Remove un-needed cacheing layer for OS Clients

Remove un-needed cacheing layer for OS Clients

Change-Id: I7fbb6e23a3c34f65286202ec4dad1fb051991cf0
Issue-ID: SO-1500
Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>

3 files changed, 2 insertions, 147 deletions

diff --git a/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoHeatUtils.java b/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoHeatUtils.java
index 14aee2f4f2..20498cb694 100644
--- a/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoHeatUtils.java
+++ b/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoHeatUtils.java
@@ -103,13 +103,6 @@ public class MsoHeatUtils extends MsoCommonUtils implements VduPlugin{
 
     protected static final String CREATE_STACK = "CreateStack";
 
-    // Cache Heat Clients statically. Since there is just one MSO user, there is no
-    // benefit to re-authentication on every request (or across different flows). The
-    // token will be used until it expires.
-    //
-    // The cache key is "tenantId:cloudId"
-    private static Map <String, HeatCacheEntry> heatClientCache = new HashMap <> ();
-
     // Fetch cloud configuration each time (may be cached in CloudConfig class)
     @Autowired
     protected CloudConfig cloudConfig;
@@ -859,19 +852,6 @@ public class MsoHeatUtils extends MsoCommonUtils implements VduPlugin{
         String cloudId = cloudSite.getId();
         // For DCP/LCP, the region should be the cloudId.
         String region = cloudSite.getRegionId ();
-        
-        // Check first in the cache of previously authorized clients
-        String cacheKey = cloudId + ":" + tenantId;
-        if (heatClientCache.containsKey (cacheKey)) {
-            if (!heatClientCache.get (cacheKey).isExpired ()) {
-                LOGGER.debug ("Using Cached HEAT Client for " + cacheKey);
-                return heatClientCache.get (cacheKey).getHeatClient ();
-            } else {
-                // Token is expired. Remove it from cache.
-                heatClientCache.remove (cacheKey);
-                LOGGER.debug ("Expired Cached HEAT Client for " + cacheKey);
-            }
-        }
 
         // Obtain an MSO token for the tenant
         CloudIdentity cloudIdentity = cloudSite.getIdentityService();
@@ -946,38 +926,11 @@ public class MsoHeatUtils extends MsoCommonUtils implements VduPlugin{
             // Catch-all
             throw runtimeExceptionToMsoException (e, TOKEN_AUTH);
         }
-
         Heat heatClient = new Heat (heatUrl);
         heatClient.token (tokenId);
-
-        heatClientCache.put (cacheKey,
-                             new HeatCacheEntry (heatUrl,
-                                                 tokenId,
-                                                 expiration));
-        LOGGER.debug ("Caching HEAT Client for " + cacheKey);
-
         return heatClient;
     }
 
-    /**
-     * Forcibly expire a HEAT client from the cache. This call is for use by
-     * the KeystoneClient in case where a tenant is deleted. In that case,
-     * all cached credentials must be purged so that fresh authentication is
-     * done if a similarly named tenant is re-created.
-     * <p>
-     * Note: This is probably only applicable to dev/test environments where
-     * the same Tenant Name is repeatedly used for creation/deletion.
-     * <p>
-     *
-     */
-    public void expireHeatClient (String tenantId, String cloudId) {
-        String cacheKey = cloudId + ":" + tenantId;
-        if (heatClientCache.containsKey (cacheKey)) {
-            heatClientCache.remove (cacheKey);
-            LOGGER.debug ("Deleted Cached HEAT Client for " + cacheKey);
-        }
-    }
-
     /*
      * Query for a Heat Stack. This function is needed in several places, so
      * a common method is useful. This method takes an authenticated Heat Client
diff --git a/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoKeystoneUtils.java b/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoKeystoneUtils.java
index 3936ae6496..0bd2a3931f 100644
--- a/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoKeystoneUtils.java
+++ b/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoKeystoneUtils.java
@@ -59,12 +59,6 @@ import com.woorea.openstack.keystone.utils.KeystoneUtils;
 @Component
 public class MsoKeystoneUtils extends MsoTenantUtils {
 
