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org.elasticsearch.cluster.ClusterState Maven / Gradle / Ivy
ElasticSearch - Open Source, Distributed, RESTful Search Engine
/*
* Licensed to ElasticSearch and Shay Banon 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 com.google.common.collect.ImmutableSet;
import org.elasticsearch.ElasticSearchIllegalArgumentException;
import org.elasticsearch.cluster.block.ClusterBlock;
import org.elasticsearch.cluster.block.ClusterBlocks;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.IndexTemplateMetaData;
import org.elasticsearch.cluster.metadata.MappingMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.*;
import org.elasticsearch.cluster.routing.allocation.AllocationExplanation;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.collect.MapBuilder;
import org.elasticsearch.common.compress.CompressedString;
import org.elasticsearch.common.io.stream.*;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.settings.SettingsFilter;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.shard.ShardId;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import static org.elasticsearch.common.collect.MapBuilder.newMapBuilder;
/**
*
*/
public class ClusterState implements ToXContent {
public interface Custom {
interface Factory {
String type();
T readFrom(StreamInput in) throws IOException;
void writeTo(T customState, StreamOutput out) throws IOException;
void toXContent(T customState, XContentBuilder builder, ToXContent.Params params);
}
}
public static Map customFactories = new HashMap();
/**
* Register a custom index meta data factory. Make sure to call it from a static block.
*/
public static void registerFactory(String type, Custom.Factory factory) {
customFactories.put(type, factory);
}
@Nullable
public static Custom.Factory lookupFactory(String type) {
return customFactories.get(type);
}
public static Custom.Factory lookupFactorySafe(String type) throws ElasticSearchIllegalArgumentException {
Custom.Factory factory = customFactories.get(type);
if (factory == null) {
throw new ElasticSearchIllegalArgumentException("No custom state factory registered for type [" + type + "]");
}
return factory;
}
private final long version;
private final RoutingTable routingTable;
private final DiscoveryNodes nodes;
private final MetaData metaData;
private final ClusterBlocks blocks;
private final AllocationExplanation allocationExplanation;
private final ImmutableMap customs;
// built on demand
private volatile RoutingNodes routingNodes;
private SettingsFilter settingsFilter;
public ClusterState(long version, ClusterState state) {
this(version, state.metaData(), state.routingTable(), state.nodes(), state.blocks(), state.allocationExplanation(), state.customs());
}
public ClusterState(long version, MetaData metaData, RoutingTable routingTable, DiscoveryNodes nodes, ClusterBlocks blocks, AllocationExplanation allocationExplanation, ImmutableMap customs) {
this.version = version;
this.metaData = metaData;
this.routingTable = routingTable;
this.nodes = nodes;
this.blocks = blocks;
this.allocationExplanation = allocationExplanation;
this.customs = customs;
}
public long version() {
return this.version;
}
public long getVersion() {
return version();
}
public DiscoveryNodes nodes() {
return this.nodes;
}
public DiscoveryNodes getNodes() {
return nodes();
}
public MetaData metaData() {
return this.metaData;
}
public MetaData getMetaData() {
return metaData();
}
public RoutingTable routingTable() {
return routingTable;
}
public RoutingTable getRoutingTable() {
return routingTable();
}
public RoutingNodes routingNodes() {
return routingTable.routingNodes(this);
}
public RoutingNodes getRoutingNodes() {
return readOnlyRoutingNodes();
}
public ClusterBlocks blocks() {
return this.blocks;
}
