Использование параметров в веб-приложениях SAP / Parameters in Java SAP Apps

В приложениях EAR или Web Dynpro Java можно использовать файл параметров. Необходимо:

• В вашем EAR или Web Dynpro Java приложении найти папку «META-INF» и в ней создать файл с имененм: «sap.application.global.properties».
• Внутри файла написать параметры вида:

·         # SAP application properties

·         #? onlinemodifiable = true

·         #% type = STRING

·         User=

·         #? onlinemodifiable = true; secure = true

·         #% type = STRING

·         Password=

• Данный настройки появляются в nwa – Java System Properties – вкладка Applications – ищем свое приложение, выбираем его и видим наши property.
• Для получения значений параметров из Java кода пишем следующее:

·         InitialContext context = new InitialContext();

·         Object lookup = context.lookup("ApplicationConfiguration");

·         Properties properties = ((ApplicationPropertiesAccess) lookup).getApplicationProperties();              

·         String url = properties.getProperty("User");

Create Pop-up window in Web Dynpro Java

Create Pop-up window in Web Dynpro Java.

IWDWindowInfo winInfo =
(IWDWindowInfo) wdComponentAPI.getComponentInfo().findInWindows("Window");
IWDWindow window = wdComponentAPI.getWindowManager().createModalWindow(winInfo);
window.setTitle("Title");
window.show();

Error: The generator table >>TMP_SEQUENCE<< does not exist

Problem:
The generator table >>TMP_SEQUENCE<< does not exist.

Situation:
I have had this error on SAP Enterprise Portal 7.3 when I tried to create entity for table.

Solutin:
You should create table TMP_SEQUENCE with fields:
GEN_KEY (VARCHAR(128), primary key)
GEN_VALUE (BIGINT or INTEGER)

Url to SAP Portal Application Module

Hello.

If you have portal application "test.app", vendor "com.blog" and portal module with name "MyApp".

Your URL to portal module will be:
/irj/servlet/prt/portal/prtroot/com~blog~test~app.MyApp.

How to get server host via java code

To get server host use:

InetAddress.getLocalHost().getHostName();

How to get Request object and Response object in Web Dynpro Java

You can get Request and Response object in Web Dynpro Java using this:

IWDProtocolAdapter adapter = WDProtocolAdapter.getProtocolAdapter();

HttpServletRequest request =
                                    (HttpServletRequest) adapter.getRequestObject().getProtocolRequest();

HttpServletResponse response =
                                    (HttpServletResponse) adapter.getResponseObject().getProtocolResponse();

How to call web service from java code example (How to generate proxy java class)

How to call web service from java code from standalone application, from Java Bean or from Servlet.

We have two ways:

• For Java Bean or Servlet we use Eclipse (NWDS) to generate Java Class Client - Proxy Class.
• For standalone (desktop) we use SAAJ - SOAP with Attachments API for Java.

Generate web-service client (Proxy Class) in Eclipse:

1. Create EJB Module project in Eclipse (NWDS)
2. Create Enterprise Application project in Eclipse (NWDS)
3. Import here web-service WSDL
4. Right click on WSDL -> Web Services -> Generate Client
5. In pop-up window move slider to "Develop client" level. Check that "client project" and "EAR project" is yours. Go to next and then push finish.
6. Eclipse has created package which contains your Proxy Class for your web-service. It's name looks like "<NameOfYourWebService> + Service" - remember that class.
7. If you want to call web-service from Java Bean go to 8 step, if from servlet go to 9 step. 
8. Create Session Java Bean. In your Java Bean create parameter "webService" with type of your proxy class ( it's name "<NameOfYourWebService> + Service" - remember? ). Over that parameter specify "@WebServiceRef" annotation and set: "name=<NameOfYourWebService> + Service".
9. Create Servlet. In your Servlet create parameter "webService" with type of your proxy class ( it's name "<NameOfYourWebService> + Service" - remember? ). Over that parameter specify "@WebServiceRef" annotation and set "name=<NameOfYourWebService> + Service".
10. Now if you want call web-service from Servlet, J2EE engine will initialize our parameter "webService" with proxy class when it will be initialized. If you want call web-service from another Java Bean, you can use JNDI to get initialized proxy class. Do that like this: javax.naming.InitialContext.doLookup("<Java Bean JNDI Name of your Java Bean>");
11. In Java Bean or Servlet create method where you want to call web-service.
12. In parameter "webService" you have method "get + <NameOfYourWebService> + Port". Call that and you will get your web-service object. This object contains all operations of your web-service. Use it!

Call web-service from standalone application (desktop) using SAAJ:

We will create SOAP message, using SAAJ, and then we will call web service.

