1 files changed, 202 insertions, 0 deletions
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/hc2vpp/v3po/read/cache/InterfaceCacheDumpManagerImpl.java b/v3po/v3po2vpp/src/main/java/io/fd/hc2vpp/v3po/read/cache/InterfaceCacheDumpManagerImpl.java
new file mode 100644
index 000000000..0aee8e459
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/hc2vpp/v3po/read/cache/InterfaceCacheDumpManagerImpl.java
@@ -0,0 +1,202 @@
+/*
+ * 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.v3po.read.cache;
+
+import static io.fd.hc2vpp.common.translate.util.JvppReplyConsumer.INSTANCE;
+import static java.util.stream.Collectors.toMap;
+
+import io.fd.hc2vpp.common.translate.util.ByteDataTranslator;
+import io.fd.hc2vpp.common.translate.util.NamingContext;
+import io.fd.honeycomb.translate.ModificationCache;
+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.EntityDumpExecutor;
+import io.fd.honeycomb.translate.util.read.cache.StaticCacheKeyFactory;
+import io.fd.jvpp.core.dto.SwInterfaceDetails;
+import io.fd.jvpp.core.dto.SwInterfaceDetailsReplyDump;
+import io.fd.jvpp.core.dto.SwInterfaceDump;
+import io.fd.jvpp.core.future.FutureJVppCore;
+import io.fd.jvpp.core.types.InterfaceIndex;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.stream.Stream;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Manager for dump data of interfaces/sub-interfaces
+ */
+final class InterfaceCacheDumpManagerImpl implements InterfaceCacheDumpManager {
+
+    private static final Logger LOG = LoggerFactory.getLogger(InterfaceCacheDumpManagerImpl.class);
+
+    // byNameIndex must be cached, not held as reference here, to have it destroyed with cache after transaction
+    static final String BY_NAME_INDEX_KEY = InterfaceCacheDumpManagerImpl.class.getName() + "_byNameIndex";
+    private NamingContext namingContext;
+    private final DumpCacheManager<SwInterfaceDetailsReplyDump, String> specificDumpManager;
+    private final DumpCacheManager<SwInterfaceDetailsReplyDump, Void> fullDumpManager;
+
+    InterfaceCacheDumpManagerImpl(@Nonnull final FutureJVppCore jvpp,
+                                  @Nonnull final NamingContext namingContext) {
+        this.namingContext = namingContext;
+        specificDumpManager = specificInterfaceDumpManager(jvpp);
+        fullDumpManager = fullInterfaceDumpManager(jvpp,
+                new StaticCacheKeyFactory(InterfaceCacheDumpManagerImpl.class.getName() + "_dump", SwInterfaceDetailsReplyDump.class));
+    }
+
+    @Override
+    @Nonnull
+    public synchronized Stream<SwInterfaceDetails> getInterfaces(@Nonnull final InstanceIdentifier<?> identifier,
+                                                                 @Nonnull final ReadContext ctx)
+            throws ReadFailedException {
+        LOG.debug("Reading all interfaces[{}]", identifier);
+        return initMapAndGet(identifier, ctx).entrySet().stream().map(Map.Entry::getValue);
+    }
+
+    @Override
+    @Nullable
+    public synchronized SwInterfaceDetails getInterfaceDetail(@Nonnull final InstanceIdentifier<?> identifier,
+                                                              @Nonnull final ReadContext ctx,
+                                                              @Nonnull final String interfaceName)
+            throws ReadFailedException {
+        final Map<String, SwInterfaceDetails> interfaceIndex = getMap(ctx);
+
+        // does not attempt to cover cases with concurrent updates, as tx should be atomic
+        if (interfaceIndex != null) {
+            // tries to find interface in map
+            return interfaceIndex.get(interfaceName);
+        } else {
+            // if map is not present, use specific dump(it will be cached standard way, under key constructed from IID)
+            return dumpSpecificDetail(identifier, ctx, interfaceName);
+        }
+    }
+
+    private SwInterfaceDetails dumpSpecificDetail(@Nonnull final InstanceIdentifier<?> identifier,
+                                                  @Nonnull final ReadContext ctx,
+                                                  @Nonnull final String interfaceName)
+            throws ReadFailedException {
+        LOG.debug("Interface {} not present in cached data, performing specific dump[{}]", interfaceName,
+                identifier);
+        final SwInterfaceDetailsReplyDump reply =
+                specificDumpManager.getDump(identifier, ctx.getModificationCache(), interfaceName)
+                        .orElse(new SwInterfaceDetailsReplyDump());
+
+        if (reply.swInterfaceDetails.isEmpty()) {
+            return null;
+        }
+
+        return reply.swInterfaceDetails.get(0);
+    }
+
