310-092 exam Dumps Source : Sun Cert Bus Component Developer Java EE Platform 5, Upgrade
Test Code : 310-092
Test designation : Sun Cert Bus Component Developer Java EE Platform 5, Upgrade
Vendor designation : SUN
braindumps : 150 actual Questions
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Utilities believe been unhurried to undertake IoT networking because of lengthy upgrade cycles and interoperability complexities throughout several functions with differing network needs. Yet, more and more, they hear their utility consumers emphasize the need to simplify and allay huge-scale out of doors networks that tackle an array of solutions from sensible metering and distribution automation, to demand response and renewable power integration.
At DistribuTECH, they shared how Cisco’s carrying on with innovation is assembly this problem. They showcased their replete portfolio of utility traffic options that comprehend Cisco Resilient Mesh and their FAN routers, aim-constructed to enlarge interoperability. And they announced that Cisco is the first to obtain Wi-sun bailiwick enviornment community (FAN) 1.0 interoperability certification for their IR509 Cisco Resilient Mesh industrial router.
Why is interoperability so essential? Let’s rob a glance.
The challenge of interoperability
typically, utilities and sensible cities should answer a variety of networking consume instances, with options from various carriers, managed by using diverse operations corporations or even tarry shoppers. for instance, an influence utility may likewise consume smart grid, advanced Metering Infrastructure (AMI) and Distribution Automation (DA) networks. Interoperability becomes much more censorious in the event that they need to integrate dispensed power elements (DER), which could comprehend options where they don’t believe direct control, reminiscent of domestic photo voltaic, electric powered automobile charging stations, or prudent highway lighting.
First technology smart grid AMI and DA networks frequently used proprietary mesh networking technologies, partly IP-enabled and the consume of proprietary protection protocols. but that continually suppositious protection became less scrutinized, less strong, and can believe had unknown vulnerabilities. devoid of ample interoperability, utilities had been forced to first select a community infrastructure vendor, after which require total of their grid machine vendors (e.g., for line sensors, meters, cap bank controllers) to combine/certify verbal exchange modules from that network dealer.
The result is a very inefficient, time- and cost-intensive technique for total and sundry concerned. A utility typically has to attend a very long time unless the integration and container compliance is executed for the entire grid gadgets earlier than they can deploy and consume the network effortlessly. in the meantime, they can continue to hasten varied networks each and every with diverse conversation technologies for diverse purposes (e.g., line sensor vs. volt-var manage) and proceed to rob charge of inordinate preservation can charge, complexity, and fragility of their programs.
Cisco IoT options goal to reduce interoperability complexities with intent-primarily based networking, and aid velocity implementation by means of bringing partners together via their IoT DevNet software.
constructing cozy and respectable interoperability
while security and reliability are proper of mind for their utility clients, interoperability tends to rob a returned seat in conversations. Yet interoperability is key for continued enlarge in IoT – and that’s the station they are available in. Cisco is main the pack with their IR509 router, the first with Wi-sun FAN 1.0 interoperability certification.
Wi-solar FAN 1.0 gives for fundamental interoperability of instruments for community discovery, association, authentication, key exchange and rotation, encryption, RPL routing, and IPv6 tackle project. Wi-solar compliance is gaining consideration, and that has each community vendors and materiel vendors scrambling to regain licensed. With utilities enabling prudent city infrastructures fancy road lights, EV charging, and smart parking, a big number of vendors and purposes are converging on the equal network, making wider adoption of Wi-sun inevitable.
meanwhile, as Wi-sun is evolving towards FAN 2.0 necessities, Cisco is preserving tempo to exist in a position. We’re carrying on with to labor on advanced features similar to time distribution, adaptive records expense and modulation, peer-to-peer verbal exchange, QoS and restful certificates re-enrollment.
Interoperability is a considerable element in reaching IoT success – and we’ll regain you there.
President Donald Trump has denied a brand unusual Jersey-born woman’s request to gain to the us after she left to connect the Islamic status community.
Hoda Muthana changed into born in Hackensack and raised in Alabama. She left the united states in 2014 to exist Part of the Islamic status in Syria after becoming radicalized.
