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310-540 Enterprise development with iPlanet Application Server 6.0

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310-540 exam Dumps Source : Enterprise development with iPlanet Application Server 6.0

Test Code : 310-540
Test designation : Enterprise development with iPlanet Application Server 6.0
Vendor designation : SUN
: 152 actual Questions

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SUN Enterprise development with iPlanet

Pulling plug on trade Florida undermines state’s competitiveness | feeling | actual Questions and Pass4sure dumps

Florida has been blessed over the past half-century with explosive augment and chance. but because the world grows smaller, they should seize opportunities to diversify their economic climate and beget confident tomorrow’s opportunities.

In contemporary years, the Florida Legislature has debated what position the condition may quiet play in economic construction. For me, there is not any debate.

Our economy has traditionally been carried via tourism, building and agriculture. These are captious foundations that they purpose to retain potent for generations to return.


Amy Beth Bennett / sun Sentinel

Kelly Smallridge

Kelly Smallridge (Amy Beth Bennett / sun Sentinel)

but when they intend to weather economic storms, and residence ourselves for the changing dynamics of a global economic climate, they ought to exist intentional about putting know-how and rising industries to work for us. They must recruit new agencies and develop their latest ones, or risk dropping this powerful basis they tolerate enjoyed for so lengthy.

Funding for commercial enterprise Florida, the state’s public-inner most partnership dedicated to economic construction, is vulnerable to being defunded via legislators. i hope they snitch a second peep at this resolution and weigh the consequences of taking Florida’s foot off the gasoline pedal after they want a diverse economic system most. That potential every puny thing from matching small companies with international markets to recruiting job creators into every materials of Florida so that their children will not tolerate to leave home to discover work. It besides means assisting market communities devastated by means of hurricanes and natural mess ups when local economies want it most, and guaranteeing their 20 defense obligate installations tolerate the elements they exigency to remain in Florida.

business Florida is the obligate multiplier and point of team spirit for the a hundred and fifty partners of the Florida economic development Council. without enterprise Florida, their counties would exist left to compete with other states on my own, and with conflicting aims. there is without vicissitude no comparable difficult to bring the unified messaging and lead of every of Florida’s 67 counties than commercial enterprise Florida.

we tolerate a new governor with a daring vision for turning the corner on extended capital investment, high-wage job advent, and advanced manufacturing. Governor Ron DeSantis needs every of the tools they can give him to accumulate the job achieved. What a shame it will exist to undermine the momentum he's building and forego opportunities for a brighter future.

i hearten the Florida Legislature to assist Governor DeSantis, fund enterprise Florida and route a message that they price respectable-paying job creators.

Kelly Smallridge is the Chair-pick for the Florida economic development Council and President and CEO of the trade building Board of Palm beach County.

foreign statistics publish Brings Snail Mail to the internet Age with iPlanet | actual Questions and Pass4sure dumps

This chapter is from the reserve 

IDP hosts the servers and handles the transactions that stagger via net ePOST. The platform infrastructure reflects a multitier structure: internet server, application server, database server, and directory server. There are industrial-electricity printing servers linked to the infrastructure, as well. corporations besides tolerate the option of hosting the application in their personal IT infrastructures. bodily, every these servers can rush anywhere~even inner a corporation's firewalls.

To internet-enable IDP's ePOST software, IDP and solar expert capabilities utilized three distinct EJBs~administration-service bean, consumer-service bean, and hybrid-mail carrier bean. each and every of these EJBs is a stateless session bean working on iPlanet application Server, which is in response to the EJB specifications. the utilize of stateless session beans provides IDP with unreasonable scalability, on the grounds that a person's request will besides exist accomplished in any utility server manner in such a replicated system. Two subsequent requests from the identical user can exist accomplished in two diverse processes on two different hosts. So if the internet ePOST licensee has built-in the concede perquisite into a clustered ambiance, the software server always directs requests to the least-loaded host. "With stateless session beans," notes Hansen, "our purchasers can accommodate as many hosts as they want, devoid of affecting user response time." The initial creation hardware contains any variety of sun enterprise 450 servers running Solaris 7 (the variety of servers is dictated by means of the internet ePOST licensee).

