Adding logic to read response files from

filesystem for client integration tests

Issue-ID: CPS-1751
Change-Id: I62e24d09474184716c56149a06deae4500b7b286
Signed-off-by: waqas.ikram <waqas.ikram@est.tech>

3 files changed, 138 insertions, 22 deletions

diff --git a/cps-ncmp-rest-stub/cps-ncmp-rest-stub-service/src/main/java/org/onap/cps/ncmp/rest/stub/controller/NetworkCmProxyStubController.java b/cps-ncmp-rest-stub/cps-ncmp-rest-stub-service/src/main/java/org/onap/cps/ncmp/rest/stub/controller/NetworkCmProxyStubController.java
index ee035bf579..bf84b439f5 100644
--- a/cps-ncmp-rest-stub/cps-ncmp-rest-stub-service/src/main/java/org/onap/cps/ncmp/rest/stub/controller/NetworkCmProxyStubController.java
+++ b/cps-ncmp-rest-stub/cps-ncmp-rest-stub-service/src/main/java/org/onap/cps/ncmp/rest/stub/controller/NetworkCmProxyStubController.java
@@ -26,9 +26,11 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.UUID;
 import javax.validation.Valid;
 import javax.validation.constraints.NotNull;
@@ -42,21 +44,24 @@ import org.onap.cps.ncmp.rest.model.RestModuleReference;
 import org.onap.cps.ncmp.rest.model.RestOutputCmHandle;
 import org.onap.cps.ncmp.rest.model.RestOutputCmHandleCompositeState;
 import org.onap.cps.ncmp.rest.model.RestOutputCmHandlePublicProperties;
-import org.springframework.beans.factory.annotation.Value;
-import org.springframework.core.io.ClassPathResource;
+import org.onap.cps.ncmp.rest.stub.providers.ResourceProvider;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
-
 @Slf4j
 @RestController
 @RequestMapping("${rest.api.ncmp-stub-base-path}")
 public class NetworkCmProxyStubController implements NetworkCmProxyApi {
 
-    @Value("${stub.path}")
-    private String pathToResponseFiles;
+    @Autowired
+    private ResourceProvider resourceProvider;
+
+    @Autowired
+    private ObjectMapper objectMapper;
+
     private static final String ASYNC_REQUEST_ID = "requestId";
 
     @Override
@@ -70,16 +75,18 @@ public class NetworkCmProxyStubController implements NetworkCmProxyApi {
             final Map<String, Object> asyncResponseData = asyncResponse.getBody();
             Object responseObject = null;
             // read JSON file and map/convert to java POJO
-            final ClassPathResource resource = new ClassPathResource(
-                    pathToResponseFiles + "passthrough-operational-example.json");
-            try (InputStream inputStream = resource.getInputStream()) {
-                final String string = new String(inputStream.readAllBytes(), StandardCharsets.UTF_8);
-                final ObjectMapper mapper = new ObjectMapper();
-                responseObject = mapper.readValue(string, Object.class);
-            } catch (final IOException exception) {
-                log.error("Error reading the file.", exception);
+            try {
+                final Optional<Object> optionalResponseObject = getResponseObject(
+                        "passthrough-operational-example.json", Object.class);
+                if (optionalResponseObject.isPresent()) {
+                    responseObject = optionalResponseObject.get();
+                }
+
+            } catch (final IOException ioException) {
+                log.error("Error reading the file.", ioException);
                 return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).build();
             }
+
             if (asyncResponseData == null) {
                 return ResponseEntity.ok(responseObject);
             }
@@ -91,18 +98,20 @@ public class NetworkCmProxyStubController implements NetworkCmProxyApi {
     @Override
     public ResponseEntity<List<RestOutputCmHandle>> searchCmHandles(
             final CmHandleQueryParameters cmHandleQueryParameters) {
-        List<RestOutputCmHandle> restOutputCmHandles = null;
         // read JSON file and map/convert to java POJO
-        final ClassPathResource resource = new ClassPathResource(pathToResponseFiles + "cmHandlesSearch.json");
-        try (InputStream inputStream = resource.getInputStream()) {
-            final String string = new String(inputStream.readAllBytes(), StandardCharsets.UTF_8);
-            final ObjectMapper mapper = new ObjectMapper();
-            restOutputCmHandles = Arrays.asList(mapper.readValue(string, RestOutputCmHandle[].class));
-        } catch (final IOException exception) {
-            log.error("Error reading the file.", exception);
+        try {
+            final Optional<RestOutputCmHandle[]> optionalResponseObject = getResponseObject("cmHandlesSearch.json",
+                    RestOutputCmHandle[].class);
+            if (optionalResponseObject.isPresent()) {
+                final List<RestOutputCmHandle> restOutputCmHandles = Arrays.asList(optionalResponseObject.get());
+                return ResponseEntity.ok(restOutputCmHandles);
+            }
+        } catch (final IOException ioException) {
+            log.error("Error reading the file.", ioException);
             return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).build();
         }
-        return ResponseEntity.ok(restOutputCmHandles);
+
+        return ResponseEntity.ok(Collections.<RestOutputCmHandle>emptyList());
     }
 
