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/*-
* ============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 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.openecomp.sdc.common.log.wrappers.Logger;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
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;
public class AppContextListener implements ServletContextListener {
private static Logger log = Logger.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<>();
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) {
log.info("close FileOutputStream failed - {}", e);
}
}
}
return result;
}
}
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