Fix helm exception when there are no repo's configured

Issue-ID: POLICY-3874
Change-Id: I6734654049abeeb391b58df566992ab102a2894c
Signed-off-by: Lathish <lathishbabu.ganesan@est.tech>

3 files changed, 40 insertions, 21 deletions

diff --git a/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/controller/ChartController.java b/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/controller/ChartController.java
index 19ab4bbab..7d0c6c0d8 100644
--- a/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/controller/ChartController.java
+++ b/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/controller/ChartController.java
@@ -23,6 +23,7 @@ import io.swagger.annotations.ApiOperation;
 import io.swagger.annotations.ApiResponse;
 import io.swagger.annotations.ApiResponses;
 import java.io.IOException;
+import java.lang.invoke.MethodHandles;
 import java.util.ArrayList;
 import org.onap.policy.clamp.acm.participant.kubernetes.exception.ServiceException;
 import org.onap.policy.clamp.acm.participant.kubernetes.models.ChartInfo;
@@ -32,6 +33,8 @@ import org.onap.policy.clamp.acm.participant.kubernetes.models.InstallationInfo;
 import org.onap.policy.clamp.acm.participant.kubernetes.service.ChartService;
 import org.onap.policy.common.utils.coder.CoderException;
 import org.onap.policy.common.utils.coder.StandardCoder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.http.HttpStatus;
@@ -53,6 +56,7 @@ import org.springframework.web.multipart.MultipartFile;
 @RequestMapping("helm")
 @Api(tags = {"k8s-participant"})
 public class ChartController {
+    private final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
 
     @Autowired
     private ChartService chartService;
@@ -179,17 +183,21 @@ public class ChartController {
     @PostMapping(path = "/repo", consumes = MediaType.APPLICATION_JSON_VALUE,
             produces = MediaType.APPLICATION_JSON_VALUE)
     @ApiOperation(value = "Configure helm repository")
-    @ApiResponses(value = {@ApiResponse(code = 201, message = "Repository added")})
+    @ApiResponses(value = {@ApiResponse(code = 201, message = "Repository added"),
+                           @ApiResponse(code = 409, message = "Repository already Exist")})
     public ResponseEntity<Object> configureRepo(@RequestBody String repo)
             throws ServiceException, IOException {
         HelmRepository repository;
         try {
             repository = CODER.decode(repo, HelmRepository.class);
         } catch (CoderException e) {
-            throw new ServiceException("Error parsing the repository information", e);
+            logger.warn("Error parsing the repository information:", e);
+            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+                    .body("Error parsing the repository information");
         }
-        chartService.configureRepository(repository);
-
-        return new ResponseEntity<>(HttpStatus.CREATED);
+        if (chartService.configureRepository(repository)) {
+            return new ResponseEntity<>(HttpStatus.CREATED);
+        }
+        return new ResponseEntity<>(HttpStatus.CONFLICT);
     }
 }
diff --git a/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/helm/HelmClient.java b/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/helm/HelmClient.java
index 87199688e..6a7c62b2e 100644
--- a/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/helm/HelmClient.java
+++ b/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/helm/HelmClient.java
@@ -28,6 +28,7 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.onap.policy.clamp.acm.participant.kubernetes.exception.ServiceException;
 import org.onap.policy.clamp.acm.participant.kubernetes.models.ChartInfo;
 import org.onap.policy.clamp.acm.participant.kubernetes.models.HelmRepository;
@@ -70,17 +71,18 @@ public class HelmClient {
     /**
      * Add repository if doesn't exist.
      * @param repo HelmRepository
+     * @return boolean true of false based on add repo success or failed
      * @throws ServiceException incase of error
      */
-    public void addRepository(HelmRepository repo) throws ServiceException {
-        String output = executeCommand(prepareVerifyRepoCommand(repo));
-        if (output.isEmpty()) {
+    public boolean addRepository(HelmRepository repo) throws ServiceException {
+        if (!verifyHelmRepoAlreadyExist(repo)) {
             logger.info("Adding repository to helm client");
             executeCommand(prepareRepoAddCommand(repo));
             logger.debug("Added repository {} to the helm client", repo.getRepoName());
-        } else {
-            logger.info("Repository already exists");
+            return true;
         }
+        logger.info("Repository already exists");
+        return false;
     }
 
 
@@ -184,7 +186,10 @@ public class HelmClient {
         return null;
     }
 
-    private ProcessBuilder prepareRepoAddCommand(HelmRepository repo) {
+    private ProcessBuilder prepareRepoAddCommand(HelmRepository repo) throws ServiceException {
+        if (StringUtils.isEmpty(repo.getAddress())) {
+            throw new ServiceException("Repository Should have valid address");
+        }
         var url = repo.getProtocol() + "://" + repo.getAddress();
         if (repo.getPort() != null) {
             url =  url + ":" + repo.getPort();
@@ -202,9 +207,19 @@ public class HelmClient {
         return new ProcessBuilder().command(helmArguments);
     }
 
-    private ProcessBuilder prepareVerifyRepoCommand(HelmRepository repo) {
-        List<String> helmArguments = List.of("sh", "-c", "helm repo ls | grep " + repo.getRepoName());
-        return new ProcessBuilder().command(helmArguments);
+    private boolean verifyHelmRepoAlreadyExist(HelmRepository repo) {
+        try {
+            logger.debug("Verify the repo already exist in helm repositories");
+            List<String> helmArguments = List.of("sh", "-c", "helm repo list | grep " + repo.getRepoName());
+            String response = executeCommand(new ProcessBuilder().command(helmArguments));
+            if (StringUtils.isEmpty(response)) {
+                return false;
+            }
+        } catch (ServiceException e) {
+            logger.debug("Repository {} not found:", repo.getRepoName(), e);
+            return false;
+        }
+        return true;
     }
 
     private ProcessBuilder prepareVerifyNamespaceCommand(String namespace) {
@@ -265,8 +280,6 @@ public class HelmClient {
             return false;
         }
         return true;
-
-
     }
 
     private boolean verifyLocalHelmRepo(File localFile) {
diff --git a/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/service/ChartService.java b/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/service/ChartService.java
index 344d161b7..dc4762d9a 100644
--- a/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/service/ChartService.java
+++ b/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/service/ChartService.java
@@ -1,6 +1,6 @@
 /*-
  * ========================LICENSE_START=================================
- * Copyright (C) 2021 Nordix Foundation. All rights reserved.
+ * Copyright (C) 2021-2022 Nordix Foundation. 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.
@@ -111,10 +111,8 @@ public class ChartService {
      * @param repo HelmRepository
      * @throws ServiceException incase of error
      */
-    public void configureRepository(HelmRepository repo) throws ServiceException {
-        if (repo.getAddress() != null) {
-            helmClient.addRepository(repo);
-        }
+    public boolean configureRepository(HelmRepository repo) throws ServiceException {
+        return helmClient.addRepository(repo);
     }
 
     /**