1 files changed, 70 insertions, 0 deletions
diff --git a/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/translate/service/LispStateCheckServiceImpl.java b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/translate/service/LispStateCheckServiceImpl.java
new file mode 100644
index 000000000..8d46e9bed
--- /dev/null
+++ b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/translate/service/LispStateCheckServiceImpl.java
@@ -0,0 +1,70 @@
+/*
+ * 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.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.lisp.rev170315.Lisp;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.lisp.rev170315.LispBuilder;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+public final class LispStateCheckServiceImpl implements LispStateCheckService, JvppReplyConsumer, ByteDataTranslator {
+
+    private static final Lisp STATIC_LISP_INSTANCE = new LispBuilder().setEnable(false).build();
+    private static final ShowLispStatusReply DEFAULT_REPLY = new ShowLispStatusReply();
+    private static final InstanceIdentifier<Lisp> IDENTIFIER = InstanceIdentifier.create(Lisp.class);
+
+    private final DumpCacheManager<ShowLispStatusReply, Void> dumpManager;
+
+    @Inject
+    public LispStateCheckServiceImpl(@Nonnull final FutureJVppCore vppApi) {
+        dumpManager = new DumpCacheManagerBuilder<ShowLispStatusReply, Void>()
+                .withExecutor((instanceIdentifier, aVoid) -> getReplyForRead(vppApi.showLispStatus(new ShowLispStatus())
+                        .toCompletableFuture(), instanceIdentifier))
+                .acceptOnly(ShowLispStatusReply.class)
+                .build();
+    }
+
+    public void checkLispEnabled(@Nonnull final WriteContext ctx) {
+        // no need to dump here, can be read directly from context
+        checkState(ctx.readAfter(InstanceIdentifier.create(Lisp.class))
+                .or(STATIC_LISP_INSTANCE).isEnable(), "Lisp feature not enabled");
+    }
+
+    public boolean lispEnabled(@Nonnull final ReadContext ctx) {
+        // in this case it must be dumped
+        try {
+            return byteToBoolean(dumpManager.getDump(IDENTIFIER, ctx.getModificationCache(), NO_PARAMS)
+                    .or(DEFAULT_REPLY).featureStatus);
+        } catch (ReadFailedException e) {
+            throw new IllegalStateException("Unable to read Lisp Feature status", e);
+        }
+    }
+}