1 files changed, 61 insertions, 0 deletions
diff --git a/nsh/impl/src/main/java/io/fd/honeycomb/vppnsh/impl/util/JVppNshProvider.java b/nsh/impl/src/main/java/io/fd/honeycomb/vppnsh/impl/util/JVppNshProvider.java
new file mode 100755
index 000000000..130b499a6
--- /dev/null
+++ b/nsh/impl/src/main/java/io/fd/honeycomb/vppnsh/impl/util/JVppNshProvider.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2016 Intel 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.vppnsh.impl.util;
+
+import com.google.inject.Inject;
+import io.fd.honeycomb.infra.distro.ProviderTrait;
+import java.io.IOException;
+import org.openvpp.jvpp.JVppRegistry;
+import org.openvpp.jvpp.nsh.future.FutureJVppNsh;
+import org.openvpp.jvpp.nsh.future.FutureJVppNshFacade;
+import org.openvpp.jvpp.nsh.JVppNshImpl;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Provides future API for jvpp-nsh plugin. Must be a singleton due to shutdown hook usage.
+ * Registers shutdown hook to free plugin's resources on shutdown.
+ */
+public final class JVppNshProvider extends ProviderTrait<FutureJVppNsh> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(JVppNshProvider.class);
+
+    @Inject
+    private JVppRegistry registry;
+
+    @Override
+    protected FutureJVppNshFacade create() {
+        try {
+            final JVppNshImpl jVppNsh = new JVppNshImpl();
+            // Free jvpp-nsh plugin's resources on shutdown
+            Runtime.getRuntime().addShutdownHook(new Thread() {
+                @Override
+                public void run() {
+                    LOG.info("Unloading jvpp-nsh plugin");
+                    jVppNsh.close();
+                    LOG.info("Successfully unloaded jvpp-nsh plugin");
+                }
+            });
+
+            LOG.info("Successfully loaded jvpp-nsh plugin");
+            return new FutureJVppNshFacade(registry, jVppNsh);
+        } catch (IOException e) {
+            throw new IllegalStateException("Unable to open VPP management connection", e);
+        }
+    }
+}
+