Muthana wants to gain to the U.S. together with her younger son, however that request became denied.
Secretary of status Mike Pompeo says that Muthana isn't any longer a U.S. citizen. Muthana’s legal professional is challenging that pretension and says that he has her unusual Jersey start certificate to prove it.
Muthana says that she regrets her determination to connect the terrorist neighborhood.
The pleasant individuals at NASA are sending a spacecraft to the solar, and they are looking to ship a bit piece of you along with it. here’s the course to regain your identify on the choicest “fry” checklist.
A reminiscence chip containing a list of submitted names could exist inserted into the Parker solar Probe, which is scheduled to launch from NASA’s Kennedy district middle next yr. You will likewise exist blanketed on this Hot Ticket—get it, since the solar is scorching—via going here and submitting your name. It took me about 30 seconds to conclude it, after which NASA despatched me this sexy certificates which i can now sing their own praises to you guys.
Yay, this capacity the 13 letters that signify my id may exist bombarded by the sun’s extreme heat, solar winds, and high-power radiation from December 2024 through to some element in late 2025 when the probe is likely to meet a flaming end. No humans will exist in a position to exist Part of the Parker Probe for the experience, however at least their names will likewise exist incinerated in their stead.
This break is so wonderful that even Captain Kirk desires you to conclude it.
The spacecraft, named after astrophysicist Eugene Parker, will examine the sun in—actually—excruciating detail. Over the route of a yr, the probe will glide shut satisfactory to measure alterations in solar wind speeds, celebrate high-energy solar particles, and examine the constitution of the sun’s magnetic fields. At its closest approach, the Parker probe could exist 8.5 solar radii (it really is, 8.5 times the radius of the solar, or 3.67 miles/5.9 million km) from the solar’s floor, widespread as the photosphere. That’s seven times closer than the previous proximity list, held by course of the Helios 2 spacecraft, which came inside 27 million miles (forty three million km) of the solar in 1976.
At this distance, the spacecraft will exist uncovered to temperatures exceeding 2,500 levels F, (1,377 C). NASA will equip the probe with a 4.5-inch-thick (eleven.four cm) carbon-composite peer after to protect its inside accessories and the recollection chip containing your precious name. right through its closest method, the Parker probe could exist zooming at 430,000 mph (700,000 k/hr), a quicken that might regain you from Washington D.C. to Philadelphia in one Hot second.
The probe will launch aboard a Delta IV-Heavy rocket geared up with an higher stage sometime between July 31 and August 19, 2018. It’ll exist flung towards Venus, where the spacecraft will consume repeated gravity assists—seven orbits in seven years—to regain ever-nearer to its destination, the solar’s low solar corona, or environment.
So how frosty would it's to believe your identify on this thing? Submissions should exist accepted until April 27, 2018, so don’t fritter an break to believe your identify included: route Your identify to the sun.
update: They believe been snoopy as to the premier destiny of the probe, so they asked NASA for an explanation.
“The spacecraft will settle into a stable orbit across the sun—however, at some aspect after the conclusion of the simple mission, the spacecraft may exist out of propellant and unable to get adjustments to maintain the thermal protection gadget (TPS, or heat peer after) accurately oriented to give protection to itself,” spoke of Geoffrey Brown, the public Affairs Officer at Johns Hopkins applied Physics Laboratory—the institution that constructed and will glide the mission for NASA). So the probe will indeed fry at some point soon after the mission concludes in late 2025.
Correction: A develope version incorrectly stated that Brown is from NASA.
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This is the first in a two-part series about the Oracle mammoth data strategy. It weighs the pros and cons of a mammoth data platform built on commodity hardware vs. appliances.
