diff options
Diffstat (limited to 'openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-api/src/main/java/org/openecomp/sdc/logging/servlet/HttpHeader.java')
-rw-r--r-- | openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-api/src/main/java/org/openecomp/sdc/logging/servlet/HttpHeader.java | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-api/src/main/java/org/openecomp/sdc/logging/servlet/HttpHeader.java b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-api/src/main/java/org/openecomp/sdc/logging/servlet/HttpHeader.java new file mode 100644 index 0000000000..4dcc197796 --- /dev/null +++ b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-api/src/main/java/org/openecomp/sdc/logging/servlet/HttpHeader.java @@ -0,0 +1,55 @@ +/* + * Copyright © 2016-2018 European Support Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.openecomp.sdc.logging.servlet; + +import java.util.function.Function; + +/** + * Handles any of possible header names to read a value for that header. This is useful for backward compatibility, if + * multiple headers may have the same meaning. For instance, when requests come from multiple service, some using an old + * header and others using a new header to pass the same information. + * + * @author evitaliy + * @since 25 Mar 2018 + */ +public class HttpHeader { + + private final String[] keys; + + public HttpHeader(String... keys) { + this.keys = keys; + } + + /** + * Returns the value of any of the possible headers. + * + * @param reader function for reading an HTTP header. + * @return value or null if not found + */ + public String getAny(Function<String, String> reader) { + + for (String k : keys) { + + String value = reader.apply(k); + if (value != null) { + return value; + } + } + + return null; + } +} |