io.gravitee.node.monitoring.healthcheck.NodeHealthCheckManagementEndpoint Maven / Gradle / Ivy

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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * Licensed 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 io.gravitee.node.monitoring.healthcheck;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.gravitee.common.http.HttpHeaders;
import io.gravitee.common.http.HttpMethod;
import io.gravitee.common.http.HttpStatusCode;
import io.gravitee.common.http.MediaType;
import io.gravitee.node.api.healthcheck.Probe;
import io.gravitee.node.api.healthcheck.Result;
import io.gravitee.node.management.http.endpoint.ManagementEndpoint;
import io.vertx.core.http.HttpServerResponse;
import io.vertx.core.json.jackson.DatabindCodec;
import io.vertx.ext.web.RoutingContext;
import java.util.Map;
import java.util.stream.Collectors;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public class NodeHealthCheckManagementEndpoint implements ManagementEndpoint {

    private static final Logger LOGGER = LoggerFactory.getLogger(NodeHealthCheckManagementEndpoint.class);

    private NodeHealthCheckThread registry;

    final ObjectMapper objectMapper;

    public static final String PROBE_FILTER = "probes";

    public NodeHealthCheckManagementEndpoint() {
        objectMapper = DatabindCodec.prettyMapper();
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
    }

    @Override
    public HttpMethod method() {
        return HttpMethod.GET;
    }

    @Override
    public String path() {
        return "/health";
    }

    @Override
    public void handle(RoutingContext ctx) {
        Map probes = registry
            .getResults()
            .entrySet()
            .stream()
            .filter(entry ->
                ctx.queryParams().contains(PROBE_FILTER)
                    ? ctx.queryParams().get(PROBE_FILTER).contains(entry.getKey().id())
                    : entry.getKey().isVisibleByDefault()
            )
            .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));

        boolean healthyProbe = probes.values().stream().allMatch(Result::isHealthy);

        HttpServerResponse response = ctx.response();
        response.setStatusCode(healthyProbe ? HttpStatusCode.OK_200 : HttpStatusCode.INTERNAL_SERVER_ERROR_500);
        response.putHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON);
        response.setChunked(true);

        Map results = probes
            .entrySet()
            .stream()
            .collect(Collectors.toMap(probeResultEntry -> probeResultEntry.getKey().id(), Map.Entry::getValue));

        try {
            final ObjectMapper objectMapper = DatabindCodec.prettyMapper();
            response.write(objectMapper.writeValueAsString(results));
        } catch (JsonProcessingException e) {
            LOGGER.warn("Unable to encode health check result into json.", e);
        }

        // End the response
        response.end();
    }

    public void setRegistry(NodeHealthCheckThread registry) {
        this.registry = registry;
    }
}