Many organizations are grappling with the issue of mammoth data as they peer for ways to manage and analyze big collections of information. Two common approaches believe emerged for implementing mammoth data. The first is to build an infrastructure in-house that relies heavily on commodity hardware and open source software. The second -- which is more at the heart of the Oracle mammoth data strategy -- is to purchase an appliance that contains total the hardware and software necessary to implement mammoth data. At the heart of either approach is Apache Hadoop, an open source software platform for managing and accessing unstructured data. Both approaches confidence heavily on Hadoop and are designed around its architecture.Hadoop and the commodity-based approach
Hadoop is a master/slave architecture typically implemented on clustered Linux computers. Each cluster contains a master node and multiple slave nodes. The master node manages the slave nodes and total tasks related to processing and accessing the data files on those nodes. The slave nodes manage the data files and process read and write requests to the files. In big clusters, you'll likewise find a designation node that manages the Hadoop Distributed File System (HDFS) namespace and regulates access to the data files. The HDFS provides the structure necessary to store, manage and access the files. On smaller clusters, the designation node functionality is often implemented on the master node.
An considerable component of Hadoop is the MapReduce framework. The framework works in conjunction with HDFS to fracture big data sets into manageable blocks that can exist distributed across thousands of computers and replicated within the cluster to ensure vice tolerance. The MapReduce framework likewise balances the load among the slave nodes in order to deliver efficient parallel operations, such as searching data, processing complex client requests and performing in-depth analyses.
Hadoop, HDFS and the MapReduce framework were designed with commodity hardware in mind. This hardware is usually made up of PC-based computers whose components partake a common architecture, adhere to open standards and hold compatible interfaces, making it smooth to interchange one system with another. Not surprisingly, the charge tags on these computers are significantly lower than high-end custom servers often touted for mammoth data platforms -- a fact that may not exist in line with an Oracle mammoth data strategy seeking to sell you big, expensive server hardware.
Implementing Hadoop on commodity hardware can look to exist an appealing option to the organization looking to redeem money. It has already been proven in such organizations as Google and Yahoo. Google, for example, processes over 20 petabytes of data every day on commodity hardware. structure a mammoth data platform on Hadoop, however, involves a lot more than downloading software and setting up a bunch of computers. A mammoth data project must rob into account the resources and time necessary to configure Hadoop, implement supporting software, set up the network infrastructure, connect Hadoop to other systems, develop custom code, implement analytics, and manage the system and data on an ongoing basis. For total that, you need a significant flush of expertise from professionals who understand the subtleties and pitfalls of mammoth data. You likewise need a objective amount of time and money.The tower of the mammoth data appliance
Despite the smooth access to commodity hardware and open source software, implementing a mammoth data platform is no small task. The Oracle mammoth data strategy seeks to tempt organizations into buying proprietary systems, such as the Oracle mammoth Data Appliance, which contains total the hardware and software necessary to implement mammoth data. But an appliance is not just a pile of servers and shrink-wrapped software. The components are tightly bundled into a preconfigured package that's fully tested and ready to Go upon delivery.
The Oracle mammoth Data Appliance, for example, comes with a rack of 18 Sun Microsystems computers and storage nodes, multiple Infiniband switches and cables, redundant power distribution units, and spare storage disks. On the software side, the appliance is set up with Oracle Enterprise Linux, Cloudera's Distribution including Apache Hadoop, Cloudera Manager, Oracle NoSQL Database, Oracle R and Oracle mammoth Data Connectors. Oracle's appliance provides more than 600 terabytes of raw storage capacity, preconfigured with a Hadoop cluster ready to accept unstructured data. Premium champion is available for both hardware and software maintenance.
For organizations looking to implement mammoth data as quickly and easily as possible, appliances can look the faultless answer. But they don't gain cheap. For instance, the replete Oracle mammoth Data Appliance costs $450,000, plus $54,000 per year for system champion and another $36,000 per year for operating system support. You can buy a lot of commodity hardware for that kindhearted of money. But for the organization that doesn't believe the in-house resources and expertise necessary to build its own system, an appliance can turn out to exist quite the bargain.Appliance vs. commodity hardware
Both commodity-based and appliance-based platforms offer their own advantages and disadvantages, and choosing one over the other is rarely an smooth decision. You must rob into account not only the costs of implementing and managing a mammoth data platform, but likewise the long-range expectations of such a system. In the second article of this two-part series, we'll dig deeper into several issues you should reckon when you're deciding whether to build or buy.
