org.apache.jackrabbit.oak.checkpoint.SegmentTarCheckpoints Maven / Gradle / Ivy
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* 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.
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package org.apache.jackrabbit.oak.checkpoint;
import static org.apache.jackrabbit.oak.segment.file.FileStoreBuilder.fileStoreBuilder;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.jackrabbit.guava.common.collect.Lists;
import org.apache.jackrabbit.guava.common.io.Closer;
import org.apache.jackrabbit.oak.api.PropertyState;
import org.apache.jackrabbit.oak.api.Type;
import org.apache.jackrabbit.oak.segment.SegmentNodeState;
import org.apache.jackrabbit.oak.segment.file.FileStore;
import org.apache.jackrabbit.oak.segment.file.InvalidFileStoreVersionException;
import org.apache.jackrabbit.oak.spi.state.ChildNodeEntry;
import org.apache.jackrabbit.oak.spi.state.NodeBuilder;
import org.apache.jackrabbit.oak.spi.state.NodeState;
class SegmentTarCheckpoints extends Checkpoints {
private static FileStore newFileStore(File path) throws IOException, InvalidFileStoreVersionException {
return fileStoreBuilder(path).withStrictVersionCheck(true).build();
}
static Checkpoints create(File path, Closer closer) throws IOException {
try {
return new SegmentTarCheckpoints(closer.register(newFileStore(path)));
} catch (InvalidFileStoreVersionException e) {
throw new IllegalStateException(e);
}
}
private final FileStore store;
private SegmentTarCheckpoints(FileStore store) {
this.store = store;
}
@Override
public List list() {
List list = Lists.newArrayList();
NodeState ns = store.getHead().getChildNode("checkpoints");
for (ChildNodeEntry cne : ns.getChildNodeEntries()) {
NodeState cneNs = cne.getNodeState();
list.add(new CP(cne.getName(),
cneNs.getLong("created"), cneNs.getLong("timestamp")));
}
return list;
}
@Override
public long removeAll() {
SegmentNodeState head = store.getHead();
NodeBuilder builder = head.builder();
NodeBuilder cps = builder.getChildNode("checkpoints");
long cnt = cps.getChildNodeCount(Integer.MAX_VALUE);
builder.setChildNode("checkpoints");
if (store.getRevisions().setHead(head.getRecordId(), asSegmentNodeState(builder).getRecordId())) {
return cnt;
} else {
return -1;
}
}
@Override
public long removeUnreferenced() {
SegmentNodeState head = store.getHead();
Set refs = getReferencedCheckpoints(head.getChildNode("root"));
NodeBuilder builder = head.builder();
NodeBuilder cps = builder.getChildNode("checkpoints");
long cnt = 0;
for (String c : cps.getChildNodeNames()) {
if (refs.contains(c)) {
continue;
}
cps.getChildNode(c).remove();
cnt++;
}
if (store.getRevisions().setHead(head.getRecordId(), asSegmentNodeState(builder).getRecordId())) {
return cnt;
} else {
return -1;
}
}
@Override
public int remove(String cp) {
SegmentNodeState head = store.getHead();
NodeBuilder builder = head.builder();
NodeBuilder cpn = builder.getChildNode("checkpoints")
.getChildNode(cp);
if (cpn.exists()) {
cpn.remove();
if (store.getRevisions().setHead(head.getRecordId(), asSegmentNodeState(builder).getRecordId())) {
return 1;
} else {
return -1;
}
} else {
return 0;
}
}
@Override
public Map getInfo(String cp) {
SegmentNodeState head = store.getHead();
NodeState props = head.getChildNode("checkpoints").getChildNode(cp).getChildNode("properties");
if (props.exists()) {
Map info = new HashMap<>();
for (PropertyState p : props.getProperties()) {
info.put(p.getName(), p.getValue(Type.STRING));
}
return info;
} else {
return null;
}
}
@Override
public int setInfoProperty(String cp, String name, String value) {
SegmentNodeState head = store.getHead();
NodeBuilder builder = head.builder();
NodeBuilder props = builder.getChildNode("checkpoints").getChildNode(cp).getChildNode("properties");
if (props.exists()) {
if (value == null) {
props.removeProperty(name);
} else {
props.setProperty(name, value, Type.STRING);
}
if (store.getRevisions().setHead(head.getRecordId(), asSegmentNodeState(builder).getRecordId())) {
return 1;
} else {
return -1;
}
} else {
return 0;
}
}
private static SegmentNodeState asSegmentNodeState(NodeBuilder builder) {
return (SegmentNodeState) builder.getNodeState();
}
}
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