310-092 exam Dumps Source : Sun Cert Bus Component Developer Java EE Platform 5, Upgrade
Test Code : 310-092
Test name : Sun Cert Bus Component Developer Java EE Platform 5, Upgrade
Vendor name : SUN
: 150 true Questions
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Utilities believe been gradual 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 requisite to simplify and assist 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 industry options that include Cisco Resilient Mesh and their FAN routers, aim-constructed to augment 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 elect a glance.
The challenge of interoperability
typically, utilities and sensible cities should fill a variety of networking utilize instances, with options from various carriers, managed by using diverse operations corporations or even finish shoppers. for instance, an influence utility may also utilize smart grid, advanced Metering Infrastructure (AMI) and Distribution Automation (DA) networks. Interoperability becomes much more critical in the event that they requisite to integrate dispensed power elements (DER), which could include 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 utilize of proprietary protection protocols. but that continually hypothetical 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 complete 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 complete 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 utilize the network effortlessly. in the meantime, they can continue to Run varied networks each and every with diverse conversation technologies for diverse purposes (e.g., line sensor vs. volt-var manage) and proceed to elect supervision of immoderate 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 elect a returned seat in conversations. Yet interoperability is key for continued augment in IoT – and that’s the spot 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 paraphernalia vendors scrambling to derive licensed. With utilities enabling prudent city infrastructures enjoy road lights, EV charging, and smart parking, a great 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 subsist in a position. We’re carrying on with to toil on advanced features similar to time distribution, adaptive records expense and modulation, peer-to-peer verbal exchange, QoS and comfortable certificates re-enrollment.
Interoperability is a notable factor in reaching IoT success – and we’ll derive you there.
President Donald Trump has denied a brand recent Jersey-born woman’s request to arrive to the us after she left to connect the Islamic situation community.
Hoda Muthana changed into born in Hackensack and raised in Alabama. She left the united states in 2014 to subsist Part of the Islamic situation in Syria after becoming radicalized.
Muthana wants to arrive to the U.S. together with her younger son, however that request became denied.
Secretary of situation 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 recent 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 passage to derive your identify on the choicest “fry” checklist.
A reminiscence chip containing a list of submitted names could subsist inserted into the Parker solar Probe, which is scheduled to launch from NASA’s Kennedy district middle next yr. You will also subsist 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 finish 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 subsist bombarded by the sun’s extreme heat, solar winds, and high-power radiation from December 2024 through to some factor in late 2025 when the probe is likely to meet a flaming end. No humans will subsist in a position to subsist Part of the Parker Probe for the experience, however at least their names will also subsist incinerated in their stead.
This chance is so wonderful that even Captain Kirk desires you to finish 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 soar shut satisfactory to measure alterations in solar wind speeds, keep high-energy solar particles, and examine the constitution of the sun’s magnetic fields. At its closest approach, the Parker probe could subsist 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 passage 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 subsist 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 peep after to protect its inside accessories and the reminiscence chip containing your precious name. privilege through its closest method, the Parker probe could subsist zooming at 430,000 mph (700,000 k/hr), a precipitate that might derive 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 subsist flung towards Venus, where the spacecraft will utilize repeated gravity assists—seven orbits in seven years—to derive ever-nearer to its destination, the solar’s low solar corona, or environment.
So how chilly would it's to believe your identify on this thing? Submissions should subsist accepted until April 27, 2018, so don’t consume an chance to believe your identify included: ship Your identify to the sun.
update: They believe been inquisitive 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 subsist out of propellant and unable to create adjustments to maintain the thermal protection gadget (TPS, or heat peep 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 soar the mission for NASA). So the probe will indeed fry at some point soon after the mission concludes in late 2025.
Correction: A customary version incorrectly stated that Brown is from NASA.
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This is the first in a two-part series about the Oracle tremendous data strategy. It weighs the pros and cons of a tremendous data platform built on commodity hardware vs. appliances.
Many organizations are grappling with the issue of tremendous data as they peep for ways to manage and analyze great collections of information. Two accepted approaches believe emerged for implementing tremendous 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 tremendous data strategy -- is to purchase an appliance that contains complete the hardware and software necessary to implement tremendous data. At the heart of either approach is Apache Hadoop, an open source software platform for managing and accessing unstructured data. Both approaches rely 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 complete 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 great clusters, you'll also find a name 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 name node functionality is often implemented on the master node.
