| /* |
| * 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 javax.ws.rs.GET; |
| import javax.ws.rs.Path; |
| import javax.ws.rs.Produces; |
| import javax.ws.rs.core.MediaType; |
| import javax.ws.rs.core.Response; |
| |
| import com.google.common.collect.ImmutableMap; |
| |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import io.netty.handler.codec.http.HttpResponseStatus; |
| import io.swagger.v3.oas.annotations.Operation; |
| import io.swagger.v3.oas.annotations.responses.ApiResponse; |
| import io.vertx.core.json.Json; |
| import io.vertx.core.logging.Logger; |
| import io.vertx.core.logging.LoggerFactory; |
| import org.apache.cassandra.sidecar.common.CassandraAdapterDelegate; |
| |
| /** |
| * Provides a simple REST endpoint to determine if a node is available |
| */ |
| @Singleton |
| @Path("/api/v1/cassandra/__health") |
| public class CassandraHealthService |
| { |
| private static final Logger logger = LoggerFactory.getLogger(HealthService.class); |
| private final CassandraAdapterDelegate cassandra; |
| |
| @Inject |
| public CassandraHealthService(CassandraAdapterDelegate cassandra) |
| { |
| this.cassandra = cassandra; |
| } |
| |
| @Operation(summary = "Health Check for Cassandra's status", |
| description = "Returns HTTP 200 if Cassandra is available, 503 otherwise", |
| responses = { |
| @ApiResponse(responseCode = "200", description = "Cassandra is available"), |
| @ApiResponse(responseCode = "503", description = "Cassandra is not available") |
| }) |
| @Produces(MediaType.APPLICATION_JSON) |
| @GET |
| public Response getCassandraHealth() |
| { |
| Boolean up = cassandra.isUp(); |
| int status = up ? HttpResponseStatus.OK.code() : HttpResponseStatus.SERVICE_UNAVAILABLE.code(); |
| return Response.status(status).entity(Json.encode(ImmutableMap.of("status", up ? |
| "OK" : "NOT_OK"))).build(); |
| } |
| } |