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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.
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package org.apache.solr.cloud.overseer;
import java.lang.invoke.MethodHandles;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import com.google.common.collect.ImmutableSet;
import org.apache.solr.cloud.Assign;
import org.apache.solr.cloud.Overseer;
import org.apache.solr.common.cloud.ClusterState;
import org.apache.solr.common.cloud.DocCollection;
import org.apache.solr.common.cloud.Replica;
import org.apache.solr.common.cloud.RoutingRule;
import org.apache.solr.common.cloud.Slice;
import org.apache.solr.common.cloud.ZkCoreNodeProps;
import org.apache.solr.common.cloud.ZkNodeProps;
import org.apache.solr.common.cloud.ZkStateReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.solr.cloud.OverseerCollectionMessageHandler.COLL_PROP_PREFIX;
import static org.apache.solr.cloud.overseer.CollectionMutator.checkCollectionKeyExistence;
import static org.apache.solr.common.util.Utils.makeMap;
public class SliceMutator {
private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
public static final String PREFERRED_LEADER_PROP = COLL_PROP_PREFIX + "preferredleader";
public static final Set<String> SLICE_UNIQUE_BOOLEAN_PROPERTIES = ImmutableSet.of(PREFERRED_LEADER_PROP);
protected final ZkStateReader zkStateReader;
public SliceMutator(ZkStateReader zkStateReader) {
this.zkStateReader = zkStateReader;
}
public ZkWriteCommand addReplica(ClusterState clusterState, ZkNodeProps message) {
log.info("createReplica() {} ", message);
String coll = message.getStr(ZkStateReader.COLLECTION_PROP);
if (!checkCollectionKeyExistence(message)) return ZkStateWriter.NO_OP;
String slice = message.getStr(ZkStateReader.SHARD_ID_PROP);
DocCollection collection = clusterState.getCollection(coll);
Slice sl = collection.getSlice(slice);
if (sl == null) {
log.error("Invalid Collection/Slice {}/{} ", coll, slice);
return ZkStateWriter.NO_OP;
}
String coreNodeName = Assign.assignNode(collection);
Replica replica = new Replica(coreNodeName,
makeMap(
ZkStateReader.CORE_NAME_PROP, message.getStr(ZkStateReader.CORE_NAME_PROP),
ZkStateReader.BASE_URL_PROP, message.getStr(ZkStateReader.BASE_URL_PROP),
ZkStateReader.STATE_PROP, message.getStr(ZkStateReader.STATE_PROP),
ZkStateReader.NODE_NAME_PROP, message.getStr(ZkStateReader.NODE_NAME_PROP)));
return new ZkWriteCommand(coll, updateReplica(collection, sl, replica.getName(), replica));
}
public ZkWriteCommand removeReplica(ClusterState clusterState, ZkNodeProps message) {
final String cnn = message.getStr(ZkStateReader.CORE_NODE_NAME_PROP);
final String collection = message.getStr(ZkStateReader.COLLECTION_PROP);
final String baseUrl = message.getStr(ZkStateReader.BASE_URL_PROP);
if (!checkCollectionKeyExistence(message)) return ZkStateWriter.NO_OP;
DocCollection coll = clusterState.getCollectionOrNull(collection);
if (coll == null) {
// make sure we delete the zk nodes for this collection just to be safe
return new ZkWriteCommand(collection, null);
}
Map<String, Slice> newSlices = new LinkedHashMap<>();
for (Slice slice : coll.getSlices()) {
Replica replica = slice.getReplica(cnn);
if (replica != null && (baseUrl == null || baseUrl.equals(replica.getBaseUrl()))) {
Map<String, Replica> newReplicas = slice.getReplicasCopy();
newReplicas.remove(cnn);
slice = new Slice(slice.getName(), newReplicas, slice.getProperties());
}
newSlices.put(slice.getName(), slice);
}
return new ZkWriteCommand(collection, coll.copyWithSlices(newSlices));
}
public ZkWriteCommand setShardLeader(ClusterState clusterState, ZkNodeProps message) {
StringBuilder sb = new StringBuilder();
String baseUrl = message.getStr(ZkStateReader.BASE_URL_PROP);
String coreName = message.getStr(ZkStateReader.CORE_NAME_PROP);
sb.append(baseUrl);
if (baseUrl != null && !baseUrl.endsWith("/")) sb.append("/");
sb.append(coreName == null ? "" : coreName);
if (!(sb.substring(sb.length() - 1).equals("/"))) sb.append("/");
String leaderUrl = sb.length() > 0 ? sb.toString() : null;
String collectionName = message.getStr(ZkStateReader.COLLECTION_PROP);
String sliceName = message.getStr(ZkStateReader.SHARD_ID_PROP);
DocCollection coll = clusterState.getCollectionOrNull(collectionName);
if (coll == null) {
log.error("Could not mark shard leader for non existing collection:" + collectionName);
return ZkStateWriter.NO_OP;
}
Map<String, Slice> slices = coll.getSlicesMap();
Slice slice = slices.get(sliceName);
Replica oldLeader = slice.getLeader();
final Map<String, Replica> newReplicas = new LinkedHashMap<>();
for (Replica replica : slice.getReplicas()) {
// TODO: this should only be calculated once and cached somewhere?
