Conference Management System Essay

In Java EE 6, JAX-WS provides the functionality for â€Å"big† web services, which are described in Chapter 19, Building Web Services with JAX-WS. Big web services use XML messages that follow the Simple Object Access Protocol (SOAP) standard, an XML language defining a message architecture and message formats. Such systems often contain a machine-readable description of the operations offered by the service, written in the Web Services Description Language (WSDL), an XML language for defining interfaces syntactically. The SOAP message format and the WSDL interface definition language have gained widespread adoption. Many development tools, such as NetBeans IDE, can reduce the complexity of developing web service applications. A SOAP-based design must include the following elements. †¢ A formal contract must be established to describe the interface that the web service offers. WSDL can be used to describe the details of the contract, which may include messages, operations, bindings, and the location of the web service. You may also process SOAP messages in a JAX-WS service without publishing a WSDL. †¢ The architecture must address complex nonfunctional requirements. Many web service specifications address such requirements and establish a common vocabulary for them. Examples include transactions, security, addressing, trust, coordination, and so on. †¢ The architecture needs to handle asynchronous processing and invocation. In such cases, the infrastructure provided by standards, such as Web Services Reliable Messaging (WSRM), and APIs, such as JAX-WS, with their client-side asynchronous invocation support, can be leveraged out of the box. RESTful Web Services In Java EE 6, JAX-RS provides the functionality for Representational State Transfer (RESTful) web services. REST is well suited for basic, ad hoc integration scenarios. RESTful web services, often better integrated with HTTP than SOAP-based services are, do not require XML messages or WSDL service–API definitions. Project Jersey is the production-ready reference implementation for the JAX-RS specification. Jersey implements support for the annotations defined in the JAX-RS specification, making it easy for developers to build RESTful web services with Java and the Java Virtual Machine (JVM). Because RESTful web services use existing well-known W3C and Internet Engineering Task Force (IETF) standards (HTTP, XML, URI, MIME) and have a lightweight infrastructure that allows services to be built with minimal tooling, developing RESTful web services is inexpensive and thus has a very low barrier for adoption. You can use a development tool such as NetBeans IDE to further reduce the complexity of developing RESTful web services. A RESTful design may be appropriate when the following conditions are met. †¢ The web services are completely stateless. A good test is to consider whether the interaction can survive a restart of the server. †¢ A caching infrastructure can be leveraged for performance. If the data that the web service returns is not dynamically generated and can be cached, the caching infrastructure that web servers and other intermediaries inherently provide can be leveraged to improve performance. However, the developer must take care because such caches are limited to the HTTP GET method for most servers. †¢ The service producer and service consumer have a mutual understanding of the context and content being passed along. Because there is no formal way to describe the web services interface, both parties must agree out of band on the schemas that describe the data being exchanged and on ways to process it meaningfully. In the real world, most commercial applications that expose services as RESTful implementations also distribute so-called value-added too lkits that describe the interfaces to developers in popular programming languages. †¢ Bandwidth is particularly important and needs to be limited. REST is particularly useful for limited-profile devices, such as PDAs and mobile phones, for which the overhead of headers and additional layers of SOAP elements on the XML payload must be restricted. †¢ Web service delivery or aggregation into existing web sites can be enabled easily with a RESTful style. Developers can use such technologies as JAX-RS and Asynchronous JavaScript with XML (AJAX) and such toolkits as Direct Web Remoting (DWR) to consume the services in their web applications. Rather than starting from scratch, services can be exposed with XML and consumed by HTML pages without significantly refactoring the existing web site architecture. Existing developers will be more productive because they are adding to something they are already familiar with rather than having to start from scratch with new technology. RESTful web services are discussed in Chapter 20, Building RESTful Web Services with JAX-RS. This chapter contains information about generating the skeleton of a RESTful web service using both NetBeans IDE and the Maven project management tool. Deciding Which Type of Web Service to Use Basically, you would want to use RESTful web services for integration over the web and use big web services in enterprise application integration scenarios that have advanced quality of service (QoS) requirements. †¢ JAX-WS: addresses advanced QoS requirements commonly occurring in enterprise computing. When compared to JAX-RS, JAX-WS makes it easier to support the WS-* set of protocols, which provide standards for security and reliability, among other things, and interoperate with other WS-* conforming clients and servers. †¢ JAX-RS: makes it easier to write web applications that apply some or all of the constraints of the REST style to induce desirable properties in the application, such as loose coupling (evolving the server is easier without breaking existing clients), scalability (start small and grow), and architectural simplicity (use off-the-shelf components, such as proxies or HTTP routers). You would choose to use JAX-RS for your web application because it is easier for many types of clients to consume RESTful web services while enabling the server side to evolve and scale. Clients can choose to consume some or all aspects of the service and mash it up with other web-based services. Types of Web services You can host simple Web services without the needing complex setup. In addition, experienced Web service developers can host more complex services by handling the deployment details themselves. Types of Web services include simple and complex: Simple Web services For simple Web services, only simple data types (string, int, and other types) are sent or received as arguments and values that are returned from methods. You must specify the Java class that provides the implementation for the Web service. InfoSphereâ„ ¢ MDM Server for PIM handles generating any WSDL, and creating any WSDD (Web Services Deployment Descriptor) for the deployment of the service. Complex Web services For more complex Web services, you provide WSDD to configure the ability to send and receive more than simple types. You author and provide the WSDD in the WSDD field in the Web Service Console, or through the WebService::setWsddDocPath() script operation. IBM ® InfoSphere Master Data Management Server for Product Information Management uses the WSDD to deploy the defined service instead of using default WSDD for IBM InfoSphere Master Data Management Server for Product Information Management. You must have a good understanding of Web services to author your WSDD. You must also know the Java2WSDL, and WSDL2Java tools in case you break your deployment with the complex Web service.