Fixed some sonar issues

Changed some Flux to Mono.

Removed some obfuscating wrappers.

Issue-ID: DCAEGEN2-1118
Change-Id: I76dcaea7c69608cf404389fad93f7539f735aad2
Signed-off-by: PatrikBuhr <patrik.buhr@est.tech>

5 files changed, 50 insertions, 46 deletions

diff --git a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/service/JsonMessageParser.java b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/service/JsonMessageParser.java
index 3c606deb..a8f79ea1 100644
--- a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/service/JsonMessageParser.java
+++ b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/service/JsonMessageParser.java
@@ -123,12 +123,11 @@ public class JsonMessageParser {
     }
 
     private Flux<FileReadyMessage> createMessages(Flux<JsonObject> jsonObject) {
-        return jsonObject.flatMap(monoJsonP -> !containsNotificationFields(monoJsonP)
-                ? logErrorAndReturnEmptyMessageFlux("Incorrect JsonObject - missing header. " + jsonObject)
-                : transformMessages(monoJsonP));
+        return jsonObject.flatMap(monoJsonP -> containsNotificationFields(monoJsonP) ? transformMessages(monoJsonP)
+                : logErrorAndReturnEmptyMessageFlux("Incorrect JsonObject - missing header. " + jsonObject));
     }
 
-    private Flux<FileReadyMessage> transformMessages(JsonObject message) {
+    private Mono<FileReadyMessage> transformMessages(JsonObject message) {
         Optional<MessageMetaData> optionalMessageMetaData = getMessageMetaData(message);
         if (optionalMessageMetaData.isPresent()) {
             JsonObject notificationFields = message.getAsJsonObject(EVENT).getAsJsonObject(NOTIFICATION_FIELDS);
@@ -138,22 +137,22 @@ public class JsonMessageParser {
                 if (!allFileDataFromJson.isEmpty()) {
                     MessageMetaData messageMetaData = optionalMessageMetaData.get();
                     // @formatter:off
-                    return Flux.just(ImmutableFileReadyMessage.builder()
+                    return Mono.just(ImmutableFileReadyMessage.builder()
                             .pnfName(messageMetaData.sourceName())
                             .messageMetaData(messageMetaData)
                             .files(allFileDataFromJson)
                             .build());
                     // @formatter:on
                 } else {
-                    return Flux.empty();
+                    return Mono.empty();
                 }
             }
 
             logger.error("Unable to collect file from xNF. Missing arrayOfNamedHashMap in message. {}", message);
-            return Flux.empty();
+            return Mono.empty();
         }
         logger.error("Unable to collect file from xNF. FileReady event has incorrect JsonObject. {}", message);
-        return Flux.empty();
+        return Mono.empty();
     }
 
     private Optional<MessageMetaData> getMessageMetaData(JsonObject message) {
diff --git a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/DataRouterPublisher.java b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/DataRouterPublisher.java
index 338c8323..4c0dcce5 100644
--- a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/DataRouterPublisher.java
+++ b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/DataRouterPublisher.java
@@ -27,7 +27,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.http.HttpStatus;
 
-import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
 
 /**
  * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/13/18
@@ -50,27 +50,27 @@ public class DataRouterPublisher {
      * @param firstBackoffTimeout the time to delay the first retry
      * @return the HTTP response status as a string
      */
-    public Flux<ConsumerDmaapModel> execute(ConsumerDmaapModel model, long numRetries, Duration firstBackoff) {
+    public Mono<ConsumerDmaapModel> execute(ConsumerDmaapModel model, long numRetries, Duration firstBackoff) {
         logger.trace("Method called with arg {}", model);
         DmaapProducerReactiveHttpClient dmaapProducerReactiveHttpClient = resolveClient();
 
         //@formatter:off
-        return Flux.just(model)
-                .cache(1)
+        return Mono.just(model)
+                .cache()
                 .flatMap(dmaapProducerReactiveHttpClient::getDmaapProducerResponse)
                 .flatMap(httpStatus -> handleHttpResponse(httpStatus, model))
                 .retryBackoff(numRetries, firstBackoff);
         //@formatter:on
     }
 