String coreURL = ZkCoreNodeProps.getCoreUrl(replica.getStr(ZkStateReader.BASE_URL_PROP), replica.getStr(ZkStateReader.CORE_NAME_PROP));
if (replica == oldLeader && !coreURL.equals(leaderUrl)) {
replica = new ReplicaMutator(zkStateReader).unsetLeader(replica);
} else if (coreURL.equals(leaderUrl)) {
replica = new ReplicaMutator(zkStateReader).setLeader(replica);
}
newReplicas.put(replica.getName(), replica);
}
Map<String, Object> newSliceProps = slice.shallowCopy();
newSliceProps.put(Slice.REPLICAS, newReplicas);
slice = new Slice(slice.getName(), newReplicas, slice.getProperties());
return new ZkWriteCommand(collectionName, CollectionMutator.updateSlice(collectionName, coll, slice));
}
public ZkWriteCommand updateShardState(ClusterState clusterState, ZkNodeProps message) {
String collectionName = message.getStr(ZkStateReader.COLLECTION_PROP);
if (!checkCollectionKeyExistence(message)) return ZkStateWriter.NO_OP;
log.info("Update shard state invoked for collection: " + collectionName + " with message: " + message);
DocCollection collection = clusterState.getCollection(collectionName);
Map<String, Slice> slicesCopy = new LinkedHashMap<>(collection.getSlicesMap());
for (String key : message.keySet()) {
if (ZkStateReader.COLLECTION_PROP.equals(key)) continue;
if (Overseer.QUEUE_OPERATION.equals(key)) continue;
Slice slice = collection.getSlice(key);
if (slice == null) {
throw new RuntimeException("Overseer.updateShardState unknown collection: " + collectionName + " slice: " + key);
}
log.info("Update shard state " + key + " to " + message.getStr(key));
Map<String, Object> props = slice.shallowCopy();
if (Slice.State.getState(message.getStr(key)) == Slice.State.ACTIVE) {
props.remove(Slice.PARENT);
props.remove("shard_parent_node");
props.remove("shard_parent_zk_session");
}
props.put(ZkStateReader.STATE_PROP, message.getStr(key));
Slice newSlice = new Slice(slice.getName(), slice.getReplicasCopy(), props);
slicesCopy.put(slice.getName(), newSlice);
}
return new ZkWriteCommand(collectionName, collection.copyWithSlices(slicesCopy));
}
public ZkWriteCommand addRoutingRule(final ClusterState clusterState, ZkNodeProps message) {
String collectionName = message.getStr(ZkStateReader.COLLECTION_PROP);
if (!checkCollectionKeyExistence(message)) return ZkStateWriter.NO_OP;
String shard = message.getStr(ZkStateReader.SHARD_ID_PROP);
String routeKey = message.getStr("routeKey");
String range = message.getStr("range");
String targetCollection = message.getStr("targetCollection");
String expireAt = message.getStr("expireAt");
DocCollection collection = clusterState.getCollection(collectionName);
Slice slice = collection.getSlice(shard);
if (slice == null) {
throw new RuntimeException("Overseer.addRoutingRule unknown collection: " + collectionName + " slice:" + shard);
}
Map<String, RoutingRule> routingRules = slice.getRoutingRules();
if (routingRules == null)
routingRules = new HashMap<>();
RoutingRule r = routingRules.get(routeKey);
if (r == null) {
Map<String, Object> map = new HashMap<>();
map.put("routeRanges", range);
map.put("targetCollection", targetCollection);
map.put("expireAt", expireAt);
RoutingRule rule = new RoutingRule(routeKey, map);
routingRules.put(routeKey, rule);
} else {
// add this range
Map<String, Object> map = r.shallowCopy();
map.put("routeRanges", map.get("routeRanges") + "," + range);
map.put("expireAt", expireAt);
routingRules.put(routeKey, new RoutingRule(routeKey, map));
}
Map<String, Object> props = slice.shallowCopy();
props.put("routingRules", routingRules);
Slice newSlice = new Slice(slice.getName(), slice.getReplicasCopy(), props);
return new ZkWriteCommand(collectionName,
CollectionMutator.updateSlice(collectionName, collection, newSlice));
}
public ZkWriteCommand removeRoutingRule(final ClusterState clusterState, ZkNodeProps message) {
String collectionName = message.getStr(ZkStateReader.COLLECTION_PROP);
if (!checkCollectionKeyExistence(message)) return ZkStateWriter.NO_OP;
String shard = message.getStr(ZkStateReader.SHARD_ID_PROP);
String routeKeyStr = message.getStr("routeKey");
log.info("Overseer.removeRoutingRule invoked for collection: " + collectionName
+ " shard: " + shard + " routeKey: " + routeKeyStr);
DocCollection collection = clusterState.getCollection(collectionName);
Slice slice = collection.getSlice(shard);
if (slice == null) {
log.warn("Unknown collection: " + collectionName + " shard: " + shard);
return ZkStateWriter.NO_OP;
}
Map<String, RoutingRule> routingRules = slice.getRoutingRules();
if (routingRules != null) {
routingRules.remove(routeKeyStr); // no rules left
Map<String, Object> props = slice.shallowCopy();
props.put("routingRules", routingRules);
Slice newSlice = new Slice(slice.getName(), slice.getReplicasCopy(), props);
return new ZkWriteCommand(collectionName,
CollectionMutator.updateSlice(collectionName, collection, newSlice));
}
return ZkStateWriter.NO_OP;
}
public static DocCollection updateReplica(DocCollection collection, final Slice slice, String coreNodeName, final Replica replica) {
Map<String, Replica> copy = slice.getReplicasCopy();
if (replica == null) {
copy.remove(coreNodeName);
} else {
copy.put(replica.getName(), replica);
}
Slice newSlice = new Slice(slice.getName(), copy, slice.getProperties());
return CollectionMutator.updateSlice(collection.getName(), collection, newSlice);
}
}