About the author: Robert Sheldon is a technical consultant and the author of numerous books, articles and training material related to Microsoft Windows, various relational database management systems, and traffic intelligence design and implementation.
SAP NetWeaver is the technology platform on which total applications run, from SAP traffic Suite, SAP ERP, and SAP Customer Relationship Management through custom developments. As middleware, SAP NetWeaver ensures that the SAP software runs smoothly and enables developers to build their own applications. The platform comprises SAP NetWeaver Portal, SAP NetWeaver Mobile, SAP NetWeaver Composition Environment (SAP NetWeaver CE), and SAP NetWeaver Process Integration (SAP NetWeaver PI). For more information about SAP NetWeaver, you can likewise check out their article Integrating Third-Party Software into SAP.
Over the past few months, rumors that SAP plans to sideline SAP NetWeaver believe been circulating, creating considerable dubiety among customers about the future of SAP’s technology platform. But at TechEd 2010 in Berlin, CTO Vishal Sikka dispelled total doubts and presented SAP NetWeaver 7.3.
The unusual version is set to become available at the start of 2011 and provides a gross sweep of revised functions. For example, release 7.3 supports Java EE 5 as well as Enterprise Service Bus (ESB) for Java. The Java Message Service (JMS) is likewise unusual as a publish-and-subscribe function. Furthermore, SAP NetWeaver 7.3 supports WS Policy 1.2, SOAP 1.2, WS confidence 1.3, Java SE 6, JSR 168/286, WSRP 1.0, and SAML 1.0/2.0.Evaluating data in actual time
SAP NetWeaver 7.3 is well equipped for in-memory computing. The SAP High-Performance Analytic Appliance (SAP HANA) software enables rapid access to applications and supports different application areas such as analyses, performance, and management. Because the server runs parallel to the database, the data required becomes available even faster.
A particularly practical feature is that up to 40% more users can access the unusual version of SAP NetWeaver. Release 7.3 supports SAP traffic Suite upgrades in the live system. This means that enhancement packages can exist imported easily and with minimum downtime.
With the unusual version, SAP promises a number of improvements for employees working in the bailiwick of application development, particularly – but not exclusively – mobile applications. Microsoft outdo files can exist integrated with the unusual version, too. Further collaboration functions are likewise available in the shape of enterprise workspaces and Duet Enterprise software. This enables more people to labor on one project at the very time.
And for operators of online shops: SAP NetWeaver PI can connect with PayPal X payment automation platform.
Read on: SAP NetWeaver 7.3 – What’s NewEnhanced Functions in Version 7.3
Developers who program their own applications based on SAP NetWeaver can indulge in enhanced functions with the unusual release of the technology platform. This especially applies to SAP NetWeaver Composition Environment (SAP NetWeaver CE), Web Dynpro, and SAP NetWeaver Visual Composer.
SAP NetWeaver Composition Environment: Developers who previously used Web Dynpro for Java or SAP NetWeaver Visual Composer can now consume SAP NetWeaver CE, as well. Those who already developed applications using SAP NetWeaver CE can now conclude so using their own portal box.
SAP NetWeaver Visual Composer: SAP NetWeaver Visual Composer enables developers to create user interfaces. In the unusual version, a wizard generates the conversion report. With SAP NetWeaver Visual Composer, applications with a simple user interface or Web services can exist built. The appliance makes applications easier to program. Furthermore, SAP NetWeaver Visual Composer helps developers create user interfaces for service applications. What’s special about this is that services can exist reproduced and simulated for test purposes. The preview button is new, as is the editor to which RTF documents can exist uploaded.
HTML 5 is the upcoming Web standard, which adds a gross sweep of unusual functions to Internet pages. In the future, the SAP NetWeaver technology platform will likewise champion HTML 5 and on-demand services
Read on: How It’s Done: Upgrade to Version 7.3How It’s Done: Upgrade to Version 7.3
Customers who deploy SAP NetWeaver 7.0 will need to upgrade their server to version 7.3. SAP promises that most custom developments will hasten smoothly after the upgrade. However, there are exceptions for Web Dynpro, Java, and Composite Application Framework (CAF). Fortunately, there are tools for such cases – fancy the design-time migration procedure. For total other homegrown developments that are based on Visual Composer (VC), Guided Procedures (GP), or J2EE, an upgrade is only required if there are plans to develop these homegrown developments further in the future.