An notable component of Hadoop is the MapReduce framework. The framework works in conjunction with HDFS to smash great data sets into manageable blocks that can subsist distributed across thousands of computers and replicated within the cluster to ensure frailty tolerance. The MapReduce framework also 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 share a common architecture, adhere to open standards and hold compatible interfaces, making it effortless to interchange one system with another. Not surprisingly, the expense tags on these computers are significantly lower than high-end custom servers often touted for tremendous data platforms -- a fact that may not subsist in line with an Oracle tremendous data strategy seeking to sell you big, expensive server hardware.
Implementing Hadoop on commodity hardware can appear to subsist 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 tremendous data platform on Hadoop, however, involves a lot more than downloading software and setting up a bunch of computers. A tremendous data project must elect 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 complete that, you requisite a significant flush of expertise from professionals who understand the subtleties and pitfalls of tremendous data. You also requisite a objective amount of time and money.The rise of the tremendous data appliance
Despite the effortless access to commodity hardware and open source software, implementing a tremendous data platform is no minuscule task. The Oracle tremendous data strategy seeks to inveigle organizations into buying proprietary systems, such as the Oracle tremendous Data Appliance, which contains complete the hardware and software necessary to implement tremendous 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 depart upon delivery.
The Oracle tremendous 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 tremendous 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 uphold is available for both hardware and software maintenance.
For organizations looking to implement tremendous data as quickly and easily as possible, appliances can appear the impeccable answer. But they don't arrive cheap. For instance, the replete Oracle tremendous Data Appliance costs $450,000, plus $54,000 per year for system uphold 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 circle out to subsist 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 effortless decision. You must elect into account not only the costs of implementing and managing a tremendous data platform, but also 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 deem 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 industry intelligence design and implementation.
SAP NetWeaver is the technology platform on which complete applications run, from SAP industry 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 also 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 uncertainty among customers about the future of SAP’s technology platform. But at TechEd 2010 in Berlin, CTO Vishal Sikka dispelled complete doubts and presented SAP NetWeaver 7.3.
The recent version is set to become available at the start of 2011 and provides a total ambit 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 also recent as a publish-and-subscribe function. Furthermore, SAP NetWeaver 7.3 supports WS Policy 1.2, SOAP 1.2, WS dependence 1.3, Java SE 6, JSR 168/286, WSRP 1.0, and SAML 1.0/2.0.Evaluating data in true 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 recent version of SAP NetWeaver. Release 7.3 supports SAP industry Suite upgrades in the live system. This means that enhancement packages can subsist imported easily and with minimum downtime.
With the recent 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 subsist integrated with the recent version, too. Further collaboration functions are also available in the configuration of enterprise workspaces and Duet Enterprise software. This enables more people to toil on one project at the selfsame 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 subsist pleased enhanced functions with the recent 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 utilize SAP NetWeaver CE, as well. Those who already developed applications using SAP NetWeaver CE can now finish so using their own portal box.
SAP NetWeaver Visual Composer: SAP NetWeaver Visual Composer enables developers to create user interfaces. In the recent version, a wizard generates the conversion report. With SAP NetWeaver Visual Composer, applications with a simple user interface or Web services can subsist built. The tool 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 subsist reproduced and simulated for test purposes. The preview button is new, as is the editor to which RTF documents can subsist uploaded.
HTML 5 is the upcoming Web standard, which adds a total ambit of recent functions to Internet pages. In the future, the SAP NetWeaver technology platform will also uphold 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 requisite to upgrade their server to version 7.3. SAP promises that most custom developments will Run smoothly after the upgrade. However, there are exceptions for Web Dynpro, Java, and Composite Application Framework (CAF). Fortunately, there are tools for such cases – enjoy the design-time migration procedure. For complete 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 tool for upgrading to SAP NetWeaver 7.3. In addition, there’s a Java upgrade tool to upgrade the Java application server to the recent version. What’s more, a separate DVD called the Upgrade Master DVD is supplied. The system character is recognized automatically, regardless of whether it is ABAP or Java. SAPJup extracts complete the key upgrade tools and gathers information such as passwords and add-ons. The tool also checks the operating system and the database, so that the target release can subsist imported. The processes are preconfigured in a shadow system. The installation and the upgrade of the individual server components are also performed in the shadow system. During this time, the production system remains live. As a result, the upgrade can subsist 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 Run 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 customary source code needs to subsist 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 tool is updated, the data records are also transferred from SAP NetWeaver 7.0 using the migration wizard. The repose has to subsist 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 industry objects.
