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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.tribe;
import org.apache.logging.log4j.message.ParameterizedMessage;
import org.apache.logging.log4j.util.Supplier;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.action.support.master.TransportMasterNodeReadAction;
import org.elasticsearch.cluster.ClusterChangedEvent;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.ClusterStateListener;
import org.elasticsearch.cluster.ClusterStateTaskConfig;
import org.elasticsearch.cluster.ClusterStateTaskExecutor;
import org.elasticsearch.cluster.block.ClusterBlock;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.block.ClusterBlocks;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.IndexRoutingTable;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.UUIDs;
import org.elasticsearch.common.component.AbstractLifecycleComponent;
import org.elasticsearch.common.component.Lifecycle;
import org.elasticsearch.common.hash.MurmurHash3;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.io.stream.NamedWriteableAwareStreamInput;
import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.network.NetworkModule;
import org.elasticsearch.common.network.NetworkService;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.settings.Setting;
import org.elasticsearch.common.settings.Setting.Property;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.concurrent.ConcurrentCollections;
import org.elasticsearch.common.util.set.Sets;
import org.elasticsearch.discovery.DiscoveryModule;
import org.elasticsearch.discovery.DiscoverySettings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.env.NodeEnvironment;
import org.elasticsearch.gateway.GatewayService;
import org.elasticsearch.node.Node;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.transport.TransportSettings;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.function.Function;
import java.util.stream.Collectors;
import static java.util.Collections.unmodifiableMap;
/**
* The tribe service holds a list of node clients connected to a list of tribe members, and uses their
* cluster state events to update this local node cluster state with the merged view of it.
* <p>
* The {@link #processSettings(org.elasticsearch.common.settings.Settings)} method should be called before
* starting the node, so it will make sure to configure this current node properly with the relevant tribe node
* settings.
* <p>
* The tribe node settings make sure the discovery used is "local", but with no master elected. This means no
* write level master node operations will work ({@link org.elasticsearch.discovery.MasterNotDiscoveredException}
* will be thrown), and state level metadata operations with automatically use the local flag.
* <p>
* The state merged from different clusters include the list of nodes, metadata, and routing table. Each node merged
* will have in its tribe which tribe member it came from. Each index merged will have in its settings which tribe
* member it came from. In case an index has already been merged from one cluster, and the same name index is discovered
* in another cluster, the conflict one will be discarded. This happens because we need to have the correct index name
* to propagate to the relevant cluster.
*/
public class TribeService extends AbstractLifecycleComponent {
public static final ClusterBlock TRIBE_METADATA_BLOCK = new ClusterBlock(10, "tribe node, metadata not allowed", false, false,
RestStatus.BAD_REQUEST, EnumSet.of(ClusterBlockLevel.METADATA_READ, ClusterBlockLevel.METADATA_WRITE));
public static final ClusterBlock TRIBE_WRITE_BLOCK = new ClusterBlock(11, "tribe node, write not allowed", false, false,