using iPlanet utility Server and iPlanet net Server changed into informed through solar skilled capabilities—a counsel IDP failed to snitch frivolously. iPlanet software Server is a J2EE expertise–compatible e-commerce platform that extends the reliability and portability of the J2EE environment via its failover capacity, container-managed persistence, and transaction monitoring. iPlanet internet Server facets a high-efficiency Java utility platform that supports Java Servlet extensions, JSPs, and in-process, plugable Java digital machines. "We're glad with this suggestion because collectively, these iPlanet solutions give a respectable spine to assist their J2EE expertise–based answer. As they develop their client base, and in flip the transaction volume, we're assured they tolerate a platform that allows you to support pace with us," notes Johnsen.

each EJB handles requests from one of the most a variety of styles of consumers: hybrid-mail administration, customer administration and postal workplace administration. The EJBs license the request from the customer, based on the consumer identification and password acquired every through log in. They then study and write to the database. The hybrid-mail EJB besides communicates with the bank card verification and charge server supplied through the web ePOST licensee.

The GUIs for the customer administration, postal office administration, operator and support desk are supplied through HTML pages generated through JSPs. Of direction, these pages reside on the software server, along with servlets and EJBs. JSP pages consist above every of varieties and tables stuffed with facts from the database. every of net ePOST's 111 JSP pages offers entertaining performance.

  • The postal administrator can view and adjust client facts, in addition to register new valued clientele.

  • The operator can view logs and update application-server configurations, and the aid desk can view client information. The operator and aid desk don't appear to exist included in the Java applet; they're services purchasable via HTML pages for utilize by using the postal difficult or different IDP client.

  • The client administrator can view and modify opt for statistics in regards to the company, and can additionally add new users from the equal company.

  • in terms of tiers, net ePOST's underpinnings were dispensed along here lines as proven in determine 10.2:

    determine 10.2 IDP application structure

  • client tier: Java applet and internet browser operating from a laptop. The Java applet presents the graphical person interface, integrates with address databases, calculates shipping costs, and lets clients route HML data with embedded postscript.

  • web tier: a client laptop running Netscape, Microsoft information superhighway Explorer, or a further web browser downloads the Java applet. iPlanet net server additionally resides on this tier. Firewalls and SSL encryption provide protection.

  • business-common sense tier: Java Servlets and JSPs operating on iPlanet software Server powered by two sun commercial enterprise 450 servers. Java Servlets role previews, support HML documents on the file gadget, and find stateless session EJBs the utilize of Java endemic directory Interface (JNDI). JSPs consist notably of generated HTML kinds and tables with data read from the database the usage of DAO, enabling postal operators to update utility-server configurations.

  • EJBs, JDBC, and a Postscript parser/JPEG renderer, to parse Postscript info and render them as JPEG pictures, rush on sun commercial enterprise 450 servers. EJBs license requests from the client, read/write to the database by means of DAO, and discourse with the bank card verification and price server. JDBC 2.0–compliant Oracle OCI drivers are used to retrieve information kept in Oracle8i for the asking for EJB element.

  • Database tier: When iPlanet utility Server receives an HML letter, a process is initiated that takes the HML doc and places it in a listing on Oracle's server, a solar trade 450. EJBs attach a record in a distinct table, known as hybrid-mail transact, and additionally trigger charge capabilities. A UNIX-based mostly procedure then goes into the transact desk to assess for brand new print jobs, in addition to for timestamps. If jobs exist, the technique sends a muster out that triggers the printing manner. besides animated on the database tier is JAD'okay, the bank card authorization software that IDP used when trying out internet ePOST.

  • solar to bundle iPlanet server with Solaris | actual Questions and Pass4sure dumps

    solar Microsystems plans to bundle its iPlanet software Server with its flagship Solaris working gadget, which could carry the trade into fight with at least considered one of its industry companions.

    solar has launched an update to Solaris that blanketed a development edition of the utility server, to give a boost to ties between the two items. The company plans to raise the stage of integration enormously next year, via bundling a replete edition of iPlanet with Solaris.

    sun officers observed the company is debating whether to can charge a price for the bundled product.

    application servers are a kindhearted of middleware that sit down between a database and an conclusion-person, proposing a platform on which to set up a big latitude of trade applications, equivalent to e-commerce and commercial enterprise resource.

