1 files changed, 75 insertions, 0 deletions
diff --git a/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/write/RoutingInstanceCustomizer.java b/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/write/RoutingInstanceCustomizer.java
new file mode 100644
index 000000000..fa6885d5d
--- /dev/null
+++ b/routing/routing-impl/src/main/java/io/fd/hc2vpp/routing/write/RoutingInstanceCustomizer.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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.
+ */
+
+package io.fd.hc2vpp.routing.write;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import io.fd.hc2vpp.routing.RoutingConfiguration;
+import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
+import io.fd.honeycomb.translate.write.WriteContext;
+import io.fd.honeycomb.translate.write.WriteFailedException;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev140524.routing.RoutingInstance;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev140524.routing.RoutingInstanceKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Only ensures that requests are written under singleton instance
+ */
+public class RoutingInstanceCustomizer implements ListWriterCustomizer<RoutingInstance, RoutingInstanceKey> {
+
+    private final RoutingConfiguration configuration;
+
+    public RoutingInstanceCustomizer(@Nonnull final RoutingConfiguration configuration) {
+        this.configuration = configuration;
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<RoutingInstance> id,
+                                       @Nonnull final RoutingInstance dataAfter,
+                                       @Nonnull final WriteContext writeContext)
+            throws WriteFailedException {
+        checkSingletonInstance(dataAfter);
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<RoutingInstance> id,
+                                        @Nonnull final RoutingInstance dataBefore,
+                                        @Nonnull final RoutingInstance dataAfter,
+                                        @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter,
+                new UnsupportedOperationException("Operation not supported"));
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<RoutingInstance> id,
+                                        @Nonnull final RoutingInstance dataBefore,
+                                        @Nonnull final WriteContext writeContext)
+            throws WriteFailedException {
+        checkSingletonInstance(dataBefore);
+    }
+
+    private void checkSingletonInstance(final RoutingInstance data) {
+        final String defaultRoutingInstanceName = configuration.getDefaultRoutingInstanceName();
+        final String instanceName = data.getName();
+
+        checkArgument(defaultRoutingInstanceName.equals(instanceName),
+                "Attempt to write/delete data for different than default routing instance detected." +
+                        "Vpp allows only single instance, configured with name %s, request contains name %s",
+                defaultRoutingInstanceName, instanceName);
+    }
+}