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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.be.listen;
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.apache.commons.io.filefilter.FileFilterUtils;
import org.apache.commons.io.filefilter.IOFileFilter;
import org.apache.commons.io.monitor.FileAlterationListenerAdaptor;
import org.apache.commons.io.monitor.FileAlterationMonitor;
import org.apache.commons.io.monitor.FileAlterationObserver;
import org.openecomp.sdc.be.config.ConfigurationManager;
import org.openecomp.sdc.be.impl.WebAppContextWrapper;
import org.openecomp.sdc.be.monitoring.BeMonitoringService;
import org.openecomp.sdc.common.api.Constants;
import org.openecomp.sdc.common.impl.ExternalConfiguration;
import org.openecomp.sdc.common.listener.AppContextListener;
import org.openecomp.sdc.common.log.wrappers.Logger;
public class BEAppContextListener extends AppContextListener implements ServletContextListener {
private static final String MANIFEST_FILE_NAME = "/META-INF/MANIFEST.MF";
private static final Logger log = Logger.getLogger(BEAppContextListener.class);
public void contextInitialized(ServletContextEvent context) {
super.contextInitialized(context);
ConfigurationManager configurationManager = new ConfigurationManager(ExternalConfiguration.getConfigurationSource());
log.debug("loading configuration from configDir: {} appName: {}", ExternalConfiguration.getConfigDir(), ExternalConfiguration.getAppName());
context.getServletContext().setAttribute(Constants.CONFIGURATION_MANAGER_ATTR, configurationManager);
WebAppContextWrapper webAppContextWrapper = new WebAppContextWrapper();
context.getServletContext().setAttribute(Constants.WEB_APPLICATION_CONTEXT_WRAPPER_ATTR, webAppContextWrapper);
context.getServletContext().setAttribute(Constants.ASDC_RELEASE_VERSION_ATTR, getVersionFromManifest(context));
// Monitoring service
BeMonitoringService bms = new BeMonitoringService(context.getServletContext());
bms.start(configurationManager.getConfiguration().getSystemMonitoring().getProbeIntervalInSeconds(15));
initTlsFileMonitoring();
log.debug("After executing {}", this.getClass());
}
private String getVersionFromManifest(ServletContextEvent context) {
ServletContext servletContext = context.getServletContext();
InputStream inputStream = servletContext.getResourceAsStream(MANIFEST_FILE_NAME);
String version = null;
try {
Manifest mf = new Manifest(inputStream);
Attributes atts = mf.getMainAttributes();
version = atts.getValue(Constants.ASDC_RELEASE_VERSION_ATTR);
if (version == null || version.isEmpty()) {
log.warn("failed to read ASDC version from MANIFEST.");
} else {
log.info("ASDC version from MANIFEST is {}", version);
}
} catch (IOException e) {
log.warn("failed to read ASDC version from MANIFEST", e);
}
return version;
}
private void initTlsFileMonitoring() {
final Map<String, IOFileFilter> tlsFileFilters = createTlsFileFilters();
if (!tlsFileFilters.isEmpty()) {
final TlsFileChangeHandler tlsFileChangeHandler = new TlsFileChangeHandler();
tlsFileFilters.entrySet().stream().forEach(entry -> listenForChanges(entry.getKey(), tlsFileChangeHandler, entry.getValue()));
}
}
private Map<String, IOFileFilter> createTlsFileFilters() {
final Map<String, IOFileFilter> filters = new HashMap<>();
addFilter(filters, ConfigurationManager.getConfigurationManager().getConfiguration().getTlsCert());
addFilter(filters, ConfigurationManager.getConfigurationManager().getConfiguration().getTlsKey());
addFilter(filters, ConfigurationManager.getConfigurationManager().getConfiguration().getCaCert());
return filters;
}
private void addFilter(final Map<String, IOFileFilter> filters, final String path) {
if (path != null) {
final File file = new File(path);
final IOFileFilter caCertFileFilter =
FileFilterUtils.and(FileFilterUtils.fileFileFilter(), FileFilterUtils.nameFileFilter(file.getName()));
if (filters.containsKey(file.getParent())) {
filters.put(file.getParent(), FileFilterUtils.or(filters.get(file.getParent()), caCertFileFilter));
} else {
filters.put(file.getParent(), caCertFileFilter);
}
}
}
private void listenForChanges(String path, FileAlterationListenerAdaptor changeListener, IOFileFilter ioFileFilter) {
FileAlterationMonitor monitor = new FileAlterationMonitor();
final FileAlterationObserver observer = new FileAlterationObserver(path, ioFileFilter);
observer.addListener(changeListener);
monitor.addObserver(observer);
try {
monitor.start();
} catch (final Exception exception) {
log.error("Error starting monitoring of TLS files", exception);
}
}
}
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