io.wcm.devops.maven.nodejsproxy.health.NodeJsDistHealthCheck.java Source code

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Here is the source code for io.wcm.devops.maven.nodejsproxy.health.NodeJsDistHealthCheck.java

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/*
 * #%L
 * wcm.io
 * %%
 * Copyright (C) 2015 wcm.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.
 * #L%
 */
package io.wcm.devops.maven.nodejsproxy.health;

import io.wcm.devops.maven.nodejsproxy.MavenProxyConfiguration;

import javax.servlet.http.HttpServletResponse;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.codahale.metrics.health.HealthCheck;

/**
 * Checks if the NodeJS root directory is available via HTTP.
 */
public class NodeJsDistHealthCheck extends HealthCheck {

    private final MavenProxyConfiguration config;
    private final CloseableHttpClient httpClient;

    private static final Logger log = LoggerFactory.getLogger(NodeJsDistHealthCheck.class);

    /**
     * @param config Configuration
     */
    public NodeJsDistHealthCheck(MavenProxyConfiguration config, CloseableHttpClient httpClient) {
        this.config = config;
        this.httpClient = httpClient;
    }

    @Override
    protected Result check() throws Exception {
        String url = config.getNodeJsBinariesRootUrl();

        log.info("Validate file: {}", url);
        HttpGet get = new HttpGet(url);
        HttpResponse response = httpClient.execute(get);
        try {
            if (response.getStatusLine().getStatusCode() == HttpServletResponse.SC_OK) {
                return Result.healthy();
            } else {
                return Result.unhealthy("Got status code " + response.getStatusLine().getStatusCode()
                        + " when accessing URL " + url);
            }
        } finally {
            EntityUtils.consumeQuietly(response.getEntity());
        }
    }

}