package biz.paluch.logging;
/**
* Collection of property names in order to control host name/host name resolution.
*
* @author Mark Paluch
* @since 11.04.14 12:30
*/
public class RuntimeContainerProperties {
/**
* Set this system property to a simple hostname to use a fixed host name.
*/
public static final String PROPERTY_LOGSTASH_GELF_HOSTNAME = "logstash-gelf.hostname";
/**
* Set this system property to a fully qualified hostname to use a fixed host name.
*/
public static final String PROPERTY_LOGSTASH_GELF_FQDN_HOSTNAME = "logstash-gelf.fqdn.hostname";
/**
* Set this system property to <code>true</code> to skip hosname resolution. The string <code>unknown</code> will be used as
* hostname.
*/
public static final String PROPERTY_LOGSTASH_GELF_SKIP_HOSTNAME_RESOLUTION = "logstash-gelf.skipHostnameResolution";
/**
* Set this propery to {@link #RESOLUTION_ORDER_LOCALHOST_NETWORK_FALLBACK} or
* {@link #RESOLUTION_ORDER_NETWORK_LOCALHOST_FALLBACK} to control the hostname resolution order.
*/
public static final String PROPERTY_LOGSTASH_GELF_HOSTNAME_RESOLUTION_ORDER = "logstash-gelf.resolutionOrder";
/**
* Resolution order: First inspect the local host name, then try to get the host name from network devices.
*/
public static final String RESOLUTION_ORDER_LOCALHOST_NETWORK_FALLBACK = "localhost,network";
/**
* Resolution order: First inspect the network devices to retrieve a host name, then try to get the host name from the local
* host.
*/
public static final String RESOLUTION_ORDER_NETWORK_LOCALHOST_FALLBACK = "network,localhost";
private RuntimeContainerProperties() {
}
/**
* Lookup property from ({@link System#getenv(String)} and {@link System#getProperty(String)} as fallback.
*
* @param key the property key
* @param defaultValue the default value
* @return the property value.
*/
public static String getProperty(String key, String defaultValue) {
String env = System.getenv(key);
if (env != null && !"".equals(env)) {
return env;
}
return System.getProperty(key, defaultValue);
}
}