    If solar bundles the software server with its regularly occurring operating gadget it might assist the trade profit market participate in a fiercely competitive market. The purposes server market is led by route of BEA systems, followed by route of IBM and then sun, in line with contemporary figures from IDC.

    The stream might spark fight between sun and BEA. in addition to being opponents, both are besides shut partners, with BEA's application server being most generally deployed on solar servers.

    A BEA spokesman talked about the company would proceed to work intently with sun, but argued that bundling the iPlanet utility Server with Solaris free of charge can exist a mistake.

    "What's in it for solar?" spoke of John Kiger, BEA's director of product marketing. "There could exist no additional income and lots of further costs."

    software servers are complicated and require huge building charges, Kiger delivered. He argued that it will or not it's tricky for a company to hold its software server with out producing profits to assist its development, which within the long rush could damage sun's shoppers.

    sun officers declined to handle upon even if the trade became planning to encompass the application server in an update to Solaris 8 or with Solaris 9 when it's launched in the middle of next 12 months.

    For Solaris users, the tighter integration would beget it less complicated to set up and maneuver solar's software server with its working device, spoke of Anil Gadre, vice-president and gauge manager for Solaris.

    sun should odds by using leveraging the recognition of Solaris to augment the variety of users for the iPlanet server, he delivered.

    The company has placed the application from iPlanet E-Commerce solutions - shaped via an alliance with AOL Time Warner - as a key factor in its solar Open net environment (ONE) initiative, which aims to supply businesses with hardware and utility for setting up web functions.

    At a solar software conference in San Francisco this week, president and chief operating officer Ed Zander said the trade planned to snitch wield of iPlanet's items, partly in order that they may exist built-in more tightly with solar's choices.

    further informationSun: www.sun.comBEA programs:

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    Enterprise development with iPlanet Application Server 6.0

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    iPlanet to bundle app, Web servers with Solaris | actual questions and Pass4sure dumps

    iPlanet E-commerce Solutions anticipates embedding its Web and application server technologies with the Sun Microsystems Solaris operating system and may seek similar deals with Hewlett-Packard and IBM regarding their Unix OSes as well, an iPlanet official said on Tuesday.

    Such an arrangement with Solaris is inevitable, according to Patrick Dorsey, group marketing manager at iPlanet, in Palo Alto, Calif. He said he could not provide a date on when such a bundling arrangement might occur.

    "I umpire the writing's on the wall that that character of integration is going to happen," Dorsey said.

    "Companies buying Solaris are looking for an application server on top of Solaris," Dorsey said. "The trend is clear." iPlanet is a jointly owned venture of Sun and America Online.

    "As iPlanet, they continue to exist multiplatform, so we're looking for opportunities to finish [similar bundlings] with IBM AIX and HP HP-UX as well," Dorsey said.

    Such a bundling would save users from having to purchase the products separately and integrate them for applications such as e-commerce. Microsoft already bundles Web and application server products with its Windows operating platform, noted Dorsey and Joshua Walker, an analyst at Forrester Research in Cambridge, Mass.

    A developer license for iPlanet Application Server Enterprise Edition 6.0 already ships with Solaris, as does a developer license of iPlanet's Web Server 4.1 Enterprise Edition, Dorsey said. The integration of the servers themselves represents a next step.

    Customers will capitalize from tighter integration and easier administration, management, and development tasks, Dorsey said.

    "I umpire it's something the customers are demanding and the industry is pitiful toward," Dorsey said.

    This story, "iPlanet to bundle app, Web servers with Solaris" was originally published by InfoWorld.

    iPlanet, Netscape Enterprise Servers at Risk | actual questions and Pass4sure dumps

    A vulnerability has been detected in the Web Publisher feature in the iPlanet Enterprise Web Server and Netscape Enterprise Server products that exposes servers to beastly obligate attacks.

    To guard against beastly obligate attacks, users must disable Web Publisher and Directory Indexing on external servers.

