| /* |
| * 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.sidecar.routes; |
| |
| import org.apache.commons.lang3.StringUtils; |
| |
| import com.datastax.driver.core.Metadata; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import io.netty.handler.codec.http.HttpResponseStatus; |
| import io.vertx.core.http.HttpServerRequest; |
| import io.vertx.core.net.SocketAddress; |
| import io.vertx.ext.web.RoutingContext; |
| import org.apache.cassandra.sidecar.cluster.CassandraAdapterDelegate; |
| import org.apache.cassandra.sidecar.common.StorageOperations; |
| import org.apache.cassandra.sidecar.common.data.TokenRangeReplicasRequest; |
| import org.apache.cassandra.sidecar.concurrent.ExecutorPools; |
| import org.apache.cassandra.sidecar.utils.CassandraInputValidator; |
| import org.apache.cassandra.sidecar.utils.HttpExceptions; |
| import org.apache.cassandra.sidecar.utils.InstanceMetadataFetcher; |
| |
| import static org.apache.cassandra.sidecar.utils.HttpExceptions.cassandraServiceUnavailable; |
| |
| /** |
| * Handler which provides token range to read and write replica mapping |
| * |
| * <p>This handler provides token range replicas along with the state of the replicas. For the purpose |
| * of identifying the state of a newly joining node to replace a dead node from a newly joining node, |
| * a new state 'Replacing' has been added. |
| * It is represented by |
| * {@code org.apache.cassandra.sidecar.adapters.base.TokenRangeReplicaProvider.StateWithReplacement} |
| */ |
| @Singleton |
| public class TokenRangeReplicaMapHandler extends AbstractHandler<TokenRangeReplicasRequest> |
| { |
| |
| @Inject |
| public TokenRangeReplicaMapHandler(InstanceMetadataFetcher metadataFetcher, |
| CassandraInputValidator validator, |
| ExecutorPools executorPools) |
| { |
| super(metadataFetcher, executorPools, validator); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void handleInternal(RoutingContext context, |
| HttpServerRequest httpRequest, |
| String host, |
| SocketAddress remoteAddress, |
| TokenRangeReplicasRequest request) |
| { |
| CassandraAdapterDelegate delegate = metadataFetcher.delegate(host); |
| if (delegate == null) |
| { |
| context.fail(cassandraServiceUnavailable()); |
| return; |
| } |
| |
| StorageOperations operations = delegate.storageOperations(); |
| Metadata metadata = delegate.metadata(); |
| if (operations == null || metadata == null) |
| { |
| context.fail(cassandraServiceUnavailable()); |
| return; |
| } |
| |
| executorPools.service() |
| .executeBlocking(promise -> context.json(operations.tokenRangeReplicas(request.keyspace(), |
| metadata.getPartitioner())) |
| ).onFailure(cause -> processFailure(cause, context, host, remoteAddress, request)); |
| } |
| |
| @Override |
| protected TokenRangeReplicasRequest extractParamsOrThrow(RoutingContext context) |
| { |
| return new TokenRangeReplicasRequest(keyspace(context, true)); |
| } |
| |
| @Override |
| protected void processFailure(Throwable cause, RoutingContext context, String host, SocketAddress remoteAddress, |
| TokenRangeReplicasRequest request) |
| { |
| if (cause instanceof AssertionError && |
| StringUtils.contains(cause.getMessage(), "Unknown keyspace")) |
| { |
| context.fail(HttpExceptions.wrapHttpException(HttpResponseStatus.NOT_FOUND, cause.getMessage())); |
| return; |
| } |
| |
| super.processFailure(cause, context, host, remoteAddress, request); |
| } |
| } |