RestStatus.BAD_REQUEST, EnumSet.of(ClusterBlockLevel.WRITE));
public static Settings processSettings(Settings settings) {
if (TRIBE_NAME_SETTING.exists(settings)) {
// if its a node client started by this service as tribe, remove any tribe group setting
// to avoid recursive configuration
Settings.Builder sb = Settings.builder().put(settings);
for (String s : settings.getAsMap().keySet()) {
if (s.startsWith("tribe.") && !s.equals(TRIBE_NAME_SETTING.getKey())) {
sb.remove(s);
}
}
return sb.build();
}
Map<String, Settings> nodesSettings = settings.getGroups("tribe", true);
if (nodesSettings.isEmpty()) {
return settings;
}
// its a tribe configured node..., force settings
Settings.Builder sb = Settings.builder().put(settings);
sb.put(Node.NODE_MASTER_SETTING.getKey(), false);
sb.put(Node.NODE_DATA_SETTING.getKey(), false);
sb.put(Node.NODE_INGEST_SETTING.getKey(), false);
if (!NodeEnvironment.MAX_LOCAL_STORAGE_NODES_SETTING.exists(settings)) {
sb.put(NodeEnvironment.MAX_LOCAL_STORAGE_NODES_SETTING.getKey(), nodesSettings.size());
}
sb.put(DiscoveryModule.DISCOVERY_TYPE_SETTING.getKey(), "tribe"); // there is a special discovery implementation for tribe
// nothing is going to be discovered, since no master will be elected
sb.put(DiscoverySettings.INITIAL_STATE_TIMEOUT_SETTING.getKey(), 0);
if (sb.get("cluster.name") == null) {
sb.put("cluster.name", "tribe_" + UUIDs.randomBase64UUID()); // make sure it won't join other tribe nodes in the same JVM
}
sb.put(TransportMasterNodeReadAction.FORCE_LOCAL_SETTING.getKey(), true);
return sb.build();
}
/**
* Interface to allow merging {@link org.elasticsearch.cluster.metadata.MetaData.Custom} in tribe node
* When multiple Mergable Custom metadata of the same type is found (from underlying clusters), the
* Custom metadata will be merged using {@link #merge(MetaData.Custom)} and the result will be stored
* in the tribe cluster state
*
* @param <T> type of custom meta data
*/
public interface MergableCustomMetaData<T extends MetaData.Custom> {
/**
* Merges this custom metadata with other, returning either this or <code>other</code> custom metadata
* for tribe cluster state. This method should not mutate either <code>this</code> or the
* <code>other</code> custom metadata.
*
* @param other custom meta data
* @return the same instance or <code>other</code> custom metadata based on implementation
* if both the instances are considered equal, implementations should return this
* instance to avoid redundant cluster state changes.
*/
T merge(T other);
}
// internal settings only
public static final Setting<String> TRIBE_NAME_SETTING = Setting.simpleString("tribe.name", Property.NodeScope);
private final ClusterService clusterService;
private final String[] blockIndicesWrite;
private final String[] blockIndicesRead;
private final String[] blockIndicesMetadata;
private static final String ON_CONFLICT_ANY = "any", ON_CONFLICT_DROP = "drop", ON_CONFLICT_PREFER = "prefer_";
public static final Setting<String> ON_CONFLICT_SETTING = new Setting<>("tribe.on_conflict", ON_CONFLICT_ANY, (s) -> {
switch (s) {
case ON_CONFLICT_ANY:
case ON_CONFLICT_DROP:
return s;
default:
if (s.startsWith(ON_CONFLICT_PREFER) && s.length() > ON_CONFLICT_PREFER.length()) {
return s;
}
throw new IllegalArgumentException(
"Invalid value for [tribe.on_conflict] must be either [any, drop or start with prefer_] but was: [" + s + "]");
}
}, Property.NodeScope);
public static final Setting<Boolean> BLOCKS_METADATA_SETTING =
Setting.boolSetting("tribe.blocks.metadata", false, Property.NodeScope);
public static final Setting<Boolean> BLOCKS_WRITE_SETTING =
Setting.boolSetting("tribe.blocks.write", false, Property.NodeScope);
