1 files changed, 140 insertions, 0 deletions
diff --git a/common-app-api/src/main/java/org/openecomp/sdc/fe/monitoring/FeMonitoringService.java b/common-app-api/src/main/java/org/openecomp/sdc/fe/monitoring/FeMonitoringService.java
new file mode 100644
index 0000000000..482be7697d
--- /dev/null
+++ b/common-app-api/src/main/java/org/openecomp/sdc/fe/monitoring/FeMonitoringService.java
@@ -0,0 +1,140 @@
+/*-
+ * ============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.fe.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.common.api.Constants;
+import org.openecomp.sdc.common.monitoring.MonitoringEvent;
+import org.openecomp.sdc.common.monitoring.MonitoringMetricsFetcher;
+import org.openecomp.sdc.fe.config.Configuration;
+import org.openecomp.sdc.fe.config.ConfigurationManager;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+public class FeMonitoringService {
+
+	private static final String URL = "%s://%s:%s/sdc2/rest/monitoring";
+	private static Logger monitoringLogger = LoggerFactory.getLogger("asdc.fe.monitoring.service");
+	private static Logger log = LoggerFactory.getLogger(FeMonitoringService.class.getName());
+	private static Gson gson = new GsonBuilder().setPrettyPrinting().create();
+
+	private class MonitoringScheduledTask implements Runnable {
+		@Override
+		public void run() {
+			monitoringLogger.trace("Executing FE Monitoring Task - Start");
+			MonitoringEvent monitoringMetrics = MonitoringMetricsFetcher.getInstance().getMonitoringMetrics();
+			processMonitoringEvent(monitoringMetrics);
+			monitoringLogger.trace("Executing FE 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, "FE-Monitoring-Thread");
+		}
+	});
+	private ServletContext context;
+
+	public FeMonitoringService(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("FE monitoring service enabled, interval is {} seconds", interval);
+			this.monitoringExecutor.scheduleAtFixedRate(new MonitoringScheduledTask(), 0, interval, TimeUnit.SECONDS);
+		} else {
+			log.info("FE 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.getBeHost(),
+					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();
+	}
+}