arjunashok commented on code in PR #58: URL: https://github.com/apache/cassandra-sidecar/pull/58#discussion_r1307688445
########## src/main/java/org/apache/cassandra/sidecar/routes/TokenRangeReplicaMapHandler.java: ########## @@ -0,0 +1,114 @@ +/* + * 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 java.net.UnknownHostException; + +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 io.vertx.ext.web.handler.HttpException; +import org.apache.cassandra.sidecar.common.CassandraAdapterDelegate; +import org.apache.cassandra.sidecar.common.StorageOperations; +import org.apache.cassandra.sidecar.common.data.TokenRangeReplicasRequest; +import org.apache.cassandra.sidecar.common.utils.CassandraInputValidator; +import org.apache.cassandra.sidecar.concurrent.ExecutorPools; +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); + + StorageOperations storageOperations = delegate.storageOperations(); + Metadata metadata = delegate.metadata(); + if (storageOperations == null || metadata == null) + { + context.fail(cassandraServiceUnavailable()); + return; + } + + executorPools.service().executeBlocking(promise -> { + try + { + context.json(storageOperations.tokenRangeReplicas(request.keyspace(), metadata.getPartitioner())); + } + catch (UnknownHostException e) + { + processFailure(e, context, host, remoteAddress, request); Review Comment: Will update. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