-    private Flux<ConsumerDmaapModel> handleHttpResponse(HttpStatus response, ConsumerDmaapModel model) {
+    private Mono<ConsumerDmaapModel> handleHttpResponse(HttpStatus response, ConsumerDmaapModel model) {
 
         if (HttpUtils.isSuccessfulResponseCode(response.value())) {
             logger.trace("Publish to DR successful!");
-            return Flux.just(model);
+            return Mono.just(model);
         } else {
-            logger.warn("Publish to DR unsuccessful, response code: " + response);
-            return Flux.error(new Exception("Publish to DR unsuccessful, response code: " + response));
+            logger.warn("Publish to DR unsuccessful, response code: {}", response);
+            return Mono.error(new Exception("Publish to DR unsuccessful, response code: " + response));
         }
     }
 
diff --git a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/ScheduledTasks.java b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/ScheduledTasks.java
index f22c7bf9..37b7a559 100644
--- a/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/ScheduledTasks.java
+++ b/datafile-app-server/src/main/java/org/onap/dcaegen2/collectors/datafile/tasks/ScheduledTasks.java
@@ -98,7 +98,7 @@ public class ScheduledTasks {
             .doOnNext(fileData -> taskCounter.incrementAndGet())
             .flatMap(this::collectFileFromXnf)
             .flatMap(this::publishToDataRouter)
-            .flatMap(model -> deleteFile(Paths.get(model.getInternalLocation())))
+            .doOnNext(model -> deleteFile(Paths.get(model.getInternalLocation())))
             .doOnNext(model -> taskCounter.decrementAndGet())
             .sequential()
             .subscribe(this::onSuccess, this::onError, this::onComplete);
@@ -109,8 +109,8 @@ public class ScheduledTasks {
         logger.info("Datafile tasks have been completed");
     }
 
-    private void onSuccess(Path localFile) {
-        logger.info("Datafile consumed tasks." + localFile);
+    private void onSuccess(ConsumerDmaapModel model) {
+        logger.info("Datafile consumed tasks {}", model.getInternalLocation());
     }
 
     private void onError(Throwable throwable) {
@@ -138,18 +138,19 @@ public class ScheduledTasks {
 
         return fileCollect.collectorTask
                 .execute(fileCollect.fileData, fileCollect.metaData, maxNUmberOfRetries, initialRetryTimeout)
-                .onErrorResume(exception -> handleCollectFailure(fileCollect.fileData, exception));
+                .onErrorResume(exception -> handleCollectFailure(fileCollect.fileData));
     }
 
-    private Mono<ConsumerDmaapModel> handleCollectFailure(FileData fileData, Throwable exception) {
-        logger.error("File fetching failed: {}, reason: {}", fileData.name(), exception.getMessage());
-        deleteFile(fileData.getLocalFileName());
-        alreadyPublishedFiles.remove(fileData.getLocalFileName());
+    private Mono<ConsumerDmaapModel> handleCollectFailure(FileData fileData) {
+        Path localFileName = fileData.getLocalFileName();
+        logger.error("File fetching failed: {}", localFileName);
+        deleteFile(localFileName);
+        alreadyPublishedFiles.remove(localFileName);
         taskCounter.decrementAndGet();
         return Mono.empty();
     }
 
-    private Flux<ConsumerDmaapModel> publishToDataRouter(ConsumerDmaapModel model) {
+    private Mono<ConsumerDmaapModel> publishToDataRouter(ConsumerDmaapModel model) {
         final long maxNumberOfRetries = 3;
         final Duration initialRetryTimeout = Duration.ofSeconds(5);
 
@@ -160,13 +161,13 @@ public class ScheduledTasks {
 
     }
 
-    private Flux<ConsumerDmaapModel> handlePublishFailure(ConsumerDmaapModel model, Throwable exception) {
+    private Mono<ConsumerDmaapModel> handlePublishFailure(ConsumerDmaapModel model, Throwable exception) {
         logger.error("File publishing failed: {}, exception: {}", model.getName(), exception);
         Path internalFileName = Paths.get(model.getInternalLocation());
         deleteFile(internalFileName);
         alreadyPublishedFiles.remove(internalFileName);
         taskCounter.decrementAndGet();
-        return Flux.empty();
+        return Mono.empty();
     }
 
     private Flux<FileReadyMessage> consumeMessagesFromDmaap() {
@@ -179,7 +180,7 @@ public class ScheduledTasks {
         final DMaaPMessageConsumerTask messageConsumerTask =
                 new DMaaPMessageConsumerTask(this.applicationConfiguration);
         return messageConsumerTask.execute()
-                .onErrorResume(exception -> handleConsumeMessageFailure(exception));
+                .onErrorResume(this::handleConsumeMessageFailure);
     }
 
     private Flux<FileReadyMessage> handleConsumeMessageFailure(Throwable exception) {
@@ -187,13 +188,12 @@ public class ScheduledTasks {
         return Flux.empty();
     }
 