Server upgrade: SAPJup is the appliance for upgrading to SAP NetWeaver 7.3. In addition, there’s a Java upgrade appliance to upgrade the Java application server to the unusual version. What’s more, a sunder DVD called the Upgrade Master DVD is supplied. The system character is recognized automatically, regardless of whether it is ABAP or Java. SAPJup extracts total the key upgrade tools and gathers information such as passwords and add-ons. The appliance likewise checks the operating system and the database, so that the target release can exist imported. The processes are preconfigured in a shadow system. The installation and the upgrade of the individual server components are likewise performed in the shadow system. During this time, the production system remains live. As a result, the upgrade can exist performed without delays or downtime.
Migration controller: The migration controller migrates changes from the original release to the shadow system. It enables custom-developed applications to hasten on the target release.
Migrating Web Dynpro to version 7.3: A wizard helps users with the migration. For customers who are already using version 7.0, a migration is not absolutely necessary. With SAP NetWeaver CE 7.1, the source code is compatible with the Web Dynpro Java applications, but it is not binary. This means that the develope source code needs to exist overwritten. By contrast, the applications in SAP NetWeaver CE 7.1 are binary, which means that they update themselves automatically during the migration.
SAP Composite Application Framework (SAP CAF) from SAP NetWeaver 7.0x to 7.3: When the SAP Composite Application Framework appliance is updated, the data records are likewise transferred from SAP NetWeaver 7.0 using the migration wizard. The relaxation has to exist migrated manually. During the migration, a browser window opens from which the administrator can select and synchronize the data records. The data records are automatically connected to traffic objects.
SAP NetWeaver Visual Composer (SAP NetWeaver VC): User interfaces that were developed in SAP NetWeaver 7.0 conclude not believe to exist migrated, because they are updated automatically. A migration is required only for total those interfaces where evolution is not yet completed.
Guided Procedures (GP): GP objects can exist upgraded using the criterion upgrade process (SAPJup). After this, the processes are available in the updated SAP NetWeaver 7.3 server. The GP processes continue to hasten automatically after the server upgrade.
J2EE/Java EE 5: The criterion upgrade procedure automatically transfers total J2EE applications, so a manual migration is not necessary.
We can visualize resource starvation using an elaborate rendition of the Dining Philosophers Problem. This classic metaphor of resource allocation among processes was first introduced in 1971 by Edsger Dijkstra in his paper "Hierarchical Ordering of Sequential Processes." It's been a model and universal routine for verifying theories on resource allocation ever since.
The metaphor goes fancy this: There are three well-known philosophers in an Asian bistro. Dinner is served but they are only given three chopsticks because the restaurant's supply truck has been stuck in a snow storm for a couple of days. Naturally each philosopher needs two chopsticks to devour his dinner and each is protected from interference while he uses a chopstick.
Plato skipped lunch that day and insists that he should believe priority or else he'll faint. If he doesn't give up his chopsticks, the other philosophers won't exist able to devour and eventually they'll starve. If Plato drops his chopsticks and immediately picks them up before the other philosophers can regain them then they won't exist able to devour and they'll eventually starve.
Dijkstra's Dining Philosophers Problem employed spaghetti and forks but I used chopsticks and Asian cuisine for a more realistic illustration since you can't devour spaghetti with a single chopstick (see pattern 1).
These are examples of resource starvation. You could likewise encounter deadlock. There are a couple of solutions fancy semaphores and monitors. But they won't reckon about solutions or deadlocks in this article. We'll focus on detecting resource starvation using IBM Thread and Monitor Dump Analyzer for Java.