    In an alertissued Friday, the CERT Coordination focus warned that the vulnerabilities could allow attackers to beget repeated authentication attempts if a server is configured to utilize HTTP basic authentication.

    While the risk is not greater than any other beastly obligate assail using HTTP basic authentication, this vulnerability may represent an unexpected avenue of attack, the focus warned.

    The bug, which was detected by ProCheckup, affects the iPlanet Web Server, Enterprise Edition and Netscape Enterprise Server running on Windows NT-based operating systems.

    The security outfit found the Web Publisher feature in those servers contains the wp-force-auth command that initiates an HTTP Basic Authentication dialog. "An attacker may beget repeated calls to wp-force-auth in an attempt to guess convincing user credentials. Well-known user credentials, such as Administrator or Guest on Windows systems, or root or nobody on Unix/Linux systems, may exist subjected to brute-force attacks," it added.

    While the exposure created by the bug is no greater than that of any other beastly obligate attack, this vulnerability may represent an "unexpected avenue of attack," CERT warned.

    Users of the vulnerable iPlanet server are urged to disable Web Publisher and Directory Indexing on external servers. Or, additionally, a Netscape Server Application Programming Interface (NSAPI) can exist used to filter HTTP traffic to detect and shroud HTTP requests containing the ?wp-force-auth command.

    It's not the first time bugs tolerate been detected in Sun's iPlanet server product. eventual month, Sun issued service packs to fix bugs in the search role of its iPlanet Web server.

    The buffer overrun vulnerabilit ies, which detected by Next Generation Security Software (NGSS), affected versions 4.1 and 6.0 of iPlanet. That flaw allowed remote attackers to rush arbitrary code if the search role within the Server is enabled. It was described as a high-risk bug.

    Plug recollection leaks in enterprise Java applications | actual questions and Pass4sure dumps

    The Java automatic garbage collection process typically operates as a low-priority thread that constantly searches recollection for unreachable objects, objects not referenced by any other demur reachable by a live thread. Different JVMs utilize different algorithms to determine how to collect garbage most efficiently.

    In the JVM, recollection is allocated in two regions:

  • Stack: Where local variables (declared in methods and constructors) are allocated. Local variables are allocated when a fashion is invoked and de-allocated when the fashion is exited.
  • Heap: Where every objects created with the new keyword are allocated. Since local variables are few in number, only primitive types and references, usually the stack will not overflow, except in cases of unusually abysmal or infinite recursion. The JVM throws a Java out-of-memory mistake if it is not able to accumulate more recollection in the mound to confiscate more Java objects. The JVM cannot confiscate more objects if the mound is replete of live objects and unable to expand further.
  • Causes of recollection leaks in Java

    The four typical causes of recollection leaks in a Java program are:

  • Unknown or unwanted demur references: These objects are no longer needed, but the garbage collector can not reclaim the recollection because another demur quiet refers to it.
  • Long-living (static) objects: These objects sojourn in the recollection for the application's replete lifetime. Objects tagged to the session may besides tolerate the very lifetime as the session, which is created per user and remains until the user logs out of the application.
  • Failure to cleanly up or free endemic system resources: endemic system resources are resources allocated by a role external to Java, typically endemic code written in C or C++. Java endemic Interface (JNI) APIs are used to embed endemic libraries/code into Java code.
  • Bugs in the JDK or third-party libraries: Bugs in various versions of the JDK or in the Abstract Window Toolkit and vibrate packages can occasions recollection leaks.
  • Detection of recollection leaks

    Some approaches to detecting recollection leaks supervene in the list below:

  • Use the operating system process monitor, which tells how much recollection a process is using. On Microsoft Windows, the job manager can demonstrate recollection usage when a Java program is running. This mechanism gives a coarse-grained understanding of a process's total recollection utilization.
  • Use the totalMemory() and freeMemory() methods in the Java runtime class, which shows how much total mound recollection is being controlled by the JVM, along with how much is not in utilize at a particular time. This mechanism can provide the heap's recollection utilization. However, details of the mound utilization indicating the objects in the mound are not shown.
  • Use memory-profiling tools, e.g., JProbe recollection Debugger. These tools can provide a runtime picture of the mound and its utilization. However, they can exist used only during development, not deployment, as they late application performance considerably.
  • Causes of recollection leaks in enterprise Java applications

    In the subsequent sections, I resolve some causes of recollection leaks in enterprise Java applications using a sample application and a recollection profiling tool. I besides imply strategies for detecting and plugging such leaks in your own projects.