-    private Flux<Path> deleteFile(Path localFile) {
+    private void deleteFile(Path localFile) {
         logger.trace("Deleting file: {}", localFile);
         try {
             Files.delete(localFile);
         } catch (Exception e) {
             logger.warn("Could not delete file: {}, {}", localFile, e);
         }
-        return Flux.just(localFile);
     }
 }
diff --git a/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/tasks/DataRouterPublisherTest.java b/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/tasks/DataRouterPublisherTest.java
index 73511d19..d2240f18 100644
--- a/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/tasks/DataRouterPublisherTest.java
+++ b/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/tasks/DataRouterPublisherTest.java
@@ -37,7 +37,7 @@ import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.config.DmaapPub
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.config.ImmutableDmaapPublisherConfiguration;
 import org.springframework.http.HttpStatus;
 
-import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
 import reactor.test.StepVerifier;
 
 /**
@@ -96,7 +96,7 @@ class DataRouterPublisherTest {
 
     @Test
     public void whenPassedObjectFits_ReturnsCorrectStatus() {
-        prepareMocksForTests(Flux.just(HttpStatus.OK));
+        prepareMocksForTests(Mono.just(HttpStatus.OK));
 
         StepVerifier.create(dmaapPublisherTask.execute(consumerDmaapModel, 1, Duration.ofSeconds(0)))
                 .expectNext(consumerDmaapModel).verifyComplete();
@@ -107,7 +107,7 @@ class DataRouterPublisherTest {
 
     @Test
     public void whenPassedObjectFits_firstFailsThenSucceeds() {
-        prepareMocksForTests(Flux.just(HttpStatus.BAD_GATEWAY), Flux.just(HttpStatus.OK));
+        prepareMocksForTests(Mono.just(HttpStatus.BAD_GATEWAY), Mono.just(HttpStatus.OK));
 
         StepVerifier.create(dmaapPublisherTask.execute(consumerDmaapModel, 1, Duration.ofSeconds(0)))
                 .expectNext(consumerDmaapModel).verifyComplete();
@@ -118,7 +118,7 @@ class DataRouterPublisherTest {
 
     @Test
     public void whenPassedObjectFits_firstFailsThenFails() {
-        prepareMocksForTests(Flux.just(HttpStatus.BAD_GATEWAY), Flux.just(HttpStatus.BAD_GATEWAY));
+        prepareMocksForTests(Mono.just(HttpStatus.BAD_GATEWAY), Mono.just(HttpStatus.BAD_GATEWAY));
 
         StepVerifier.create(dmaapPublisherTask.execute(consumerDmaapModel, 1, Duration.ofSeconds(0)))
                 .expectErrorMessage("Retries exhausted: 1/1").verify();
@@ -128,7 +128,7 @@ class DataRouterPublisherTest {
     }
 
     @SafeVarargs
-    final void prepareMocksForTests(Flux<HttpStatus> firstResponse, Flux<HttpStatus>... nextHttpResponses) {
+    final void prepareMocksForTests(Mono<HttpStatus> firstResponse, Mono<HttpStatus>... nextHttpResponses) {
         dMaaPProducerReactiveHttpClient = mock(DmaapProducerReactiveHttpClient.class);
         when(dMaaPProducerReactiveHttpClient.getDmaapProducerResponse(any())).thenReturn(firstResponse,
                 nextHttpResponses);
diff --git a/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/tasks/XnfCollectorTaskImplTest.java b/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/tasks/XnfCollectorTaskImplTest.java
index 10c5b167..804b46e9 100644
--- a/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/tasks/XnfCollectorTaskImplTest.java
+++ b/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/tasks/XnfCollectorTaskImplTest.java
@@ -67,7 +67,12 @@ public class XnfCollectorTaskImplTest {
     private static final String PWD = "pwd";
     private static final String FTPES_LOCATION =
             FTPES_SCHEME + USER + ":" + PWD + "@" + SERVER_ADDRESS + ":" + PORT_22 + REMOTE_FILE_LOCATION;
+
+    private static final String FTPES_LOCATION_NO_PORT =
+            FTPES_SCHEME + USER + ":" + PWD + "@" + SERVER_ADDRESS + REMOTE_FILE_LOCATION;
     private static final String SFTP_LOCATION = SFTP_SCHEME + SERVER_ADDRESS + ":" + PORT_22 + REMOTE_FILE_LOCATION;
+    private static final String SFTP_LOCATION_NO_PORT = SFTP_SCHEME + SERVER_ADDRESS +  REMOTE_FILE_LOCATION;
+
     private static final String GZIP_COMPRESSION = "gzip";
     private static final String MEAS_COLLECT_FILE_FORMAT_TYPE = "org.3GPP.32.435#measCollec";
     private static final String FILE_FORMAT_VERSION = "V10";
@@ -100,11 +105,11 @@ public class XnfCollectorTaskImplTest {
         // @formatter:on
     }
 