+ Big web services Big web services are based on SOAP standard and often contain a WSDL to describe the interface that the web service offers. The details of the contract may include messages, operations, bindings, and the location of the web service. Big web services includes architecture to address complex non-functional requirements like transactions, security, addressing, trust, coordination, and also handles asynchronous processing and invocation. The SOAP message format and the WSDL interface definition language have gained widespread adoption in traditional enterprises. SOAP based Web Services is a great solution when you need, †¢ Asynchronous processing †¢ Reliability †¢ Stateful operations – If the application needs contextual information and conversational state management then SOAP 1.2 has the additional specification in the WS* structure to support those things (Security, Transactions, Coordination, etc). RESTful Web Services RESTful web services are based on the way how our web works. Our very own world wide web (www) – the largest distributed application – is based on an architectural style called REST – Representational State Transfer. REST is neither a standard nor a protocol. It is just an architectural style like say for example client-server architecture (client-server is neither a standard nor a protocol). Web services following this architectural style are said to be RESTful Web services. So what is this REST? According to Roy Fielding who coined this term, â€Å"Representational State Transfer is intended to evoke an image of how a well-designed Web application behaves: Presented with a network of web pages (a virtual state-machine), the user progresses through an application by selecting links (state transitions), resulting in the next page (representing the next state of the application) being transferred to the user and rendered for their use.† In the web, everythi ng is identified by resources. When we type a URL in the browser we are actually requesting a resource present on the server. A representation of the resource (normally a page) is returned to the user which depicts the state of the application. On clicking any other link, the application transfers state with the new representation of the resource. Hence the name Representational State Transfer. REST-style architecture follows this concept and consists of clients and servers. Clients initiate requests to servers; servers process requests and return appropriate responses. Requests and responses are built around the transfer of representations of resources which are identified by URI (Uniform Resource Identifier). RESTful web services are based on HTTP protocol and its methods mainly PUT, GET, POST, and DELETE. These web services are better integrated with HTTP than SOAP-based services are, and as such do not require XML SOAP messages or WSDL service definitions. Because RESTful web services use existing well-known standards (HTTP, XML, URI, MIME) and have a lightweight infrastructure that allows services to be built with minimal tooling, developing RESTful web services is inexpensive and thus has a very low barrier for adoption. RESTful Web Service HTTP methods A RESTful web services is a collection of resources. For example, consider an office has deployed a web services to get a list of employees and to get individual employee data for use with other departments. The web service makes available a URL to a ‘list of employees’ resource. For example, a client would use this URL to get the employee list: http://www.example.com/myoffice/employees On sending a request to that particular URL, the client would receive the following document. |1| | |2|234 | |3|235 | |4|236 | |5|237 | |6| | The above document contains the links to get detailed info about each employee. This is a key feature of REST. The client transfers from one state to the next by examining and choosing from among the alternative URLs in the response document. To get individual employee information, the web service makes available a URL to each employee resource. For example, to get employee information whose id is 237, the client may send a request to the following URL: http://www.example.com/myoffice/employee/237 And the response document containing the employee information may be as follows: |1 | | |2 |237 | |3 |xyz | |4 |abc | |5 |123 ABC St | |6 |3344.56 | |7 | | [pic] We have seen the use of HTTP GET method to get the information. In the same way, we can use the other HTTP methods like POST, PUT and DELETE. The logical meaning of these HTTP methods for the URL http://www.example.com/myoffice/employees is as follows, †¢ When a HTTP POST request is sent to the above URL with an employee data, the data will be added to the employee list. †¢ When a HTTP PUT request is sent to the above URL with a list of employees then the original list will be modified with this employee list. †¢ When a HTTP DELETE request is sent to the above URL then the entire list of employees will be deleted. Similarly for the URL http://www.example.com/myoffice/employee/237 the actions may be interpreted as follows, †¢ When a HTTP POST request is sent to the above URL, treat the addressed member as a collection in its own right and create a new entry in it. o For example consider a situation where the employee works in a particular department and the URL http://www.example.com/myoffice/dept/A1205 represents the list of employees working in department A1205. So a POST request to this URL with employee data will add an employee data to that particular department. †¢ When a HTTP PUT request is sent to the above URL then modify that particular employee with the new request data or create if employee does not exist. †¢ When a HTTP DELETE request is sent to the above URL then delete that particular employee. In this REST form of communication, the service producer and service consumer should have a mutual understanding of the context and content (XML) being passed along. Because there is no WSDL to describe the web services interface, both parties must agree on the schemas that describe the data being exchanged and on ways to process it meaningfully. A RESTful design may be appropriate when, †¢ The web services are completely stateless. †¢ The data that the web service returns is not dynamically generated and can be cached. o The caching infrastructure that web servers provide can be leveraged to improve performance. However, the developer must take care because such caches are limited to HTTP GET method for most servers. †¢ The service producer and service consumer have a mutual understanding of the context and content being passed along. †¢ Bandwidth is particularly important and needs to be limited. o REST is particularly useful for limited-profile devices, such as PDAs and mobile phones, for which the overhead of headers and additional layers of SOAP elements on the XML payload must be restricted. †¢ Web service delivery or aggregation into existing web sites is to be enabled.

