session listener initial work
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9d37cea5b2
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33cc1f297a
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<?xml version="1.0" encoding="UTF-8"?>
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<?xml version="1.0" encoding="UTF-8"?>
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<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
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xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
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xsi:schemaLocation="
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xsi:schemaLocation="
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http://java.sun.com/xml/ns/javaee
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http://java.sun.com/xml/ns/javaee
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http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
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http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
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id="WebApp_ID" version="3.0">
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<display-name>Spring MVC XML Application</display-name>
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<display-name>Spring MVC XML Application</display-name>
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@ -40,7 +38,6 @@
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<session-config>
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<session-config>
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<session-timeout>10</session-timeout>
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<session-timeout>10</session-timeout>
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</session-config>
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</session-config>
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<welcome-file-list>
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<welcome-file-list>
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<welcome-file>index.html</welcome-file>
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<welcome-file>index.html</welcome-file>
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</welcome-file-list>
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</welcome-file-list>
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package org.baeldung.web;
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import javax.servlet.http.HttpSessionEvent;
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import javax.servlet.http.HttpSessionListener;
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public class SessionListenerWithMetrics implements HttpSessionListener {
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private static int totalActiveSessions;
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public SessionListenerWithMetrics() {
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super();
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}
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// API
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public static int getTotalActiveSession() {
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return totalActiveSessions;
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}
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@Override
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public void sessionCreated(final HttpSessionEvent arg0) {
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totalActiveSessions++;
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System.out.println("sessionCreated - add one session into counter");
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}
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@Override
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public void sessionDestroyed(final HttpSessionEvent arg0) {
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totalActiveSessions--;
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System.out.println("sessionDestroyed - deduct one session from counter");
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}
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}
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@ -1,16 +1,17 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<?xml version="1.0" encoding="UTF-8"?>
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<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
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xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
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xsi:schemaLocation="
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xsi:schemaLocation="
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http://java.sun.com/xml/ns/javaee
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http://java.sun.com/xml/ns/javaee
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http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
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http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
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id="WebApp_ID" version="3.0">
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<display-name>Spring MVC Custom Application</display-name>
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<display-name>Spring MVC Custom Application</display-name>
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<session-config>
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<session-config>
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<session-timeout>1</session-timeout>
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<session-timeout>1</session-timeout>
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</session-config>
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</session-config>
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<listener>
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<listener-class>org.baeldung.web.SessionListenerWithMetrics</listener-class>
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</listener>
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<!-- Spring root -->
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<!-- Spring root -->
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<context-param>
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<context-param>
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