What Is the IBM Thread and Monitor Dump Analyzer for Java?During the runtime of a Java process, some Java Virtual Machines (JVMs) may not respond predictably and often look to hang up for a long time or indefinitely (until the JVM shuts down). It's sometimes very challenging to determine the root causes of these sorts of problems.
By triggering Java thread dumps or Javacores when a Java process doesn't respond, it's workable to collect diagnostic information related to the JVM and a Java application captured at a particular point during execution.
On some platforms, a Javacore is known as "javadump." The code that creates a Javacore is Part of the JVM. One can control it by using environment variables and runtime switches. By default, a Javacore occurs when the JVM terminates unexpectedly. A Javacore can likewise exist triggered by sending specific signals to the JVM. Although a Javacore or javadump can occur in Solaris JVMs, much of the content of the Javacore is added by IBM and, so, is present only in IBM JVMs.
IBM Thread and Monitor Dump Analyzer for Java analyzes thread dumps/Javacores and diagnoses monitor locks and thread activities to identify the root causes of hangs, deadlocks, and resource contention or monitor bottlenecks. It can analyze IBM, Solaris, and HP-UX Java thread dumps from Java Virtual Machine 1.3.1, 1.4.x, 5.0, and 6.0
More than three years ago, I created IBM Thread and Monitor Dump Analyzer for Java as a garage project and spent thousands of hours during weeknights, weekends, and vacations to provide my clients and colleagues with something that can allay diagnose these problems easily, motivated by the very reasons as my other garage projects fancy IBM HeapAnalyzer, IBM Pattern Modeling and Analysis Tool, and IBM Performance Analyzer for Java for Windows. total the algorithms used believe been filed with the U.S. Patent and Trademark Office.
The widgetry was introduced to the public about two years ago through alphaWorks where it's been one of the top downloads for 30 consecutive months. It's recorded 23,296 downloads so far and it's been used by more than 14,600 companies, government agencies, research facilities, and universities worldwide (these statistics are well-behaved as of October 2008).
What Is a Thread Dump?A Java thread dump is the one of the traces/dumps that JVM provides to allay diagnosis a hang, deadlock, or monitor contention issue. It contains diagnostic information related to the JVM and a Java application captured at a point during execution. For example, the information can exist a list of total the threads that hasten on a Java virtual machine. Usually thread dumps believe more than just thread information. Thread dumps can produce information about the operating system, application environment, threads, stacks, locks, and memory. IBM Thread Dumps/Javacores provide much more information fancy core interface, data conversion/unicode, class, diagnosis, execution management/thread management, lock, execution engine, mixed mode interpreter, JIT (Just-in-Time compiler), storage/JVM heap, and hardware portability interface/extended hardware portability interface.
The contents and formats of Java thread dumps depend on the platform you're running on and the JVM provider.
Since a thread dump's format isn't a Part of the SDK specification, each SDK vendor provides a unique thread dump format and its own JVM information. Currently IBM Thread and Monitor Dump Analyzer for Java understands IBM, Solaris, and HP-UX Java thread dump formats.
By default, IBM JVM thread dumps occur when the JVM terminates unexpectedly. A thread dump can likewise exist triggered by sending specific signals to the JVM. Thread dumps are usually human readable text. In an IBM JVM, the thread dump is often called a Javadump or Javacore. Javacore is NOT the very as a core file, which is generated by a system dump.
Before IBM Thread and Monitor Dump Analyzer for Java was introduced, people had to manually check hundreds of threads in the thread dumps using their favorite editors. With IBM Thread and Monitor Dump Analyzer for Java, they can easily diagnose a variety of issues without reading through hundreds of thread stack traces.
Usually thread dumps aren't as big as mound dumps. Usually its size is around 1MB or less unless you believe big number of threads or classes. It's not a mammoth deal to manually review thread dumps if you only believe a handful of threads running on your JVM. If you believe hundreds of threads with dozens of Java monitors, it gets complicated.
How Does It Work?This technology analyzes the information in each thread and provides diagnostic information, such as current thread information, the signal that caused the Javacore/Java mound information (maximum Java mound size, initial Java mound size, garbage collector counter, allocation failure counter, free Java mound size, and allocated Java mound size), number of runnable threads, total number of threads, number of monitors locked, indigenous recollection usage of each JVM component, and deadlock information.
