com.github.alexdlaird.ngrok.conf.JavaNgrokVersion Maven / Gradle / Ivy
package com.github.alexdlaird.ngrok.conf;
import com.github.alexdlaird.ngrok.NgrokClient;
import com.github.alexdlaird.ngrok.NgrokClient.Builder;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import static java.util.Objects.nonNull;
/**
* A singleton object that represents the java-ngrok library version.
*/
public class JavaNgrokVersion {
private static final Logger LOGGER = Logger.getLogger(String.valueOf(NgrokClient.class));
private static JavaNgrokVersion instance = null;
private final String version;
private JavaNgrokVersion(final String version) {
this.version = version;
}
/**
* Get or initialize the singleton instance.
*
* @return The singleton instance.
*/
public static synchronized JavaNgrokVersion getInstance() {
if (instance == null) {
final String version = getVersionFromProperties();
instance = new JavaNgrokVersion(version);
}
return instance;
}
private static String getVersionFromProperties() {
try {
try (final InputStream resourceStream = Builder.class.getResourceAsStream("/version.properties")) {
if (nonNull(resourceStream)) {
final Properties properties = new Properties();
properties.load(resourceStream);
return properties.getProperty("version");
}
}
} catch (final IOException e) {
LOGGER.log(Level.WARNING, "An error occurred trying to read \"version\" from resource properties", e);
}
return null;
}
/**
* Get the version.
*/
public String getVersion() {
return version;
}
}