From c4ba0875129568d71abcfe0633c0276cfe42668c Mon Sep 17 00:00:00 2001
From: francesco <francesco@pc-francesco>
Date: Tue, 20 Oct 2020 17:41:44 +0200
Subject: [PATCH] added session listener

---
 .../UploadedFileHttpSessionListener.java      | 54 +++++++++++++++++++
 src/main/webapp/WEB-INF/web.xml               | 12 +++--
 2 files changed, 62 insertions(+), 4 deletions(-)
 create mode 100644 src/main/java/org/gcube/portlets/widgets/mpformbuilder/server/UploadedFileHttpSessionListener.java

diff --git a/src/main/java/org/gcube/portlets/widgets/mpformbuilder/server/UploadedFileHttpSessionListener.java b/src/main/java/org/gcube/portlets/widgets/mpformbuilder/server/UploadedFileHttpSessionListener.java
new file mode 100644
index 0000000..49f8648
--- /dev/null
+++ b/src/main/java/org/gcube/portlets/widgets/mpformbuilder/server/UploadedFileHttpSessionListener.java
@@ -0,0 +1,54 @@
+package org.gcube.portlets.widgets.mpformbuilder.server;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.util.List;
+
+import javax.servlet.annotation.WebListener;
+import javax.servlet.http.HttpSession;
+import javax.servlet.http.HttpSessionEvent;
+import javax.servlet.http.HttpSessionListener;
+
+import org.gcube.portlets.widgets.mpformbuilder.client.ConstantsMPFormBuilder;
+import org.gcube.portlets.widgets.mpformbuilder.shared.upload.FileUploaded;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+@WebListener
+public class UploadedFileHttpSessionListener implements HttpSessionListener {
+
+	private static final Logger LOG = LoggerFactory.getLogger(UploadedFileHttpSessionListener.class);
+	
+	@Override
+	public void sessionDestroyed(HttpSessionEvent event) {
+		LOG.info("sessionDestroyed called. Session id is: "+event.getSession().getId());
+		
+		try {
+			HttpSession httpSession = event.getSession();
+			List<FileUploaded> listFileUploaded = (List<FileUploaded>) httpSession.getAttribute(ConstantsMPFormBuilder.FILE_UPLOADED_SESSION_ATTR);
+			if(listFileUploaded!=null) {
+				LOG.info("found file uploded in session, removin it");
+				for (FileUploaded fileUploaded : listFileUploaded) {
+					try {
+						File file = new File(fileUploaded.getTempSystemPath());
+						boolean result = Files.deleteIfExists(file.toPath());
+						LOG.info("File "+fileUploaded.getTempSystemPath() +" deleted? "+result);
+					}catch (Exception e) {
+						LOG.warn("Error on deleting file: "+fileUploaded, e);
+					}
+				}
+			}
+		}catch (Exception e) {
+			LOG.warn("Error tryng to delete uploaded file", e);
+		}
+		
+	}
+
+	@Override
+	public void sessionCreated(HttpSessionEvent arg0) {
+		LOG.info("sessionCreated called. Session id is: "+arg0.getSession().getId());
+		
+		//session.setMaxInactiveInterval(5);//in seconds
+
+	}
+}
diff --git a/src/main/webapp/WEB-INF/web.xml b/src/main/webapp/WEB-INF/web.xml
index 96b0767..f997444 100644
--- a/src/main/webapp/WEB-INF/web.xml
+++ b/src/main/webapp/WEB-INF/web.xml
@@ -1,9 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE web-app
-    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
-    "http://java.sun.com/dtd/web-app_2_3.dtd">
+<web-app xmlns="http://java.sun.com/xml/ns/javaee"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
+          http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
+	version="3.0">
 
-<web-app>
+	<listener>
+		<listener-class>org.gcube.portlets.widgets.mpformbuilder.server.UploadedFileHttpSessionListener</listener-class>
+	</listener>
 
 	<!-- Servlets -->
 	<servlet>