HC2VPP-308: forbid local0 deletion

Adds special case for local0 in InterfaceCustomizer.deleteCurrentAttributes.

Change-Id: I1eb0826f90bd5dbbdb3b6cbb4b19ac5cadb1a68f
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

2 files changed, 23 insertions, 4 deletions

diff --git a/v3po/v3po2vpp/src/main/java/io/fd/hc2vpp/v3po/interfaces/InterfaceCustomizer.java b/v3po/v3po2vpp/src/main/java/io/fd/hc2vpp/v3po/interfaces/InterfaceCustomizer.java
index be50aa6b7..2f155bb87 100644
--- a/v3po/v3po2vpp/src/main/java/io/fd/hc2vpp/v3po/interfaces/InterfaceCustomizer.java
+++ b/v3po/v3po2vpp/src/main/java/io/fd/hc2vpp/v3po/interfaces/InterfaceCustomizer.java
@@ -40,6 +40,8 @@ public class InterfaceCustomizer extends FutureJVppCustomizer
         implements ListWriterCustomizer<Interface, InterfaceKey>, JvppReplyConsumer {
 
     private static final Logger LOG = LoggerFactory.getLogger(InterfaceCustomizer.class);
+    private static final String LOCAL0_NAME = "local0";
+
     private final NamingContext interfaceContext;
 
     public InterfaceCustomizer(final FutureJVppCore vppApi, final NamingContext interfaceContext) {
@@ -68,8 +70,14 @@ public class InterfaceCustomizer extends FutureJVppCustomizer
     @Override
     public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Interface> id,
                                         @Nonnull final Interface dataBefore,
-                                        @Nonnull final WriteContext writeContext) {
-        // Nothing to be done here, customizers for specific interface types e.g. vxlan handle the delete
+                                        @Nonnull final WriteContext writeContext)
+        throws WriteFailedException.DeleteFailedException {
+        // Special handling for local0 interface (HC2VPP-308):
+        if (LOCAL0_NAME.equals(dataBefore.getName())) {
+            throw new WriteFailedException.DeleteFailedException(id,
+                new UnsupportedOperationException("Removing " + LOCAL0_NAME + " interface is not supported"));
+        }
+        // For other interfaces, delegate delete  to customizers for specific interface types (e.g. VXLan, Tap).
     }
 
     private void setInterface(final InstanceIdentifier<Interface> id, final Interface swIf,
diff --git a/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfaces/InterfaceCustomizerTest.java b/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfaces/InterfaceCustomizerTest.java
index d33211842..6a659f484 100644
--- a/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfaces/InterfaceCustomizerTest.java
+++ b/v3po/v3po2vpp/src/test/java/io/fd/hc2vpp/v3po/interfaces/InterfaceCustomizerTest.java
@@ -43,10 +43,14 @@ public class InterfaceCustomizerTest extends WriterCustomizerTest implements Byt
     private static final String IF_NAME = "eth1";
     private static final int IF_INDEX = 1;
 
-    private InterfaceCustomizer customizer;
-    private InstanceIdentifier<Interface> IID =
+    private static final InstanceIdentifier<Interface> IID =
         InstanceIdentifier.create(Interfaces.class).child(Interface.class, new InterfaceKey(IF_NAME));
 
+    private static final String LOCAL0_IFC_NAME = "local0";
+    private static final InstanceIdentifier<Interface> LOCAL0_IID =
+        InstanceIdentifier.create(Interfaces.class).child(Interface.class, new InterfaceKey(LOCAL0_IFC_NAME));
+    private InterfaceCustomizer customizer;
+
     @Override
     protected void setUpTest() throws Exception {
         customizer = new InterfaceCustomizer(api, new NamingContext("ifacePrefix", IFACE_CTX_NAME));
@@ -101,6 +105,13 @@ public class InterfaceCustomizerTest extends WriterCustomizerTest implements Byt
         verifyZeroInteractions(api);
     }
 
+    @Test(expected = WriteFailedException.DeleteFailedException.class)
+    public void testDeleteLocal0() throws WriteFailedException {
+        final Interface ifc = mock(Interface.class);
+        when(ifc.getName()).thenReturn(LOCAL0_IFC_NAME);
+        customizer.deleteCurrentAttributes(LOCAL0_IID, ifc, writeContext);
+    }
+
     private Interface iface(final boolean enabled) {
         return new InterfaceBuilder().setName(IF_NAME).setEnabled(enabled).build();
     }