2 * Copyright © 2016-2018 European Support Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.openecomp.sdc.logging.slf4j;
21 import java.util.EnumMap;
25 * Because we don't know which information should be carried over from MDC, and which shouldn't, copy just the keys that
26 * the logging service uses.
33 private MDCDelegate() {
34 // static methods only, prevent instantiation
38 * Get a copy of logging MDC fields.
40 static Map<ContextField, String> copy() {
42 Map<ContextField, String> copy = new EnumMap<>(ContextField.class);
43 for (ContextField k : ContextField.values()) {
44 String v = MDC.get(k.asKey());
54 * Reads all context fields from MDC.
56 static Map<ContextField, String> get() {
57 return get(ContextField.values());
61 * Reads selected fields from MDC.
63 static Map<ContextField, String> get(ContextField... fields) {
65 Map<ContextField, String> values = new EnumMap<>(ContextField.class);
67 for (ContextField key : fields) {
68 values.put(key, MDC.get(key.asKey()));
75 * Entirely replaces the logging MDC context with the content of the argument. Logging keys that are not present in
76 * the input map will be cleared from MDC.
78 static void replace(Map<ContextField, String> values) {
80 for (ContextField key : ContextField.values()) {
81 updateKey(key, values.get(key));
86 * Push data by multiple data providers on MDC.
88 static void put(ContextProvider... dataProviders) {
92 for (ContextProvider provider : dataProviders) {
93 push(provider.values());
98 * Updates the logging MDC context with the content of the argument. Logging keys that are not present in the input
99 * map will remain "as is", keys with null values will be cleared from MDC.
101 private static void push(Map<ContextField, String> values) {
103 for (Map.Entry<ContextField, String> entry : values.entrySet()) {
104 updateKey(entry.getKey(), entry.getValue());
108 private static void updateKey(ContextField key, String value) {
111 MDC.put(key.asKey(), value);
113 MDC.remove(key.asKey());
117 static void clear() {
119 for (ContextField field : ContextField.values()) {
120 MDC.remove(field.asKey());