public static final Setting<List<String>> BLOCKS_WRITE_INDICES_SETTING =
Setting.listSetting("tribe.blocks.write.indices", Collections.emptyList(), Function.identity(), Property.NodeScope);
public static final Setting<List<String>> BLOCKS_READ_INDICES_SETTING =
Setting.listSetting("tribe.blocks.read.indices", Collections.emptyList(), Function.identity(), Property.NodeScope);
public static final Setting<List<String>> BLOCKS_METADATA_INDICES_SETTING =
Setting.listSetting("tribe.blocks.metadata.indices", Collections.emptyList(), Function.identity(), Property.NodeScope);
public static final Set<String> TRIBE_SETTING_KEYS = Sets.newHashSet(TRIBE_NAME_SETTING.getKey(), ON_CONFLICT_SETTING.getKey(),
BLOCKS_METADATA_INDICES_SETTING.getKey(), BLOCKS_METADATA_SETTING.getKey(), BLOCKS_READ_INDICES_SETTING.getKey(), BLOCKS_WRITE_INDICES_SETTING.getKey(), BLOCKS_WRITE_SETTING.getKey());
// these settings should be passed through to each tribe client, if they are not set explicitly
private static final List<Setting<?>> PASS_THROUGH_SETTINGS = Arrays.asList(
NetworkService.GLOBAL_NETWORK_HOST_SETTING,
NetworkService.GLOBAL_NETWORK_BINDHOST_SETTING,
NetworkService.GLOBAL_NETWORK_PUBLISHHOST_SETTING,
TransportSettings.HOST,
TransportSettings.BIND_HOST,
TransportSettings.PUBLISH_HOST
);
private final String onConflict;
private final Set<String> droppedIndices = ConcurrentCollections.newConcurrentSet();
private final List<Node> nodes = new CopyOnWriteArrayList<>();
private final NamedWriteableRegistry namedWriteableRegistry;
public TribeService(Settings settings, ClusterService clusterService, final String tribeNodeId,
NamedWriteableRegistry namedWriteableRegistry, Function<Settings, Node> clientNodeBuilder) {
super(settings);
this.clusterService = clusterService;
this.namedWriteableRegistry = namedWriteableRegistry;
Map<String, Settings> nodesSettings = new HashMap<>(settings.getGroups("tribe", true));
nodesSettings.remove("blocks"); // remove prefix settings that don't indicate a client
nodesSettings.remove("on_conflict"); // remove prefix settings that don't indicate a client
for (Map.Entry<String, Settings> entry : nodesSettings.entrySet()) {
Settings clientSettings = buildClientSettings(entry.getKey(), tribeNodeId, settings, entry.getValue());
nodes.add(clientNodeBuilder.apply(clientSettings));
}
this.blockIndicesMetadata = BLOCKS_METADATA_INDICES_SETTING.get(settings).toArray(Strings.EMPTY_ARRAY);
this.blockIndicesRead = BLOCKS_READ_INDICES_SETTING.get(settings).toArray(Strings.EMPTY_ARRAY);
this.blockIndicesWrite = BLOCKS_WRITE_INDICES_SETTING.get(settings).toArray(Strings.EMPTY_ARRAY);
this.onConflict = ON_CONFLICT_SETTING.get(settings);
}
// pkg private for testing
/**
* Builds node settings for a tribe client node from the tribe node's global settings,
* combined with tribe specific settings.
*/
static Settings buildClientSettings(String tribeName, String parentNodeId, Settings globalSettings, Settings tribeSettings) {
for (String tribeKey : tribeSettings.getAsMap().keySet()) {
if (tribeKey.startsWith("path.")) {
throw new IllegalArgumentException("Setting [" + tribeKey + "] not allowed in tribe client [" + tribeName + "]");
}
}
Settings.Builder sb = Settings.builder().put(tribeSettings);
sb.put(Node.NODE_NAME_SETTING.getKey(), Node.NODE_NAME_SETTING.get(globalSettings) + "/" + tribeName);
sb.put(Environment.PATH_HOME_SETTING.getKey(), Environment.PATH_HOME_SETTING.get(globalSettings)); // pass through ES home dir
if (Environment.PATH_CONF_SETTING.exists(globalSettings)) {
sb.put(Environment.PATH_CONF_SETTING.getKey(), Environment.PATH_CONF_SETTING.get(globalSettings));
}
if (Environment.PATH_LOGS_SETTING.exists(globalSettings)) {