public ClusterBlocks getBlocks() {
return blocks;
}
public AllocationExplanation allocationExplanation() {
return this.allocationExplanation;
}
public AllocationExplanation getAllocationExplanation() {
return allocationExplanation();
}
public ImmutableMap customs() {
return this.customs;
}
public ImmutableMap getCustoms() {
return this.customs;
}
/**
* Returns a built (on demand) routing nodes view of the routing table. NOTE, the routing nodes
* are mutable, use them just for read operations
*/
public RoutingNodes readOnlyRoutingNodes() {
if (routingNodes != null) {
return routingNodes;
}
routingNodes = routingTable.routingNodes(this);
return routingNodes;
}
public ClusterState settingsFilter(SettingsFilter settingsFilter) {
this.settingsFilter = settingsFilter;
return this;
}
@Override
public String toString() {
try {
XContentBuilder builder = XContentFactory.jsonBuilder().prettyPrint();
builder.startObject();
toXContent(builder, EMPTY_PARAMS);
builder.endObject();
return builder.string();
} catch (IOException e) {
return "{ \"error\" : \"" + e.getMessage() + "\"}";
}
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
if (!params.paramAsBoolean("filter_nodes", false)) {
builder.field("master_node", nodes().masterNodeId());
}
// blocks
if (!params.paramAsBoolean("filter_blocks", false)) {
builder.startObject("blocks");
if (!blocks().global().isEmpty()) {
builder.startObject("global");
for (ClusterBlock block : blocks().global()) {
block.toXContent(builder, params);
}
builder.endObject();
}
if (!blocks().indices().isEmpty()) {
builder.startObject("indices");
for (Map.Entry> entry : blocks().indices().entrySet()) {
builder.startObject(entry.getKey());
for (ClusterBlock block : entry.getValue()) {
block.toXContent(builder, params);
}
builder.endObject();
}
builder.endObject();
}
builder.endObject();
}
// nodes
if (!params.paramAsBoolean("filter_nodes", false)) {
builder.startObject("nodes");
for (DiscoveryNode node : nodes()) {
builder.startObject(node.id(), XContentBuilder.FieldCaseConversion.NONE);
builder.field("name", node.name());
builder.field("transport_address", node.address().toString());
builder.startObject("attributes");
for (Map.Entry attr : node.attributes().entrySet()) {
builder.field(attr.getKey(), attr.getValue());
}
builder.endObject();
builder.endObject();
}
builder.endObject();
}
// meta data
if (!params.paramAsBoolean("filter_metadata", false)) {
builder.startObject("metadata");
builder.startObject("templates");
for (IndexTemplateMetaData templateMetaData : metaData().templates().values()) {
builder.startObject(templateMetaData.name(), XContentBuilder.FieldCaseConversion.NONE);
builder.field("template", templateMetaData.template());
builder.field("order", templateMetaData.order());
builder.startObject("settings");
Settings settings = settingsFilter.filterSettings(templateMetaData.settings());
for (Map.Entry entry : settings.getAsMap().entrySet()) {
builder.field(entry.getKey(), entry.getValue());
}
builder.endObject();
builder.startObject("mappings");
for (Map.Entry entry : templateMetaData.mappings().entrySet()) {
byte[] mappingSource = entry.getValue().uncompressed();
XContentParser parser = XContentFactory.xContent(mappingSource).createParser(mappingSource);
Map mapping = parser.map();
if (mapping.size() == 1 && mapping.containsKey(entry.getKey())) {
// the type name is the root value, reduce it
mapping = (Map) mapping.get(entry.getKey());
}
builder.field(entry.getKey());
builder.map(mapping);
}
builder.endObject();
builder.endObject();
}
builder.endObject();
builder.startObject("indices");
for (IndexMetaData indexMetaData : metaData()) {
builder.startObject(indexMetaData.index(), XContentBuilder.FieldCaseConversion.NONE);
builder.field("state", indexMetaData.state().toString().toLowerCase(Locale.ENGLISH));
