and straightforward as different foundations," Lehman pointed out in an e mail, "like Apache or Eclipse…"

    Lehman allowed that what Oracle is suggesting is not as a noteworthy deal about open sourcing Java EE as it is "opening up and updating the system linked to Java EE to exist compatible with the centered open supply basis process."

    in the Aquarium submit, Delabassee emphasised that, while Oracle is exploring this thought, it intends "to fulfill its ongoing commitments to builders, wait users, shoppers, technology buyers, expertise contributors, companions, and licensees."

    "And they will aid existing Java EE implementations and future implementations of Java EE eight," he wrote. "we can proceed to participate sooner or later evolution of Java EE technologies. but they account a more open system, that isn't based on a unique supplier as platform lead, will encourage more desirable participation and innovation, and should exist in most useful hobbies of the neighborhood."

    at the least one main vendor believes Oracle is on the preempt music. "We account that inserting Java EE below the jurisdiction of an open source solid is a really fine movement so as to improvement the complete enterprise Java community," said John Clingan, senior precept product supervisor at crimson Hat, in an email. "while there's lots of factor to flesh out, pink Hat is positive and applauds Oracle's conclusion to strengthen Java EE below an open and collaborative neighborhood."

    red Hat is a member of the JCP and leads the CDI and Bean Validation Java EE-linked JSRs. The industry is a Java EE licensee, and its JBoss enterprise application Platform is wholly Java EE-compatible.

    an extra JCP member, Reza Rahman, a longtime commercial enterprise Java evangelist and founding member of the Java EE Guardians, also favored the theory.

    "this is terrific information," Rahman told ADTMag, "and a very long time coming."

    Rahman and the Guardians started making the case that Oracle has been "conspicuously neglecting" Java EE for the judgement that the community become based remaining year.

    "I account it remains genuine that Oracle undervalues Java EE," he said. "I don't account the enterprise is chummy with Java EE and what it will probably enact for it the way, as an example, Microsoft understands the price of .web. this is in fact a huge triumph for many of us within the neighborhood. Now the ball is in their courtroom, and the onus is upon us to profit from it."

    Oracle wants remarks on this suggested current course for Java EE development, and the company is featuring a spot to weigh in by way of e mail: comments@javaee.companies.io.

    in regards to the creator

    John has been overlaying the high-tech beat from Silicon Valley and the San Francisco Bay enviornment for almost two decades. He serves as Editor-at-tremendous for software development traits (www.ADTMag.com) and contributes regularly to Redmond journal, The expertise Horizons in education Journal, and Campus know-how. he is the writer of greater than a dozen books, including The every itsy-bitsy thing book to companionable Media; The everything computing device e-book; Blobitecture: Waveform architecture and Digital Design; John Chambers and the Cisco approach; and Diablo: The genuine strategy guide.


    Mythbusters: 5 Myths About How Java Is Getting stronger | killexams.com existent Questions and Pass4sure dumps

    Java became originally designed for interactive tv, however it turned into too superior of technology for the cable television trade at the time. The legacy of Java begins with a team known as green group, who initiated this mission to augment a language for digital instruments, equivalent to set-excellent containers, televisions, and so on. besides the fact that children, it changed into acceptable for information superhighway programming. Later, Java turned into incorporated with the aid of Netscape.

    The leading factors for growing Java believe been fundamental: they essential a language that was effective, portable, platform-independent, comfortable, excessive-efficiency, multithreaded, structure-impartial, object-oriented, interpreted, and dynamic.

    during this quick, aggressive world the place Java programming construction has reached the subsequent level, Java has developed over the years. With the emergence of AI and ML, Java has shifted its hub of attention against safety, restful transactions, and becoming an genuine instrument for commercial enterprise networks.

    Is Java altering?

    There are loads of things alterations to the Java ecosystem within the eventual 12 months. The stewarding of Oracle has delivered enhancements concentrated on ongoing platform completeness, and heed Reinhold’s keynote at Oracle Code One made it lucid that Java remains open and free.

    Oracle’s chief architect of the Java platform, heed Reinhold, reassured the trustworthy that Java is better than ever, with an energetic neighborhood and full parity between commercial and open-source JDKs (Java construction Kits). heed Reinhold mentioned, "Don’t exist concerned — Java is soundless free."

    A note to Java from Matthew McCullough, vp of container features, proves that the maxim “when web groups grow up, they develop into Java stores,” Reinhold took to the stage for a demo of its current features.

