| /* |
| * 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. |
| */ |
| |
| package org.apache.cassandra.locator; |
| |
| import com.google.common.base.Preconditions; |
| |
| import org.apache.cassandra.db.Keyspace; |
| import org.apache.cassandra.dht.Token; |
| import org.apache.cassandra.schema.TableMetadata; |
| import org.apache.cassandra.service.StorageService; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| |
| /** |
| * A ReplicaCollection where all Replica are required to cover a range that fully contains the token() defined in the builder(). |
| * Endpoints are guaranteed to be unique; on construction, this is enforced unless optionally silenced (in which case |
| * only the first occurrence makes the cut). |
| */ |
| public class EndpointsForToken extends Endpoints<EndpointsForToken> |
| { |
| private final Token token; |
| |
| EndpointsForToken(Token token, ReplicaList list, ReplicaMap<InetAddressAndPort> byEndpoint) |
| { |
| super(list, byEndpoint); |
| this.token = token; |
| assert token != null; |
| } |
| |
| public Token token() |
| { |
| return token; |
| } |
| |
| @Override |
| public Builder newBuilder(int initialCapacity) |
| { |
| return new Builder(token, initialCapacity); |
| } |
| |
| @Override |
| public EndpointsForToken snapshot() |
| { |
| return this; |
| } |
| |
| @Override |
| protected EndpointsForToken snapshot(ReplicaList newList) |
| { |
| if (newList.isEmpty()) return empty(token); |
| ReplicaMap<InetAddressAndPort> byEndpoint = null; |
| if (this.byEndpoint != null && list.isSubList(newList)) |
| byEndpoint = this.byEndpoint.forSubList(newList); |
| return new EndpointsForToken(token, newList, byEndpoint); |
| } |
| |
| public Replica lookup(InetAddressAndPort endpoint) |
| { |
| return byEndpoint().get(endpoint); |
| } |
| |
| public static class Builder extends EndpointsForToken implements ReplicaCollection.Builder<EndpointsForToken> |
| { |
| boolean built; |
| public Builder(Token token) { this(token, 0); } |
| public Builder(Token token, int capacity) { this(token, new ReplicaList(capacity)); } |
| private Builder(Token token, ReplicaList list) { super(token, list, endpointMap(list)); } |
| |
| public EndpointsForToken.Builder add(Replica replica, Conflict ignoreConflict) |
| { |
| if (built) throw new IllegalStateException(); |
| Preconditions.checkNotNull(replica); |
| if (!replica.range().contains(super.token)) |
| throw new IllegalArgumentException("Replica " + replica + " does not contain " + super.token); |
| |
| if (!super.byEndpoint.internalPutIfAbsent(replica, list.size())) |
| { |
| switch (ignoreConflict) |
| { |
| case DUPLICATE: |
| if (byEndpoint().get(replica.endpoint()).equals(replica)) |
| break; |
| case NONE: |
| throw new IllegalArgumentException("Conflicting replica added (expected unique endpoints): " |
| + replica + "; existing: " + byEndpoint().get(replica.endpoint())); |
| case ALL: |
| } |
| return this; |
| } |
| |
| list.add(replica); |
| return this; |
| } |
| |
| @Override |
| public EndpointsForToken snapshot() |
| { |
| return snapshot(list.subList(0, list.size())); |
| } |
| |
| public EndpointsForToken build() |
| { |
| built = true; |
| return new EndpointsForToken(super.token, super.list, super.byEndpoint); |
| } |
| } |
| |
| public static Builder builder(Token token) |
| { |
| return new Builder(token); |
| } |
| public static Builder builder(Token token, int capacity) |
| { |
| return new Builder(token, capacity); |
| } |
| |
| public static EndpointsForToken empty(Token token) |
| { |
| return new EndpointsForToken(token, EMPTY_LIST, EMPTY_MAP); |
| } |
| |
| public static EndpointsForToken of(Token token, Replica replica) |
| { |
| // we only use ArrayList or ArrayList.SubList, to ensure callsites are bimorphic |
| ReplicaList one = new ReplicaList(1); |
| one.add(replica); |
| // we can safely use singletonMap, as we only otherwise use LinkedHashMap |
| return new EndpointsForToken(token, one, endpointMap(one)); |
| } |
| |
| public static EndpointsForToken of(Token token, Replica ... replicas) |
| { |
| return copyOf(token, Arrays.asList(replicas)); |
| } |
| |
| public static EndpointsForToken copyOf(Token token, Collection<Replica> replicas) |
| { |
| if (replicas.isEmpty()) return empty(token); |
| return builder(token, replicas.size()).addAll(replicas).build(); |
| } |
| |
| public static EndpointsForToken natural(Keyspace keyspace, Token token) |
| { |
| return keyspace.getReplicationStrategy().getNaturalReplicasForToken(token); |
| } |
| |
| public static EndpointsForToken natural(AbstractReplicationStrategy replicationStrategy, Token token) |
| { |
| return replicationStrategy.getNaturalReplicasForToken(token); |
| } |
| |
| public static EndpointsForToken natural(TableMetadata table, Token token) |
| { |
| return natural(Keyspace.open(table.keyspace), token); |
| } |
| |
| public static EndpointsForToken pending(TableMetadata table, Token token) |
| { |
| return pending(table.keyspace, token); |
| } |
| |
| public static EndpointsForToken pending(Keyspace keyspace, Token token) |
| { |
| return pending(keyspace.getName(), token); |
| } |
| |
| public static EndpointsForToken pending(String keyspace, Token token) |
| { |
| return StorageService.instance.getTokenMetadata().pendingEndpointsForToken(token, keyspace); |
| } |
| } |