SAP NetWeaver Visual Composer (SAP NetWeaver VC): User interfaces that were developed in SAP NetWeaver 7.0 finish not believe to subsist migrated, because they are updated automatically. A migration is required only for complete those interfaces where development is not yet completed.
Guided Procedures (GP): GP objects can subsist upgraded using the yardstick upgrade process (SAPJup). After this, the processes are available in the updated SAP NetWeaver 7.3 server. The GP processes continue to Run automatically after the server upgrade.
J2EE/Java EE 5: The yardstick upgrade procedure automatically transfers complete J2EE applications, so a manual migration is not necessary.
We can visualize resource starvation using an intricate 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 method for verifying theories on resource allocation ever since.
The metaphor goes enjoy 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 consume 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 subsist able to consume and eventually they'll starve. If Plato drops his chopsticks and immediately picks them up before the other philosophers can derive them then they won't subsist able to consume 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 consume spaghetti with a solitary chopstick (see design 1).
These are examples of resource starvation. You could also encounter deadlock. There are a couple of solutions enjoy semaphores and monitors. But they won't contemplate 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 appear 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 practicable 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 also subsist 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 assist diagnose these problems easily, motivated by the selfsame reasons as my other garage projects enjoy IBM HeapAnalyzer, IBM Pattern Modeling and Analysis Tool, and IBM Performance Analyzer for Java for Windows. complete 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 superb as of October 2008).
What Is a Thread Dump?A Java thread dump is the one of the traces/dumps that JVM provides to assist 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 subsist a list of complete the threads that Run on a Java virtual machine. Usually thread dumps believe more than just thread information. Thread dumps can relent information about the operating system, application environment, threads, stacks, locks, and memory. IBM Thread Dumps/Javacores provide much more information enjoy 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 also subsist 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 selfsame 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 great as heap dumps. Usually its size is around 1MB or less unless you believe great number of threads or classes. It's not a tremendous 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 heap information (maximum Java heap size, initial Java heap size, garbage collector counter, allocation failure counter, free Java heap size, and allocated Java heap size), number of runnable threads, total number of threads, number of monitors locked, native reminiscence usage of each JVM component, and deadlock information.
IBM Thread and Monitor Dump Analyzer for Java also provides you with the recommended size of the Java heap 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 eventual Javacore, the number of garbage collections a minute, the number of allocation failures a minute, the time between the first Javacore and the eventual Javacore, the number of hang suspects, and a list of hang suspects.
This technology also compares complete monitor information in a Javacore and detects deadlock and resource contention or monitor bottlenecks, if there are any.
Let's derive 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 name has a suffix that represents a priority since they want to give Plato more of a casual to eat. Besides a name and priority, each philosopher is also given a left chopstick and a privilege 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 name of chopstick as shown in Listing 2
In Philosopher.java, they create a constructor, getters and setters for privilege and left chopsticks, and the philosopher's name. They also override the run() method in which they acquire Java's built-in monitors for left and privilege chopsticks and muster the eat() method. In each () method, they intermission for two seconds to simulate eating with the sleep() method but retain in mind that the philosopher is eating, not sleeping in the eat() method. discern Listing 3.
Now let's achieve complete the classes in a subdirectory, compile, and Run 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 subsist eating and the other two philosophers will believe less of a casual to eat. They can generate thread dumps by sending signal 3 to the process. On the Windows platform, you can utilize keyboard combinations enjoy Ctrl-Break to ship 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 limited 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 also generate thread dumps with IBM's JavaDump API: com.ibm.jvm.Dump.JavaDump() if you're running a IBM Java virtual machine.
You can utilize the slay command on most Unix systems:
For example, slay -3 $PID
For example, slay -11 $PID
On the IBM WebSphere Application Server 5/6 environment, you can utilize wsadmin script to generate thread dumps:
wsadmin.sh -conntype SOAP -port <port number>> set jvm [$AdminControl completeObjectName type=JVM,process=server1,*]> $AdminControl invoke $jvm dumpThreads
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