1 files changed, 135 insertions, 0 deletions
diff --git a/src/main/java/org/onap/a1pesimulator/service/fileready/RanFileReadyHolder.java b/src/main/java/org/onap/a1pesimulator/service/fileready/RanFileReadyHolder.java
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+++ b/src/main/java/org/onap/a1pesimulator/service/fileready/RanFileReadyHolder.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2021 Samsung Electronics
+ * 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 org.onap.a1pesimulator.service.fileready;
+
+import static java.util.Objects.isNull;
+
+import java.time.ZonedDateTime;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.onap.a1pesimulator.data.fileready.EventMemoryHolder;
+import org.onap.a1pesimulator.data.fileready.FileData;
+import org.onap.a1pesimulator.data.ves.VesEvent;
+import org.onap.a1pesimulator.exception.VesBrokerException;
+import org.onap.a1pesimulator.service.ves.RanVesSender;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Service;
+import org.springframework.util.CollectionUtils;
+
+import reactor.core.publisher.Mono;
+
+/**
+ * Entry point for PM Bulk File event
+ */
+@Service
+public class RanFileReadyHolder {
+
+    private static final Logger log = LoggerFactory.getLogger(RanFileReadyHolder.class);
+
+    private List<EventMemoryHolder> collectedEvents;
+    private final RanVesSender ranVesSender;
+    private final FtpServerService ftpServerService;
+    private final PMBulkFileService xmlFileService;
+    private final FileReadyEventService fileReadyEventService;
+
+    public RanFileReadyHolder(RanVesSender ranVesSender, FtpServerService ftpServerService, PMBulkFileService xmlFileService,
+            FileReadyEventService fileReadyEventService) {
+        this.ranVesSender = ranVesSender;
+        this.ftpServerService = ftpServerService;
+        this.xmlFileService = xmlFileService;
+        this.fileReadyEventService = fileReadyEventService;
+    }
+
+    /**
+     * Run entire process: PM Bulk File creation-> upload to FTP -> delete temp PM Bulk File -> create File Ready Event - > send it to VES Collector
+     * collectedEvents are synchronized to not be updated by other threads during PM Bulk File creation
+     */
+    public void createPMBulkFileAndSendFileReadyMessage() {
+        synchronized (getCollectedEvents()) {
+            Mono.justOrEmpty(getCollectedEvents())
+                    .filter(this::areSomeEventsStored)
+                    .flatMap(xmlFileService::generatePMBulkFileXml)
+                    .map(ftpServerService::uploadFileToFtp)
+                    .flatMap(fileReadyEventService::createFileReadyEventAndDeleteTmpFile)
+                    .doOnNext(this::sendEventToVesCollector)
+                    .subscribe(fileData -> informAboutSuccess(), this::informAboutError);
+        }
+    }
+
+    /**
+     * Adds current event to the memory, which is List<EventMemoryHolder>
+     *
+     * @param vesEvent event from specific cell
+     * @throws VesBrokerException in case of any problem with adding to List, it throws an exception
+     */
+    public void saveEventToMemory(VesEvent vesEvent, String cellId, String jobId, Integer granPeriod) throws VesBrokerException {
+        try {
+            getCollectedEvents().add(new EventMemoryHolder(cellId, jobId, granPeriod, ZonedDateTime.now(), vesEvent));
+            log.trace("Saving VES event for cell {} with granularity period {} and sequence number {}", cellId, granPeriod, getCollectedEvents().size());
+        } catch (Exception e) {
+            String errorMsg = "Failed to save VES event to memory with exception:" + e;
+            throw new VesBrokerException(errorMsg);
+        }
+    }
+
+    /**
+     * Sends FileReadyEvent to VES Collector
+     *
+     * @param fileData object with FileReadyEvent file
+     */
+    private void sendEventToVesCollector(FileData fileData) {
+        ranVesSender.send(fileData.getFileReadyEvent());
+    }
+
+    /**
+     * Log about successful operation
+     */
+    private void informAboutSuccess() {
+        log.info("PM Bulk file was generated, uploaded to FTP and File ready event was send to VES Collector");
+    }
+
+    /**
+     * Log an error if occurs during the process
+     *
+     * @param throwable - error raised in some of the steps
+     */
+    private void informAboutError(Throwable throwable) {
+        log.info("File ready event was unsuccessful: {}", throwable.getMessage());
+    }
+
+    /**
+     * Check if there are any Events stored in the memory. Used before creating PM Bulk File xml
+     *
+     * @param collectedEvents list of stored events
+     * @return true there is at least one event / false - no event at all
+     */
+    private boolean areSomeEventsStored(List<EventMemoryHolder> collectedEvents) {
+        return !CollectionUtils.isEmpty(collectedEvents);
+    }
+
+    /**
+     * Factory to get List<EventMemoryHolder>
+     *
+     * @return existing or newly created List<EventMemoryHolder>
+     */
+    public List<EventMemoryHolder> getCollectedEvents() {
+        if (isNull(collectedEvents)) {
+            collectedEvents = Collections.synchronizedList(new ArrayList<>());
+        }
+        return collectedEvents;
+    }
+}