Split sequence generation to classess

* Delegate original logic to separate clasess
* Introduce InputParamsCollector
* Introduce CapabilitiesDataExtractor
* Add coverage for changes

Change-Id: Ibb35dfb67306f789950c3b77362c5d79a3b6da63
Issue-ID: APPC-440
Signed-off-by: kurczews <krzysztof.kurczewski@nokia.com>

9 files changed, 540 insertions, 228 deletions

diff --git a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/CapabilitiesDataExtractor.java b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/CapabilitiesDataExtractor.java
new file mode 100644
index 000000000..b740e4feb
--- /dev/null
+++ b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/CapabilitiesDataExtractor.java
@@ -0,0 +1,95 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2018 Nokia. 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.appc.flow.controller.node;
+
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VF_MODULE;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VM;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNF;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNFC;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import org.onap.appc.flow.controller.dbervices.FlowControlDBService;
+import org.onap.appc.flow.controller.interfaceData.Capabilities;
+import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
+import org.onap.ccsdk.sli.core.sli.SvcLogicException;
+
+public class CapabilitiesDataExtractor {
+
+  private static final EELFLogger log = EELFManager.getInstance().getLogger(CapabilitiesDataExtractor.class);
+
+  private final FlowControlDBService dbService;
+  private final ObjectMapper mapper;
+
+  public CapabilitiesDataExtractor() {
+    this(FlowControlDBService.initialise());
+  }
+
+  /**
+   * Ctor for tests, prefer to use default one
+   */
+  public CapabilitiesDataExtractor(FlowControlDBService dbService) {
+    this.dbService = dbService;
+
+    mapper = new ObjectMapper();
+    mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+    mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
+  }
+
+  Capabilities getCapabilitiesData(SvcLogicContext ctx) throws SvcLogicException, IOException {
+
+    String fn = "FlowExecutorNode.getCapabilitiesData";
+    String capabilitiesData = dbService.getCapabilitiesData(ctx);
+    log.info(fn + "capabilitiesDataInput:" + capabilitiesData);
+
+    Capabilities capabilities = new Capabilities();
+    if (capabilitiesData == null) {
+      return capabilities;
+    }
+
+    JsonNode capabilitiesNode = mapper.readTree(capabilitiesData);
+    log.info("capabilitiesNode:" + capabilitiesNode.toString());
+
+    capabilities.getVfModule().addAll(extractParameterList(capabilitiesNode, VF_MODULE));
+    capabilities.getVnfc().addAll(extractParameterList(capabilitiesNode, VNFC));
+    capabilities.getVnf().addAll(extractParameterList(capabilitiesNode, VNF));
+    capabilities.getVm().addAll(extractParameterList(capabilitiesNode, VM));
+
+    log.info("Capabilities Output:" + capabilities.toString());
+
+    return capabilities;
+  }
+
+  private <T> List<T> extractParameterList(JsonNode root, String parameter) throws IOException {
+    JsonNode parameterNode = root.get(parameter);
+    if (parameterNode == null) {
+      return new ArrayList<>();
+    }
+    return mapper.readValue(parameterNode.toString(), new TypeReference<List<T>>() {});
+  }
+
+}
\ No newline at end of file
diff --git a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/EnvVariables.java b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/EnvVariables.java
index 6cc3b7550..bac1f6cb0 100644
--- a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/EnvVariables.java
+++ b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/EnvVariables.java
@@ -1,9 +1,30 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2018 Nokia. 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.appc.flow.controller.node;
 
 import java.util.function.Function;
 
 /**
- * Wrapper for accessing environment variables
+ * Wrapper which allows to mock static calls of System.getenv()
+ *
+ * @see System#getenv()
  */
 class EnvVariables {
 