+    private Map<String, SwInterfaceDetails> initMapAndGet(final InstanceIdentifier<?> identifier, final ReadContext ctx)
+            throws ReadFailedException {
+
+        final ModificationCache cache = ctx.getModificationCache();
+        if (!cache.containsKey(BY_NAME_INDEX_KEY)) {
+            LOG.debug("Performing dump[{}]", identifier);
+            final SwInterfaceDetailsReplyDump dump =
+                    fullDumpManager.getDump(identifier, cache)
+                            .orElse(new SwInterfaceDetailsReplyDump());
+
+            // naming context initialization must be done here, as it is uses getName in next step, therefore it would
+            // create artificial mapping for every interface, because this happens before interface dump is processed
+            dump.swInterfaceDetails.forEach((elt) -> {
+                // Store interface name from VPP in context if not yet present
+                if (!namingContext.containsName(elt.swIfIndex, ctx.getMappingContext())) {
+                    namingContext.addName(elt.swIfIndex, ByteDataTranslator.INSTANCE.toString(elt.interfaceName),
+                            ctx.getMappingContext());
+                }
+                LOG.trace("Interface with name: {}, VPP name: {} and index: {} found in VPP",
+                        getInterfaceName(ctx, elt),
+                        elt.interfaceName,
+                        elt.swIfIndex);
+            });
+
+            final Map<String, SwInterfaceDetails> freshIndex = dump.swInterfaceDetails.stream()
+                    .collect(toMap(detail -> getInterfaceName(ctx, detail),
+                            detail -> detail));
+            putMap(freshIndex, ctx);
+        }
+
+        return getMap(ctx);
+    }
+
+    private String getInterfaceName(final ReadContext ctx, final SwInterfaceDetails elt) {
+        return namingContext.getName(elt.swIfIndex, ctx.getMappingContext());
+    }
+
+    private static Map<String, SwInterfaceDetails> getMap(final ReadContext ctx) {
+        return (Map<String, SwInterfaceDetails>) ctx.getModificationCache().get(BY_NAME_INDEX_KEY);
+    }
+
+    private static void putMap(final Map<String, SwInterfaceDetails> map, final ReadContext ctx) {
+        ctx.getModificationCache().put(BY_NAME_INDEX_KEY, map);
+    }
+
+
+    private static DumpCacheManager<SwInterfaceDetailsReplyDump, Void> fullInterfaceDumpManager(
+            final FutureJVppCore jvpp,
+            final StaticCacheKeyFactory cacheKeyFactory) {
+        return new DumpCacheManager.DumpCacheManagerBuilder<SwInterfaceDetailsReplyDump, Void>()
+                .withExecutor(fullInterfaceDumpExecutor(jvpp))
+                .withCacheKeyFactory(cacheKeyFactory)
+                .acceptOnly(SwInterfaceDetailsReplyDump.class)
+                .build();
+    }
+
+    private static DumpCacheManager<SwInterfaceDetailsReplyDump, String> specificInterfaceDumpManager(
+            final FutureJVppCore jvpp) {
+        return new DumpCacheManager.DumpCacheManagerBuilder<SwInterfaceDetailsReplyDump, String>()
+                .withExecutor(specificInterfaceDumpExecutor(jvpp))
+                .acceptOnly(SwInterfaceDetailsReplyDump.class)
+                .build();
+    }
+
+    private static EntityDumpExecutor<SwInterfaceDetailsReplyDump, Void> fullInterfaceDumpExecutor(
+            final FutureJVppCore api) {
+        return (identifier, params) -> {
+            final SwInterfaceDump request = new SwInterfaceDump();
+            request.swIfIndex = new InterfaceIndex();
+            request.swIfIndex.interfaceindex = ~0;
+            request.nameFilter = "".getBytes();
+            request.nameFilterValid = 0;
+
+            final CompletableFuture<SwInterfaceDetailsReplyDump>
+                    swInterfaceDetailsReplyDumpCompletableFuture = api.swInterfaceDump(request).toCompletableFuture();
+            return INSTANCE.getReplyForRead(swInterfaceDetailsReplyDumpCompletableFuture, identifier);
+        };
+    }
+
+    private static EntityDumpExecutor<SwInterfaceDetailsReplyDump, String> specificInterfaceDumpExecutor(
+            final FutureJVppCore api) {
+        return (identifier, ifaceName) -> {
+            final SwInterfaceDump request = new SwInterfaceDump();
+            request.swIfIndex = new InterfaceIndex();
+            request.swIfIndex.interfaceindex =~0;
+            request.nameFilter = ifaceName.getBytes();
+            request.nameFilterValid = 1;
+
+            final CompletableFuture<SwInterfaceDetailsReplyDump>
+                    swInterfaceDetailsReplyDumpCompletableFuture = api.swInterfaceDump(request).toCompletableFuture();
+            return INSTANCE.getReplyForRead(swInterfaceDetailsReplyDumpCompletableFuture, identifier);
+        };
+    }
+}