Political Control In Han China And Imperial Rome Essay

Han China and Imperial Rome were amazing empires in their own way. Both of these civilizations had ways of maintaining the political control over their people. Han China and Imperial Rome’s method in political control has many differences and similarities, but I believe there are more similarities than differences. Han China’s political control was large. This empire developed a political philosophy called legalism. Legalism advocated clear rules and harsh punishments as means of enforcing the authority of the state. With this new philosophy, Shihuangdi decided to launch a military campaign to reunify China. This empire also believed military force was very important. Han China’s leading figure was an emperor. In their government, religion often took the major role in their society. Han China also had more equality in political control than Imperial Rome. Imperial Rome’s political control was mainly based on social status. For instance wealthy men dominated over women, and poor men. They had a written code of law that offered plebeians (poorer class) protection from abuse. This gave the plebeians an opportunity to shape public policy. Romans took great pride in this, and believed they enjoyed greater freedom than most of their neighbors. They had a rule of law, the rights of citizens, the absences of pretension, upright moral behavior, and keeping ones word. This was later recognized as â€Å"the way of the ancestors.† Once these empires political control were established, they shared many similarities. Both of them worked to unite the empires and create peace among them. They also both believed the gods helped them rule and succeed as an empire. Both of these civilizations also had a custom religion, Christianity in Imperial Rome, and Buddhism in China. Roman and Chinese authorities both had supernatural sanctions to support their rule. Romans began to regard their deceased emperors as gods and made a religious cult. Roman authorities persecuted the refusing Christians that didn’t take part.

Classroom management Research Paper Example | Topics and Well Written Essays - 1000 words