-    // Cache the Keystone Clients statically. Since there is just one MSO user, there is no
-    // benefit to re-authentication on every request (or across different flows). The
-    // token will be used until it expires.
-    //
-    // The cache key is "cloudId"
-    private static Map <String, KeystoneCacheEntry> adminClientCache = new HashMap<>();
 
 	private static MsoLogger LOGGER = MsoLogger.getMsoLogger (MsoLogger.Catalog.RA, MsoKeystoneUtils.class);
 	
@@ -316,10 +310,6 @@ public class MsoKeystoneUtils extends MsoTenantUtils {
             OpenStackRequest <Void> request = keystoneAdminClient.tenants ().delete (tenant.getId ());
             executeAndRecordOpenstackRequest (request);
             LOGGER.debug ("Deleted Tenant " + tenant.getId () + " (" + tenant.getName () + ")");
-
-            // Clear any cached clients. Not really needed, ID will not be reused.
-            msoHeatUtils.expireHeatClient (tenant.getId (), cloudSiteId);
-            msoNeutronUtils.expireNeutronClient (tenant.getId (), cloudSiteId);
         } catch (OpenStackBaseException e) {
             // Convert Keystone OpenStackResponseException to MsoOpenstackException
             throw keystoneErrorToMsoException (e, "Delete Tenant");
@@ -369,9 +359,6 @@ public class MsoKeystoneUtils extends MsoTenantUtils {
 
             LOGGER.debug ("Deleted Tenant " + tenant.getId () + " (" + tenant.getName () + ")");
 
-            // Clear any cached clients. Not really needed, ID will not be reused.
-            msoHeatUtils.expireHeatClient (tenant.getId (), cloudSiteId);
-            msoNeutronUtils.expireNeutronClient (tenant.getId (), cloudSiteId);
         } catch (OpenStackBaseException e) {
             // Note: It doesn't seem to matter if tenant doesn't exist, no exception is thrown.
             // Convert Keystone OpenStackResponseException to MsoOpenstackException
@@ -407,16 +394,6 @@ public class MsoKeystoneUtils extends MsoTenantUtils {
         String adminTenantName = cloudIdentity.getAdminTenant ();
         String region = cloudSite.getRegionId ();
 
-        // Check first in the cache of previously authorized clients
-        KeystoneCacheEntry entry = adminClientCache.get (cloudId);
-        if (entry != null) {
-            if (!entry.isExpired ()) {
-                return entry.getKeystoneClient ();
-            } else {
-                // Token is expired. Remove it from cache.
-                adminClientCache.remove (cloudId);
-            }
-        }
         MsoTenantUtils tenantUtils = tenantUtilsFactory.getTenantUtilsByServerType(cloudIdentity.getIdentityServerType());
         final String keystoneUrl = tenantUtils.getKeystoneUrl(region, cloudIdentity);
         Keystone keystone = new Keystone(keystoneUrl);
@@ -462,11 +439,6 @@ public class MsoKeystoneUtils extends MsoTenantUtils {
         // Note: this doesn't go back to Openstack, it's just a local object.
         keystone = new Keystone (adminUrl);
         keystone.token (token);
-
-        // Cache to avoid re-authentication for every call.
-        KeystoneCacheEntry cacheEntry = new KeystoneCacheEntry (adminUrl, token, access.getToken ().getExpires ());
-        adminClientCache.put (cloudId, cacheEntry);
-
         return keystone;
     }
 
@@ -636,32 +608,6 @@ public class MsoKeystoneUtils extends MsoTenantUtils {
         return null;
     }
 
