protected void appendEnvironmentVariablesAndSystemProperties()

in platforms/osgi-war/src/main/java/io/hawt/blueprint/HawtioBlueprintContextListener.java [102:128]

• 24 lines of code
• 8 McCabe index (conditional complexity)

    protected void appendEnvironmentVariablesAndSystemProperties(ServletContext servletContext, Map<String, String> properties) {
        try {
            Properties sysProperties = System.getProperties();
            // iterating over sysProps.keySet() directly is not thread-safe and may throw ConcurrentMod.Ex.,
            // so first get the keys and then query their values
            Set<String> keys = sysProperties.stringPropertyNames();
            for (String propertyName : keys) {
                String propertyValue = sysProperties.getProperty(propertyName); // value can be null if removed in meantime, but unlikely
                if (propertyName != null && propertyValue != null &&
                    !properties.containsKey(propertyName)) {
                        properties.put(propertyName, propertyValue);
                }
            }

            Map<String, String> env = System.getenv();
            if (env != null) {
                Set<Map.Entry<String, String>> entries = env.entrySet();
                for (Map.Entry<String, String> entry : entries) {
                    String name = entry.getKey();
                    String propertyName = convertEnvironmentVariableToSystemProperty(name);
                    properties.put(propertyName, entry.getValue());
                }
            }
        } catch (Exception e) {
            servletContext.log("Failed to load environment variables: " + e, e);
        }
    }