Extracted high abstraction for tasks

*First of all, all tasks were defined as
implementation.

*All tasks class have been injected into spring container.

Change-Id: I00337b49ed1de3f1b8cadf64f774f19377ae349e
Issue-ID: DCAEGEN2-443
Signed-off-by: wasala <przemyslaw.wasala@nokia.com>

13 files changed, 335 insertions, 49 deletions

diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/configuration/PrhAppConfig.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/configuration/PrhAppConfig.java
index 57335eff..19fcb8b8 100644
--- a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/configuration/PrhAppConfig.java
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/configuration/PrhAppConfig.java
@@ -1,4 +1,4 @@
-/*-
+/*
  * ============LICENSE_START=======================================================
  * PNF-REGISTRATION-HANDLER
  * ================================================================================
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/controllers/ScheduleController.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/controllers/ScheduleController.java
index a0739637..99516c46 100644
--- a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/controllers/ScheduleController.java
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/controllers/ScheduleController.java
@@ -20,7 +20,7 @@
 package org.onap.dcaegen2.services.prh.controllers;
 
 import java.util.concurrent.ScheduledFuture;
-import org.onap.dcaegen2.services.prh.tasks.ScheduledTask;
+import org.onap.dcaegen2.services.prh.tasks.ScheduledTasks;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -40,12 +40,12 @@ public class ScheduleController {
     private static final int SCHEDULING_DELAY = 20000;
 
     private final TaskScheduler taskScheduler;
-    private final ScheduledTask scheduledTask;
+    private final ScheduledTasks scheduledTask;
 
     private ScheduledFuture<?> scheduledFuture;
 
     @Autowired
-    public ScheduleController(TaskScheduler taskScheduler, ScheduledTask scheduledTask) {
+    public ScheduleController(TaskScheduler taskScheduler, ScheduledTasks scheduledTask) {
         this.taskScheduler = taskScheduler;
         this.scheduledTask = scheduledTask;
     }
@@ -54,7 +54,7 @@ public class ScheduleController {
     @RequestMapping(value = "preferences", method = RequestMethod.PUT)
     public ResponseEntity<Void> startTask() {
         scheduledFuture = taskScheduler
-            .scheduleWithFixedDelay(scheduledTask::scheduledTaskAskingDMaaPOfConsumeEvent, SCHEDULING_DELAY);
+            .scheduleWithFixedDelay(scheduledTask::scheduleMainPrhEventTask, SCHEDULING_DELAY);
         return new ResponseEntity<>(HttpStatus.OK);
     }
 
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/exceptions/AAINotFoundException.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/exceptions/AAINotFoundException.java
index e54d158e..a01abc56 100644
--- a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/exceptions/AAINotFoundException.java
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/exceptions/AAINotFoundException.java
@@ -22,7 +22,7 @@ package org.onap.dcaegen2.services.prh.exceptions;
 /**
  * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 3/23/18
  */
-public class AAINotFoundException extends Exception {
+public class AAINotFoundException extends PrhTaskException {
 
     public AAINotFoundException(String message) {
         super(message);
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/exceptions/DmaapNotFoundException.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/exceptions/DmaapNotFoundException.java
new file mode 100644
index 00000000..af22284f
--- /dev/null
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/exceptions/DmaapNotFoundException.java
@@ -0,0 +1,30 @@
+/*
+ * ============LICENSE_START=======================================================
+ * PNF-REGISTRATION-HANDLER
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA 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.onap.dcaegen2.services.prh.exceptions;
+
+/**
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/13/18
+ */
+public class DmaapNotFoundException extends PrhTaskException {
+
+    public DmaapNotFoundException(String message) {
+        super(message);
+    }
+}
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/exceptions/PrhTaskException.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/exceptions/PrhTaskException.java
new file mode 100644
index 00000000..646ca7e7
--- /dev/null
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/exceptions/PrhTaskException.java
@@ -0,0 +1,30 @@
+/*
+ * ============LICENSE_START=======================================================
+ * PNF-REGISTRATION-HANDLER
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA 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.onap.dcaegen2.services.prh.exceptions;
+
+/**
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/13/18
+ */
+public class PrhTaskException extends Exception {
+
+    public PrhTaskException(String message) {
+        super(message);
+    }
+}
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapTask.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/AAIPublisherTask.java
index 0032a3e1..87a70810 100644
--- a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapTask.java
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/AAIPublisherTask.java
@@ -1,4 +1,4 @@
-/*-
+/*
  * ============LICENSE_START=======================================================
  * PNF-REGISTRATION-HANDLER
  * ================================================================================
@@ -22,11 +22,9 @@ package org.onap.dcaegen2.services.prh.tasks;
 import org.onap.dcaegen2.services.prh.exceptions.AAINotFoundException;
 
 /**
- * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 3/23/18
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/13/18
  */
-@FunctionalInterface
-public interface DmaapTask {
-
-    void execute() throws AAINotFoundException;
+public abstract class AAIPublisherTask implements Task {
 
