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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.sdc.be.monitoring;
import java.io.IOException;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import javax.servlet.ServletContext;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.openecomp.sdc.be.config.Configuration;
import org.openecomp.sdc.be.config.ConfigurationManager;
import org.openecomp.sdc.common.api.Constants;
import org.openecomp.sdc.common.monitoring.MonitoringEvent;
import org.openecomp.sdc.common.monitoring.MonitoringMetricsFetcher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
public class BeMonitoringService {
private static final String URL = "%s://%s:%s/sdc2/rest/monitoring";
private static Logger monitoringLogger = LoggerFactory.getLogger("asdc.be.monitoring.service");
private static Logger log = LoggerFactory.getLogger(BeMonitoringService.class.getName());
private static Gson gson = new GsonBuilder().setPrettyPrinting().create();
private class MonitoringScheduledTask implements Runnable {
@Override
public void run() {
monitoringLogger.trace("Executing BE Monitoring Task - Start");
MonitoringEvent monitoringMetrics = MonitoringMetricsFetcher.getInstance().getMonitoringMetrics();
processMonitoringEvent(monitoringMetrics);
monitoringLogger.trace("Executing BE Monitoring Task - Status = {}", monitoringMetrics.toString());
}
}
/**
* This executor will execute the Monitoring task.
*/
ScheduledExecutorService monitoringExecutor = Executors.newSingleThreadScheduledExecutor(new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
return new Thread(r, "BE-Monitoring-Thread");
}
});
private ServletContext context;
public BeMonitoringService(ServletContext context) {
this.context = context;
}
public void start(int interval) {
Configuration config = ((ConfigurationManager) context.getAttribute(Constants.CONFIGURATION_MANAGER_ATTR)).getConfiguration();
if (config.getSystemMonitoring().getEnabled()) {
log.info("BE monitoring service is enabled, interval is {} seconds", interval);
this.monitoringExecutor.scheduleAtFixedRate(new MonitoringScheduledTask(), 0, interval, TimeUnit.SECONDS);
} else {
log.info("BE monitoring service is disabled");
}
}
private void processMonitoringEvent(MonitoringEvent monitoringMetrics) {
CloseableHttpClient httpClient = null;
try {
Configuration config = ((ConfigurationManager) context.getAttribute(Constants.CONFIGURATION_MANAGER_ATTR)).getConfiguration();
String redirectedUrl = String.format(URL, config.getBeProtocol(), config.getBeFqdn(), config.getBeHttpPort());
httpClient = getHttpClient(config);
HttpPost httpPost = new HttpPost(redirectedUrl);
String monitoringMetricsJson = gson.toJson(monitoringMetrics);
HttpEntity myEntity = new StringEntity(monitoringMetricsJson);
httpPost.setEntity(myEntity);
httpPost.setHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON);
int beResponseStatus;
CloseableHttpResponse beResponse;
try {
beResponse = httpClient.execute(httpPost);
beResponseStatus = beResponse.getStatusLine().getStatusCode();
if (beResponseStatus != HttpStatus.SC_OK) {
monitoringLogger.error("Unexpected HTTP response from BE : {}", beResponseStatus);
}
} catch (Exception e) {
monitoringLogger.error("Monitoring error when trying to connect to BE", e);
}
} catch (Exception e) {
monitoringLogger.error("Unexpected monitoring error", e);
} finally {
if (httpClient != null) {
try {
httpClient.close();
} catch (IOException e) {
}
}
}
}
private CloseableHttpClient getHttpClient(Configuration config) {
int timeout = 3000;
RequestConfig.Builder requestBuilder = RequestConfig.custom();
requestBuilder.setConnectTimeout(timeout).setConnectionRequestTimeout(timeout).setSocketTimeout(timeout);
HttpClientBuilder builder = HttpClientBuilder.create();
builder.setDefaultRequestConfig(requestBuilder.build());
return builder.build();
}
}
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