/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.index.shard;
import org.apache.lucene.util.CollectionUtil;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.xcontent.NamedXContentRegistry;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentType;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
public class CommitPoints implements Iterable<CommitPoint> {
private final List<CommitPoint> commitPoints;
public CommitPoints(List<CommitPoint> commitPoints) {
CollectionUtil.introSort(commitPoints, new Comparator<CommitPoint>() {
@Override
public int compare(CommitPoint o1, CommitPoint o2) {
return (o2.version() < o1.version() ? -1 : (o2.version() == o1.version() ? 0 : 1));
}
});
this.commitPoints = Collections.unmodifiableList(new ArrayList<>(commitPoints));
}
public List<CommitPoint> commits() {
return this.commitPoints;
}
public boolean hasVersion(long version) {
for (CommitPoint commitPoint : commitPoints) {
if (commitPoint.version() == version) {
return true;
}
}
return false;
}
public CommitPoint.FileInfo findPhysicalIndexFile(String physicalName) {
for (CommitPoint commitPoint : commitPoints) {
CommitPoint.FileInfo fileInfo = commitPoint.findPhysicalIndexFile(physicalName);
if (fileInfo != null) {
return fileInfo;
}
}
return null;
}
public CommitPoint.FileInfo findNameFile(String name) {
for (CommitPoint commitPoint : commitPoints) {
CommitPoint.FileInfo fileInfo = commitPoint.findNameFile(name);
if (fileInfo != null) {
return fileInfo;
}
}
return null;
}
@Override
public Iterator<CommitPoint> iterator() {
return commitPoints.iterator();
}
public static byte[] toXContent(CommitPoint commitPoint) throws Exception {
XContentBuilder builder = XContentFactory.contentBuilder(XContentType.JSON).prettyPrint();
builder.startObject();
builder.field("version", commitPoint.version());
builder.field("name", commitPoint.name());
builder.field("type", commitPoint.type().toString());
builder.startObject("index_files");
for (CommitPoint.FileInfo fileInfo : commitPoint.indexFiles()) {
builder.startObject(fileInfo.name());
builder.field("physical_name", fileInfo.physicalName());
builder.field("length", fileInfo.length());
if (fileInfo.checksum() != null) {
builder.field("checksum", fileInfo.checksum());
}
builder.endObject();
}
builder.endObject();
builder.startObject("translog_files");
for (CommitPoint.FileInfo fileInfo : commitPoint.translogFiles()) {
builder.startObject(fileInfo.name());
builder.field("physical_name", fileInfo.physicalName());
builder.field("length", fileInfo.length());
builder.endObject();
}
builder.endObject();
builder.endObject();
return BytesReference.toBytes(builder.bytes());
}
public static CommitPoint fromXContent(byte[] data) throws Exception {
// EMPTY is safe here because we never call namedObject
try (XContentParser parser = XContentFactory.xContent(XContentType.JSON).createParser(NamedXContentRegistry.EMPTY, data)) {
String currentFieldName = null;
XContentParser.Token token = parser.nextToken();
if (token == null) {
// no data...
throw new IOException("No commit point data");
}
long version = -1;
String name = null;
CommitPoint.Type type = null;
List<CommitPoint.FileInfo> indexFiles = new ArrayList<>();
List<CommitPoint.FileInfo> translogFiles = new ArrayList<>();
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
List<CommitPoint.FileInfo> files = null;
if ("index_files".equals(currentFieldName) || "indexFiles".equals(currentFieldName)) {
files = indexFiles;
} else if ("translog_files".equals(currentFieldName) || "translogFiles".equals(currentFieldName)) {
files = translogFiles;
} else {
throw new IOException("Can't handle object with name [" + currentFieldName + "]");
}
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
String fileName = currentFieldName;
String physicalName = null;
long size = -1;
String checksum = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token.isValue()) {
if ("physical_name".equals(currentFieldName) || "physicalName".equals(currentFieldName)) {
physicalName = parser.text();
} else if ("length".equals(currentFieldName)) {
size = parser.longValue();
} else if ("checksum".equals(currentFieldName)) {
checksum = parser.text();
}
}
}
if (physicalName == null) {
throw new IOException("Malformed commit, missing physical_name for [" + fileName + "]");
}
if (size == -1) {
throw new IOException("Malformed commit, missing length for [" + fileName + "]");
}
files.add(new CommitPoint.FileInfo(fileName, physicalName, size, checksum));
}
}
} else if (token.isValue()) {
if ("version".equals(currentFieldName)) {
version = parser.longValue();
} else if ("name".equals(currentFieldName)) {
name = parser.text();
} else if ("type".equals(currentFieldName)) {
type = CommitPoint.Type.valueOf(parser.text());
}
}
}
if (version == -1) {
throw new IOException("Malformed commit, missing version");
}
if (name == null) {
throw new IOException("Malformed commit, missing name");
}
if (type == null) {
throw new IOException("Malformed commit, missing type");
}
return new CommitPoint(version, name, type, indexFiles, translogFiles);
}
}
}