1 files changed, 119 insertions, 0 deletions
diff --git a/catalog-fe/src/main/java/org/openecomp/sdc/fe/impl/HealthCheckService.java b/catalog-fe/src/main/java/org/openecomp/sdc/fe/impl/HealthCheckService.java
new file mode 100644
index 0000000000..d5cfaeca7e
--- /dev/null
+++ b/catalog-fe/src/main/java/org/openecomp/sdc/fe/impl/HealthCheckService.java
@@ -0,0 +1,119 @@
+/*-
+ * ============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.impl;
+
+import org.openecomp.sdc.common.api.Constants;
+import org.openecomp.sdc.common.log.wrappers.Logger;
+import org.openecomp.sdc.fe.config.Configuration;
+import org.openecomp.sdc.fe.config.ConfigurationManager;
+
+import javax.servlet.ServletContext;
+import javax.ws.rs.core.Response;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+
+public class HealthCheckService {
+
+    private static final Logger healthLogger = Logger.getLogger("asdc.fe.healthcheck");
+    /**
+     * This executor will execute the health check task.
+     */
+    private ScheduledExecutorService healthCheckExecutor =
+            Executors.newSingleThreadScheduledExecutor((Runnable r) -> new Thread(r, "FE-Health-Check-Thread"));
+
+    private final HealthCheckScheduledTask task ;
+
+
+    public HealthCheckService(ServletContext context) {
+        this.context = context;
+        this.task = new HealthCheckScheduledTask(this);
+    }
+
+    public Configuration getConfig(){
+        return ((ConfigurationManager) context.getAttribute(Constants.CONFIGURATION_MANAGER_ATTR))
+                .getConfiguration();
+    }
+
+    void setLastHealthStatus(HealthStatus lastHealthStatus) {
+        this.lastHealthStatus = lastHealthStatus;
+    }
+
+    private HealthStatus lastHealthStatus = new HealthStatus(500, "{}");
+    private ServletContext context;
+
+    public void start(int interval) {
+        this.healthCheckExecutor.scheduleAtFixedRate( getTask() , 0, interval, TimeUnit.SECONDS);
+    }
+
+    /**
+     * To be used by the HealthCheckServlet
+     *
+     * @return
+     */
+    public Response getFeHealth() {
+        return this.buildResponse(lastHealthStatus);
+    }
+
+    private Response buildResponse(HealthStatus healthStatus) {
+        healthLogger.trace("FE and BE health check status: {}", healthStatus.getBody());
+        return Response.status(healthStatus.getStatusCode()).entity(healthStatus.getBody()).build();
+    }
+
+    public HealthStatus getLastHealthStatus() {
+        return lastHealthStatus;
+    }
+    public HealthCheckScheduledTask getTask() {
+        return task;
+    }
+
+    //immutable
+    static class HealthStatus {
+
+        public void setBody(String body) {
+            this.body = body;
+        }
+
+        public void setStatusCode(int statusCode) {
+            this.statusCode = statusCode;
+        }
+
+        private String body;
+        private int statusCode;
+
+        public HealthStatus(int code, String body) {
+            this.body = body;
+            this.statusCode = code;
+        }
+
+        public int getStatusCode() {
+            return statusCode;
+        }
+
+        public String getBody() {
+            return body;
+        }
+    }
+
+
+
+}