    ResultSet and Statement Objects

    The Statement and ResultSet interfaces are used with Java Database Connectivity (JDBC) APIs. Statement/PreparedStatment objects are used for executing a SQL Statement; ResultSet objects are used for storing SQL queries' results.

    A Java Enterprise Edition (Java EE) application usually connects to the database by either making a direct connection to the database using JDBC thin drivers provided by the database vendor or creating a pool of database connections within the Java EE container using the JDBC drivers. If the application directly connects to the database, then on calling the close() fashion on the connection object, the database connection closes and the associated Statement and ResultSet objects nigh and are garbage collected. If a connection pool is used, a request to the database is made using one of the existing connections in the pool. In this case, on calling close() on the connection object, the database connection returns to the pool. So merely closing the connection does not automatically nigh the ResultSet and Statement objects. As a result, ResultSet and Statement will not become eligible for garbage collection, as they continue to remain tagged with the database connection in the connection pool.

    To investigate the recollection leak caused by not closing Statement and ResultSet objects while using a connection pool, I used a sample Java EE application that queries a database table and displays the results in a JSP (JavaServer Pages) page. It besides allows you to save records to the database table. The application is deployed in iPlanet App Server 6.0. I used JProbe to resolve the recollection utilization by the application.

    The sample application uses a database table with the following structure:


    First, I executed the application with the Statement and ResultSet objects closed. Subsequently, I executed the application by not closing the Statement and ResultSet objects. I did a query operation 50 times and observed the recollection usage pattern.

    Scenario 1

    The database table contains 100 rows and 10 columns. ResultSet and Statement objects are closed. The database connection is made using a connection pool. The recollection usage results of this scenario are shown in figure 1.

    Figure 1. When queried once, the mound recollection usage increases by 166.308 KB. Click on thumbnail to view full-sized image.

    Figure 1 is a mound usage chart provided by JProbe. It gives a runtime summary of the mound recollection in utilize over time as the Java EE application runs. The green district indicates the mound usage. The vertical line indicates a mound usage checkpoint has been set at that time. After setting the checkpoint, the query occurs and the mound recollection usage shoots up as objects are created. Once the operation completes, the objects no longer referenced will exist garbage collected by the JVM, so the recollection usage decreases. Ideally at this time, every new objects should exist released and garbage collected, and the mound usage should revert to the value before the checkpoint was set. In this case, some new objects continue to occupy recollection space, reflecting an augment in mound usage by 166.308 KB.

    When queried 10 times, the mound recollection usage increases by 175.512 KB, as illustrated in figure 2.

    Figure 2. Ten queries. Click on thumbnail to view full-sized image.

    When queried 50 times, the mound recollection usage increases by 194.128 KB, as shown in figure 3.

    Figure 3. Fifty queries. Click on thumbnail to view full-sized image.

    The observed augment in recollection was traced to the connection objects stored in the pool for subsequent reuse.

    Scenario 2

    The database table contains 100 rows and 10 columns. ResultSet and Statement objects are not closed. The database connection is made using a connection pool.

    When queried once, the mound recollection usage increases by 187.356 KB, as shown in figure 4.

    Figure 4. Results from one query. Click on thumbnail to view full-sized image.

    When queried 10 times, the mound recollection usage increases by 217.016 KB.

    Figure 5. Ten queries. Click on thumbnail to view full-sized image.

    When queried 50 times, the mound recollection usage increases by 425.404 KB

    Figure 6. Fifty queries. Click on thumbnail to view full-sized image.

    The contrast in recollection usage after 50 queries with open ResultSet and Statement objects is 231.276 KB. These results demonstrate that over time, these objects will occasions a huge recollection leak, thereby generating an OutOfMemoryError.