sb.put(Environment.PATH_LOGS_SETTING.getKey(), Environment.PATH_LOGS_SETTING.get(globalSettings));
}
if (Environment.PATH_SCRIPTS_SETTING.exists(globalSettings)) {
sb.put(Environment.PATH_SCRIPTS_SETTING.getKey(), Environment.PATH_SCRIPTS_SETTING.get(globalSettings));
}
for (Setting<?> passthrough : PASS_THROUGH_SETTINGS) {
if (passthrough.exists(tribeSettings) == false && passthrough.exists(globalSettings)) {
sb.put(passthrough.getKey(), globalSettings.get(passthrough.getKey()));
}
}
sb.put(TRIBE_NAME_SETTING.getKey(), tribeName);
if (sb.get(NetworkModule.HTTP_ENABLED.getKey()) == null) {
sb.put(NetworkModule.HTTP_ENABLED.getKey(), false);
}
sb.put(Node.NODE_DATA_SETTING.getKey(), false);
sb.put(Node.NODE_MASTER_SETTING.getKey(), false);
sb.put(Node.NODE_INGEST_SETTING.getKey(), false);
// node id of a tribe client node is determined by node id of parent node and tribe name
final BytesRef seedAsString = new BytesRef(parentNodeId + "/" + tribeName);
long nodeIdSeed = MurmurHash3.hash128(seedAsString.bytes, seedAsString.offset, seedAsString.length, 0, new MurmurHash3.Hash128()).h1;
sb.put(NodeEnvironment.NODE_ID_SEED_SETTING.getKey(), nodeIdSeed);
sb.put(Node.NODE_LOCAL_STORAGE_SETTING.getKey(), false);
return sb.build();
}
@Override
protected void doStart() {
}
public void startNodes() {
for (Node node : nodes) {
try {
getClusterService(node).addListener(new TribeClusterStateListener(node));
node.start();
} catch (Exception e) {
// calling close is safe for non started nodes, we can just iterate over all
for (Node otherNode : nodes) {
try {
otherNode.close();
} catch (Exception inner) {
inner.addSuppressed(e);
logger.warn((Supplier<?>) () -> new ParameterizedMessage("failed to close node {} on failed start", otherNode), inner);
}
}
if (e instanceof RuntimeException) {
throw (RuntimeException) e;
}
throw new ElasticsearchException(e);
}
}
}
@Override
protected void doStop() {
doClose();
}
@Override
protected void doClose() {
for (Node node : nodes) {
try {
node.close();
} catch (Exception e) {
logger.warn((Supplier<?>) () -> new ParameterizedMessage("failed to close node {}", node), e);
}
}
}
class TribeClusterStateListener implements ClusterStateListener {
private final String tribeName;
private final TribeNodeClusterStateTaskExecutor executor;
TribeClusterStateListener(Node tribeNode) {
String tribeName = TRIBE_NAME_SETTING.get(tribeNode.settings());
this.tribeName = tribeName;
executor = new TribeNodeClusterStateTaskExecutor(tribeName);
}
@Override
public void clusterChanged(final ClusterChangedEvent event) {
logger.debug("[{}] received cluster event, [{}]", tribeName, event.source());
clusterService.submitStateUpdateTask(
"cluster event from " + tribeName,
event,
ClusterStateTaskConfig.build(Priority.NORMAL),
executor,
(source, e) -> logger.warn((Supplier<?>) () -> new ParameterizedMessage("failed to process [{}]", source), e));
}
}
class TribeNodeClusterStateTaskExecutor implements ClusterStateTaskExecutor<ClusterChangedEvent> {
private final String tribeName;
TribeNodeClusterStateTaskExecutor(String tribeName) {
this.tribeName = tribeName;
}
@Override
public String describeTasks(List<ClusterChangedEvent> tasks) {
return tasks.stream().map(ClusterChangedEvent::source).reduce((s1, s2) -> s1 + ", " + s2).orElse("");
}
@Override
public boolean runOnlyOnMaster() {
return false;
}
@Override
public ClusterTasksResult<ClusterChangedEvent> execute(ClusterState currentState, List<ClusterChangedEvent> tasks) throws Exception {
ClusterTasksResult.Builder<ClusterChangedEvent> builder = ClusterTasksResult.builder();
ClusterState.Builder newState = ClusterState.builder(currentState).incrementVersion();
boolean clusterStateChanged = updateNodes(currentState, tasks, newState);
