Add protected methods to Configuration so subclasses may extend it

Signed-off-by: Isaac Hier <ihier@uber.com>

jaeger-core/src/main/java/io/jaegertracing/Configuration.java

@@ -181,7 +181,6 @@ public Configuration(String serviceName) {
     this.serviceName = JaegerTracer.Builder.checkValidServiceName(serviceName);
   }
 
-
   /**
    * @return Configuration object from environmental variables
    */
@@ -462,7 +461,7 @@ public void apply(JaegerTracer.Builder builder) {
       registerCodec(builder, Format.Builtin.TEXT_MAP);
     }
 
-    protected void registerCodec(JaegerTracer.Builder builder, Format<TextMap> format) {
+    private void registerCodec(JaegerTracer.Builder builder, Format<TextMap> format) {
       if (codecs.containsKey(format)) {
         List<Codec<TextMap>> codecsForFormat = codecs.get(format);
         Codec<TextMap> codec = codecsForFormat.size() == 1
@@ -653,19 +652,19 @@ public static SenderConfiguration fromEnv() {
     }
   }
 
-  private static String stringOrDefault(String value, String defaultValue) {
+  protected static String stringOrDefault(String value, String defaultValue) {
     return value != null && value.length() > 0 ? value : defaultValue;
   }
 
-  private static Number numberOrDefault(Number value, Number defaultValue) {
+  protected static Number numberOrDefault(Number value, Number defaultValue) {
     return value != null ? value : defaultValue;
   }
 
-  private static String getProperty(String name) {
+  protected static String getProperty(String name) {
     return System.getProperty(name, System.getenv(name));
   }
 
-  private static Integer getPropertyAsInt(String name) {
+  protected static Integer getPropertyAsInt(String name) {
     String value = getProperty(name);
     if (value != null) {
       try {
@@ -677,7 +676,7 @@ private static Integer getPropertyAsInt(String name) {
     return null;
   }
 
-  private static Number getPropertyAsNum(String name) {
+  protected static Number getPropertyAsNum(String name) {
     String value = getProperty(name);
     if (value != null) {
       try {
@@ -694,11 +693,11 @@ private static Number getPropertyAsNum(String name) {
    * the name. This method defaults to returning false for a name that doesn't exist.
    * @param name The name of the system property
    */
-  private static boolean getPropertyAsBool(String name) {
+  protected static boolean getPropertyAsBool(String name) {
     return Boolean.valueOf(getProperty(name));
   }
 
-  private static Map<String, String> tracerTagsFromEnv() {
+  protected static Map<String, String> tracerTagsFromEnv() {
     Map<String, String> tracerTagMaps = null;
     String tracerTags = getProperty(JAEGER_TAGS);
     if (tracerTags != null) {
@@ -718,7 +717,7 @@ private static Map<String, String> tracerTagsFromEnv() {
     return tracerTagMaps;
   }
 
-  private static String resolveValue(String value) {
+  protected static String resolveValue(String value) {
     if (value.startsWith("${") && value.endsWith("}")) {
       String[] ref = value.substring(2, value.length() - 1).split("\\s*:\\s*");
       if (ref.length > 0) {