Crowd : Getting all users removing duplicates in an application using Crowd REST java client

1. //your crowd server settings
2. String url = "http://auth.staging.company.com/crowd/";//crowd base url
3. String applicationName = "appincrowd";
4. String applicationPass = "apppassword";
5. String groupName = "usergroup";//a user group under the app
6. CrowdClient client = new RestCrowdClientFactory().newInstance(url, applicationName, applicationPass);
7. //initialze crowd client

1. //a single user can be more than one group,so let's remove duplicate users by using Set
2.         Set<CrowdUser> allCrowdUsers = new HashSet<>();
3.         List<String> newGroupList = client.searchGroupNames(NullRestrictionImpl.INSTANCE, 0, maxGroupSearchResult);
5.         //get all users in a single list
6.         for (String currGroupName : newGroupList) {
7.             List<User> currGroupUsers = client.getUsersOfGroup(currGroupName, 0, maxUserSearchResult);
8.             for (User grpUser : currGroupUsers) {
9.                 allCrowdUsers.add(new CrowdUser(grpUser));
10.             }
11.         }
13.         //traverse the all users list
14.         for (User usr : allCrowdUsers) {
15.             System.out.println(usr.getName() + " " + usr.getFirstName() + " " + usr.getLastName() + " (" + usr.getEmailAddress() + ")");
17.         }

Output:

1. //john cooper (cooper@company.com)
2. //sam peters (sam@company.com)
3. //...............................
4. //Istiak Ahmad (iask@company.com)

Extended crowd user class:

CrowdUser.java:

1. import com.atlassian.crowd.model.user.User;
2. import com.atlassian.crowd.model.user.UserTemplate;
4. /**
5. *Extend user with overridden equals() and hashCode() method according to user email address so that we can build a collection(Set<>) with no different users with same email address
6. *
7. */
8. public class CrowdUser extends UserTemplate {
10.     public CrowdUser(User user) {
11.         super(user);
12.     }
13.     /**
14.      compare only user email address
15.      */
16.     @Override
17.     public boolean equals(Object object) {
18.         boolean result = false;
19.         if (object == null || object.getClass() != getClass()) {
20.             result = false;
21.         } else {
22.             CrowdUser muser = (CrowdUser) object;
23.             if (this.getEmailAddress().compareTo(muser.getEmailAddress()) == 0) {
24.                 result = true;
25.             }
26.         }
27.         return result;
28.     }
30.     // only email address
31.     @Override
32.     public int hashCode() {
34.         return this.getEmailAddress().hashCode();
35.     }
37.     
38. }

Running maven web project with maven tomcat7 plugin

With maven tomcat7 plugin you won't have download,install and configure Tomcat server seperately.Maven can do it for you.Just run:
mvn tomcat7:run
with a tomcat7 maven plugin enabled project and browse to localhost:port/path
In your pom.xml simply put this plugin:

1. <plugin>
2. <groupId>org.apache.tomcat.maven</groupId>
3. <artifactId>tomcat7-maven-plugin</artifactId>
4. <version>2.0</version>
5. <configuration>
6. <server>tomcat-development-server</server>
7. <port>9966</port> <!--make sure port doesnt conflict with others -->
8. <path>/SpringMVC</path><!--http://localhost:9966/SpringMVC/ -->
9. </configuration>
10. </plugin>

Example spring maven hello world web project pom.xml:

1. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
2.      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
3.     <modelVersion>4.0.0</modelVersion>
4.     <groupId>com.mohi</groupId>
5.     <artifactId>SpringMVC</artifactId>
6.     <packaging>war</packaging>
7.     <version>1.0-SNAPSHOT</version>
8.     <name>SpringMVC Maven Webapp</name>
9.     <url>http://maven.apache.org</url>
11.     <dependencies>
13.         <dependency>
14.             <groupId>org.springframework</groupId>
15.             <artifactId>spring-webmvc</artifactId>
16.             <version>4.0.3.RELEASE</version>
17.         </dependency>
18.     </dependencies>
20.     <build>
22.         <plugins>
23.             <plugin>
24.                 <groupId>org.apache.maven.plugins</groupId>
25.                 <artifactId>maven-compiler-plugin</artifactId>
26.                 <version>2.3.2</version>
28.             </plugin>
31.             <plugin>
32.                 <groupId>org.apache.tomcat.maven</groupId>
33.                 <artifactId>tomcat7-maven-plugin</artifactId>
34.                 <version>2.0</version>
35.                 <configuration>
36.                     <server>tomcat-development-server</server>
37.                     <port>9966</port>
38.                     <path>/SpringMVC</path>
39.                 </configuration>
40.             </plugin>
41.         </plugins>
42.     </build>
45. </project>