clusterStateChanged |= updateIndicesAndMetaData(currentState, tasks, newState);
builder.successes(tasks);
return builder.build(clusterStateChanged ? newState.build() : currentState);
}
private boolean updateNodes(ClusterState currentState, List<ClusterChangedEvent> tasks, ClusterState.Builder newState) {
boolean clusterStateChanged = false;
// we only need to apply the latest cluster state update
ClusterChangedEvent latestTask = tasks.get(tasks.size() - 1);
ClusterState tribeState = latestTask.state();
DiscoveryNodes.Builder nodes = DiscoveryNodes.builder(currentState.nodes());
// -- merge nodes
// go over existing nodes, and see if they need to be removed
for (DiscoveryNode discoNode : currentState.nodes()) {
String markedTribeName = discoNode.getAttributes().get(TRIBE_NAME_SETTING.getKey());
if (markedTribeName != null && markedTribeName.equals(tribeName)) {
if (tribeState.nodes().get(discoNode.getId()) == null) {
clusterStateChanged = true;
logger.info("[{}] removing node [{}]", tribeName, discoNode);
nodes.remove(discoNode.getId());
}
}
}
// go over tribe nodes, and see if they need to be added
for (DiscoveryNode tribe : tribeState.nodes()) {
if (currentState.nodes().nodeExists(tribe) == false) {
// a new node, add it, but also add the tribe name to the attributes
Map<String, String> tribeAttr = new HashMap<>(tribe.getAttributes());
tribeAttr.put(TRIBE_NAME_SETTING.getKey(), tribeName);
DiscoveryNode discoNode = new DiscoveryNode(tribe.getName(), tribe.getId(), tribe.getEphemeralId(),
tribe.getHostName(), tribe.getHostAddress(), tribe.getAddress(), unmodifiableMap(tribeAttr), tribe.getRoles(),
tribe.getVersion());
clusterStateChanged = true;
logger.info("[{}] adding node [{}]", tribeName, discoNode);
nodes.remove(tribe.getId()); // remove any existing node with the same id but different ephemeral id
nodes.add(discoNode);
}
}
if (clusterStateChanged) {
newState.nodes(nodes);
}
return clusterStateChanged;
}
private boolean updateIndicesAndMetaData(ClusterState currentState, List<ClusterChangedEvent> tasks, ClusterState.Builder newState) {
// we only need to apply the latest cluster state update
ClusterChangedEvent latestTask = tasks.get(tasks.size() - 1);
ClusterState tribeState = latestTask.state();
boolean clusterStateChanged = false;
ClusterBlocks.Builder blocks = ClusterBlocks.builder().blocks(currentState.blocks());
MetaData.Builder metaData = MetaData.builder(currentState.metaData());
RoutingTable.Builder routingTable = RoutingTable.builder(currentState.routingTable());
// go over existing indices, and see if they need to be removed
for (IndexMetaData index : currentState.metaData()) {
String markedTribeName = TRIBE_NAME_SETTING.get(index.getSettings());
if (markedTribeName != null && markedTribeName.equals(tribeName)) {
IndexMetaData tribeIndex = tribeState.metaData().index(index.getIndex());
clusterStateChanged = true;
if (tribeIndex == null || tribeIndex.getState() == IndexMetaData.State.CLOSE) {
logger.info("[{}] removing index {}", tribeName, index.getIndex());
removeIndex(blocks, metaData, routingTable, index);
} else {
// always make sure to update the metadata and routing table, in case
// there are changes in them (new mapping, shards moving from initializing to started)
routingTable.add(tribeState.routingTable().index(index.getIndex()));
Settings tribeSettings = Settings.builder().put(tribeIndex.getSettings())
.put(TRIBE_NAME_SETTING.getKey(), tribeName).build();
metaData.put(IndexMetaData.builder(tribeIndex).settings(tribeSettings));
}
}
}
// go over tribe one, and see if they need to be added
for (IndexMetaData tribeIndex : tribeState.metaData()) {
// if there is no routing table yet, do nothing with it...
