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310-540 Enterprise evolution with iPlanet Application Server 6.0

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

Test Code : 310-540
Test title : Enterprise evolution with iPlanet Application Server 6.0
Vendor title : SUN
: 152 true Questions

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SUN Enterprise evolution with iPlanet

Pulling plug on traffic Florida undermines state’s competitiveness | persuasion | true Questions and Pass4sure dumps

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

In coincident years, the Florida Legislature has debated what position the state may still play in economic construction. For me, there is not any debate.

Our economy has traditionally been carried via tourism, pile and agriculture. These are critical 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 situation ourselves for the changing dynamics of a global economic climate, they ought to be intentional about putting know-how and rising industries to work for us. They must recruit unique agencies and develop their latest ones, or risk dropping this powerful basis they gain 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 seize a second search for 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 minute thing from matching small companies with international markets to recruiting job creators into complete materials of Florida so that their children will not gain to leave home to discover work. It also means assisting market communities devastated by means of hurricanes and natural mess ups when local economies want it most, and guaranteeing their 20 defense compel installations gain the elements they need to remain in Florida.

business Florida is the compel multiplier and point of team spirit for the a hundred and fifty partners of the Florida economic evolution Council. without enterprise Florida, their counties would be left to compete with other states on my own, and with conflicting aims. there is without difficulty no comparable firm to bring the unified messaging and usher of complete of Florida’s 67 counties than commercial enterprise Florida.

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

i embolden the Florida Legislature to assist Governor DeSantis, fund enterprise Florida and send a message that they cost respectable-paying job creators.

Kelly Smallridge is the Chair-pick for the Florida economic evolution Council and President and CEO of the traffic pile Board of Palm beach County.

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

This chapter is from the reserve 

IDP hosts the servers and handles the transactions that jog 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 also gain the option of hosting the application in their personal IT infrastructures. bodily, complete these servers can sprint 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 consume of stateless session beans provides IDP with unreasonable scalability, on the grounds that a person's request will also be accomplished in any utility server manner in such a replicated system. Two subsequent requests from the identical user can be accomplished in two diverse processes on two different hosts. So if the internet ePOST licensee has built-in the reply right 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 advice IDP failed to seize 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 cheerful 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 gain 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 accredit the request from the customer, based on the consumer identification and password acquired complete through log in. They then study and write to the database. The hybrid-mail EJB also communicates with the bank card verification and pervade 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 complete 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 unique valued clientele.

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

  • The client administrator can view and modify opt for statistics in regards to the company, and can additionally add unique 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 send 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 duty previews, support HML documents on the file gadget, and find stateless session EJBs the consume 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, sprint on sun commercial enterprise 450 servers. EJBs accredit requests from the client, read/write to the database by means of DAO, and speak with the bank card verification and cost 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 traffic 450. EJBs apportion a record in a inescapable table, known as hybrid-mail transact, and additionally trigger pervade capabilities. A UNIX-based mostly procedure then goes into the transact desk to assess for brand unique print jobs, in addition to for timestamps. If jobs exist, the technique sends a muster out that triggers the printing manner. also alive 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 | true Questions and Pass4sure dumps

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

    solar has launched an update to Solaris that blanketed a evolution 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 pervade a cost 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 large latitude of traffic 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 traffic profit market share in a fiercely competitive market. The purposes server market is led by way of BEA systems, followed by way of IBM and then sun, in line with coincident figures from IDC.

    The stream might spark affray between sun and BEA. in addition to being opponents, both are also 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 pervade can be a mistake.

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

    software servers are complicated and require huge pile 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 sprint could damage sun's shoppers.

    sun officers declined to touch upon even if the traffic 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 compose it less complicated to set up and maneuver solar's software server with its working device, spoke of Anil Gadre, vice-president and standard manager for Solaris.

    sun should edge by using leveraging the recognition of Solaris to multiply 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 traffic planned to seize handle of iPlanet's items, partly in order that they may be built-in more tightly with solar's choices.

    further informationSun: www.sun.comBEA programs:

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    Enterprise evolution with iPlanet Application Server 6.0

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    iPlanet to bundle app, Web servers with Solaris | true 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 quest 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 arbiter the writing's on the wall that that type 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 be multiplatform, so we're looking for opportunities to Do [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, renowned 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 profit from tighter integration and easier administration, management, and evolution tasks, Dorsey said.

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

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

    iPlanet, Netscape Enterprise Servers at Risk | true 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 brute compel attacks.

    To guard against brute compel 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 compose repeated authentication attempts if a server is configured to consume HTTP basic authentication.

    While the risk is not greater than any other brute compel bombard using HTTP basic authentication, this vulnerability may limn 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 create the Web Publisher feature in those servers contains the wp-force-auth command that initiates an HTTP Basic Authentication dialog. "An attacker may compose repeated calls to wp-force-auth in an attempt to guess valid user credentials. Well-known user credentials, such as Administrator or Guest on Windows systems, or root or nobody on Unix/Linux systems, may be subjected to brute-force attacks," it added.

