| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.apache.knox.gateway.trace; |
| |
| import org.apache.knox.gateway.audit.api.CorrelationContext; |
| import org.apache.knox.gateway.audit.api.CorrelationService; |
| import org.apache.knox.gateway.audit.api.CorrelationServiceFactory; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.StringTokenizer; |
| |
| public class TraceUtil { |
| |
| private static CorrelationService cs = CorrelationServiceFactory.getCorrelationService(); |
| |
| static void appendCorrelationContext(final StringBuilder sb ) { |
| CorrelationContext cc = cs.getContext(); |
| if( cc == null ) { |
| sb.append( "||" ); |
| } else { |
| append( sb, cc.getRootRequestId() ); |
| sb.append('|'); |
| append( sb, cc.getParentRequestId() ); |
| sb.append('|'); |
| append( sb, cc.getRequestId() ); |
| } |
| } |
| |
| private static void append( final StringBuilder sb, final String s ) { |
| if( s != null ) { |
| sb.append( s ); |
| } |
| } |
| |
| static Set<Integer> parseIntegerSet(String str ) { |
| Set<Integer> set = new HashSet<>(); |
| if( str != null && !str.trim().isEmpty() ) { |
| StringTokenizer parser = new StringTokenizer( str.trim(), ",", false ); |
| while( parser.hasMoreTokens() ) { |
| addParsedIntegerToSet( set, parser.nextToken() ); |
| } |
| } |
| return set; |
| } |
| |
| private static void addParsedIntegerToSet( Set<Integer> set, String str ) { |
| if( str != null && !str.trim().isEmpty() ) { |
| try { |
| set.add( Integer.valueOf( str.trim() ) ); |
| } catch( NumberFormatException e ) { |
| // Ignore it. |
| } |
| } |
| } |
| |
| } |