    Three largest adjustments of the 12 months

    Reinhold stated that we're splitting the 23-12 months-historical platform into 26 gauge modules. To advocate builders flood their platform faster in areas that are vital to Java builders, Corba and Java enterprise version (EE) modules that had been a fraction of the Java habitual version believe been removed. finally, Reinhold breaks his silence and explains how the alternative of the multi-12 months unlock model with a swift six-month cadence introduced ultimate yr benefits Java builders.

    If participation is a measure of health, then JDK 11 is prospering. Reinhold stated, “JDK eleven has had probably the most outdoor contributions of any unlock we’ve seen.”

    five Myths About Java

    Mark Reinhold addressed the exact five misconceptions (otherwise called fear, uncertainty, and doubt, or FUD) about the current Java free up model:

  • feature releases can exist disruptive for previous releases — no longer genuine. heed Reinhold said, "The rate of innovation has now not modified, the rate of innovation distribution is altering."
  • For removing an historical function, it believe to exist deprecated three years in enhance. “no longer genuine, for disposing of a deprecated function, it requires a construction-able build that considerations a suitable warning at both assemble time or runtime because a working construct, after all, is the optimal liberate method.”
  • Your usher will wait for any non-LTS unlock after six months and no more than three years for the LTS unlock. "it truly is not real; it depends upon what the non-Oracle members of the JDK neighborhood originate a conclusion to do. Oracle has a proven tune checklist and is already discussing how best to succor JDK 8 and JDK 11 for the lengthy haul.”
  • Non-lengthy-term-assist releases are just yet another identify for a beta. “No, the handiest unlikeness with an LTS liberate is that it has an extended assist timeline,” Reinhold noted, “you can soundless expend a non-LTS unlock in creation in case you like, but you’ll believe to supersede it in six months or locate somebody to assist it or aid it your self.”
  • in case you retain an rare migrated device, which you could ignore non-LTS releases, " Reinhold claims here is additionally not proper, claiming, "if you test with each role release, then you are able to migrate to the subsequent long-time epoch succor unlock.”
  • What enact you account about the current unlock cycle? let us know in the comments under!

    topics:

    java ,improve ,lts ,free up cycle ,java eight ,java 11 ,oracle ,myths ,bythbusting


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    JSR-338

    Most enterprise applications will exigency to deal with persistent data, and interaction with relational databases can exist a tedious and difficult endeavor. The Java Persistence API (JPA) specification aims to provide an kick view of backend storage in a transactionally-aware manner. By dealing with POJOs, JPA enables developers to effect CRUD operations without the exigency for manually tuning SQL.

    To activate JPA, a META-INF/persistence.xml file must exist present in the JAR or WAR in which persistence functionality is to exist used; however, a default data-source is now provided, simplifying testing and development.

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    @Entity @NamedStoredProcedureQuery(name="newestBlogsSP", procedureName="newestBlogs") public class Blog {...}

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    StoredProcedureQuery query = EntityManager.createNamedStoredProcedureQuery("newestBlogsSP"); query.registerStoredProcedureParameter(1, String.class, ParameterMode.INOUT); query.setParameter(1, "newest"); query.registerStoredProcedureParameter(2, Integer.class, ParameterMode.IN); query.setParameter(2, 10); query.execute(); String response = query.getOutputParameterValue(1);

    Bulk Update and Delete via the Query API

    CriteriaUpdate, CriteriaDelete, and CommonAbstractQuery interfaces believe been added to the API, and the AbstractQuery interface has been refactored.

    A spec specimen of a bulk update may perceive like:

    CriteriaUpdate<Customer> q = cb.createCriteriaUpdate(Customer.class); Root<Customer> c = q.from(Customer.class); q.set(c.get(Customer_.status), "outstanding") .where(cb.lt(c.get(Customer_.balance), 10000));

    Entity listeners using CDI

    Listeners on existing entity events @PrePersist, @PostPersist, @PreUpdate, and @PreRemove now advocate CDI injections, and entity listeners may themselves exist annotated with @PostConstruct and @PreDestroy.

    Synchronization of persistence contexts

    In JPA 2, the persistence context is synchronized with the underlying resource manager. Any updates made to the persistence context are propagated to the resource manager. JPA 2.1 introduces the concept of unsynchronized persistence context. Here is how you can create a container-managed unsynchronized persistence context:

    @PersistenceContext(synchronization=SynchronizationType.UNSYNCHRONIZED) EntityManager em;

    Java Community Process approves Java EE 6 | killexams.com existent questions and Pass4sure dumps

    Java Community Process approves Java EE 6

    New version of Java Enterprise Edition adds advocate for function-based profiles, and more

  • By John K. Waters
  • Dec 11, 2009
  • The Java Enterprise Edition specification (Java EE 6) has been approved by the Java Community Process (JCP). The final release is now  available .

