| /* |
| * 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.cassandra; |
| |
| |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| 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.NodeSettings; |
| import org.apache.cassandra.sidecar.concurrent.ExecutorPools; |
| import org.apache.cassandra.sidecar.routes.AbstractHandler; |
| import org.apache.cassandra.sidecar.utils.InstanceMetadataFetcher; |
| |
| import static org.apache.cassandra.sidecar.utils.HttpExceptions.cassandraServiceUnavailable; |
| |
| /** |
| * Provides REST endpoint to get the configured settings of a cassandra node |
| */ |
| @Singleton |
| public class NodeSettingsHandler extends AbstractHandler<Void> |
| { |
| /** |
| * Constructs a handler with the provided {@code metadataFetcher} |
| * |
| * @param metadataFetcher the interface to retrieve instance metadata |
| */ |
| @Inject |
| NodeSettingsHandler(InstanceMetadataFetcher metadataFetcher, ExecutorPools executorPools) |
| { |
| super(metadataFetcher, executorPools, null); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void handleInternal(RoutingContext context, |
| HttpServerRequest httpRequest, |
| String host, |
| SocketAddress remoteAddress, |
| Void request) |
| { |
| CassandraAdapterDelegate delegate = metadataFetcher.delegate(host); |
| if (delegate == null) |
| { |
| context.fail(cassandraServiceUnavailable()); |
| return; |
| } |
| NodeSettings nodeSettings = delegate.nodeSettings(); |
| if (nodeSettings == null) |
| { |
| context.fail(cassandraServiceUnavailable()); |
| } |
| else |
| { |
| context.json(nodeSettings); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| protected Void extractParamsOrThrow(RoutingContext context) |
| { |
| return null; |
| } |
| } |