Add list of errors in responce for GET request.

Signed-off-by: Bartosz Gardziejewski <bartosz.gardziejewski@nokia.com>
Issue-ID: VNFSDK-594
Change-Id: I61fd4b5e514ca4185174027ff08d8908a968e404

2 files changed, 96 insertions, 2 deletions

diff --git a/vnfmarket-be/vnf-sdk-marketplace/src/main/java/org/onap/vtp/execution/VTPExecutionResource.java b/vnfmarket-be/vnf-sdk-marketplace/src/main/java/org/onap/vtp/execution/VTPExecutionResource.java
index 3bd522ff..2b06fe8f 100644
--- a/vnfmarket-be/vnf-sdk-marketplace/src/main/java/org/onap/vtp/execution/VTPExecutionResource.java
+++ b/vnfmarket-be/vnf-sdk-marketplace/src/main/java/org/onap/vtp/execution/VTPExecutionResource.java
@@ -1,5 +1,6 @@
 /**
  * Copyright 2018 Huawei Technologies Co., Ltd.
+ * Copyright 2020 Nokia.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -87,8 +88,9 @@ public class VTPExecutionResource  extends VTPResource{
     private static final String PRODUCT_ARG="--product";
     private static final String OPEN_CLI="open-cli";
     private static final String FORMAT="--format";
+    private static final Gson gson = new Gson();
 
-    private static Gson gson = new Gson();
+    protected static String pathToExecutions = "/opt/vtp/data/executions/";
 
     public VTPTestExecutionList executeHandler(VTPTestExecutionList executions, String requestId) throws VTPException {
         if (requestId == null) {
@@ -295,8 +297,13 @@ public class VTPExecutionResource  extends VTPResource{
                         if (n.get(END_TIME) != null)
                             exec.setEndTime(n.get(END_TIME).getAsString());
 
-                        if (n.get(EXECUTION_ID) != null)
+                        if (n.get(EXECUTION_ID) != null) {
                             exec.setExecutionId(n.get(EXECUTION_ID).getAsString());
+                            exec.setResults(
+                                new VTPExecutionResultsSupplier(pathToExecutions)
+                                    .getExecutionOutputsFromFile(exec.getExecutionId())
+                            );
+                        }
 
                         if (n.get(REQUEST_ID) != null)
                             exec.setRequestId(n.get(REQUEST_ID).getAsString());
@@ -316,6 +323,7 @@ public class VTPExecutionResource  extends VTPResource{
                         if (n.get(STATUS) != null)
                             exec.setStatus(n.get(STATUS).getAsString());
 
+
                         list.getExecutions().add(exec);
                     }
 
@@ -325,6 +333,7 @@ public class VTPExecutionResource  extends VTPResource{
         return list;
     }
 
+
     @Path("/executions")
     @GET
     @ApiOperation(tags = "VTP Execution", value = " List test executions", response = VTPTestExecution.class, responseContainer = "List")
diff --git a/vnfmarket-be/vnf-sdk-marketplace/src/main/java/org/onap/vtp/execution/VTPExecutionResultsSupplier.java b/vnfmarket-be/vnf-sdk-marketplace/src/main/java/org/onap/vtp/execution/VTPExecutionResultsSupplier.java
new file mode 100644
index 00000000..3f1e4c57
--- /dev/null
+++ b/vnfmarket-be/vnf-sdk-marketplace/src/main/java/org/onap/vtp/execution/VTPExecutionResultsSupplier.java
@@ -0,0 +1,85 @@
+/**
+ * Copyright 2020 Nokia.
+ *
+ * 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.vtp.execution;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.Optional;
+
+public class VTPExecutionResultsSupplier {
+
+    public static final Logger logger = LoggerFactory.getLogger(VTPExecutionResultsSupplier.class);
+
+    private static final String SUB_PATH_TO_EXECUTION_OUTPUT = "/output";
+    private static final Gson gson = new Gson();
+
+    protected String pathToExecutions;
+
+    VTPExecutionResultsSupplier(String pathToExecutions) {
+        this.pathToExecutions = pathToExecutions;
+    }
+
+    public JsonElement getExecutionOutputsFromFile(String executionId) {
+        File directoryWithExecutionFiles = new File(pathToExecutions);
+        return getExecutionFilesForGivenRequest(executionId, directoryWithExecutionFiles)
+            .map(this::getOutputOfLatestExecutionFile)
+            .orElse(createNoOutputFileErrorMessageInJsonFormat());
+    }
+
+    private Optional<File[]> getExecutionFilesForGivenRequest(String requestId, File directoryWithExecutionsData) {
+        return Optional.ofNullable(
+            directoryWithExecutionsData.listFiles((dir, name) -> name.startsWith(requestId))
+        );
+    }
+
+    private JsonElement getOutputOfLatestExecutionFile(File[] directoriesWithExecutionsData) {
+        return Arrays.stream(directoriesWithExecutionsData)
+            .max(Comparator.comparing(File::lastModified))
+            .map(file -> new File(file.getAbsolutePath() + SUB_PATH_TO_EXECUTION_OUTPUT))
+            .filter(File::exists)
+            .map(this::loadOutputJsonFromFile)
+            .orElse(createNoOutputFileErrorMessageInJsonFormat());
+    }
+
+    private JsonArray loadOutputJsonFromFile(File file) {
+        JsonArray outputJson;
+        try {
+            String executionResult = Files.readString(file.toPath());
+            outputJson = gson.fromJson(executionResult, JsonArray.class);
+        } catch (IOException | JsonParseException e) {
+            logger.error(e.getMessage(),e);
+            String errorMessage = "" +
+                "[{ \"error\": \"fail to load execution result\",\"reason\":\"" + e.getMessage() + "\"}]";
+            outputJson = gson.fromJson(errorMessage, JsonArray.class);
+        }
+        return outputJson;
+    }
+
+    private JsonArray createNoOutputFileErrorMessageInJsonFormat() {
+        return gson.fromJson("[{ \"error\": \"unable to find execution results\"}]", JsonArray.class);
+    }
+}