Sample code:

Here is a Spring Helloworld maven with tomcat7 plugin example project SpringHelloworldMavenTomcat7PluginExample.zip

Download ,unzip and run:

mvn clean install tomcat7:run

Browse to localhost:9966/SpringMVC/welcome

JSP Custom Tag Working Example

To write your own jsp tag:
Create a HelloTag class that extends SimpleTagSupport class.
Example:

1. import javax.servlet.jsp.tagext.*;
2. import javax.servlet.jsp.*;
3. import java.io.*;
5. public class HelloTag extends SimpleTagSupport {
7. private String message;
9. public void setMessage(String msg) {
10. this.message = msg;
11. }
13. StringWriter sw = new StringWriter();
15. public void doTag()
16. throws JspException, IOException
17. {
18. if (message != null) {
19. /* Use message from attribute */
20. JspWriter out = getJspContext().getOut();
21. out.println( message );
22. }
23. else {
24.      System.out.println("msg is null");
25. /* use message from the body */
26. getJspBody().invoke(sw);
27. getJspContext().getOut().println(sw.toString());
28. }
29. }
31. }

Now create a  custom .tld file:
custom.tld:
-----------

1. <?xml version="1.0" encoding="UTF-8"?>
2. <!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN" "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
4. <taglib>
5. <tlib-version>1.0</tlib-version>
6. <jsp-version>2.0</jsp-version>
7. <short-name>Example TLD with Body</short-name>
8. <tag>
9. <name>Hello</name>
10. <tag-class>com.mohi.HelloTag</tag-class>
11. <body-content>scriptless</body-content>
12. <attribute>
13. <name>message</name>
14. </attribute>
15. </tag>
16. </taglib>

Usage:

Put the definitio on the top of your jsp page:

1. <%@ taglib prefix="ex" uri="../custom.tld"%>//be aware of the path you are using it's relative!

Using your tag in jsp page body:

1. <ex:Hello message="This is custom tag" />

Sample code:

Download JSPCustomTagExamplecode.zip
Unzip and run:
mvn clean install tomcat7:run
Browse to http://localhost:8080/SpringMVC/welcome

Spring HTML email example

Download spring html email example code from https://github.com/ahmedmohiduet/SpringHTMLEmailExample/

Unzip and run mvn clean install
Navigate to Spring-Mail.xml in src/main/resources folder.
Set your gmail email and password like this:

1. <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
2. <property name="host" value="smtp.gmail.com" />
3. <property name="port" value="587" />
4. <property name="username" value="yourgmailaddress@gmail.com" />
5. <property name="password" value="gmailpassword" />
6. <property name="javaMailProperties">
7. <props>
8. <prop key="mail.smtp.auth">true</prop>
9. <prop key="mail.smtp.starttls.enable">true</prop>
10. </props>
11. </property>
12. </bean>

Navigate to  src/main/java/com/mohi/common and run App.java:
A look of the email bean:

1. public class HTMLMail
2. {
3.     private JavaMailSender mailSender;
4.     public void setMailSender(JavaMailSender mailSender) {
5.         this.mailSender = mailSender;
6.     }
7.     public void sendMail(String from, String to, String subject, String msg) {
8.         try {
9.             MimeMessage message = mailSender.createMimeMessage();
10.             message.setSubject(subject);
11.             MimeMessageHelper helper;
12.             helper = new MimeMessageHelper(message, true);
13.             helper.setFrom(from);
14.             helper.setTo(to);
15.             helper.setText(msg, true);
16.             mailSender.send(message);
17.         } catch (MessagingException ex) {
18.             Logger.getLogger(HTMLMail.class.getName()).log(Level.SEVERE, null, ex);
19.         }
20.     }
21. }