@@ -13,13 +34,6 @@ class EnvVariables {
     envSupplier = System::getenv;
   }
 
-  /**
-   * Allows to override environment variables in tests, prefer to use default constructor
-   */
-  EnvVariables(Function<String, String> envSupplier) {
-    this.envSupplier = envSupplier;
-  }
-
   String getenv(String variable) {
     return envSupplier.apply(variable);
   }
diff --git a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/FlowControlNode.java b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/FlowControlNode.java
index 28130e777..fd883601f 100644
--- a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/FlowControlNode.java
+++ b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/FlowControlNode.java
@@ -97,19 +97,18 @@ import org.onap.ccsdk.sli.core.sli.SvcLogicJavaPlugin;
 public class FlowControlNode implements SvcLogicJavaPlugin {
 
   private static final EELFLogger log = EELFManager.getInstance().getLogger(FlowControlNode.class);
-  private static final String SDNC_CONFIG_DIR_VAR = "SDNC_CONFIG_DIR";
 
-  private final EnvVariables envVariables;
   private final FlowControlDBService dbService;
+  private final FlowSequenceGenerator flowSequenceGenerator;
 
   public FlowControlNode() {
-    this.envVariables = new EnvVariables();
     this.dbService = FlowControlDBService.initialise();
+    this.flowSequenceGenerator = new FlowSequenceGenerator();
   }
 
-  FlowControlNode(EnvVariables envVariables, FlowControlDBService dbService) {
-    this.envVariables = envVariables;
+  FlowControlNode(FlowControlDBService dbService, FlowSequenceGenerator flowSequenceGenerator) {
     this.dbService = dbService;
+    this.flowSequenceGenerator = flowSequenceGenerator;
   }
 
   public void processFlow(Map<String, String> inParams, SvcLogicContext ctx)
@@ -154,7 +153,7 @@ public class FlowControlNode implements SvcLogicJavaPlugin {
         .getAttributeKeySet()
         .forEach(key -> log.debug(key + "=" + ctx.getAttribute(key)));
 
-    String flowSequence = getFlowSequence(inParams, ctx, localContext);
+    String flowSequence = flowSequenceGenerator.getFlowSequence(inParams, ctx, localContext);
 
     log.debug("Received Flow Sequence : " + flowSequence);
     HashMap<Integer, Transaction> transactionMap = createTransactionMap(flowSequence, localContext);
@@ -162,81 +161,6 @@ public class FlowControlNode implements SvcLogicJavaPlugin {
     log.info("Executed all the transaction successfully");
   }
 