    While the exposure created by the bug is no greater than that of any other brute compel attack, this vulnerability may limn 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 be used to filter HTTP traffic to detect and screen HTTP requests containing the ?wp-force-auth command.

    It's not the first time bugs gain been detected in Sun's iPlanet server product. ultimate month, Sun issued service packs to fix bugs in the search duty 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 sprint arbitrary code if the search duty within the Server is enabled. It was described as a high-risk bug.

    Plug reminiscence leaks in enterprise Java applications | true questions and Pass4sure dumps

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

    In the JVM, reminiscence is allocated in two regions:

  • Stack: Where local variables (declared in methods and constructors) are allocated. Local variables are allocated when a routine is invoked and de-allocated when the routine is exited.
  • Heap: Where complete objects created with the unique 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 deep or infinite recursion. The JVM throws a Java out-of-memory error if it is not able to score more reminiscence in the heap to earmark more Java objects. The JVM cannot earmark more objects if the heap is replete of live objects and unable to expand further.
  • Causes of reminiscence leaks in Java

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

  • Unknown or unwanted object references: These objects are no longer needed, but the garbage collector can not reclaim the reminiscence because another object still refers to it.
  • Long-living (static) objects: These objects stay in the reminiscence for the application's replete lifetime. Objects tagged to the session may also gain the identical lifetime as the session, which is created per user and remains until the user logs out of the application.
  • Failure to antiseptic up or free endemic system resources: endemic system resources are resources allocated by a duty 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 Swing packages can understanding reminiscence leaks.
  • Detection of reminiscence leaks

    Some approaches to detecting reminiscence leaks succeed in the list below:

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

    In the subsequent sections, I analyze some causes of reminiscence leaks in enterprise Java applications using a sample application and a reminiscence profiling tool. I also suggest 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() routine on the connection object, the database connection closes and the associated Statement and ResultSet objects close 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 close 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 reminiscence 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 also allows you to save records to the database table. The application is deployed in iPlanet App Server 6.0. I used JProbe to analyze the reminiscence 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 reminiscence 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 reminiscence usage results of this scenario are shown in design 1.

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

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

    When queried 10 times, the heap reminiscence usage increases by 175.512 KB, as illustrated in design 2.

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

    When queried 50 times, the heap reminiscence usage increases by 194.128 KB, as shown in design 3.

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

    The observed multiply in reminiscence 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 heap reminiscence usage increases by 187.356 KB, as shown in design 4.

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

    When queried 10 times, the heap reminiscence usage increases by 217.016 KB.

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

    When queried 50 times, the heap reminiscence usage increases by 425.404 KB

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

    The disagreement in reminiscence usage after 50 queries with open ResultSet and Statement objects is 231.276 KB. These results Show that over time, these objects will understanding a huge reminiscence leak, thereby generating an OutOfMemoryError.

    In addition to the heap usage chart, JProbe also provides a runtime view of class instances in the heap. From the class instance summary, they can identify the objects present in the heap at any point in time. design 7 shows a piece 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 heap and are not garbage collected. JProbe provides a reference/referrer tree for each class instance in the table, shown in design 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 see 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, complete associated DBColumn objects will be 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 close the connection. Thus, the associated Statement and ResultSet objects remain in the memory. Hence, JDBC Statement and ResultSet objects must be explicitly closed in a finally block.

    Collection objects

    A collection is an object that organizes references to other objects. The collection itself has a long lifetime, but the elements in the collection Do not. Hence, a reminiscence 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 identical 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 heap size of 64 MB.

    Figure 9. heap 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 reminiscence leak, known as the Leak Collection anti-pattern (read J2EE Design Patterns, for more information on anti-patterns).


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

    Static variables and classes

    In Java, usually a class member (variable or method) is accessed in conjunction with an object of its class. In the case of static variables and methods, it is workable to consume 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 object of its class will also be created by the JVM. The class object is allocated to the heap itself. The primordial class loader will load the class object. In the case of static classes, complete the static members will also be instantiated along with the class object. Once the variable is initialized with data (typically an object), the variable remains in reminiscence as long as the class that defines it stays in memory. If the primordial class loader loads class instances, they will stay in reminiscence for the duration of the program and are not eligible for garbage collection. So static classes and associated static variables will never be garbage collected. Thus, using too many static variables leads to reminiscence leaks.


    Usage of static classes should be minimized as they stay in reminiscence 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 be implemented by doing the following:

  • Implementing a static routine that returns an instance of the class
  • Making the constructor private so a class instance can be 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(); return 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 unique object must be created, it will be retrieved from the cache if it is present there, otherwise, a unique object will be created.

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

    Once the Singleton class is instantiated, it remains in reminiscence for the application's lifetime. The other objects will also gain a live reference to it and, as a result, will never be garbage collected.


    Avoid referencing objects from long-lasting objects. If such usage cannot be avoided, consume a weak reference, a type of object reference that does not forestall the object from being garbage collected.

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