Classroom management - Research Paper Example Interviews conducted with Asian teachers who had migrated to the United States revealed rampant discipline problems inside the classroom. These problems include students arriving late, yawning too loud, sleeping during lectures, bullying, and putting feet up on desks, among others. These classroom discipline problems are not confined to the United States alone, as they are beginning to spring up in the Singaporean school system, where discipline problems have in the past been extremely rare. Previously, discipline problems have existed in schools to a minor extent. However, in the past ten years, survey results show the condition escalating, thereby necessitating the development of new classroom discipline methods in order to keep the focus on learning (Tan & Yuanshan, 1999). Discussion Because all behavioral problems, and bullying in particular, have harmful effects that can undermine the learning process, some sectors suggest that teachers should be strict in implementing school ru les and regulations in order to curtail the persistence of bullying and other disruptive behaviors in the classroom. However, often behavioral problems first arise in the home, and therefore enforcing discipline at school does not address the whole problem. There is also the possibility of teachers misunderstanding the limitations of strict discipline, and abusing the power they have been given by being aggressive and causing physical and verbal abuse. Psychological research shows that children learn best in a safe and supportive environment; therefore, enforcing strict rules may not be the solution to behavioral problems. Instead, a discipline solution should be developed based on the principles of understanding and encouragement. Children need stability and structure; therefore, rules should be made and enforced consistently but fairly. Students must be aware that bullying or any kind of disrespect towards others will not be tolerated, and must be informed of the consequences in a dvance. Teachers can also emphasize team building within the classroom by placing students into groups (or families), thereby encouraging students to be supportive of each other and work together to achieve common goals. Collaborative learning entails utilizing human relationships to promote safety, accomplishment, and mastery (Bruffee, 1999). Others suggest teachers should be equipped with skills to create their own strategies to resolve whatever behavioral problems they may encounter in the classroom. This applies particularly to immigrant teachers. In a study conducted by Oriaro (2007), it was revealed that teachers from Kenya struggled to resolve discipline problems due to a lack of formal training in the area of classroom discipline. These teachers did not necessarily understand their school’s policies and procedures, and tended to rely on their past experience to manage their classroom. However, sometimes past experience is not enough, and specific training must be give n to assist teachers in classroom management skills, although there is no guarantee that such training will eliminate all classroom discipline problems. Teachers must have an intuition about which behavioral

Final Paper Term Example | Topics and Well Written Essays - 4000 words

Final - Term Paper Example Anxiety is one psychological disorder which is reported even from the beginning of recorded human history. In Holy Bible incidents of depression are reported to two prominent personalities; King David and Job. Many people still don’t have much idea about anxiety as a disease since the symptoms of anxiety are visible among even normal people occasionally. Like many of the psychological disorders, both heredity and environment can cause depressive behaviors Anxiety is always caused by negative thoughts and negative energy driven by unpleasant emotions or feelings. Anxiety can be defined as a psychological disorder characterized by cognitive, emotional, and behavioral components. It is driven by low mood and lack of activity. Persons with anxiety disorders may exhibit sadness, hopelessness, helplessness, worthlessness, guilty feeling, restlessness, uneasiness, apprehension, fear, or worry. Anxiety can change the normal conduct of a person and it can be considered as a normal reaction to stress. An 80 year old mother of one of my friends, who is staying near my home, is undergoing treatment currently for anxiety related psychological problems. Lady X (For convenience throughout this paper this lady is referred as ‘Lady X’) was a brave and courageous lady who has faced several problems during her childhood with respect to poverty. She was the second child of a seven member family. She was married to a soldier at an early age of 18. Her husband was busy with his military assignments till 58 years of age and enjoyed only 2 months of his annual holidays with his wife and four children for a prolonged 20 years of his military services. When he retired at the age of 58, he was quiet happy as all the four children were already got employment and his family burdens were considerably reduced. Lady X was the one who brought up her children and worked hard for the wellbeing of their children even though Mr. X assisted her with

Final Research Paper Example | Topics and Well Written Essays - 2000 words

Final - Research Paper Example Economists and social scholars have termed the crash of the financial markets in the United States of America as a self-serving failure on the part of the regulations of the government. There were lapses and loopholes in the fiscal regulation deposed and an unimplemented by the government contributed to the financial crush. At this point and level, it may be needless to stress on the effects and impact of the financial crash since the effects and extent of the crash was felt far and wide. It however did cost the country as a whole to revive the economy such as the banks being forced to give mortgages band loans to people without proper credit worthiness record (Hartmann, Straetmans & Vries, 2004). Analysts and economic observes have raised concerns and issues such to the direction that the extent of the negative effects and consequences of the financial meltdown could have been avoided if there were proper regulations on banks and micro-credit institutions which gave out mortgages. In order to pursue this research to its logical conclusion and end, it would be imperative to gauge the macro and fiscal regulations which would be introduced along government policies to control the effects of the crash. Thus, this paper will delve into the concept and issue of fiscal policies which would be introduced hand in hand with the remedial policies by the United States government to help caution and prevent the economy in going into another financial markets crash. In principle, there are sectors and areas which would prove beneficial to this study so as to arrive at informed inference and recommendation (Hodgson, 2009). They include the policy sectors, the bank regulatory authorities and the financial markets as a whole. Therefore this research and study will seek to explore means and avenues which will caution the economy of