    The Java EE 6 specification comprises about 30 additional specs and is a continuation of many of the approaches and ideas of its predecessor, Java EE 5. However, this version emphasizes a development model driven by metadata. It also adds more extensibility points and service-provider interfaces to allow other technologies to plug into the platform implementations, essentially making life easier for Java EE developers. 

    Among the most talked about capabilities in Java EE 6 is its advocate for function-based profiles. Profiles provide a way for users to define a subset of the Java EE specification and soundless achieve certification, said Gartner analyst Massimo Pezzini.

    "In Java EE 5 and previous versions, in order to achieve certification, you had to implement the full set of Java EE APIs," Pezzini said. "And there are a ton of those. This is the judgement there aren't that many products that are Java EE-certified. Basically, it's only the gigantic vendors -- JBoss, Oracle WebLogic, IBM WebSphere -- who can really afford to set aside together a Java EE-compliant product]. But with profiles, you can define a subset of the Java EE APIs and achieve certification only for that particular subset."

    The first Java EE 6 profile has been defined by the JCP expert group and is included in this release. Dubbed the Web Profile, it's a subset of the full Java EE spec aimed at Web application developers. The JCP describes it as "a more gentle introduction to the Java EE platform" that provides only those technologies needed by most Web application developers, "without the enterprise technologies that sometimes muddle such developers."

    In other words, it's the technology typically used to build a Web application, Pezzini said. "The expectation is that a entire bunch of products that can't today achieve Java EE certification, because they don't implement the more sophisticated features, will exist able to achieve a plane of certification," he said. "They started with the Web Profile because it's the most popular."

    Rod Johnson, founder of VMware subsidiary SpringSource and member of the JCP Executive Committee, is less impressed. "Profiles in concept are the most significant current feature," he said, "but in exercise they didn't eddy out the way they had hoped. When the Java EE 6 goals were originally set out, they were very enthusiastic about the fact that profiles would originate the platform a lot more modular and aligned with what people were actually doing in the existent world. The wait result is that the ground profile tended not only to exist a lot bigger than they would believe liked, but also continued the trend of the past, where a current specification ends up putting out current technologies that are unproven."

    Johnson is more enthusiastic about the Java Persistence API 2.0 (JPA), the Java API for the management of persistence and object-relational mapping for Java EE and Java SE environments. He's also a fan of a current feature that defines a meta-data model and API for JavaBean validation.

    The Java EE 6 spec also applies the profiles concept to Enterprise JavaBeans 3.1 specification with EJB Lite, a smaller subset of the EJB API. It includes such features as transactions and security, but leaves out features such as messaging, remote access and scheduling.

    "The thinking here is that EJB Lite will originate EJB a itsy-bitsy bit more Popular in the developer community, which has been hesitant to adopt the technology because of its complexity," Pezzini said.

    The Java EE 6 spec was launched in 2007 as Java Specification Request (JSR) 313, then re-launched as JSR-316. (JSRs are the formal documents that portray proposed additions and changes to the Java platform.) The original arrangement was to complete the spec in 2008, but the first Public Review Ballot wasn't reached until earlier this year.

    Other Java EE component JSRs were approved along with the Java EE 6 spec, including Servlet 3.0, JPA 2.0, EJB 3.1, Connector 1.6 and CDI 1.0. The Managed Beans 1.0 specification was also approved.

    About the Author

    John K. Waters is a freelance writer based in Silicon Valley.


    Java Feature — Using the Java Persistence API (JPA) with Spring 2.0 | killexams.com existent questions and Pass4sure dumps

    The EJB 3.0 Java Persistence API (JPA) was released in May 2006 as fraction of the Java Enterprise Edition 5 (Java EE) platform, and it has already garnered a noteworthy deal of attention and praise. What began as merely an easier-to-use successor to the much-maligned container-managed persistence (CMP) portion of the EJB component gauge soon evolved into a full-blown incorporation of the existing best practices of the most prominent and Popular object-relational (O-R) persistence products in use. The result is that applications now believe a modern gauge for lightweight enterprise Java persistence that they can expend in any compliant Java EE 5 application server, or in Java gauge Edition (SE) applications.

