1 files changed, 82 insertions, 0 deletions
diff --git a/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/service/GpeStateCheckServiceImpl.java b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/service/GpeStateCheckServiceImpl.java
new file mode 100644
index 000000000..b09b7ad98
--- /dev/null
+++ b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/service/GpeStateCheckServiceImpl.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2017 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.lisp.gpe.translate.service;
+
+import static com.google.common.base.Preconditions.checkState;
+import static io.fd.honeycomb.translate.util.read.cache.EntityDumpExecutor.NO_PARAMS;
+
+import com.google.inject.Inject;
+import io.fd.hc2vpp.common.translate.util.ByteDataTranslator;
+import io.fd.hc2vpp.common.translate.util.JvppReplyConsumer;
+import io.fd.honeycomb.translate.read.ReadContext;
+import io.fd.honeycomb.translate.read.ReadFailedException;
+import io.fd.honeycomb.translate.util.read.cache.DumpCacheManager;
+import io.fd.honeycomb.translate.util.read.cache.DumpCacheManager.DumpCacheManagerBuilder;
+import io.fd.honeycomb.translate.write.WriteContext;
+import io.fd.vpp.jvpp.core.dto.ShowLispStatus;
+import io.fd.vpp.jvpp.core.dto.ShowLispStatusReply;
+import io.fd.vpp.jvpp.core.future.FutureJVppCore;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.Gpe;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.GpeState;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.gpe.feature.data.grouping.GpeFeatureData;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.gpe.feature.data.grouping.GpeFeatureDataBuilder;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+public final class GpeStateCheckServiceImpl implements GpeStateCheckService, JvppReplyConsumer, ByteDataTranslator {
+
+    private static final GpeFeatureData DISABLED_GPE = new GpeFeatureDataBuilder().build();
+    private static final InstanceIdentifier<GpeFeatureData>
+            GPE_FEATURE_CONFIG_ID = InstanceIdentifier.create(Gpe.class)
+            .child(GpeFeatureData.class);
+    private static final InstanceIdentifier<GpeFeatureData>
+            GPE_FEATURE_STATE_ID = InstanceIdentifier.create(GpeState.class).child(GpeFeatureData.class);
+    private static final ShowLispStatusReply DEFAULT_REPLY = new ShowLispStatusReply();
+    private final DumpCacheManager<ShowLispStatusReply, Void> dumpCacheManager;
+
+    @Inject
+    public GpeStateCheckServiceImpl(@Nonnull final FutureJVppCore api) {
+        dumpCacheManager = new DumpCacheManagerBuilder<ShowLispStatusReply, Void>()
+                .acceptOnly(ShowLispStatusReply.class)
+                .withExecutor((identifier, params) -> getReplyForRead(
+                        api.showLispStatus(new ShowLispStatus()).toCompletableFuture(), identifier))
+                .build();
+    }
+
+    @Override
+    public void checkGpeEnabledBefore(@Nonnull final WriteContext writeContext) {
+        checkState(writeContext.readBefore(GPE_FEATURE_CONFIG_ID).or(DISABLED_GPE).isEnable(),
+                "Gpe feature is disabled");
+    }
+
+    @Override
+    public void checkGpeEnabledAfter(@Nonnull final WriteContext writeContext) {
+        checkState(writeContext.readAfter(GPE_FEATURE_CONFIG_ID).or(DISABLED_GPE).isEnable(),
+                "Gpe feature is disabled");
+    }
+
+    @Override
+    public boolean isGpeEnabled(@Nonnull final ReadContext readContext) {
+        try {
+            return byteToBoolean(
+                    dumpCacheManager.getDump(GPE_FEATURE_STATE_ID, readContext.getModificationCache(), NO_PARAMS)
+                            .or(DEFAULT_REPLY).gpeStatus);
+        } catch (ReadFailedException e) {
+            throw new IllegalStateException("Unable to read Gpe feature status", e);
+        }
+    }
+}