-  String getFlowSequence(Map<String, String> inParams, SvcLogicContext ctx, SvcLogicContext localContext) throws Exception {
-    String flowSequence = null;
-    if (localContext.getAttribute(SEQUENCE_TYPE) != null) {
-      if (localContext.getAttribute(GENERATION_NODE) != null) {
-        GraphExecutor transactionExecutor = new GraphExecutor();
-        Boolean generatorExists = transactionExecutor.hasGraph(
-            "APPC_COMMOM",
-            localContext.getAttribute(GENERATION_NODE),
-            null,
-            "sync"
-        );
-
-        if (generatorExists) {
-          flowSequence = transactionExecutor.executeGraph(
-              "APPC_COMMOM",
-              localContext.getAttribute(GENERATION_NODE),
-              null, "sync", null)
-              .getProperty(FLOW_SEQUENCE);
-        } else {
-          throw new Exception("Can not find Custom defined Flow Generator for "
-              + localContext.getAttribute(GENERATION_NODE));
-        }
-
-      } else if ((localContext.getAttribute(SEQUENCE_TYPE)).equalsIgnoreCase(DESINGTIME)) {
-
-        localContext.setAttribute(VNFC_TYPE, ctx.getAttribute(VNFC_TYPE));
-        flowSequence = dbService.getDesignTimeFlowModel(localContext);
-
-        if (flowSequence == null) {
-          throw new Exception("Flow Sequence is not found User Designed VNF " + ctx.getAttribute(VNF_TYPE));
-        }
-
-      } else if ((localContext.getAttribute(SEQUENCE_TYPE)).equalsIgnoreCase(RUNTIME)) {
-
-        Transaction transaction = new Transaction();
-        String input = collectInputParams(ctx, transaction);
-        log.info("CollectInputParamsData-Input: " + input);
-
-        RestExecutor restExe = new RestExecutor();
-        Map<String, String> flowSeq = restExe.execute(transaction, localContext);
-
-        JSONObject sequence = new JSONObject(flowSeq.get("restResponse"));
-        if (sequence.has("output")) {
-          flowSequence = sequence.getJSONObject("output").toString();
-        }
-        log.info("MultistepSequenceGenerator-Output: " + flowSequence);
-
-        if (flowSequence == null) {
-          throw new Exception("Failed to get the Flow Sequece runtime for VNF type"
-              + ctx.getAttribute(VNF_TYPE));
-        }
-
-      } else if ((localContext.getAttribute(SEQUENCE_TYPE)).equalsIgnoreCase(EXTERNAL)) {
-        //String input = collectInputParams(localContext);
-        //    flowSequnce = ""; //get it from the External interface calling the Rest End point - TBD
-        //if(flowSequnce == null)
-
-        throw new Exception("Flow Sequence not found for " + ctx.getAttribute(VNF_TYPE));
-
-      } else {
-        //No other type of model supported...
-        //in Future can get flowModel from other generators which will be included here
-        throw new Exception("No information found for sequence Owner Design-Time Vs Run-Time");
-      }
-
-    } else {
-      FlowGenerator flowGenerator = new FlowGenerator();
-      Transactions trans = flowGenerator.createSingleStepModel(inParams, ctx);
-      ObjectMapper mapper = new ObjectMapper();
-      flowSequence = mapper.writeValueAsString(trans);
-      log.debug("Single step Flow Sequence : " + flowSequence);
-    }
-    return flowSequence;
-  }
-
   private void executeAllTransaction(HashMap<Integer, Transaction> transactionMap, SvcLogicContext ctx)
       throws Exception {
 
@@ -380,143 +304,4 @@ public class FlowControlNode implements SvcLogicJavaPlugin {
     //get a field in transction class as transactionhandle interface and register the Handler here for each trnactions
   }
 
