/**
* 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 com.seyren.core.service.notification;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.inject.Inject;
import javax.inject.Named;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.commons.lang.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.HttpClientUtils;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.seyren.core.domain.Alert;
import com.seyren.core.domain.Check;
import com.seyren.core.domain.Subscription;
import com.seyren.core.domain.SubscriptionType;
import com.seyren.core.exception.NotificationFailedException;
import com.seyren.core.util.config.SeyrenConfig;
@Named
public class HttpNotificationService implements NotificationService {
private static final Logger LOGGER = LoggerFactory.getLogger(HttpNotificationService.class);
private static final ObjectMapper MAPPER = new ObjectMapper();
private final SeyrenConfig seyrenConfig;
@Inject
public HttpNotificationService(SeyrenConfig seyrenConfig) {
this.seyrenConfig = seyrenConfig;
}
@Override
public void sendNotification(Check check, Subscription subscription, List<Alert> alerts) throws NotificationFailedException {
String httpUrl = StringUtils.trimToNull(subscription.getTarget());
if (httpUrl == null) {
LOGGER.warn("URL needs to be set before sending notifications to HTTP");
return;
}
Map<String, Object> body = new HashMap<String, Object>();
body.put("seyrenUrl", seyrenConfig.getBaseUrl());
body.put("check", check);
body.put("subscription", subscription);
body.put("alerts", alerts);
body.put("preview", getPreviewImage(check));
HttpClient client = HttpClientBuilder.create().build();
HttpPost post = new HttpPost(subscription.getTarget());
try {
HttpEntity entity = new StringEntity(MAPPER.writeValueAsString(body), ContentType.APPLICATION_JSON);
post.setEntity(entity);
HttpResponse response = client.execute(post);
HttpEntity responseEntity = response.getEntity();
if(responseEntity!=null) {
LOGGER.info("Response : {} ", EntityUtils.toString(responseEntity));
}
} catch (Exception e) {
throw new NotificationFailedException("Failed to send notification to HTTP", e);
} finally {
post.releaseConnection();
HttpClientUtils.closeQuietly(client);
}
}
@Override
public boolean canHandle(SubscriptionType subscriptionType) {
return subscriptionType == SubscriptionType.HTTP;
}
private String getPreviewImage(Check check)
{
return "<br /><img src=" + seyrenConfig.getGraphiteUrl() + "/render/?target=" + check.getTarget() + getTimeFromUntilString(new Date()) +
"&target=alias(dashed(color(constantLine(" + check.getWarn().toString() + "),%22yellow%22)),%22warn%20level%22)&target=alias(dashed(color(constantLine(" + check.getError().toString()
+ "),%22red%22)),%22error%20level%22)&width=500&height=225></img>";
}
private String getTimeFromUntilString(Date date)
{
Calendar cal = Calendar.getInstance();
SimpleDateFormat format = new SimpleDateFormat("HH:mm_yyyyMMdd");
cal.setTime(date);
cal.add(Calendar.HOUR, -1);
String from = format.format(cal.getTime());
cal.add(Calendar.HOUR, 1);
String until = format.format(cal.getTime());
return "&from=" + until.toString() + "&until=" + from.toString();
}
}