builder.startObject("settings");
Settings settings = indexMetaData.settings();
if (settingsFilter != null) {
settings = settingsFilter.filterSettings(indexMetaData.settings());
}
for (Map.Entry entry : settings.getAsMap().entrySet()) {
builder.field(entry.getKey(), entry.getValue());
}
builder.endObject();
builder.startObject("mappings");
for (Map.Entry entry : indexMetaData.mappings().entrySet()) {
byte[] mappingSource = entry.getValue().source().uncompressed();
XContentParser parser = XContentFactory.xContent(mappingSource).createParser(mappingSource);
Map mapping = parser.map();
if (mapping.size() == 1 && mapping.containsKey(entry.getKey())) {
// the type name is the root value, reduce it
mapping = (Map) mapping.get(entry.getKey());
}
builder.field(entry.getKey());
builder.map(mapping);
}
builder.endObject();
builder.startArray("aliases");
for (String alias : indexMetaData.aliases().keySet()) {
builder.value(alias);
}
builder.endArray();
builder.endObject();
}
builder.endObject();
builder.endObject();
}
// routing table
if (!params.paramAsBoolean("filter_routing_table", false)) {
builder.startObject("routing_table");
builder.startObject("indices");
for (IndexRoutingTable indexRoutingTable : routingTable()) {
builder.startObject(indexRoutingTable.index(), XContentBuilder.FieldCaseConversion.NONE);
builder.startObject("shards");
for (IndexShardRoutingTable indexShardRoutingTable : indexRoutingTable) {
builder.startArray(Integer.toString(indexShardRoutingTable.shardId().id()));
for (ShardRouting shardRouting : indexShardRoutingTable) {
shardRouting.toXContent(builder, params);
}
builder.endArray();
}
builder.endObject();
builder.endObject();
}
builder.endObject();
builder.endObject();
}
// routing nodes
if (!params.paramAsBoolean("filter_routing_table", false)) {
builder.startObject("routing_nodes");
builder.startArray("unassigned");
for (ShardRouting shardRouting : readOnlyRoutingNodes().unassigned()) {
shardRouting.toXContent(builder, params);
}
builder.endArray();
builder.startObject("nodes");
for (RoutingNode routingNode : readOnlyRoutingNodes()) {
builder.startArray(routingNode.nodeId(), XContentBuilder.FieldCaseConversion.NONE);
for (ShardRouting shardRouting : routingNode) {
shardRouting.toXContent(builder, params);
}
builder.endArray();
}
builder.endObject();
builder.endObject();
}
if (!params.paramAsBoolean("filter_routing_table", false)) {
builder.startArray("allocations");
for (Map.Entry> entry : allocationExplanation().explanations().entrySet()) {
builder.startObject();
builder.field("index", entry.getKey().index().name());
builder.field("shard", entry.getKey().id());
builder.startArray("explanations");
for (AllocationExplanation.NodeExplanation nodeExplanation : entry.getValue()) {
builder.field("desc", nodeExplanation.description());
if (nodeExplanation.node() != null) {
builder.startObject("node");
builder.field("id", nodeExplanation.node().id());
builder.field("name", nodeExplanation.node().name());
builder.endObject();
}
}
builder.endArray();
builder.endObject();
}
builder.endArray();
}
if (!params.paramAsBoolean("filter_customs", false)) {
for (Map.Entry entry : customs().entrySet()) {
builder.startObject(entry.getKey());
lookupFactorySafe(entry.getKey()).toXContent(entry.getValue(), builder, params);
builder.endObject();
}
}
return builder;
}
public static Builder builder() {
return new Builder();
}
public static Builder newClusterStateBuilder() {
return new Builder();
}
public static class Builder {
private long version = 0;
private MetaData metaData = MetaData.EMPTY_META_DATA;
private RoutingTable routingTable = RoutingTable.EMPTY_ROUTING_TABLE;
private DiscoveryNodes nodes = DiscoveryNodes.EMPTY_NODES;
private ClusterBlocks blocks = ClusterBlocks.EMPTY_CLUSTER_BLOCK;
private AllocationExplanation allocationExplanation = AllocationExplanation.EMPTY;
