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/*-
* ============LICENSE_START=======================================================
* ONAP : CCSDK
* ================================================================================
* 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.onap.ccsdk.sli.core.slipluginutils;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Optional;
import java.util.Properties;
import java.util.Vector;
import org.onap.ccsdk.sli.core.utils.JREFileResolver;
import org.onap.ccsdk.sli.core.utils.KarafRootFileResolver;
import org.onap.ccsdk.sli.core.utils.PropertiesFileResolver;
import org.onap.ccsdk.sli.core.utils.common.CoreDefaultFileResolver;
import org.onap.ccsdk.sli.core.utils.common.SdncConfigEnvVarFileResolver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Immutable properties container for dme2 properties. Since the initial design decision was made to
* utilize <code>Properties</code> instead of an OSGi <code>ManagedService</code>, it was decided to
* make these properties immutable.
*/
public final class Dme2Factory {
private static final Logger LOG = LoggerFactory.getLogger(Dme2Factory.class);
private static final String DME2_PROPERTIES_FILE_NAME = "dme2.properties";
static Properties properties;
private Vector<PropertiesFileResolver> dme2PropertiesFileResolvers = new Vector<>();
public Dme2Factory() {
dme2PropertiesFileResolvers
.add(new SdncConfigEnvVarFileResolver("Using property file (1) from environment variable"));
dme2PropertiesFileResolvers.add(new CoreDefaultFileResolver("Using property file (2) from default directory"));
dme2PropertiesFileResolvers
.add(new JREFileResolver("Using property file (3) from JRE argument", Dme2Factory.class));
dme2PropertiesFileResolvers.add(new KarafRootFileResolver("Using property file (4) from karaf root", this));
File dme2File = getDme2File(DME2_PROPERTIES_FILE_NAME);
init(dme2File);
}
private void init(final File dme2propertiesFile) {
try {
properties = getProperties(dme2propertiesFile);
} catch (final FileNotFoundException e) {
LOG.error("dme2.properties file could not be found at path: {}", dme2propertiesFile, e);
} catch (final IOException e) {
LOG.error("fatal error reading dme2.properties at path: {}", dme2propertiesFile, e);
}
}
/**
* Reports the method chosen for properties resolution to the <code>Logger</code>.
*
* @param message Some user friendly message
* @param fileOptional The file location of the chosen properties file
* @return the file location of the chosen properties file
*/
private static File reportSuccess(final String message, final Optional<File> fileOptional) {
if (fileOptional.isPresent()) {
final File file = fileOptional.get();
LOG.info("{} {}", message, file.getPath());
return file;
}
return null;
}
private File getDme2File(final String dme2Filename) {
for (final PropertiesFileResolver dblibPropertiesFileResolver : dme2PropertiesFileResolvers) {
final Optional<File> fileOptional = dblibPropertiesFileResolver.resolveFile(dme2Filename);
if (fileOptional.isPresent()) {
return reportSuccess(dblibPropertiesFileResolver.getSuccessfulResolutionMessage(), fileOptional);
}
}
return (new File(dme2Filename));
}
private static Properties getProperties(final File dme2File) throws IOException {
final Properties properties = new Properties();
properties.load(new FileReader(dme2File));
return properties;
}
public DME2 createDme2() {
return new DME2(properties);
}
}
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