FilePropertyLoader.java
/*
* Copyright (c) 2019, WSO2 Inc. (http://www.wso2.org) 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.
*/
package org.apache.synapse.commons.util;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.commons.SynapseCommonsException;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
/**
* File Property loader can be used to load the file property variables.
*/
public class FilePropertyLoader {
private static final Log LOG = LogFactory.getLog(FilePropertyLoader.class);
private static final String CONF_LOCATION = "conf.location";
private static final String FILE_PROPERTY_PATH = "synapse.commons.file.properties.path";
private static final String DEFAULT_PROPERTY_FILE = "file.properties";
private Map propertyMap;
private static FilePropertyLoader fileLoaderInstance;
public static FilePropertyLoader getInstance() {
if ( null == fileLoaderInstance) {
fileLoaderInstance = new FilePropertyLoader();
fileLoaderInstance.loadPropertiesFile();
}
return fileLoaderInstance;
}
public String getValue(String input) {
return (String) propertyMap.get(input);
}
private void loadPropertiesFile() throws SynapseCommonsException {
String filePath = System.getProperty(FILE_PROPERTY_PATH);
if ( null == filePath || filePath.isEmpty()) {
throw new SynapseCommonsException(FILE_PROPERTY_PATH + " is empty or null");
}
if (("default").equals(filePath)) {
filePath = System.getProperty(CONF_LOCATION) + File.separator + DEFAULT_PROPERTY_FILE;
}
File file = new File(filePath);
boolean isFileExists = file.exists();
if (isFileExists) {
try (InputStream in = new FileInputStream(filePath)) {
Properties rawProps = new Properties();
propertyMap = new HashMap();
rawProps.load(in);
for (Map.Entry<Object, Object> propertyEntry : rawProps.entrySet()) {
String strValue = (String) propertyEntry.getValue();
propertyMap.put(propertyEntry.getKey(), strValue);
}
if (LOG.isDebugEnabled()) {
LOG.debug("Loaded factory properties from " + filePath + ": " + propertyMap);
}
} catch (IOException ex) {
throw new SynapseCommonsException("Failed to read " + filePath, ex);
}
} else {
throw new SynapseCommonsException("File cannot found in " + filePath);
}
}
}