IndexRoutingTable table = tribeState.routingTable().index(tribeIndex.getIndex());
if (table == null) {
continue;
}
//NOTE: we have to use the index name here since UUID are different even if the name is the same
final String indexName = tribeIndex.getIndex().getName();
final IndexMetaData indexMetaData = currentState.metaData().index(indexName);
if (indexMetaData == null) {
if (!droppedIndices.contains(indexName)) {
// a new index, add it, and add the tribe name as a setting
clusterStateChanged = true;
logger.info("[{}] adding index {}", tribeName, tribeIndex.getIndex());
addNewIndex(tribeState, blocks, metaData, routingTable, tribeIndex);
}
} else {
String existingFromTribe = TRIBE_NAME_SETTING.get(indexMetaData.getSettings());
if (!tribeName.equals(existingFromTribe)) {
// we have a potential conflict on index names, decide what to do...
if (ON_CONFLICT_ANY.equals(onConflict)) {
// we chose any tribe, carry on
} else if (ON_CONFLICT_DROP.equals(onConflict)) {
// drop the indices, there is a conflict
clusterStateChanged = true;
logger.info("[{}] dropping index {} due to conflict with [{}]", tribeName, tribeIndex.getIndex(),
existingFromTribe);
removeIndex(blocks, metaData, routingTable, tribeIndex);
droppedIndices.add(indexName);
} else if (onConflict.startsWith(ON_CONFLICT_PREFER)) {
// on conflict, prefer a tribe...
String preferredTribeName = onConflict.substring(ON_CONFLICT_PREFER.length());
if (tribeName.equals(preferredTribeName)) {
// the new one is hte preferred one, replace...
clusterStateChanged = true;
logger.info("[{}] adding index {}, preferred over [{}]", tribeName, tribeIndex.getIndex(),
existingFromTribe);
removeIndex(blocks, metaData, routingTable, tribeIndex);
addNewIndex(tribeState, blocks, metaData, routingTable, tribeIndex);
} // else: either the existing one is the preferred one, or we haven't seen one, carry on
}
}
}
}
clusterStateChanged |= updateCustoms(currentState, tasks, metaData);
if (clusterStateChanged) {
newState.blocks(blocks);
newState.metaData(metaData);
newState.routingTable(routingTable.build());
}
return clusterStateChanged;
}
private boolean updateCustoms(ClusterState currentState, List<ClusterChangedEvent> tasks, MetaData.Builder metaData) {
boolean clusterStateChanged = false;
Set<String> changedCustomMetaDataTypeSet = tasks.stream()
.map(ClusterChangedEvent::changedCustomMetaDataSet)
.flatMap(Collection::stream)
.collect(Collectors.toSet());
final List<Node> tribeClientNodes = TribeService.this.nodes;
Map<String, MetaData.Custom> mergedCustomMetaDataMap = mergeChangedCustomMetaData(changedCustomMetaDataTypeSet,
customMetaDataType -> tribeClientNodes.stream()
.map(TribeService::getClusterService)
// cluster service might not have initial state yet (as tribeClientNodes are started after main node)
.filter(cs -> cs.lifecycleState() == Lifecycle.State.STARTED)
.map(ClusterService::state)
.map(ClusterState::metaData)
.map(clusterMetaData -> ((MetaData.Custom) clusterMetaData.custom(customMetaDataType)))
.filter(custom1 -> custom1 != null && custom1 instanceof MergableCustomMetaData)
.map(custom2 -> (MergableCustomMetaData) marshal(custom2))
.collect(Collectors.toList())
);
for (String changedCustomMetaDataType : changedCustomMetaDataTypeSet) {
MetaData.Custom mergedCustomMetaData = mergedCustomMetaDataMap.get(changedCustomMetaDataType);
if (mergedCustomMetaData == null) {
// we ignore merging custom md which doesn't implement MergableCustomMetaData interface