    In addition to the mound usage chart, JProbe besides provides a runtime view of class instances in the heap. From the class instance summary, they can identify the objects present in the mound at any point in time. figure 7 shows a portion of the class instance view of Scenario 2.

    Figure 7. Class instance summary. Click on thumbnail to view full-sized image.

    Figure 7 clearly shows that 50 objects of OracleStatement, 500 objects of DBColumn, etc., exist in the mound and are not garbage collected. JProbe provides a reference/referrer tree for each class instance in the table, shown in figure 8. From this tree they can identify how each class instance was created.

    Figure 8. Referrer tree for the DBColumn object

    From the referrer tree of DBColumn, they can perceive that it is created by the OracleStatement object. The class oracle.jdbc.driver.OracleStatement is the implementation for the Statement interface. So by closing the Statement object, every associated DBColumn objects will exist garbage collected.


    When using connection pools, and when calling close() on the connection object, the connection returns to the pool for reuse. It doesn't actually nigh the connection. Thus, the associated Statement and ResultSet objects remain in the memory. Hence, JDBC Statement and ResultSet objects must exist explicitly closed in a finally block.

    Collection objects

    A collection is an demur that organizes references to other objects. The collection itself has a long lifetime, but the elements in the collection finish not. Hence, a recollection leak will result if items are not removed from the collection when they are no longer needed.

    Java provides the Collection interface and implementation classes of this interface such as ArrayList and Vector. Using the very Java EE application tested in the previous scenario, I added the database query results to an ArrayList. When 35,000 rows were present in the database table, the application server threw a java.lang.OutOfMemoryError, with a default JVM mound size of 64 MB.

    Figure 9. mound summary when JVM throws java.lang.OutOfMemoryError. Click on thumbnail to view full-sized image.

    A collection with no policy for removing data causes a recollection leak, known as the Leak Collection anti-pattern (read J2EE Design Patterns, for more information on anti-patterns).


    When collections are used, the demur references stored in the collections should exist programmatically cleaned to ensure that the collection size does not grow indefinitely. If the collection is being used to store a big table's query results, data access should exist completed in batches.

    Static variables and classes

    In Java, usually a class member (variable or method) is accessed in conjunction with an demur of its class. In the case of static variables and methods, it is practicable to utilize a class member without creating an instance of its class. A class with static members is known as a static class. In such cases, before a class instance is created, an demur of its class will besides exist created by the JVM. The class demur is allocated to the mound itself. The primordial class loader will load the class object. In the case of static classes, every the static members will besides exist instantiated along with the class object. Once the variable is initialized with data (typically an object), the variable remains in recollection as long as the class that defines it stays in memory. If the primordial class loader loads class instances, they will sojourn in recollection for the duration of the program and are not eligible for garbage collection. So static classes and associated static variables will never exist garbage collected. Thus, using too many static variables leads to recollection leaks.


    Usage of static classes should exist minimized as they sojourn in recollection for the lifetime of the application.

    The Singleton pattern

    The Singleton pattern is an object-oriented design pattern used to ensure that a class has only one instance and provide a global point of access to that instance. The Singleton pattern can exist implemented by doing the following:

  • Implementing a static fashion that returns an instance of the class
  • Making the constructor private so a class instance can exist created only through the static method
  • Using a static variable to store the class instance
  • Example code for the Singleton pattern follows:

    public class Singleton { private static Singleton singleton=null; private singleton () { } public static Singleton getInstace() { if (singleton != null) singleton=new Singleton(); revert singleton; } }

    The Singleton class is typically used as a factory to create objects. I cached these objects into an ArrayList to enable their speedy retrieval. When a new demur must exist created, it will exist retrieved from the cache if it is present there, otherwise, a new demur will exist created.

    Figure 10. Singleton class diagram. Click on thumbnail to view full-sized image.

    Once the Singleton class is instantiated, it remains in recollection for the application's lifetime. The other objects will besides tolerate a live reference to it and, as a result, will never exist garbage collected.


    Avoid referencing objects from long-lasting objects. If such usage cannot exist avoided, utilize a frail reference, a character of demur reference that does not obviate the demur from being garbage collected.

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