-  private String collectInputParams(SvcLogicContext ctx, Transaction transaction) throws Exception {
-
-    String fn = "FlowExecuteNode.collectInputParams";
-    Properties prop = loadProperties();
-    log.info("Loaded Properties " + prop.toString());
-
-    String vnfId = ctx.getAttribute(VNF_ID);
-    String inputData = null;
-    log.debug(fn + "vnfId :" + vnfId);
-
-    if (StringUtils.isBlank(vnfId)) {
-      throw new Exception("VnfId is missing");
-    }
-
-    try {
-      ActionIdentifier actionIdentifier = new ActionIdentifier();
-      log.debug("Enter ActionIdentifier");
-      if (StringUtils.isNotBlank(vnfId)) {
-        actionIdentifier.setVnfId(vnfId);
-      }
-      if (StringUtils.isNotBlank(ctx.getAttribute(VSERVER_ID))) {
-        actionIdentifier.setVserverId(ctx.getAttribute(VSERVER_ID));
-      }
-      if (StringUtils.isNotBlank(ctx.getAttribute(VNFC_NAME))) {
-        actionIdentifier.setVnfcName(ctx.getAttribute(VNFC_NAME));
-      }
-      log.info("ActionIdentifierData" + actionIdentifier.toString());
-
-      RequestInfo requestInfo = new RequestInfo();
-      log.info("Enter RequestInfo");
-      requestInfo.setAction(ctx.getAttribute(REQUEST_ACTION));
-      requestInfo.setActionLevel(ctx.getAttribute(ACTION_LEVEL));
-      requestInfo.setPayload(ctx.getAttribute(PAYLOAD));
-      requestInfo.setActionIdentifier(actionIdentifier);
-      log.debug("RequestInfo: " + requestInfo.toString());
-
-      InventoryInfo inventoryInfo = new InventoryInfoExtractor().getInventoryInfo(ctx, vnfId);
-      DependencyInfo dependencyInfo = getDependencyInfo(ctx);
-      Capabilities capabilities = getCapabilitiesData(ctx);
-
-      Input input = new Input();
-      log.info("Enter InputData");
-      input.setRequestInfo(requestInfo);
-      input.setInventoryInfo(inventoryInfo);
-      input.setDependencyInfo(dependencyInfo);
-      input.setCapabilities(capabilities);
-      log.info(fn + "Input parameters:" + input.toString());
-
-      ObjectMapper mapper = new ObjectMapper();
-      mapper.setSerializationInclusion(Include.NON_NULL);
-      mapper.configure(SerializationFeature.WRAP_ROOT_VALUE, true);
-      inputData = mapper.writeValueAsString(input);
-      log.info("InputDataJson:" + inputData);
-
-    } catch (Exception e) {
-      log.error("Error occurred in " + fn, e);
-    }
-
-    String resourceUri = prop.getProperty(SEQ_GENERATOR_URL);
-    log.info(fn + "resourceUri= " + resourceUri);
-
-    EncryptionTool et = EncryptionTool.getInstance();
-    String pass = et.decrypt(prop.getProperty(SEQ_GENERATOR_PWD));
-
-    transaction.setPayload(inputData);
-    transaction.setExecutionRPC("POST");
-    transaction.setuId(prop.getProperty(SEQ_GENERATOR_UID));
-    transaction.setPswd(pass);
-    transaction.setExecutionEndPoint(resourceUri);
-
-    return inputData;
-  }
-
-  DependencyInfo getDependencyInfo(SvcLogicContext ctx) throws SvcLogicException, IOException {
-
-    String fn = "FlowExecutorNode.getDependencyInfo";
-    String dependencyData = dbService.getDependencyInfo(ctx);
-    log.info(fn + "dependencyDataInput:" + dependencyData);
-
-    DependencyInfo dependencyInfo = new DependencyInfo();
-    if (dependencyData == null) {
-      return dependencyInfo;
-    }
-
-    ObjectMapper mapper = new ObjectMapper();
-    mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
-    mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
-    //JsonNode dependencyInfoData = mapper.readTree(dependencyData).get("dependencyInfo");
-    JsonNode vnfcData = mapper.readTree(dependencyData).get("vnfcs");
-    dependencyInfo.getVnfcs().addAll(mapper.readValue(vnfcData.toString(), new TypeReference<List<Vnfcs>>(){}));
-
-    log.info("Dependency Output:" + dependencyInfo.toString());
-    return dependencyInfo;
-  }
-
-  Capabilities getCapabilitiesData(SvcLogicContext ctx) throws SvcLogicException, IOException {
-
-    String fn = "FlowExecutorNode.getCapabilitiesData";
-    String capabilitiesData = dbService.getCapabilitiesData(ctx);
-    log.info(fn + "capabilitiesDataInput:" + capabilitiesData);
-
-    Capabilities capabilities = new Capabilities();
-    if (capabilitiesData == null) {
-      return capabilities;
-    }
-