    The Spring application framework has been in actuality for four years, and it has become a Popular option both in an application server context and standalone. dote JPA, Spring is a technology designed to allow applications to exist built from POJOs. The Spring Framework runs within whatever runtime context an application requires, and it supports applications by providing a wide ambit of services. Some of these services are abstractions over existing container-level services, whereas others add value to the Java EE container. The persistence access layer, which is particularly Popular with the Spring community, is nicely integrated with whatever persistence runtime is being used and facilitates a sound testable architectural approach to working with persistent objects. Spring 1.x included advocate for a variety of open source and commercial persistence implementations such as TopLink, Hibernate, iBATIS, and JDO, as well as the gauge Java database connectivity (JDBC) API that's fraction of the Java runtime. Spring 2.0 was a major milestone and introduced additional integrated advocate for JPA. In this article we'll debate how to expend Spring and JPA together and highlight some of the benefits that this architecture can bring to an application.

    Spring as a JPA ContainerThe Java Persistence API was architected so it could exist used both inside and outside a Java EE 5 container. When there's no container to manage JPA entity managers and transactions, the application must abide more of the management burden. When running in a JPA container the user suffer is more hospitable.

    One goal of the JPA specification was to originate the technology pluggable. To enable this, the roles of container provider (the container or the side that has control of the runtime threads and transactions), and persistence provider (the provider or the fraction that implements the persistence API and manages the persistent entities) were defined, and a service provider interface (SPI) binds the two at deployment and runtime. A compliant JPA host container correctly implements this SPI from the container perspective. A compliant JPA persistence provider implements the SPI from the provider perspective. If both sides supervene the rules, a compliant container should exist able to elope any compliant persistence provider implementation, and similarly, a provider should plug into any container.

    Although Spring is neither an application server nor a Java EE 5 container, it does enhance, augment, and sometimes implement many of the services used in application servers. Spring 2.0 implements the container portion of the JPA SPI so it can exist viewed as a JPA container. As such, it provides the class-loading and weaving advocate that JPA providers expend to succor manage the entities at runtime. Users profit from an environment in which the runtime container and the JPA persistence provider are tightly integrated, but not necessarily in a Java EE 5 context. This provides many of the benefits of Java EE persistence without requiring a Java EE container.

    Defining EntitiesThe most basic fraction of using JPA is to design and create the entities to exist persisted. For the purposes of this article, they will expend an extremely simplified library book inventory system with a unique entity to illustrate the concepts concretely in Java code.

    We'll create a simple book entity by defining the class and annotating it with an @Entity annotation. The table that stores book instances will default to BOOK, which is exactly what they want. The primary key identifier is the isbn field, so they annotate that realm with @Id. Because the title and author fields are basic mappings from the kick fields to columns of the selfsame title in the database table, they don't believe to enact anything to them. They want the genre realm to map to a database column named CATEGORY, so they give it a @Column annotation. The resulting book entity class is shown below.

    package org.bookguru;

    import javax.persistence.*;@Entitypublic class book {

        @Id private int isbn;

        private String title;

        private String author;

        @Column(name="CATEGORY")    private Genre genre;

        // Constructors, getters and setters, etc.}

    Of course a existent application would believe many entities, but because they want to focus on the expend of JPA in Spring, they won't elaborate how to define and map JPA entities. For more information on defining JPA entities view Pro EJB 3: Java Persistence API.

    Using JPA Entities in SpringThe primary way to operate on entities is by using an entity manager. The EntityManager API is the main gateway into JPA and supports basic create/read/update/delete (CRUD) operations. It acts as both a manager of All loaded entities and a factory for queries that enable more entities to exist loaded. An entity manager is analogous to an Oracle TopLink session, Hibernate session or an equivalent interface provided by many O-R mapping frameworks.

    For example, to create a current persistent entity they would simply create a current Java kick of the rectify entity type, invoke the persist() method on the entity manager, and pass the current entity as a parameter. Assuming they believe access to an entity manager, the code to create a current book is simple.

        book book = current Book(12769356, "War and Peace", "Leo Tolstoy", Genre.FICTION);    entityManager.persist(book);

    Using JPA and the entity manager in Spring is very simple. In most cases it's simply a matter of annotating a realm or method of a Spring bean with @PersistenceContext, which causes an entity manager to exist injected. Then invoke the entity manager in the context of a container transaction. Note that @PersistenceContext is a gauge JPA annotation and not specific to Spring.



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