HC-286: Reader/Initializer for iOAM module

Change-Id: I51d9b99d15b0027178f114254d85bacae813ee6d
Signed-off-by: Sagar Srivastav <sagsriva@cisco.com>

4 files changed, 200 insertions, 3 deletions

diff --git a/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/VppIoamModule.java b/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/VppIoamModule.java
index bf5df6389..a378a0669 100755
--- a/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/VppIoamModule.java
+++ b/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/VppIoamModule.java
@@ -17,12 +17,14 @@ package io.fd.hc2vpp.vppioam.impl;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.inject.AbstractModule;
+import com.google.inject.Provider;
 import com.google.inject.Singleton;
 import com.google.inject.multibindings.Multibinder;
-import com.google.inject.Provider;
 import io.fd.hc2vpp.vppioam.impl.config.VppIoamWriterFactory;
-import io.fd.honeycomb.translate.write.WriterFactory;
+import io.fd.hc2vpp.vppioam.impl.oper.VppIoamReaderFactory;
 import io.fd.hc2vpp.vppioam.impl.util.JVppIoamProvider;
+import io.fd.honeycomb.translate.read.ReaderFactory;
+import io.fd.honeycomb.translate.write.WriterFactory;
 import io.fd.vpp.jvpp.ioamtrace.future.FutureJVppIoamtrace;
 import io.fd.vpp.jvpp.ioamtrace.future.FutureJVppIoamtraceFacade;
 import org.slf4j.Logger;
@@ -54,6 +56,7 @@ public final class VppIoamModule extends AbstractModule {
 
         // Below are classes picked up by HC framework
         Multibinder.newSetBinder(binder(), WriterFactory.class).addBinding().to(VppIoamWriterFactory.class);
+        Multibinder.newSetBinder(binder(), ReaderFactory.class).addBinding().to(VppIoamReaderFactory.class);
 