private MapBuilder customs = newMapBuilder();
public Builder nodes(DiscoveryNodes.Builder nodesBuilder) {
return nodes(nodesBuilder.build());
}
public Builder nodes(DiscoveryNodes nodes) {
this.nodes = nodes;
return this;
}
public Builder routingTable(RoutingTable.Builder routingTable) {
return routingTable(routingTable.build());
}
public Builder routingResult(RoutingAllocation.Result routingResult) {
this.routingTable = routingResult.routingTable();
this.allocationExplanation = routingResult.explanation();
return this;
}
public Builder routingTable(RoutingTable routingTable) {
this.routingTable = routingTable;
return this;
}
public Builder metaData(MetaData.Builder metaDataBuilder) {
return metaData(metaDataBuilder.build());
}
public Builder metaData(MetaData metaData) {
this.metaData = metaData;
return this;
}
public Builder blocks(ClusterBlocks.Builder blocksBuilder) {
return blocks(blocksBuilder.build());
}
public Builder blocks(ClusterBlocks block) {
this.blocks = block;
return this;
}
public Builder allocationExplanation(AllocationExplanation allocationExplanation) {
this.allocationExplanation = allocationExplanation;
return this;
}
public Builder version(long version) {
this.version = version;
return this;
}
public Custom getCustom(String type) {
return customs.get(type);
}
public Builder putCustom(String type, Custom custom) {
customs.put(type, custom);
return this;
}
public Builder removeCustom(String type) {
customs.remove(type);
return this;
}
public Builder state(ClusterState state) {
this.version = state.version();
this.nodes = state.nodes();
this.routingTable = state.routingTable();
this.metaData = state.metaData();
this.blocks = state.blocks();
this.allocationExplanation = state.allocationExplanation();
this.customs.clear().putAll(state.customs());
return this;
}
public ClusterState build() {
return new ClusterState(version, metaData, routingTable, nodes, blocks, allocationExplanation, customs.immutableMap());
}
public static byte[] toBytes(ClusterState state) throws IOException {
CachedStreamOutput.Entry cachedEntry = CachedStreamOutput.popEntry();
try {
BytesStreamOutput os = cachedEntry.bytes();
writeTo(state, os);
return os.bytes().copyBytesArray().toBytes();
} finally {
CachedStreamOutput.pushEntry(cachedEntry);
}
}
public static ClusterState fromBytes(byte[] data, DiscoveryNode localNode) throws IOException {
return readFrom(new BytesStreamInput(data, false), localNode);
}
public static void writeTo(ClusterState state, StreamOutput out) throws IOException {
out.writeLong(state.version());
MetaData.Builder.writeTo(state.metaData(), out);
RoutingTable.Builder.writeTo(state.routingTable(), out);
DiscoveryNodes.Builder.writeTo(state.nodes(), out);
ClusterBlocks.Builder.writeClusterBlocks(state.blocks(), out);
state.allocationExplanation().writeTo(out);
out.writeVInt(state.customs().size());
for (Map.Entry entry : state.customs().entrySet()) {
out.writeString(entry.getKey());
lookupFactorySafe(entry.getKey()).writeTo(entry.getValue(), out);
}
}
public static ClusterState readFrom(StreamInput in, @Nullable DiscoveryNode localNode) throws IOException {
Builder builder = new Builder();
builder.version = in.readLong();
builder.metaData = MetaData.Builder.readFrom(in);
builder.routingTable = RoutingTable.Builder.readFrom(in);
builder.nodes = DiscoveryNodes.Builder.readFrom(in, localNode);
builder.blocks = ClusterBlocks.Builder.readClusterBlocks(in);
builder.allocationExplanation = AllocationExplanation.readAllocationExplanation(in);
int customSize = in.readVInt();
for (int i = 0; i < customSize; i++) {
String type = in.readString();
Custom customIndexMetaData = lookupFactorySafe(type).readFrom(in);
builder.putCustom(type, customIndexMetaData);
}
return builder.build();
}
}
}
