org.apache.jackrabbit.oak.plugins.document.UnmergedBranches Maven / Gradle / Ivy
/*
* 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
*
* 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.apache.jackrabbit.oak.plugins.document;
import java.lang.ref.ReferenceQueue;
import java.util.List;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import org.apache.jackrabbit.oak.plugins.document.Branch.BranchCommit;
import org.apache.jackrabbit.oak.plugins.document.Branch.BranchReference;
import org.apache.jackrabbit.oak.plugins.document.util.Utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* UnmergedBranches
contains all un-merged branches of a DocumentMK
* instance.
*/
class UnmergedBranches {
private final Logger log = LoggerFactory.getLogger(getClass());
/**
* List of active branches.
*/
private final List branches = new CopyOnWriteArrayList();
/**
* Queue for {@link BranchReference} when the
* {@link DocumentNodeStoreBranch} associated with a {@link Branch} is only
* weakly reachable.
*/
private final ReferenceQueue