IBM Thread and Monitor Dump Analyzer for Java likewise provides you with the recommended size of the Java mound cluster (applicable only to IBM SDK 1.4.2 and 1.3.1 SR7 or above) based on a heuristic analysis engine.
It compares each Javacore and provides process ID information for threads, a time stamp of the first Javacore, a time stamp of the final Javacore, the number of garbage collections a minute, the number of allocation failures a minute, the time between the first Javacore and the final Javacore, the number of hang suspects, and a list of hang suspects.
This technology likewise compares total monitor information in a Javacore and detects deadlock and resource contention or monitor bottlenecks, if there are any.
Let's regain StartedWe can simulate a starvation problem with a simple Java application.
In DiningPhilosophers.java, they created three chopsticks, c1, c2, and c3 with the names, chopstick 1, chopstick 2, and chopstick3. Then they created three philosophers, p1, p2, and p3 with the names, Socrates, Plato, and Aristotle. You might believe noticed that each philosopher's designation has a suffix that represents a priority since they want to give Plato more of a chance to eat. Besides a designation and priority, each philosopher is likewise given a left chopstick and a right chopstick. They start with each philosopher, p1, p2, and p3 as shown in Listing 1. (Download Listings 1-6 here.)
In Chopstick.java, they just create a constructor, a getter, and a setter for the designation of chopstick as shown in Listing 2
In Philosopher.java, they create a constructor, getters and setters for right and left chopsticks, and the philosopher's name. They likewise override the run() routine in which they acquire Java's built-in monitors for left and right chopsticks and muster the eat() method. In each () method, they recess for two seconds to simulate eating with the sleep() routine but preserve in mind that the philosopher is eating, not sleeping in the eat() method. see Listing 3.
Now let's Put total the classes in a subdirectory, compile, and hasten them.
Compiling classes on a Unix platformjavac com/ibm/Jinwoo/starvation/DiningPhilosophers.java
Compiling classes on a Windows platformjavac com\ibm\jinwoo\starvation\DiningPhilosophers.java
I used the latest release of IBM Java virtual machine 6.0 (build jvmwi3260-20080816_22093 VM build 20080816_022093_lHdSMr) and another vendor's latest release of a Java virtual machine 6.0 when I wrote this for a objective comparison.
Executing classesjava com.ibm.jinwoo.starvation.DiningPhilosophersPlato priority9 is eating with chopstick 3 and chopstick 1Plato priority9 is eating with chopstick 3 and chopstick 1Plato priority9 is eating with chopstick 3 and chopstick 1Plato priority9 is eating with chopstick 3 and chopstick 1Plato priority9 is eating with chopstick 3 and chopstick 1
Most of the time Plato will exist eating and the other two philosophers will believe less of a chance to eat. They can generate thread dumps by sending signal 3 to the process. On the Windows platform, you can consume keyboard combinations fancy Ctrl-Break to route signal 3 to a process running in a command line window. Listing 4 has the results from the IBM Java virtual machine.
We used another vendor's Java virtual machine and redirected output to a file.
Generating thread dumps with another vendor's Java virtual machinejava com.ibm.jinwoo.starvation.DiningPhilosophers 1> sun.log
Now let's talk about thread dump a Little more. In most Java platforms, thread dumps are generated when the JVM terminates unexpectedly because of an operating system signal or when the user enters a reserved key combination control-break on Windows, say. They can likewise generate thread dumps with IBM's JavaDump API: com.ibm.jvm.Dump.JavaDump() if you're running a IBM Java virtual machine.
You can consume the cancel command on most Unix systems:
For example, cancel -3 $PID
For example, cancel -11 $PID
On the IBM WebSphere Application Server 5/6 environment, you can consume wsadmin script to generate thread dumps:
wsadmin.sh -conntype SOAP -port <port number>> set jvm [$AdminControl completeObjectName type=JVM,process=server1,*]> $AdminControl invoke $jvm dumpThreads
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