1. Create SOAP message:

If you have web service operation getName and this operation has input structure like this:

<user>
  <userId>1</userId>
</user>

Then we will create SOAPMessage like this:

MessageFactory mf = MessageFactory.newInstance();
SOAPMessage msg = mf.createMessage();

SOAPPart soapPart = msg.getSOAPPart();
SOAPEnvelope envelope = soapPart.getEnvelope();
SOAPBody body = envelope.getBody();

//create structure like our web service operation input
SOAPElement bodyElement = body.addBodyElement(envelope.createName(
"<web service operation name - getName>", "<prefix, I use 'ns1'>", "<uri, it is property 'targetNamespace' in annotation '@WebService' in your web service java class>"));
SOAPElement nodeUser = bodyElement.addChild("user");
SOAPElement nextNode = nodeUser.addChildElement("userId").addTextNode("1");

//if you should make authorization do this
MimeHeaders headers = msg.getMimeHeaders();
String upas = "login" + ":" + "password";
String auth = "Basic " + new String(javax.xml.bind.DatatypeConverter.printBase64Binary(upas.getBytes()));
headers.addHeaders("Authorization", new String(auth.getBytes()));

2. Now we can call web service with our SOAPMessage

URL url = new URL("<url to web service wsdl without '?wsdl', or url in web service wsdl in node 'address' in property 'location'>");

SOAPConnectionFactory cf = SOAPConnectionFactory.newInstance();
SOAPConnection conn = cf.createConnection();
//here we call web service by java code
SOAPMessage replay = conn.call(msg, url);// replay contains web service response
conn.close();

Automated testing in SAP Portal

If you want to test you web application or web-service, you can use JUnitEE to make automated testing.

- create you application, and java classes in there

- create WebModule Project and EAR project for that

- create External Library project and add there junit.jar and junitee.jar

- add dependency from WebModule and EAR project to external library project. After that you can use JUnit API in your WebModule project

- create Java Class in WebModule project and extend it from abstract class junit.framework.TestCase

- create methods in that class to make tests and write everything like it is simple JUnit test

- in WebModule project in folder WEB-INF edit or create if not exist web.xml file

- in that file write this:

  <servlet>
      <servlet-name>UnitTestServlet</servlet-name>
      <servlet-class>org.junitee.servlet.JUnitEEServlet</servlet-class>
  </servlet>

  <servlet-mapping>
      <servlet-name>UnitTestServlet</servlet-name>
      <url-pattern>/UnitTestServlet/*</url-pattern>
  </servlet-mapping>

- in folder WEB-INF create file with name "testCase.txt" and write in that file full class name which contains your tests (which extended from junit.framework.TestCase)

- deploy EAR and external library project on your AS 

- use link  <host>:<port>/<vendor>~<WebModule project name>/UnitTestServlet to see your tests. For example if vendor name is demo.sap.com and WebModule project name is junit/frmw than url will be:  <host>:<port>/demo.sap.com~junit~frmw/UnitTestServlet

Использование Destination API на SAP Portal

Что бы использовать Destination API необходимо:

Подключить из компонента ENGFACADE следующие библиотеки:
tc/bl/exception/lib
tc/bl/security/destination/api
tc/bl/security/lib

Переменные и методы в Eclipse не подсвечиваются / Variables and methods do not highlight

Если в Eclips не выделяются переменные, методы, классы, константы и т.д., то необходимо:

Window -> Preferences -> Java -> Editor -> Mark Occurrences - поставить галочку напротив Mark Occurences

---------------------------------------------------------------------------------------------------------------------

If variables, methods do not highlight in Eclipse do this:

Window -> Preferences -> Java -> Editor -> Mark Occurrences

Regexp for checking email string

To check your email with regular expression do that:

String pattern = "[a-zA-Z0-9-_.]+@[a-zA-Z0-9-_.]+\\.[a-zA-Z]{2,4};
System.out.println(Pattern.matches(pattern, "ваша email");

Регулярное выражения для проверки почтового адреса - email

Для того что бы проврить корректность почтового адреса - email сделайте следующее:

String pattern = "[a-zA-Z0-9-_.]+@[a-zA-Z0-9-_.]+\\.[a-zA-Z]{2,4};
System.out.println(Pattern.matches(pattern, "ваша email");

Данное выражение проверяет, что строка содержит перед собакой буквы латиницы большие и маленькие, цифры от 0 до 9, тире, нижнее подчеркивание и точку. Далее проверяется наличие собаки в строке. Далее делаются теже проверки что и вначале. Далее проверяется что строка оканчивается на точку и после очки могут быть латинские буквы большие и маленьки в количестве от 2 до 4.

Java concole вывод русских букв

Для того что бы вывести русские буквы в консоль при выполнении java программы в Windows нужно:
- Зайти в консоль(cmd);
- В самом верху на синей полоске правой кнопкой мыши и выбрать свойства;
- На вкладке шрифт выбрать Lucida Console;
- Выполнить команду 'chcp 1251' в консоли;
- Готово;

Regular expression to delete or remove special characters from some string:

Regular expression to delete or remove special characters from some string:
String regexp = [^a-zA-Zа-яА-Я0-9 ]
Sys.out("какая либо строка".replaceAll(regexp, "");

Регулярное выражения для удаления специальных или посторонних символов

Регулярное выражения для удаления специальных или посторонних символов:
String regexp = [^a-zA-Zа-яА-Я0-9 ]
Sys.out("какая либо строка".replaceAll(regexp, "");