     private ResponseEntity<Map<String, Object>> populateAsyncResponse(final String topicParamInQuery) {
@@ -122,6 +131,15 @@ public class NetworkCmProxyStubController implements NetworkCmProxyApi {
         return asyncResponseData;
     }
 
+    private <T> Optional<T> getResponseObject(final String filename, final Class<T> type) throws IOException {
+        final Optional<InputStream> optionalInputStream = resourceProvider.getResourceInputStream(filename);
+        if (optionalInputStream.isPresent()) {
+            final String content = new String(optionalInputStream.get().readAllBytes(), StandardCharsets.UTF_8);
+            return Optional.of(objectMapper.readValue(content, type));
+        }
+        return Optional.empty();
+    }
+
     @Override
     public ResponseEntity<Void> createResourceDataRunningForCmHandle(@NotNull @Valid final String resourceIdentifier,
                                                                      final String datastoreName, final String cmHandle,
diff --git a/cps-ncmp-rest-stub/cps-ncmp-rest-stub-service/src/main/java/org/onap/cps/ncmp/rest/stub/providers/ResourceProvider.java b/cps-ncmp-rest-stub/cps-ncmp-rest-stub-service/src/main/java/org/onap/cps/ncmp/rest/stub/providers/ResourceProvider.java
new file mode 100644
index 0000000000..9b15ab6b87
--- /dev/null
+++ b/cps-ncmp-rest-stub/cps-ncmp-rest-stub-service/src/main/java/org/onap/cps/ncmp/rest/stub/providers/ResourceProvider.java
@@ -0,0 +1,31 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2023 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ncmp.rest.stub.providers;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Optional;
+
+public interface ResourceProvider {
+
+    Optional<InputStream> getResourceInputStream(final String filename) throws IOException;
+
+}
diff --git a/cps-ncmp-rest-stub/cps-ncmp-rest-stub-service/src/main/java/org/onap/cps/ncmp/rest/stub/providers/ResourceProviderImpl.java b/cps-ncmp-rest-stub/cps-ncmp-rest-stub-service/src/main/java/org/onap/cps/ncmp/rest/stub/providers/ResourceProviderImpl.java
new file mode 100644
index 0000000000..c0779eb270
--- /dev/null
+++ b/cps-ncmp-rest-stub/cps-ncmp-rest-stub-service/src/main/java/org/onap/cps/ncmp/rest/stub/providers/ResourceProviderImpl.java
@@ -0,0 +1,67 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2023 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ncmp.rest.stub.providers;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Optional;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.stereotype.Service;
+
+@Slf4j
+@Service
+public class ResourceProviderImpl implements ResourceProvider {
+
+    private String pathToResponseFiles;
+
+    @Autowired
+    public ResourceProviderImpl(@Value("${stub.path}") final String pathToResponseFiles) {
+        this.pathToResponseFiles = pathToResponseFiles;
+    }
+
+    @Override
+    public Optional<InputStream> getResourceInputStream(final String filename) throws IOException {
+        final Path path = Paths.get(pathToResponseFiles).resolve(filename);
+
+        if (Files.exists(path)) {
+            log.info("Found resource file on file system using path: {}", path);
+            return Optional.of(Files.newInputStream(path));
+        }
+
+        log.warn("Couldn't find file on file system '{}', will search it in classpath", path);
+
+        final ClassPathResource resource = new ClassPathResource(path.toString());
+        if (resource.exists()) {
+            log.info("Found resource in classpath using path: {}", path);
+            return Optional.of(resource.getInputStream());
+        }
+
+        log.error("{} file not found on classpath or on file system", path);
+        return Optional.empty();
+    }
+
+}