-    private FileData createFileData() {
+    private FileData createFileData(String location) {
         // @formatter:off
         return  ImmutableFileData.builder()
             .name(PM_FILE_NAME)
-            .location(FTPES_LOCATION)
+            .location(location)
             .compression(GZIP_COMPRESSION)
             .fileFormatType(MEAS_COLLECT_FILE_FORMAT_TYPE)
             .fileFormatVersion(FILE_FORMAT_VERSION)
@@ -113,7 +118,7 @@ public class XnfCollectorTaskImplTest {
         // @formatter:on
     }
 
-    private ConsumerDmaapModel createExpectedConsumerDmaapModel() {
+    private ConsumerDmaapModel createExpectedConsumerDmaapModel(String location) {
         // @formatter:off
         return ImmutableConsumerDmaapModel.builder()
             .productName(PRODUCT_NAME)
@@ -123,7 +128,7 @@ public class XnfCollectorTaskImplTest {
             .startEpochMicrosec(START_EPOCH_MICROSEC)
             .timeZoneOffset(TIME_ZONE_OFFSET)
             .name(PM_FILE_NAME)
-            .location(FTPES_LOCATION)
+            .location(location)
             .internalLocation(LOCAL_FILE_LOCATION.toString())
             .compression(GZIP_COMPRESSION)
             .fileFormatType(MEAS_COLLECT_FILE_FORMAT_TYPE)
@@ -146,9 +151,9 @@ public class XnfCollectorTaskImplTest {
         FileCollector collectorUndetTest =
                 new FileCollector(appConfigMock, ftpsClientMock, sftpClientMock);
 
-        FileData fileData = createFileData();
+        FileData fileData = createFileData(FTPES_LOCATION_NO_PORT);
 
-        ConsumerDmaapModel expectedConsumerDmaapModel = createExpectedConsumerDmaapModel();
+        ConsumerDmaapModel expectedConsumerDmaapModel = createExpectedConsumerDmaapModel(FTPES_LOCATION_NO_PORT);
 
         StepVerifier.create(collectorUndetTest.execute(fileData, createMessageMetaData(), 3, Duration.ofSeconds(0)))
                 .expectNext(expectedConsumerDmaapModel).verifyComplete();
@@ -168,7 +173,7 @@ public class XnfCollectorTaskImplTest {
         // @formatter:off
         FileData fileData = ImmutableFileData.builder()
                 .name(PM_FILE_NAME)
-                .location(SFTP_LOCATION)
+                .location(SFTP_LOCATION_NO_PORT)
                 .compression(GZIP_COMPRESSION)
                 .fileFormatType(MEAS_COLLECT_FILE_FORMAT_TYPE)
                 .fileFormatVersion(FILE_FORMAT_VERSION)
@@ -183,7 +188,7 @@ public class XnfCollectorTaskImplTest {
                 .startEpochMicrosec(START_EPOCH_MICROSEC)
                 .timeZoneOffset(TIME_ZONE_OFFSET)
                 .name(PM_FILE_NAME)
-                .location(SFTP_LOCATION)
+                .location(SFTP_LOCATION_NO_PORT)
                 .internalLocation(LOCAL_FILE_LOCATION.toString())
                 .compression(GZIP_COMPRESSION)
                 .fileFormatType(MEAS_COLLECT_FILE_FORMAT_TYPE)
@@ -202,7 +207,7 @@ public class XnfCollectorTaskImplTest {
     public void whenFtpesFileAlwaysFail_retryAndFail() throws Exception {
         FileCollector collectorUndetTest =
                 new FileCollector(appConfigMock, ftpsClientMock, sftpClientMock);
-        FileData fileData = createFileData();
+        FileData fileData = createFileData(FTPES_LOCATION);
         doThrow(new DatafileTaskException("Unable to collect file.")).when(ftpsClientMock)
                 .collectFile(REMOTE_FILE_LOCATION, LOCAL_FILE_LOCATION);
 
@@ -219,9 +224,9 @@ public class XnfCollectorTaskImplTest {
         doThrow(new DatafileTaskException("Unable to collect file.")).doNothing().when(ftpsClientMock)
                 .collectFile(REMOTE_FILE_LOCATION, LOCAL_FILE_LOCATION);
 
-        ConsumerDmaapModel expectedConsumerDmaapModel = createExpectedConsumerDmaapModel();
+        ConsumerDmaapModel expectedConsumerDmaapModel = createExpectedConsumerDmaapModel(FTPES_LOCATION_NO_PORT);
 
-        FileData fileData = createFileData();
+        FileData fileData = createFileData(FTPES_LOCATION_NO_PORT);
         StepVerifier.create(collectorUndetTest.execute(fileData, createMessageMetaData(), 3, Duration.ofSeconds(0)))
                 .expectNext(expectedConsumerDmaapModel).verifyComplete();