/*
* 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.cluster;
import com.google.common.collect.ImmutableMap;
import org.elasticsearch.cluster.ClusterState.Custom;
import org.elasticsearch.cluster.metadata.SnapshotId;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.index.shard.ShardId;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* Meta data about restore processes that are currently executing
*/
public class RestoreInProgress extends AbstractDiffable<Custom> implements Custom {
public static final String TYPE = "restore";
public static final RestoreInProgress PROTO = new RestoreInProgress();
private final List<Entry> entries;
/**
* Constructs new restore metadata
*
* @param entries list of currently running restore processes
*/
public RestoreInProgress(List<Entry> entries) {
this.entries = entries;
}
/**
* Constructs new restore metadata
*
* @param entries list of currently running restore processes
*/
public RestoreInProgress(Entry... entries) {
this.entries = Arrays.asList(entries);
}
/**
* Returns list of currently running restore processes
*
* @return list of currently running restore processes
*/
public List<Entry> entries() {
return this.entries;
}
/**
* Returns currently running restore process with corresponding snapshot id or null if this snapshot is not being
* restored
*
* @param snapshotId snapshot id
* @return restore metadata or null
*/
public Entry snapshot(SnapshotId snapshotId) {
for (Entry entry : entries) {
if (snapshotId.equals(entry.snapshotId())) {
return entry;
}
}
return null;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
RestoreInProgress that = (RestoreInProgress) o;
if (!entries.equals(that.entries)) return false;
return true;
}
@Override
public int hashCode() {
return entries.hashCode();
}
/**
* Restore metadata
*/
public static class Entry {
private final State state;
private final SnapshotId snapshotId;
private final ImmutableMap<ShardId, ShardRestoreStatus> shards;
private final List<String> indices;
/**
* Creates new restore metadata
*
* @param snapshotId snapshot id
* @param state current state of the restore process
* @param indices list of indices being restored
* @param shards list of shards being restored and thier current restore status
*/
public Entry(SnapshotId snapshotId, State state, List<String> indices, ImmutableMap<ShardId, ShardRestoreStatus> shards) {
this.snapshotId = snapshotId;
this.state = state;
this.indices = indices;
if (shards == null) {
this.shards = ImmutableMap.of();
} else {
this.shards = shards;
}
}
/**
* Returns snapshot id
*
* @return snapshot id
*/
public SnapshotId snapshotId() {
return this.snapshotId;
}
/**
* Returns list of shards that being restore and their status
*
* @return list of shards
*/
public ImmutableMap<ShardId, ShardRestoreStatus> shards() {
return this.shards;
}
/**
* Returns current restore state
*
* @return restore state
*/
public State state() {
return state;
}
/**
* Returns list of indices
*
* @return list of indices
*/
public List<String> indices() {
return indices;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Entry entry = (Entry) o;
if (!indices.equals(entry.indices)) return false;
if (!snapshotId.equals(entry.snapshotId)) return false;
if (!shards.equals(entry.shards)) return false;
if (state != entry.state) return false;
return true;
}
@Override
public int hashCode() {
int result = state.hashCode();
result = 31 * result + snapshotId.hashCode();
result = 31 * result + shards.hashCode();
result = 31 * result + indices.hashCode();
return result;
}
}
/**
* Represents status of a restored shard
*/
public static class ShardRestoreStatus {
private State state;
private String nodeId;
private String reason;
private ShardRestoreStatus() {
}
/**
* Constructs a new shard restore status in initializing state on the given node
*
* @param nodeId node id
*/
public ShardRestoreStatus(String nodeId) {
this(nodeId, State.INIT);
}
/**
* Constructs a new shard restore status in with specified state on the given node
*
* @param nodeId node id
* @param state restore state
*/
public ShardRestoreStatus(String nodeId, State state) {
this(nodeId, state, null);
}
/**
* Constructs a new shard restore status in with specified state on the given node with specified failure reason
*
* @param nodeId node id
* @param state restore state
* @param reason failure reason
*/
public ShardRestoreStatus(String nodeId, State state, String reason) {
this.nodeId = nodeId;
this.state = state;
this.reason = reason;
}
/**
* Returns current state
*
* @return current state
*/
public State state() {
return state;
}
/**
* Returns node id of the node where shared is getting restored
*
* @return node id
*/
public String nodeId() {
return nodeId;
}
/**
* Returns failure reason
*
* @return failure reason
*/
public String reason() {
return reason;
}
/**
* Reads restore status from stream input
*
* @param in stream input
* @return restore status
*/
public static ShardRestoreStatus readShardRestoreStatus(StreamInput in) throws IOException {
