org.elasticsearch.index.engine.Segment Maven / Gradle / Ivy
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* 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.engine;
import com.google.common.collect.Iterators;
import org.apache.lucene.util.Accountable;
import org.apache.lucene.util.Accountables;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Streamable;
import org.elasticsearch.common.lucene.Lucene;
import org.elasticsearch.common.unit.ByteSizeValue;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
public class Segment implements Streamable {
private String name;
private long generation;
public boolean committed;
public boolean search;
public long sizeInBytes = -1;
public int docCount = -1;
public int delDocCount = -1;
public org.apache.lucene.util.Version version = null;
public Boolean compound = null;
public String mergeId;
public long memoryInBytes;
public Accountable ramTree = null;
Segment() {
}
public Segment(String name) {
this.name = name;
this.generation = Long.parseLong(name.substring(1), Character.MAX_RADIX);
}
public String getName() {
return this.name;
}
public long getGeneration() {
return this.generation;
}
public boolean isCommitted() {
return this.committed;
}
public boolean isSearch() {
return this.search;
}
public int getNumDocs() {
return this.docCount;
}
public int getDeletedDocs() {
return this.delDocCount;
}
public ByteSizeValue getSize() {
return new ByteSizeValue(sizeInBytes);
}
public long getSizeInBytes() {
return this.sizeInBytes;
}
public org.apache.lucene.util.Version getVersion() {
return version;
}
@Nullable
public Boolean isCompound() {
return compound;
}
/**
* If set, a string representing that the segment is part of a merge, with the value representing the
* group of segments that represent this merge.
*/
@Nullable
public String getMergeId() {
return this.mergeId;
}
/**
* Estimation of the memory usage used by a segment.
*/
public long getMemoryInBytes() {
return this.memoryInBytes;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Segment segment = (Segment) o;
if (name != null ? !name.equals(segment.name) : segment.name != null) return false;
return true;
}
@Override
public int hashCode() {
return name != null ? name.hashCode() : 0;
}
public static Segment readSegment(StreamInput in) throws IOException {
Segment segment = new Segment();
segment.readFrom(in);
return segment;
}
@Override
public void readFrom(StreamInput in) throws IOException {
name = in.readString();
generation = Long.parseLong(name.substring(1), Character.MAX_RADIX);
committed = in.readBoolean();
search = in.readBoolean();
docCount = in.readInt();
delDocCount = in.readInt();
sizeInBytes = in.readLong();
version = Lucene.parseVersionLenient(in.readOptionalString(), null);
compound = in.readOptionalBoolean();
mergeId = in.readOptionalString();
memoryInBytes = in.readLong();
if (in.readBoolean()) {
// verbose mode
ramTree = readRamTree(in);
}
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeString(name);
out.writeBoolean(committed);
out.writeBoolean(search);
out.writeInt(docCount);
out.writeInt(delDocCount);
out.writeLong(sizeInBytes);
out.writeOptionalString(version.toString());
out.writeOptionalBoolean(compound);
out.writeOptionalString(mergeId);
out.writeLong(memoryInBytes);
boolean verbose = ramTree != null;
out.writeBoolean(verbose);
if (verbose) {
writeRamTree(out, ramTree);
}
}
Accountable readRamTree(StreamInput in) throws IOException {
final String name = in.readString();
final long bytes = in.readVLong();
int numChildren = in.readVInt();
if (numChildren == 0) {
return Accountables.namedAccountable(name, bytes);
}
List children = new ArrayList(numChildren);
while (numChildren-- > 0) {
children.add(readRamTree(in));
}
return Accountables.namedAccountable(name, children, bytes);
}
// the ram tree is written recursively since the depth is fairly low (5 or 6)
void writeRamTree(StreamOutput out, Accountable tree) throws IOException {
out.writeString(tree.toString());
out.writeVLong(tree.ramBytesUsed());
Collection children = tree.getChildResources();
out.writeVInt(children.size());
for (Accountable child : children) {
writeRamTree(out, child);
}
}
@Override
public String toString() {
return "Segment{" +
"name='" + name + '\'' +
", generation=" + generation +
", committed=" + committed +
", search=" + search +
", sizeInBytes=" + sizeInBytes +
", docCount=" + docCount +
", delDocCount=" + delDocCount +
", version='" + version + '\'' +
", compound=" + compound +
", mergeId='" + mergeId + '\'' +
", memoryInBytes=" + memoryInBytes +
'}';
}
}