-    ObjectMapper mapper = new ObjectMapper();
-    mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
-    mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
-
-    JsonNode capabilitiesNode = mapper.readTree(capabilitiesData);
-    log.info("capabilitiesNode:" + capabilitiesNode.toString());
-
-    capabilities.getVfModule().addAll(extractParameterList(mapper, capabilitiesNode, VF_MODULE));
-    capabilities.getVnfc().addAll(extractParameterList(mapper, capabilitiesNode, VNFC));
-    capabilities.getVnf().addAll(extractParameterList(mapper, capabilitiesNode, VNF));
-    capabilities.getVm().addAll(extractParameterList(mapper, capabilitiesNode, VM));
-
-    log.info("Capabilities Output:" + capabilities.toString());
-
-    return capabilities;
-  }
-
-  private <T> List<T> extractParameterList(ObjectMapper mapper, JsonNode root, String parameter) throws IOException {
-    JsonNode parameterNode = root.get(parameter);
-    if (parameterNode == null) {
-      return new ArrayList<>();
-    }
-    return mapper.readValue(parameterNode.toString(), new TypeReference<List<T>>() {});
-  }
-
-  private Properties loadProperties() throws Exception {
-    String directory = envVariables.getenv(SDNC_CONFIG_DIR_VAR);
-    if (directory == null) {
-      throw new Exception("Cannot find Property file -" + SDNC_CONFIG_DIR_VAR);
-    }
-    String path = directory + APPC_FLOW_CONTROLLER;
-    return PropertiesLoader.load(path);
-  }
 }
diff --git a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/FlowSequenceGenerator.java b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/FlowSequenceGenerator.java
new file mode 100644
index 000000000..db5791305
--- /dev/null
+++ b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/FlowSequenceGenerator.java
@@ -0,0 +1,149 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2018 Nokia. 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.appc.flow.controller.node;
+
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.DESINGTIME;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.EXTERNAL;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.FLOW_SEQUENCE;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.GENERATION_NODE;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.RUNTIME;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.SEQUENCE_TYPE;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNFC_TYPE;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNF_TYPE;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.util.Map;
+import org.json.JSONObject;
+import org.onap.appc.flow.controller.data.Transaction;
+import org.onap.appc.flow.controller.data.Transactions;
+import org.onap.appc.flow.controller.dbervices.FlowControlDBService;
+import org.onap.appc.flow.controller.executorImpl.GraphExecutor;
+import org.onap.appc.flow.controller.executorImpl.RestExecutor;
+import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
+
+/**
+ * Helper class for FlowControlNode
+ */
+class FlowSequenceGenerator {
+
+  private static final EELFLogger log = EELFManager.getInstance().getLogger(FlowSequenceGenerator.class);
+
+  static final String MODULE = "APPC_COMMOM";
+
+  private final FlowControlDBService dbService;
+  private final FlowGenerator flowGenerator;
+  private final GraphExecutor transactionExecutor;
+  private final RestExecutor restExecutor;
+  private final InputParamsCollector inputParamsCollector;
+
+  FlowSequenceGenerator() {
+    this.dbService = FlowControlDBService.initialise();
+    this.flowGenerator = new FlowGenerator();
+    this.transactionExecutor = new GraphExecutor();
+    this.restExecutor = new RestExecutor();
+    this.inputParamsCollector = new InputParamsCollector();
+  }
+
+  /**
+   * Constructor for tests, prefer to use default one
+   */
+  FlowSequenceGenerator(FlowControlDBService dbService, FlowGenerator flowGenerator,
+      GraphExecutor graphExecutor, RestExecutor restExecutor, EnvVariables envVariables) {
+    this.dbService = dbService;
+    this.flowGenerator = flowGenerator;
+    this.transactionExecutor = graphExecutor;
+    this.restExecutor = restExecutor;
+    this.inputParamsCollector = new InputParamsCollector(envVariables, dbService);
+  }
+