ShardRestoreStatus shardSnapshotStatus = new ShardRestoreStatus();
shardSnapshotStatus.readFrom(in);
return shardSnapshotStatus;
}
/**
* Reads restore status from stream input
*
* @param in stream input
*/
public void readFrom(StreamInput in) throws IOException {
nodeId = in.readOptionalString();
state = State.fromValue(in.readByte());
reason = in.readOptionalString();
}
/**
* Writes restore status to stream output
*
* @param out stream input
*/
public void writeTo(StreamOutput out) throws IOException {
out.writeOptionalString(nodeId);
out.writeByte(state.value);
out.writeOptionalString(reason);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ShardRestoreStatus status = (ShardRestoreStatus) o;
if (nodeId != null ? !nodeId.equals(status.nodeId) : status.nodeId != null) return false;
if (reason != null ? !reason.equals(status.reason) : status.reason != null) return false;
if (state != status.state) return false;
return true;
}
@Override
public int hashCode() {
int result = state != null ? state.hashCode() : 0;
result = 31 * result + (nodeId != null ? nodeId.hashCode() : 0);
result = 31 * result + (reason != null ? reason.hashCode() : 0);
return result;
}
}
/**
* Shard restore process state
*/
public static enum State {
/**
* Initializing state
*/
INIT((byte) 0),
/**
* Started state
*/
STARTED((byte) 1),
/**
* Restore finished successfully
*/
SUCCESS((byte) 2),
/**
* Restore failed
*/
FAILURE((byte) 3);
private byte value;
/**
* Constructs new state
*
* @param value state code
*/
State(byte value) {
this.value = value;
}
/**
* Returns state code
*
* @return state code
*/
public byte value() {
return value;
}
/**
* Returns true if restore process completed (either successfully or with failure)
*
* @return true if restore process completed
*/
public boolean completed() {
return this == SUCCESS || this == FAILURE;
}
/**
* Returns state corresponding to state code
*
* @param value stat code
* @return state
*/
public static State fromValue(byte value) {
switch (value) {
case 0:
return INIT;
case 1:
return STARTED;
case 2:
return SUCCESS;
case 3:
return FAILURE;
default:
throw new IllegalArgumentException("No snapshot state for value [" + value + "]");
}
}
}
/**
* {@inheritDoc}
*/
@Override
public String type() {
return TYPE;
}
/**
* {@inheritDoc}
*/
@Override
public RestoreInProgress readFrom(StreamInput in) throws IOException {
Entry[] entries = new Entry[in.readVInt()];
for (int i = 0; i < entries.length; i++) {
SnapshotId snapshotId = SnapshotId.readSnapshotId(in);
State state = State.fromValue(in.readByte());
int indices = in.readVInt();
List<String> indexBuilder = new ArrayList<>();
for (int j = 0; j < indices; j++) {
indexBuilder.add(in.readString());
}
ImmutableMap.Builder<ShardId, ShardRestoreStatus> builder = ImmutableMap.<ShardId, ShardRestoreStatus>builder();
int shards = in.readVInt();
for (int j = 0; j < shards; j++) {
ShardId shardId = ShardId.readShardId(in);
ShardRestoreStatus shardState = ShardRestoreStatus.readShardRestoreStatus(in);
builder.put(shardId, shardState);
}
entries[i] = new Entry(snapshotId, state, Collections.unmodifiableList(indexBuilder), builder.build());
}
return new RestoreInProgress(entries);
}
/**
* {@inheritDoc}
*/
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeVInt(entries.size());
for (Entry entry : entries) {
entry.snapshotId().writeTo(out);
out.writeByte(entry.state().value());
out.writeVInt(entry.indices().size());
for (String index : entry.indices()) {
out.writeString(index);
}
out.writeVInt(entry.shards().size());
for (Map.Entry<ShardId, ShardRestoreStatus> shardEntry : entry.shards().entrySet()) {
shardEntry.getKey().writeTo(out);
shardEntry.getValue().writeTo(out);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public XContentBuilder toXContent(XContentBuilder builder, ToXContent.Params params) throws IOException {
builder.startArray("snapshots");
for (Entry entry : entries) {
toXContent(entry, builder, params);
}
builder.endArray();
return builder;
}
/**
* Serializes single restore operation
*
* @param entry restore operation metadata
* @param builder XContent builder
* @param params serialization parameters
*/
public void toXContent(Entry entry, XContentBuilder builder, ToXContent.Params params) throws IOException {
builder.startObject();
builder.field("snapshot", entry.snapshotId().getSnapshot());
builder.field("repository", entry.snapshotId().getRepository());
builder.field("state", entry.state());
builder.startArray("indices");
{
for (String index : entry.indices()) {
builder.value(index);
}
}
builder.endArray();
builder.startArray("shards");
{
for (Map.Entry<ShardId, ShardRestoreStatus> shardEntry : entry.shards.entrySet()) {
ShardId shardId = shardEntry.getKey();
ShardRestoreStatus status = shardEntry.getValue();
builder.startObject();
{
builder.field("index", shardId.getIndex());
builder.field("shard", shardId.getId());
builder.field("state", status.state());
}
builder.endObject();
}
}
builder.endArray();
builder.endObject();
}
}