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// Copyright (C) 2020 The Android Open Source Project
//
// 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 com.google.gerrit.server.logging;
import com.google.common.base.MoreObjects;
import com.google.common.collect.ImmutableList;
import java.util.ArrayList;
import java.util.List;
/**
* Thread-safe store for ACL log records.
*
* <p>This class is intended to keep track of user ACL records in {@link LoggingContext}. It needs
* to be thread-safe because it gets shared between threads when the logging context is copied to
* another thread (see {@link LoggingContextAwareRunnable} and {@link LoggingContextAwareCallable}.
* In this case the logging contexts of both threads share the same instance of this class. This is
* important since ACL log records are processed only at the end of a request and user ACL records
* that are created in another thread should not get lost.
*/
public class MutableAclLogRecords {
private final ArrayList<String> aclLogRecords = new ArrayList<>();
public synchronized void add(String record) {
aclLogRecords.add(record);
}
public synchronized void set(List<String> records) {
aclLogRecords.clear();
aclLogRecords.addAll(records);
}
public synchronized ImmutableList<String> list() {
return ImmutableList.copyOf(aclLogRecords);
}
public boolean isEmpty() {
return aclLogRecords.isEmpty();
}
@Override
public String toString() {
return MoreObjects.toStringHelper(this).add("aclLogRecords", aclLogRecords).toString();
}
}