+  String getFlowSequence(Map<String, String> inParams, SvcLogicContext ctx, SvcLogicContext localContext)
+      throws Exception {
+
+    String flowSequence;
+    if (localContext.getAttribute(SEQUENCE_TYPE) == null) {
+      Transactions trans = flowGenerator.createSingleStepModel(inParams, ctx);
+      ObjectMapper mapper = new ObjectMapper();
+      flowSequence = mapper.writeValueAsString(trans);
+      log.debug("Single step Flow Sequence : " + flowSequence);
+
+      return flowSequence;
+    }
+
+    if (localContext.getAttribute(GENERATION_NODE) != null) {
+      flowSequence = generationNode(localContext.getAttribute(GENERATION_NODE));
+    } else {
+      flowSequence = getFlowSequenceFromType(ctx, localContext, localContext.getAttribute(SEQUENCE_TYPE));
+    }
+    return flowSequence;
+  }
+
+  private String generationNode(String generationNode) throws Exception {
+    if (!transactionExecutor.hasGraph(MODULE, generationNode, null, "sync")) {
+      throw new Exception("Can not find Custom defined Flow Generator for " + generationNode);
+    }
+    return transactionExecutor
+        .executeGraph(MODULE, generationNode, null, "sync", null)
+        .getProperty(FLOW_SEQUENCE);
+  }
+
+  private String getFlowSequenceFromType(SvcLogicContext ctx, SvcLogicContext localContext,
+      String sequenceType) throws Exception {
+    String flowSequence;
+    String vnfType = ctx.getAttribute(VNF_TYPE);
+    if (sequenceType.equalsIgnoreCase(DESINGTIME)) {
+
+      localContext.setAttribute(VNFC_TYPE, ctx.getAttribute(VNFC_TYPE));
+      flowSequence = dbService.getDesignTimeFlowModel(localContext);
+
+      if (flowSequence == null) {
+        throw new Exception("Flow Sequence is not found User Designed VNF " + vnfType);
+      }
+    } else if (sequenceType.equalsIgnoreCase(RUNTIME)) {
+
+      Transaction transaction = inputParamsCollector.collectInputParams(ctx);
+      log.info("CollectInputParamsData-Input: " + transaction.getPayload());
+
+      Map<String, String> flowSeq = restExecutor.execute(transaction, localContext);
+
+      JSONObject output = new JSONObject(flowSeq.get("restResponse")).optJSONObject("output");
+      if (output == null) {
+        throw new Exception("Failed to get the Flow Sequence runtime for VNF type " + vnfType);
+      }
+      flowSequence = output.toString();
+      log.info("MultistepSequenceGenerator-Output: " + flowSequence);
+
+    } else if (sequenceType.equalsIgnoreCase(EXTERNAL)) {
+      //String input = collectInputParams(localContext);
+      //    flowSequnce = ""; //get it from the External interface calling the Rest End point - TBD
+      //if(flowSequnce == null)
+
+      throw new Exception("Flow Sequence not found for " + vnfType);
+
+    } else {
+      //No other type of model supported...
+      //in Future can get flowModel from other generators which will be included here
+      throw new Exception("No information found for sequence Owner Design-Time Vs Run-Time");
+    }
+    return flowSequence;
+  }
+
+}
diff --git a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/InputParamsCollector.java b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/InputParamsCollector.java
new file mode 100644
index 000000000..1a7e2bc00
--- /dev/null
+++ b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/InputParamsCollector.java
@@ -0,0 +1,193 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2018 Nokia. 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.appc.flow.controller.node;
+
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.ACTION_LEVEL;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.APPC_FLOW_CONTROLLER;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.PAYLOAD;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.REQUEST_ACTION;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.SEQ_GENERATOR_PWD;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.SEQ_GENERATOR_UID;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.SEQ_GENERATOR_URL;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNFC_NAME;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNF_ID;
+import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VSERVER_ID;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import java.io.IOException;