if (currentState.metaData().custom(changedCustomMetaDataType) instanceof MergableCustomMetaData) {
// custom md has been removed
clusterStateChanged = true;
logger.info("[{}] removing custom meta data type [{}]", tribeName, changedCustomMetaDataType);
metaData.removeCustom(changedCustomMetaDataType);
}
} else {
// custom md has been changed
clusterStateChanged = true;
logger.info("[{}] updating custom meta data type [{}] data [{}]", tribeName, changedCustomMetaDataType, mergedCustomMetaData);
metaData.putCustom(changedCustomMetaDataType, mergedCustomMetaData);
}
}
return clusterStateChanged;
}
private void removeIndex(ClusterBlocks.Builder blocks, MetaData.Builder metaData, RoutingTable.Builder routingTable,
IndexMetaData index) {
metaData.remove(index.getIndex().getName());
routingTable.remove(index.getIndex().getName());
blocks.removeIndexBlocks(index.getIndex().getName());
}
private void addNewIndex(ClusterState tribeState, ClusterBlocks.Builder blocks, MetaData.Builder metaData,
RoutingTable.Builder routingTable, IndexMetaData tribeIndex) {
Settings tribeSettings = Settings.builder().put(tribeIndex.getSettings()).put(TRIBE_NAME_SETTING.getKey(), tribeName).build();
metaData.put(IndexMetaData.builder(tribeIndex).settings(tribeSettings));
routingTable.add(tribeState.routingTable().index(tribeIndex.getIndex()));
if (Regex.simpleMatch(blockIndicesMetadata, tribeIndex.getIndex().getName())) {
blocks.addIndexBlock(tribeIndex.getIndex().getName(), IndexMetaData.INDEX_METADATA_BLOCK);
}
if (Regex.simpleMatch(blockIndicesRead, tribeIndex.getIndex().getName())) {
blocks.addIndexBlock(tribeIndex.getIndex().getName(), IndexMetaData.INDEX_READ_BLOCK);
}
if (Regex.simpleMatch(blockIndicesWrite, tribeIndex.getIndex().getName())) {
blocks.addIndexBlock(tribeIndex.getIndex().getName(), IndexMetaData.INDEX_WRITE_BLOCK);
}
}
}
private static ClusterService getClusterService(Node node) {
return node.injector().getInstance(ClusterService.class);
}
// pkg-private for testing
static Map<String, MetaData.Custom> mergeChangedCustomMetaData(Set<String> changedCustomMetaDataTypeSet,
Function<String, List<MergableCustomMetaData>> customMetaDataByTribeNode) {
Map<String, MetaData.Custom> changedCustomMetaDataMap = new HashMap<>(changedCustomMetaDataTypeSet.size());
for (String customMetaDataType : changedCustomMetaDataTypeSet) {
customMetaDataByTribeNode.apply(customMetaDataType).stream()
.reduce((mergableCustomMD, mergableCustomMD2) ->
((MergableCustomMetaData) mergableCustomMD.merge((MetaData.Custom) mergableCustomMD2)))
.ifPresent(mergedCustomMetaData ->
changedCustomMetaDataMap.put(customMetaDataType, ((MetaData.Custom) mergedCustomMetaData)));
}
return changedCustomMetaDataMap;
}
/**
* Since custom metadata can be loaded by a plugin class loader that resides in a sub-node, we need to
* marshal this object into something the tribe node can work with
*/
private MetaData.Custom marshal(MetaData.Custom custom) {
try (BytesStreamOutput bytesStreamOutput = new BytesStreamOutput()){
bytesStreamOutput.writeNamedWriteable(custom);
try(StreamInput input = bytesStreamOutput.bytes().streamInput()) {
StreamInput namedInput = new NamedWriteableAwareStreamInput(input, namedWriteableRegistry);
MetaData.Custom marshaled = namedInput.readNamedWriteable(MetaData.Custom.class);
return marshaled;
}
} catch (IOException ex) {
throw new IllegalStateException("cannot marshal object with type " + custom.getWriteableName() + " to tribe node");
}
}
}