1 files changed, 129 insertions, 0 deletions
diff --git a/common-app-api/src/main/java/org/openecomp/sdc/common/listener/AppContextListener.java b/common-app-api/src/main/java/org/openecomp/sdc/common/listener/AppContextListener.java
new file mode 100644
index 0000000000..3f588e8aa2
--- /dev/null
+++ b/common-app-api/src/main/java/org/openecomp/sdc/common/listener/AppContextListener.java
@@ -0,0 +1,129 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.sdc.common.listener;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.jar.Attributes;
+import java.util.jar.Manifest;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletContextEvent;
+import javax.servlet.ServletContextListener;
+
+import org.openecomp.sdc.common.api.ConfigurationSource;
+import org.openecomp.sdc.common.api.Constants;
+import org.openecomp.sdc.common.impl.ExternalConfiguration;
+import org.openecomp.sdc.common.impl.FSConfigurationSource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+
+public class AppContextListener implements ServletContextListener {
+
+	private static Logger log = LoggerFactory.getLogger(AppContextListener.class.getName());
+
+	public void contextInitialized(ServletContextEvent context) {
+
+		log.debug("ServletContextListener initialized ");
+
+		log.debug("After read values from Manifest {}", getManifestInfo(context.getServletContext()));
+
+		Map<String, String> manifestAttr = getManifestInfo(context.getServletContext());
+
+		String appName = setAndGetAttributeInContext(context, manifestAttr, Constants.APPLICATION_NAME);
+		String appVersion = setAndGetAttributeInContext(context, manifestAttr, Constants.APPLICATION_VERSION);
+
+		ExternalConfiguration.setAppName(appName);
+		ExternalConfiguration.setAppVersion(appVersion);
+		String configHome = System.getProperty(Constants.CONFIG_HOME);
+		ExternalConfiguration.setConfigDir(configHome);
+
+		String appConfigDir = configHome + File.separator + appName;
+		// ChangeListener changeListener = new ChangeListener();
+		ConfigurationSource configurationSource = new FSConfigurationSource(ExternalConfiguration.getChangeListener(), appConfigDir);
+
+		context.getServletContext().setAttribute(Constants.CONFIGURATION_SOURCE_ATTR, configurationSource);
+
+		ExternalConfiguration.setConfigurationSource(configurationSource);
+
+		ExternalConfiguration.listenForChanges();
+
+	}
+
+	public void contextDestroyed(ServletContextEvent context) {
+
+		log.debug("ServletContextListener destroyed");
+		ExternalConfiguration.stopListenForFileChanges();
+	}
+
+	private String setAndGetAttributeInContext(ServletContextEvent context, Map<String, String> manifestAttr, String attr) {
+
+		String name = manifestAttr.get(attr);
+		if (name != null) {
+			context.getServletContext().setAttribute(attr, name);
+		}
+
+		return name;
+	}
+
+	public static Map<String, String> getManifestInfo(ServletContext application) {
+
+		Map<String, String> result = new HashMap<String, String>();
+		InputStream inputStream = null;
+		try {
+
+			inputStream = application.getResourceAsStream("/META-INF/MANIFEST.MF");
+
+			Manifest manifest = new Manifest(inputStream);
+
+			Attributes attr = manifest.getMainAttributes();
+			String name = attr.getValue("Implementation-Title");
+			if (name != null) {
+				result.put(Constants.APPLICATION_NAME, name);
+			}
+
+			String version = attr.getValue("Implementation-Version");
+			if (version != null) {
+				result.put(Constants.APPLICATION_VERSION, version);
+			}
+
+		} catch (IOException e) {
+
+		} finally {
+			if (inputStream != null) {
+				try {
+					inputStream.close();
+				} catch (IOException e) {
+					// TODO Auto-generated catch block
+					e.printStackTrace();
+				}
+			}
+		}
+
+		return result;
+
+	}
+
+}