1 files changed, 72 insertions, 0 deletions
diff --git a/vpp-common/vpp-common-integration/src/main/java/io/fd/honeycomb/vpp/common/integration/JVppRegistryProvider.java b/vpp-common/vpp-common-integration/src/main/java/io/fd/honeycomb/vpp/common/integration/JVppRegistryProvider.java
new file mode 100644
index 000000000..fa1d47480
--- /dev/null
+++ b/vpp-common/vpp-common-integration/src/main/java/io/fd/honeycomb/vpp/common/integration/JVppRegistryProvider.java
@@ -0,0 +1,72 @@
+/*
+ * 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.honeycomb.vpp.common.integration;
+
+import com.google.inject.Inject;
+import io.fd.honeycomb.infra.distro.ProviderTrait;
+import io.fd.honeycomb.translate.vpp.util.VppStatusListener;
+import java.io.IOException;
+import io.fd.vpp.jvpp.JVppRegistry;
+import io.fd.vpp.jvpp.JVppRegistryImpl;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Provides JVppRegistry. Must be a singleton due to shutdown hook usage. Registers shutdown hook to disconnect from
+ * VPP.
+ */
+public final class JVppRegistryProvider extends ProviderTrait<JVppRegistry> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(JVppRegistryProvider.class);
+
+    @Inject
+    private VppConfigAttributes config;
+    @Inject
+    private VppStatusListener vppStatus;
+
+    @Override
+    protected JVppRegistryImpl create() {
+        try {
+            final JVppRegistryImpl registry = new JVppRegistryImpl(config.jvppConnectionName);
+
+            // Closing JVpp connection with shutdown hook to erase the connection from VPP so HC will be able
+            // to connect next time. If JVM is force closed, this will not be executed and VPP connection
+            // with name from config will stay open and prevent next startup of HC to success
+            Runtime.getRuntime().addShutdownHook(new Thread() {
+                @Override
+                public void run() {
+                    LOG.info("Disconnecting from VPP");
+                    if (vppStatus.isDown()) {
+                        LOG.info("VPP is down. JVppRegistry cleanup is not needed. Exiting");
+                        return;
+                    }
+                    try {
+                        registry.close();
+                        LOG.info("Successfully disconnected from VPP as {}", config.jvppConnectionName);
+                    } catch (Exception e) {
+                        LOG.warn("Unable to properly close jvpp registry", e);
+                    }
+                }
+            });
+
+            LOG.info("JVpp connection opened successfully as: {}", config.jvppConnectionName);
+            return registry;
+        } catch (IOException e) {
+            throw new IllegalStateException("Unable to open VPP management connection", e);
+        }
+    }
+}