-    private static class KeystoneCacheEntry implements Serializable {
-
-        private static final long serialVersionUID = 1L;
-
-        private String keystoneUrl;
-        private String token;
-        private Calendar expires;
-
-        public KeystoneCacheEntry (String url, String token, Calendar expires) {
-            this.keystoneUrl = url;
-            this.token = token;
-            this.expires = expires;
-        }
-
-        public Keystone getKeystoneClient () {
-            Keystone keystone = new Keystone (keystoneUrl);
-            keystone.token (token);
-            return keystone;
-        }
-
-        public boolean isExpired () {
-            // adding arbitrary guard timer of 5 minutes
-            return expires == null || System.currentTimeMillis() > (expires.getTimeInMillis() - 1800000);
-        }
-    }
-
 	@Override
 	public String getKeystoneUrl(String regionId, CloudIdentity cloudIdentity) throws MsoException {
 		return cloudIdentity.getIdentityUrl();
diff --git a/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoNeutronUtils.java b/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoNeutronUtils.java
index 7b82ad62ff..785e8606d3 100644
--- a/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoNeutronUtils.java
+++ b/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoNeutronUtils.java
@@ -67,12 +67,6 @@ import com.woorea.openstack.quantum.model.Segment;
 @Component
 public class MsoNeutronUtils extends MsoCommonUtils
 {
-	// Cache Neutron Clients statically.  Since there is just one MSO user, there is no
-	// benefit to re-authentication on every request (or across different flows).  The
-	// token will be used until it expires.
-	//
-	// The cache key is "tenantId:cloudId"
-	private static Map<String,NeutronCacheEntry> neutronClientCache = new HashMap<>();
 
 	// Fetch cloud configuration each time (may be cached in CloudConfig class)
 	@Autowired
@@ -364,24 +358,8 @@ public class MsoNeutronUtils extends MsoCommonUtils
     private Quantum getNeutronClient(CloudSite cloudSite, String tenantId) throws MsoException
 	{
 		String cloudId = cloudSite.getId();
-		String region = cloudSite.getRegionId();
-		
-		// Check first in the cache of previously authorized clients
-		String cacheKey = cloudId + ":" + tenantId;
-		if (neutronClientCache.containsKey(cacheKey)) {
-			if (! neutronClientCache.get(cacheKey).isExpired()) {
-				LOGGER.debug ("Using Cached HEAT Client for " + cacheKey);
-				NeutronCacheEntry cacheEntry = neutronClientCache.get(cacheKey);
-				Quantum neutronClient = new Quantum(cacheEntry.getNeutronUrl());
-				neutronClient.token(cacheEntry.getToken());
-				return neutronClient;
-			}
-			else {
-				// Token is expired.  Remove it from cache.
-				neutronClientCache.remove(cacheKey);
-				LOGGER.debug ("Expired Cached Neutron Client for " + cacheKey);
-			}
-		}
+		String region = cloudSite.getRegionId();	
+
 
 		// Obtain an MSO token for the tenant from the identity service
 		CloudIdentity cloudIdentity = cloudSite.getIdentityService();
@@ -454,31 +432,9 @@ public class MsoNeutronUtils extends MsoCommonUtils
 
 		Quantum neutronClient = new Quantum(neutronUrl);
 		neutronClient.token(tokenId);
-
-		neutronClientCache.put(cacheKey, new NeutronCacheEntry(neutronUrl, tokenId, expiration));
-		LOGGER.debug ("Caching Neutron Client for " + cacheKey);
-
 		return neutronClient;
 	}
 
-	/**
-	 * Forcibly expire a Neutron client from the cache.  This call is for use by
-	 * the KeystoneClient in case where a tenant is deleted.  In that case,
-	 * all cached credentials must be purged so that fresh authentication is
-	 * done on subsequent calls.
-	 * <p>
-	 * @param tenantName
-	 * @param cloudId
-	 */
-	public void expireNeutronClient (String tenantId, String cloudId) {
-		String cacheKey = cloudId + ":" + tenantId;
-		if (neutronClientCache.containsKey(cacheKey)) {
-			neutronClientCache.remove(cacheKey);
-			LOGGER.debug ("Deleted Cached Neutron Client for " + cacheKey);
-		}
-	}
-
-
 	/*
 	 * Find a tenant (or query its existence) by its Name or Id.  Check first against the
 	 * ID.  If that fails, then try by name.