+    protected abstract void publish() throws AAINotFoundException;
 }
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/AAIPublisherTaskImpl.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/AAIPublisherTaskImpl.java
new file mode 100644
index 00000000..d4efea4f
--- /dev/null
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/AAIPublisherTaskImpl.java
@@ -0,0 +1,60 @@
+/*
+ * ============LICENSE_START=======================================================
+ * PNF-REGISTRATION-HANDLER
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA 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.onap.dcaegen2.services.prh.tasks;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import org.onap.dcaegen2.services.prh.configuration.AppConfig;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+/**
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/13/18
+ */
+@Component
+public class AAIPublisherTaskImpl extends AAIPublisherTask {
+
+    private static final Logger logger = LoggerFactory.getLogger(ScheduledTasks.class);
+    private static final DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("HH:mm:ss");
+
+    @Autowired
+    public AppConfig prhAppConfig;
+
+    @Override
+    protected void publish() {
+        logger.debug("Start task DmaapConsumerTask::publish() :: Execution Time - {}", dateTimeFormatter.format(
+            LocalDateTime.now()));
+
+        logger.debug("End task DmaapConsumerTask::publish() :: Execution Time - {}", dateTimeFormatter.format(
+            LocalDateTime.now()));
+    }
+
+    @Override
+    public void execute() {
+        logger.debug("Start task AAIPublisherTaskImpl::execute() :: Execution Time - {}", dateTimeFormatter.format(
+            LocalDateTime.now()));
+
+        logger.debug("End task AAIPublisherTaskImpl::execute() :: Execution Time - {}", dateTimeFormatter.format(
+            LocalDateTime.now()));
+
+    }
+}
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTask.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTask.java
index 2dc9b730..41031664 100644
--- a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTask.java
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTask.java
@@ -1,6 +1,6 @@
-/*-
+/*
  * ============LICENSE_START=======================================================
- * PNF-REGISTRATION-HANDLER
+ * PROJECT
  * ================================================================================
  * Copyright (C) 2018 NOKIA Intellectual Property. All rights reserved.
  * ================================================================================
@@ -19,34 +19,12 @@
  */
 package org.onap.dcaegen2.services.prh.tasks;
 
-import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
-import org.onap.dcaegen2.services.prh.configuration.AppConfig;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Component;
+import org.onap.dcaegen2.services.prh.exceptions.DmaapNotFoundException;
 
 /**
- * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 3/23/18
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/13/18
  */
-@Component
-public class DmaapConsumerTask implements DmaapTask {
+public abstract class DmaapConsumerTask implements Task {
 
-
-    private static final Logger logger = LoggerFactory.getLogger(DmaapConsumerTask.class);
-    private static final DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("HH:mm:ss");
-
-    @Autowired
-    public AppConfig prhAppConfig;
-
-    @Override
-    public void execute() {
-
-        logger.debug("Start task DmaapConsumerTask::execute() :: Execution Time - {}", dateTimeFormatter.format(
-            LocalDateTime.now()));
-
-        logger.debug("End task DmaapConsumerTask::execute() :: Execution Time - {}",
-            dateTimeFormatter.format(LocalDateTime.now()));
-    }
-}
\ No newline at end of file
+    protected abstract void consume() throws DmaapNotFoundException;
+}
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTaskImpl.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTaskImpl.java
new file mode 100644
index 00000000..57f97778
--- /dev/null
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapConsumerTaskImpl.java
@@ -0,0 +1,61 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * PNF-REGISTRATION-HANDLER
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA 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.onap.dcaegen2.services.prh.tasks;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import org.onap.dcaegen2.services.prh.configuration.AppConfig;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+/**
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 3/23/18
+ */
+@Component
+public class DmaapConsumerTaskImpl extends DmaapConsumerTask {
+
+
+    private static final Logger logger = LoggerFactory.getLogger(DmaapConsumerTaskImpl.class);
+    private static final DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("HH:mm:ss");
+
+    @Autowired
+    public AppConfig prhAppConfig;
+
+    @Override
+    public void execute() {
+        logger.debug("Start task DmaapConsumerTask::execute() :: Execution Time - {}", dateTimeFormatter.format(
+            LocalDateTime.now()));
+
+        logger.debug("End task DmaapConsumerTask::execute() :: Execution Time - {}",
+            dateTimeFormatter.format(LocalDateTime.now()));
+    }
+
+    @Override
+    protected void consume() {
+        logger.debug("Start task DmaapConsumerTask::consume() :: Execution Time - {}", dateTimeFormatter.format(
+            LocalDateTime.now()));
+
+        logger.debug("End task DmaapConsumerTask::consume() :: Execution Time - {}",
+            dateTimeFormatter.format(LocalDateTime.now()));
+
+    }
+}
\ No newline at end of file
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapPublisherTask.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapPublisherTask.java
new file mode 100644
index 00000000..d203c8c5
--- /dev/null
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapPublisherTask.java
@@ -0,0 +1,31 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * PNF-REGISTRATION-HANDLER
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA 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.onap.dcaegen2.services.prh.tasks;
+
+import org.onap.dcaegen2.services.prh.exceptions.DmaapNotFoundException;
+
+/**
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 3/23/18
+ */
+public abstract class DmaapPublisherTask implements Task {
+
+    protected abstract void publish() throws DmaapNotFoundException;
+
+}
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapPublisherTaskImpl.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapPublisherTaskImpl.java
new file mode 100644
index 00000000..92eb875c
--- /dev/null
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/DmaapPublisherTaskImpl.java
@@ -0,0 +1,59 @@
+/*
+ * ============LICENSE_START=======================================================
+ * PROJECT
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA 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.onap.dcaegen2.services.prh.tasks;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import org.onap.dcaegen2.services.prh.configuration.AppConfig;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+/**
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/13/18
+ */
+@Component
+public class DmaapPublisherTaskImpl extends DmaapPublisherTask {
+
+    private static final Logger logger = LoggerFactory.getLogger(ScheduledTasks.class);
+    private static final DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("HH:mm:ss");
+
+    @Autowired
+    public AppConfig prhAppConfig;
+
+    @Override
+    public void execute() {
+        logger.debug("Start task DmaapPublisherTask::consume() :: Execution Time - {}", dateTimeFormatter.format(
+            LocalDateTime.now()));
+
+        logger.debug("End task DmaapPublisherTask::consume() :: Execution Time - {}",
+            dateTimeFormatter.format(LocalDateTime.now()));
+    }
+
+    @Override
+    protected void publish() {
+        logger.debug("Start task DmaapPublisherTask::publish() :: Execution Time - {}", dateTimeFormatter.format(
+            LocalDateTime.now()));
+
+        logger.debug("End task DmaapPublisherTask::publish() :: Execution Time - {}",
+            dateTimeFormatter.format(LocalDateTime.now()));
+    }
+}
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/ScheduledTask.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/ScheduledTasks.java
index b0466421..713f5d48 100644
--- a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/ScheduledTask.java
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/ScheduledTasks.java
@@ -21,7 +21,7 @@ package org.onap.dcaegen2.services.prh.tasks;
 
