{"id":364,"date":"2018-07-27T11:05:06","date_gmt":"2018-07-27T11:05:06","guid":{"rendered":"http:\/\/csp12.epgpbooks.inflibnet.ac.in\/?post_type=chapter&p=364"},"modified":"2018-08-02T08:54:48","modified_gmt":"2018-08-02T08:54:48","slug":"web-services-ii","status":"publish","type":"chapter","link":"https:\/\/ebooks.inflibnet.ac.in\/csp12\/chapter\/web-services-ii\/","title":{"rendered":"WEB SERVICES -II"},"content":{"raw":"Learning Objectives<\/strong>\r\n\r\n \r\n

In the previous module, we have studied about the basics of webservice, components of web service, architecture of web services and applications of web services. In this module, we are going to learn how to create a new web service and how to deploy it using NETBEANS IDE.Also, consumption of web services in different modes is going to be learnt.<\/p>\r\n\r\n

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  1. WEB SERVICE CREATION<\/strong><\/li>\r\n<\/ol>\r\n

    \u00a0 \u00a0 Here, we are going to see how to create a web service in Java using NetBeans IDE using GlassFish 4.0 specifications.<\/p>\r\n \r\n\r\n1.1 Creating a Web Service in Java using NetBeans IDE<\/strong>\r\n\r\n \r\n\r\nThe step-by-step instructions to create and deploy a web service in Java using NetBeans\r\n\r\nIDE and GlassFish 4.0 are as follows:\r\n\r\n \r\n

    Prerequistites for creating the web service is the requirement of NetBeans 8.0 IDE which can be downloaded from https:\/\/netbeans.org\/downloads\/ - Link.<\/p>\r\n \r\n

    Step 1:<\/strong>To create a Java based web service, open NetBeans IDE and click on New Project and choose Java Web -> Web Application as shown in Figure 1. Enter the Project Name as CalculationWS, use the default settings and then click on \u201cFinish\u201d. Now the server required for the web service need to be selected and the server chosen here Glass Fish server with Java EE 7 Web version as shown in Figure 2.Now a new Project has been created using these settings.<\/p>\r\n \r\n

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    Figure 1. Creation of a Web Application<\/p>\r\n

    \"\"<\/p>\r\n \r\n\r\nStep 2: Create a Web Service<\/strong>\r\n\r\n \r\n

    Once the project has been created, now we are supposed to create a web service. For that, go to the Project Tree Structure displayed on the left side of the window. Right click on the project and select \u201cNew\u201d and then choose \u201cWeb Service\u201d as shown in Figure 3.<\/p>\r\n \r\n

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    Figure 3. Creation of Web service<\/strong><\/p>\r\n \r\n\r\n \r\n

    Specify web service name as \u201cCalWS\u201d and package name as \u201cCalculationWS\u201d as indicated in Figure 4. Click on \u201cFinish\u201d to create a new web service.<\/p>\r\n \r\n

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    Figure 4. Naming of new Web Service<\/strong><\/p>\r\n \r\n

    Once the web service creation is over, the next step is to create a method over it which can act on the web service created. Once you open the CalWS in the editor, you will get a skeleton code. Inside the skeleton code, you can enter the code as per your requirement. According to this project, in CalWS.java file, the original hello() function has been replaced with the following code:<\/p>\r\n \r\n\r\n@WebMethod(operationName = \"Add\")\r\n\r\npublic String Add(@WebParam(name = \"value1\") String value1,@WebParam(name = \"value2\") String value2 ) {\r\n\r\nfloat value=Float.valueOf(value1)+Float.valueOf(value2); return (Float.toString(value));\r\n\r\n}\r\n\r\n \r\n

    Here, @Web method corresponds to the method of web service, @WebParam corrersponds to the parameters passed to the method with two string arguments. In this code, value of two floating point numbers has been added and a string equivalent of that value has been returned. Now the web service method has been created.<\/span><\/p>\r\n\r\n<\/div>\r\n

    \u00a0 Step 3: <\/strong>Deploy and Test Web Service by choosing Projects->CalculationWS->Deploy. Right click on the project and select \u201cDeploy\u201d as shown in Figure 5.<\/p>\r\n \r\n

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    This is to deploy all the web services in this project. Once the web service has been deployed, you will get a message that, \u201cweb service deployed successfully\u201d. To test the web service, right click on the service and select \u201cTest Web Service\u201d. Again, Right click on the project and select \u201cclean and build\u201d, a war file will be automatically generated under the \u201cdist\u201d directory as shown in Figure 6.<\/p>\r\n \r\n

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    Once tested, tester page will be displayed as shown in Figure 7, type two numbers in the tester page and deploy it using glassfish server. The sum of the two numbers will be displayed as shown in the figure 8.<\/p>\r\n \r\n

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    \r\n\r\n\u00a0 2.\u00a0<\/strong>CONSUMING THE WEB SERVICE<\/strong>\r\n\r\n \r\n

    After the creation of web service, some client applications need to get developed inorder to consume the web services. The web service can be consumed by creating a client application using anyone of the following ways:<\/p>\r\n\r\n