Coursework in financial reporting & corporate governance Essay

Coursework in financial reporting & corporate governance - Essay Example The emergence of the concept of corporate governance can be attributed to certain events in the recent past which have shaken the business world. Accounting frauds such as Arthur Anderson, Enron, Satyam and World Com etc in the last decade resulted in loss of shareholder in the way the companies are governed. These disclosures along with the dot com bust which itself had its own share of corporate mis-governance made people loose confidence in the stock markets and the way that the companies are governed. The resulting market fall along with the tremendous impact on the society (loss of jobs, and damage to customers, and financiers) made it necessary to have a systemic framework which shall define the working of a public listed company. More recently, the financial slowdown of 2008-09 has once again raised concern over the governance of such large organizations. The greed to make profits while ignoring risks involved and the eventual loss to the society has made it necessary to have a strong board of directors which has the complete knowledge of the companys operations, policies and business. In a nutshell, the following reasons can be listed for the growth in importance of Corporate Governance: There have been many steps in setting out the standard for safeguarding the interests of the society and stop the occurrence of happenings like the Enron, Maxwell Communications and so on. Amongst the first one was the Cadbury report titled â€Å"Financial Aspects of Corporate Governance† published in the year 2002 (The Committee on the Financial Aspects of Corporate Governance, 1992). Subsequent standards were set up in the form of OECD Principles of Corporate Governance in the year 1999 and the Guidance on Good Practices in Corporate Governance Disclosure. British Airways (BA) and British Petroleum (BP) are the two large UK plcs that we will be comparing for the purpose of this paper. British

Epicureans Definition of Pleasure Essay Example | Topics and Well Written Essays - 1250 words

Epicureans Definition of Pleasure - Essay Example Hence, Epictetus points out that we possess the capacity to function well in this area knowing that it would not lead to disappointment if we choose to cultivate any of such concerns since these occur spontaneously apart from restraint or external force that is not part of our conscious act. Then because only things within our control are subject to the actions of our choice and we are always in harmony with the willed act, it follows thus that we can bring them to cultivation to become those things that make us live a life of virtue. Epictetus particularly exemplifies â€Å"body, property, reputation, command† as things falling beyond our control and are held in possession by other human beings. This being the case, as we attempt to execute around them, then, we are more likely to acquire frustration for what we cannot control is well within the bounds of abilities employed by others whose thoughts, attitude, and goals in life are necessarily different from ours. The power we hope to apply in this regard is fleeting or temporary for by nature, there would emerge struggles in trying to gain something that bears no certainty toward real success. For instance, we may not attach ourselves fully to a property owned because once it is stolen or given over to destruction at a moment we are less able to keep watch of it, the unfortunate incident is going to cause us inevitable pain from which we would rather cultivate malice or hatred toward suspected individuals. This is chiefly the reason virtuous living cannot possibly be sought after perishable objects that are out of reach of our full control since they are more concrete compared to the immaterial principles that form our identity and beliefs which others can never claim ownership of. What we can control appears to dwell in our inner sense of being so that cultivating it serves a firm grasp of wisdom, and therefore, of virtuosity. (2) What sorts of relationships should we form with other people? How is thi s related to the issue of externals and judgment? Through a Stoic point of view, we ought to establish relationships on the basis of duties that make us recognize the essence of accountability and obligation without having to neglect the nature we seek with freedom. When we relate to others, we must not expect state of affairs that would favor our welfare even if such relations were biological and we could suppose too ideally as to hope for returns that are more than just. Other people are entitled to their own actions and so are we and on this ground, Epictetus encourages us to consider or give thought not about the wicked deed done to us by another person, instead, on the action we should take in order that we can remain disposed to acknowledge the treatment provided by our faculties regarding the person’s response. We have to accept externals as they are in nature for in this manner, we maintain the norm of keeping things settled in place. Here, we may not accuse others of wrongdoing or injustice upon us for whatever they take does not really belong to us and it is in how we prefer to see and judge their deed that brings about misery as long as we consume our energy grieving over losses in life and property that are not our own originally though we admit to having experienced them with frequency. Between a parent and a child, for example as Epictetus notes,