         LOG.debug("Module iOAM successfully configured");
     }
diff --git a/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/oper/TraceProfileReaderCustomizer.java b/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/oper/TraceProfileReaderCustomizer.java
new file mode 100644
index 000000000..d378385ef
--- /dev/null
+++ b/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/oper/TraceProfileReaderCustomizer.java
@@ -0,0 +1,140 @@
+/*
+ * 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.vppioam.impl.oper;
+
+import com.google.common.collect.Lists;
+import io.fd.hc2vpp.common.translate.util.JvppReplyConsumer;
+import io.fd.hc2vpp.vppioam.impl.util.FutureJVppIoamCustomizer;
+import io.fd.honeycomb.translate.read.ReadContext;
+import io.fd.honeycomb.translate.read.ReadFailedException;
+import io.fd.honeycomb.translate.spi.read.Initialized;
+import io.fd.honeycomb.translate.spi.read.InitializingListReaderCustomizer;
+import io.fd.vpp.jvpp.ioamtrace.dto.TraceProfileShowConfig;
+import io.fd.vpp.jvpp.ioamtrace.dto.TraceProfileShowConfigReply;
+import io.fd.vpp.jvpp.ioamtrace.future.FutureJVppIoamtrace;
+import java.util.List;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.ioam.sb.trace.rev160512.IoamTraceConfigBuilder;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.ioam.sb.trace.rev160512.ioam.trace.config.TraceConfig;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.ioam.sb.trace.rev160512.ioam.trace.config.TraceConfigBuilder;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.ioam.sb.trace.rev160512.ioam.trace.config.TraceConfigKey;
+import org.opendaylight.yangtools.concepts.Builder;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class TraceProfileReaderCustomizer extends FutureJVppIoamCustomizer
+        implements InitializingListReaderCustomizer<TraceConfig, TraceConfigKey, TraceConfigBuilder>, JvppReplyConsumer{
+
+    private static final Logger LOG = LoggerFactory.getLogger(TraceProfileReaderCustomizer.class);
+
+    public TraceProfileReaderCustomizer(@Nonnull FutureJVppIoamtrace futureJVppIoam) {
+        super(futureJVppIoam);
+    }
+
+    /**
+     * Creates new builder that will be used to build read value.
+     *
+     * @param id
+     */
+    @Nonnull
+    @Override
+    public TraceConfigBuilder getBuilder(@Nonnull InstanceIdentifier<TraceConfig> id) {
+        return new TraceConfigBuilder();
+    }
+
+    /**
+     * Transform Operational data into Config data.
+     *
+     * @param id        InstanceIdentifier of operational data being initialized
+     * @param readValue Operational data being initialized(converted into config)
+     * @param ctx       Standard read context to assist during initialization e.g. caching data between customizers
+     * @return Initialized, config data and its identifier
+     */
+    @Nonnull
+    @Override
+    public Initialized<? extends DataObject> init(@Nonnull InstanceIdentifier<TraceConfig> id, @Nonnull TraceConfig readValue, @Nonnull ReadContext ctx) {
+        return Initialized.create(id,new TraceConfigBuilder(readValue).build());
+    }
+
+    /**
+     * Adds current data (identified by id) to the provided builder.
+     *
+     * @param id      id of current data object
+     * @param builder builder for creating read value
+     * @param ctx     context for current read
+     * @throws ReadFailedException if read was unsuccessful
+     */
+    @Override
+    public void readCurrentAttributes(@Nonnull InstanceIdentifier<TraceConfig> id, @Nonnull TraceConfigBuilder builder,
+                                      @Nonnull ReadContext ctx) throws ReadFailedException {
+
+        // Only one trace config is configured on the VPP side as of now.
+        // name of trace config, which is key for the list, is not used in the VPP implementation.
+
+        LOG.debug("reading attribute for trace config {}",id);
+        final TraceProfileShowConfig request = new TraceProfileShowConfig();
+        TraceProfileShowConfigReply reply = getReplyForRead(getFutureJVppIoam().traceProfileShowConfig(request)
+                .toCompletableFuture(),id);
+        if(reply == null) {
+            LOG.debug("{} returned null as reply from vpp",id);
+            return;
+        }
+
+        if(reply.traceType == 0){
+            LOG.debug("{} no configured trace config found",id);
+            return;
+        }
+        builder.setNodeId((long) reply.nodeId);
+        builder.setTraceAppData((long) reply.appData);
+        builder.setTraceNumElt((short) reply.numElts);
+        builder.setTraceTsp(TraceConfig.TraceTsp.forValue(reply.traceTsp));
+        builder.setTraceType((short) reply.traceType);
+
+        LOG.debug("Item {} successfully read: {}",id,builder.build());
+    }
+
+    /**
+     * Merge read data into provided parent builder.
+     *
+     * @param parentBuilder
+     * @param readValue
+     */
+    @Override
+    public void merge(@Nonnull Builder<? extends DataObject> parentBuilder, @Nonnull TraceConfig readValue) {
+        IoamTraceConfigBuilder builder = (IoamTraceConfigBuilder) parentBuilder;
+        List<TraceConfig> traceConfigs = builder.getTraceConfig();
+        traceConfigs.add(readValue);
+        builder.setTraceConfig(traceConfigs);
+    }
+
+    @Nonnull
+    @Override
+    public List<TraceConfigKey> getAllIds(@Nonnull final InstanceIdentifier<TraceConfig> instanceIdentifier,
+                                          @Nonnull final ReadContext readContext) throws ReadFailedException {
+
+        // Only one trace config is configured on the VPP side as of now.
+        // name of trace config, which is key for the list, is not used in the VPP implementation.
+
+        return Lists.newArrayList(new TraceConfigKey("trace config"));
+    }
+
+    @Override
+    public void merge(@Nonnull final Builder<? extends DataObject> builder, @Nonnull final List<TraceConfig> list) {
+        ((IoamTraceConfigBuilder) builder).setTraceConfig(list);
+    }
+}
diff --git a/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/oper/VppIoamReaderFactory.java b/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/oper/VppIoamReaderFactory.java
new file mode 100644
index 000000000..8c34f54e5
--- /dev/null
+++ b/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/oper/VppIoamReaderFactory.java
@@ -0,0 +1,54 @@
+/*
+ * 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.vppioam.impl.oper;
+
+import io.fd.honeycomb.translate.impl.read.GenericInitListReader;
+import io.fd.honeycomb.translate.read.ReaderFactory;
+import io.fd.honeycomb.translate.read.registry.ModifiableReaderRegistryBuilder;
+import io.fd.vpp.jvpp.ioamtrace.future.FutureJVppIoamtrace;
+import javax.annotation.Nonnull;
+import javax.inject.Inject;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.ioam.sb.trace.rev160512.IoamTraceConfig;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.ioam.sb.trace.rev160512.IoamTraceConfigBuilder;
+import org.opendaylight.yang.gen.v1.urn.cisco.params.xml.ns.yang.ioam.sb.trace.rev160512.ioam.trace.config.TraceConfig;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+public class VppIoamReaderFactory implements ReaderFactory {
+
+    FutureJVppIoamtrace jVppIoamtrace;
+
+    @Inject
+    VppIoamReaderFactory(FutureJVppIoamtrace jVppIoamtrace){
+        this.jVppIoamtrace = jVppIoamtrace;
+    }
+
+    /**
+     * Initialize 1 or more readers and add them to provided registry.
+     *
+     * @param registry
+     */
+    @Override
+    public void init(@Nonnull ModifiableReaderRegistryBuilder registry) {
+
+        //IoamTraceConfig (Structural)
+        final InstanceIdentifier<IoamTraceConfig> ioamTraceConfigId = InstanceIdentifier.create(IoamTraceConfig.class);
+        registry.addStructuralReader(ioamTraceConfigId, IoamTraceConfigBuilder.class);
+
+        //TraceConfig
+        final InstanceIdentifier<TraceConfig> traceConfigId = ioamTraceConfigId.child(TraceConfig.class);
+        registry.add(new GenericInitListReader<>(traceConfigId,new TraceProfileReaderCustomizer(jVppIoamtrace)));
+    }
+}
diff --git a/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/util/JVppIoamProvider.java b/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/util/JVppIoamProvider.java
index a34715ca6..0b5e3e79e 100755
--- a/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/util/JVppIoamProvider.java
+++ b/ioam/impl/src/main/java/io/fd/hc2vpp/vppioam/impl/util/JVppIoamProvider.java
@@ -50,7 +50,7 @@ public final class JVppIoamProvider extends ProviderTrait<FutureJVppIoamtraceFac
                 }
             });
 
-            LOG.debug("Successfully loaded jvpp-ioam plugin");
+            LOG.info("Successfully loaded jvpp-ioam plugin");
             return new FutureJVppIoamtraceFacade(registry, jVppIoamTr);
         } catch (IOException e) {
             throw new IllegalStateException("Unable to open VPP management connection", e);