Line data    Source code

       1             : // Copyright (C) 2016 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.server.logging;
      16             : 
      17             : import com.google.common.base.Enums;
      18             : import com.google.common.hash.Hasher;
      19             : import com.google.common.hash.Hashing;
      20             : import com.google.gerrit.common.Nullable;
      21             : import com.google.gerrit.server.util.time.TimeUtil;
      22             : import java.net.InetAddress;
      23             : import java.net.UnknownHostException;
      24             : 
      25             : /** Unique identifier for an end-user request, used in logs and similar. */
      26             : public class RequestId {
      27             :   private static final String MACHINE_ID;
      28             : 
      29             :   static {
      30             :     String id;
      31             :     try {
      32         110 :       id = InetAddress.getLocalHost().getHostAddress();
      33           0 :     } catch (UnknownHostException e) {
      34           0 :       id = "unknown";
      35         110 :     }
      36         110 :     MACHINE_ID = id;
      37         110 :   }
      38             : 
      39         104 :   public enum Type {
      40         104 :     RECEIVE_ID,
      41         104 :     SUBMISSION_ID,
      42         104 :     TRACE_ID;
      43             : 
      44             :     static boolean isId(String id) {
      45         102 :       return id != null && Enums.getIfPresent(Type.class, id).isPresent();
      46             :     }
      47             :   }
      48             : 
      49             :   public static boolean isSet() {
      50         110 :     return LoggingContext.getInstance().getTagsAsMap().keySet().stream().anyMatch(Type::isId);
      51             :   }
      52             : 
      53             :   private final String str;
      54             : 
      55             :   public RequestId() {
      56           3 :     this(null);
      57           3 :   }
      58             : 
      59         102 :   public RequestId(@Nullable String resourceId) {
      60         102 :     Hasher h = Hashing.murmur3_128().newHasher();
      61         102 :     h.putLong(Thread.currentThread().getId()).putUnencodedChars(MACHINE_ID);
      62         102 :     str =
      63         102 :         (resourceId != null ? resourceId + "-" : "")
      64         102 :             + TimeUtil.now().toEpochMilli()
      65             :             + "-"
      66         102 :             + h.hash().toString().substring(0, 8);
      67         102 :   }
      68             : 
      69             :   @Override
      70             :   public String toString() {
      71         102 :     return str;
      72             :   }
      73             : 
      74             :   public String toStringForStorage() {
      75           0 :     return str;
      76             :   }
      77             : }