HONEYCOMB-257 - Honeycomb support for in-band OAM (iOAM) path tracing

- Add iOAM module to handle configuration for the iOAM trace VPP plugin
- Add iOAM module test to verify add/delete configurations
- Reader/Initializers for future, dependent on https://gerrit.fd.io/r/3387

Change-Id: I557604a955771c139165aed7cd9e5716abbac3d1
Signed-off-by: Srihari Raghavan <srihari@cisco.com>

1 files changed, 62 insertions, 0 deletions

diff --git a/ioam/impl/src/main/java/io/fd/honeycomb/vppioam/impl/util/JVppIoamProvider.java b/ioam/impl/src/main/java/io/fd/honeycomb/vppioam/impl/util/JVppIoamProvider.java
new file mode 100755
index 000000000..d95266457
--- /dev/null
+++ b/ioam/impl/src/main/java/io/fd/honeycomb/vppioam/impl/util/JVppIoamProvider.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2016 Cisco and 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.honeycomb.vppioam.impl.util;
+
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import io.fd.honeycomb.infra.distro.ProviderTrait;
+import java.io.IOException;
+import io.fd.vpp.jvpp.JVppRegistry;
+import io.fd.vpp.jvpp.ioamtrace.future.FutureJVppIoamtrace;
+import io.fd.vpp.jvpp.ioamtrace.future.FutureJVppIoamtraceFacade;
+import io.fd.vpp.jvpp.ioamtrace.JVppIoamtraceImpl;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Provides future API for jvpp-ioam plugin. Must be a singleton due to shutdown hook usage.
+ * Registers shutdown hook to free plugin's resources on shutdown.
+ */
+public final class JVppIoamProvider extends ProviderTrait<FutureJVppIoamtraceFacade> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(JVppIoamProvider.class);
+
+    @Inject
+    private JVppRegistry registry;
+
+    @Override
+    protected FutureJVppIoamtraceFacade create() {
+        try {
+            final JVppIoamtraceImpl jVppIoamTr = new JVppIoamtraceImpl();
+            // Free jvpp-ioam plugin's resources on shutdown
+            Runtime.getRuntime().addShutdownHook(new Thread() {
+                @Override
+                public void run() {
+                    LOG.info("Unloading jvpp-ioam plugin");
+                    jVppIoamTr.close();
+                    LOG.info("Successfully unloaded jvpp-ioam plugin");
+                }
+            });
+
+            LOG.debug("Successfully loaded jvpp-ioam plugin");
+            return new FutureJVppIoamtraceFacade(registry, jVppIoamTr);
+        } catch (IOException e) {
+            throw new IllegalStateException("Unable to open VPP management connection", e);
+        }
+    }
+}
+