Line data    Source code

       1             : // Copyright (C) 2020 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.MoreObjects;
      18             : import com.google.common.collect.ImmutableList;
      19             : import java.util.ArrayList;
      20             : import java.util.List;
      21             : 
      22             : /**
      23             :  * Thread-safe store for ACL log records.
      24             :  *
      25             :  * <p>This class is intended to keep track of user ACL records in {@link LoggingContext}. It needs
      26             :  * to be thread-safe because it gets shared between threads when the logging context is copied to
      27             :  * another thread (see {@link LoggingContextAwareRunnable} and {@link LoggingContextAwareCallable}.
      28             :  * In this case the logging contexts of both threads share the same instance of this class. This is
      29             :  * important since ACL log records are processed only at the end of a request and user ACL records
      30             :  * that are created in another thread should not get lost.
      31             :  */
      32         148 : public class MutableAclLogRecords {
      33         148 :   private final ArrayList<String> aclLogRecords = new ArrayList<>();
      34             : 
      35             :   public synchronized void add(String record) {
      36           1 :     aclLogRecords.add(record);
      37           1 :   }
      38             : 
      39             :   public synchronized void set(List<String> records) {
      40           0 :     aclLogRecords.clear();
      41           0 :     aclLogRecords.addAll(records);
      42           0 :   }
      43             : 
      44             :   public synchronized ImmutableList<String> list() {
      45         148 :     return ImmutableList.copyOf(aclLogRecords);
      46             :   }
      47             : 
      48             :   public boolean isEmpty() {
      49          15 :     return aclLogRecords.isEmpty();
      50             :   }
      51             : 
      52             :   @Override
      53             :   public String toString() {
      54           0 :     return MoreObjects.toStringHelper(this).add("aclLogRecords", aclLogRecords).toString();
      55             :   }
      56             : }