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
-import org.onap.dcaegen2.services.prh.exceptions.AAINotFoundException;
+import org.onap.dcaegen2.services.prh.exceptions.PrhTaskException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -31,26 +31,33 @@ import org.springframework.stereotype.Component;
  * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 3/23/18
  */
 @Component
-public class ScheduledTask {
+public class ScheduledTasks {
 
-    private static final Logger logger = LoggerFactory.getLogger(ScheduledTask.class);
+    private static final Logger logger = LoggerFactory.getLogger(ScheduledTasks.class);
     private static final DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("HH:mm:ss");
 
-    private final DmaapTask dmaapConsumerTask;
+    private final DmaapConsumerTask dmaapConsumerTask;
+    private final DmaapPublisherTask dmaapPublisherTask;
+    private final AAIPublisherTask aaiPublisherTask;
 
     @Autowired
-    public ScheduledTask(DmaapTask dmaapConsumerTask) {
+    public ScheduledTasks(DmaapConsumerTask dmaapConsumerTask, DmaapPublisherTask dmaapPublisherTask,
+        AAIPublisherTask aaiPublisherTask) {
         this.dmaapConsumerTask = dmaapConsumerTask;
+        this.dmaapPublisherTask = dmaapPublisherTask;
+        this.aaiPublisherTask = aaiPublisherTask;
     }
 
-    public void scheduledTaskAskingDMaaPOfConsumeEvent() {
+    public void scheduleMainPrhEventTask() {
         logger.debug("Task scheduledTaskAskingDMaaPOfConsumeEvent() :: Execution Time - {}", dateTimeFormatter.format(
             LocalDateTime.now()));
         try {
             dmaapConsumerTask.execute();
-        } catch (AAINotFoundException e) {
+            dmaapPublisherTask.execute();
+            aaiPublisherTask.execute();
+        } catch (PrhTaskException e) {
             logger
-                .error("Task scheduledTaskAskingDMaaPOfConsumeEvent()::AAINotFoundException :: Execution Time - {}:{}",
+                .error("Task scheduledTaskAskingDMaaPOfConsumeEvent()::PrhTaskException :: Execution Time - {}:{}",
                     dateTimeFormatter.format(
                         LocalDateTime.now()), e);
         }
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/Task.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/Task.java
new file mode 100644
index 00000000..1bf8f6d3
--- /dev/null
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/Task.java
@@ -0,0 +1,32 @@
+/*
+ * ============LICENSE_START=======================================================
+ * PNF-REGISTRATION-HANDLER
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA 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.onap.dcaegen2.services.prh.tasks;
+
+import org.onap.dcaegen2.services.prh.exceptions.PrhTaskException;
+
+/**
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/13/18
+ */
+
+@FunctionalInterface
+public interface Task {
+
+    void execute() throws PrhTaskException;
+}