+import java.util.List;
+import java.util.Properties;
+import java.util.function.Consumer;
+import org.apache.commons.lang3.StringUtils;
+import org.onap.appc.flow.controller.data.Transaction;
+import org.onap.appc.flow.controller.dbervices.FlowControlDBService;
+import org.onap.appc.flow.controller.interfaceData.ActionIdentifier;
+import org.onap.appc.flow.controller.interfaceData.Capabilities;
+import org.onap.appc.flow.controller.interfaceData.DependencyInfo;
+import org.onap.appc.flow.controller.interfaceData.Input;
+import org.onap.appc.flow.controller.interfaceData.InventoryInfo;
+import org.onap.appc.flow.controller.interfaceData.RequestInfo;
+import org.onap.appc.flow.controller.interfaceData.Vnfcs;
+import org.onap.appc.flow.controller.utils.EncryptionTool;
+import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
+import org.onap.ccsdk.sli.core.sli.SvcLogicException;
+
+class InputParamsCollector {
+
+  private static final EELFLogger log = EELFManager.getInstance().getLogger(InputParamsCollector.class);
+
+  private final EnvVariables envVariables;
+  private final FlowControlDBService dbService;
+
+  static final String SDNC_CONFIG_DIR_VAR = "SDNC_CONFIG_DIR";
+
+  InputParamsCollector() {
+    this.envVariables = new EnvVariables();
+    this.dbService = FlowControlDBService.initialise();
+  }
+
+  InputParamsCollector(EnvVariables envVariables, FlowControlDBService dbService) {
+    this.envVariables = envVariables;
+    this.dbService = dbService;
+  }
+
+  Transaction collectInputParams(SvcLogicContext ctx) throws Exception {
+
+    String fn = "FlowExecuteNode.collectInputParams";
+    Properties prop = loadProperties();
+    log.info("Loaded Properties " + prop.toString());
+
+    String vnfId = ctx.getAttribute(VNF_ID);
+    log.debug(fn + "vnfId :" + vnfId);
+
+    if (StringUtils.isBlank(vnfId)) {
+      throw new Exception("VnfId is missing");
+    }
+
+    String resourceUri = prop.getProperty(SEQ_GENERATOR_URL);
+    log.info(fn + "resourceUri= " + resourceUri);
+
+    String pass = EncryptionTool.getInstance().decrypt(prop.getProperty(SEQ_GENERATOR_PWD));
+
+    Transaction transaction = new Transaction();
+    transaction.setPayload(getInputData(ctx, fn, vnfId));
+    transaction.setExecutionRPC("POST");
+    transaction.setuId(prop.getProperty(SEQ_GENERATOR_UID));
+    transaction.setPswd(pass);
+    transaction.setExecutionEndPoint(resourceUri);
+
+    return transaction;
+  }
+
+  private String getInputData(SvcLogicContext ctx, String fn, String vnfId) throws IOException, SvcLogicException {
+    ActionIdentifier actionIdentifier = new ActionIdentifier();
+    log.debug("Enter ActionIdentifier");
+
+    applyIfNotBlank(vnfId, actionIdentifier::setVnfId);
+    applyIfNotBlank(ctx.getAttribute(VSERVER_ID), actionIdentifier::setVserverId);
+    applyIfNotBlank(ctx.getAttribute(VNFC_NAME), actionIdentifier::setVnfcName);
+
+    log.info("ActionIdentifierData" + actionIdentifier.toString());
+
+    log.info("Enter RequestInfo");
+    RequestInfo requestInfo = getRequestInfo(ctx, actionIdentifier);
+    log.debug("RequestInfo: " + requestInfo.toString());
+
+    InventoryInfo inventoryInfo = new InventoryInfoExtractor().getInventoryInfo(ctx, vnfId);
+    Capabilities capabilities = new CapabilitiesDataExtractor(dbService).getCapabilitiesData(ctx);
+    DependencyInfo dependencyInfo = getDependencyInfo(ctx);
+
+    log.info("Enter InputData");
+    Input input = getInput(requestInfo, inventoryInfo, dependencyInfo, capabilities);
+    log.info(fn + "Input parameters:" + input.toString());
+
+    ObjectMapper mapper = new ObjectMapper();
+    mapper.setSerializationInclusion(Include.NON_NULL);
+    mapper.configure(SerializationFeature.WRAP_ROOT_VALUE, true);
+    String inputData = mapper.writeValueAsString(input);
+    log.info("InputDataJson:" + inputData);
+
+    return inputData;
+  }
+
+  private Input getInput(RequestInfo requestInfo, InventoryInfo inventoryInfo,
+      DependencyInfo dependencyInfo, Capabilities capabilities) {
+    Input input = new Input();
+    input.setRequestInfo(requestInfo);
+    input.setInventoryInfo(inventoryInfo);
+    input.setDependencyInfo(dependencyInfo);
+    input.setCapabilities(capabilities);
+    return input;
+  }
+
+  private RequestInfo getRequestInfo(SvcLogicContext ctx, ActionIdentifier actionIdentifier) {
+    RequestInfo requestInfo = new RequestInfo();
+    requestInfo.setAction(ctx.getAttribute(REQUEST_ACTION));
+    requestInfo.setActionLevel(ctx.getAttribute(ACTION_LEVEL));
+    requestInfo.setPayload(ctx.getAttribute(PAYLOAD));
+    requestInfo.setActionIdentifier(actionIdentifier);
+    return requestInfo;
+  }
+
+  DependencyInfo getDependencyInfo(SvcLogicContext ctx) throws SvcLogicException, IOException {
+
+    String fn = "FlowExecutorNode.getDependencyInfo";
+    String dependencyData = dbService.getDependencyInfo(ctx);
+    log.info(fn + "dependencyDataInput:" + dependencyData);
+
+    DependencyInfo dependencyInfo = new DependencyInfo();
+    if (dependencyData == null) {
+      return dependencyInfo;
+    }
+
+    ObjectMapper mapper = new ObjectMapper();
+    mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+    mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
+    //JsonNode dependencyInfoData = mapper.readTree(dependencyData).get("dependencyInfo");
+    JsonNode vnfcData = mapper.readTree(dependencyData).get("vnfcs");
+    dependencyInfo.getVnfcs().addAll(mapper.readValue(vnfcData.toString(), new TypeReference<List<Vnfcs>>(){}));
+
+    log.info("Dependency Output:" + dependencyInfo.toString());
+    return dependencyInfo;
+  }
+
+  private Properties loadProperties() throws Exception {
+    String directory = envVariables.getenv(SDNC_CONFIG_DIR_VAR);
+    if (directory == null) {
+      throw new Exception("Cannot find Property file -" + SDNC_CONFIG_DIR_VAR);
+    }
+    String path = directory + APPC_FLOW_CONTROLLER;
+    return PropertiesLoader.load(path);
+  }
+
+  private void applyIfNotBlank(String parameter, Consumer<String> consumer) {
+    if (StringUtils.isNotBlank(parameter)) {
+      consumer.accept(parameter);
+    }
+  }
+
+}
diff --git a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/JsonValidator.java b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/JsonValidator.java
index 78d530533..038d35b5d 100644
--- a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/JsonValidator.java
+++ b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/JsonValidator.java
@@ -1,3 +1,22 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2018 Nokia. 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.appc.flow.controller.node;
 
 import com.att.eelf.configuration.EELFLogger;
diff --git a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/PropertiesLoader.java b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/PropertiesLoader.java
index 28792bb10..854f476a1 100644
--- a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/PropertiesLoader.java
+++ b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/PropertiesLoader.java
@@ -1,3 +1,22 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2018 Nokia. 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.appc.flow.controller.node;
 
 import java.io.FileInputStream;
diff --git a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/ResourceUriExtractor.java b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/ResourceUriExtractor.java
index cd07952cf..c36a74be7 100644
--- a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/ResourceUriExtractor.java
+++ b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/ResourceUriExtractor.java
@@ -1,3 +1,22 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2018 Nokia. 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.appc.flow.controller.node;
 
 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.HTTP;
diff --git a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/TransactionHandler.java b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/TransactionHandler.java
index af9e84589..b4becd9b1 100644
--- a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/TransactionHandler.java
+++ b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/TransactionHandler.java
@@ -1,3 +1,22 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2018 Nokia. 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.appc.flow.controller.node;
 
 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.INPUT_REQUEST_ACTION;