From 9c6ac1db63e54e753ebdc2aa3fc73c68ef2a2247 Mon Sep 17 00:00:00 2001
From: Michal Cmarada <mcmarada@cisco.com>
Date: Fri, 3 May 2019 11:29:04 +0200
Subject: Implement callbacks and registry for stats

Change-Id: I9e562482195fcd5f54634cfff29df4358b78ed28
Signed-off-by: Michal Cmarada <mcmarada@cisco.com>
---
 .../io/fd/jvpp/stats/JVppStatsRegistryImpl.java    | 96 ++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 java/jvpp-stats/io/fd/jvpp/stats/JVppStatsRegistryImpl.java

(limited to 'java/jvpp-stats/io/fd/jvpp/stats/JVppStatsRegistryImpl.java')

diff --git a/java/jvpp-stats/io/fd/jvpp/stats/JVppStatsRegistryImpl.java b/java/jvpp-stats/io/fd/jvpp/stats/JVppStatsRegistryImpl.java
new file mode 100644
index 0000000..a94a77f
--- /dev/null
+++ b/java/jvpp-stats/io/fd/jvpp/stats/JVppStatsRegistryImpl.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2019 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.jvpp.stats;
+
+import io.fd.jvpp.JVpp;
+import io.fd.jvpp.JVppRegistry;
+import io.fd.jvpp.VppInvocationException;
+import io.fd.jvpp.callback.JVppCallback;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import static java.util.Objects.requireNonNull;
+
+/**
+ * Stats implementation of JVppRegistry.
+ */
+public final class JVppStatsRegistryImpl implements JVppRegistry {
+
+    private final VppStatsJNIConnection connection;
+    // Unguarded concurrent map, no race conditions expected on top of that
+    private final Map<String, JVppCallback> pluginRegistry;
+
+    public JVppStatsRegistryImpl(final String clientName) throws IOException {
+        connection = new VppStatsJNIConnection(clientName);
+        connection.connect();
+        pluginRegistry = new ConcurrentHashMap<>();
+    }
+
+    @Override
+    public VppStatsJNIConnection getConnection() {
+        return connection;
+    }
+
+    @Override
+    public void register(final JVpp jvpp, final JVppCallback callback) {
+        requireNonNull(jvpp, "jvpp should not be null");
+        requireNonNull(callback, "Callback should not be null");
+        final String name = jvpp.getClass().getName();
+        if (pluginRegistry.containsKey(name)) {
+            throw new IllegalArgumentException(
+                    String.format("Callback for plugin %s was already registered", name));
+        }
+        jvpp.init(this, callback, connection.getStatsConnectionInfo().queueAddress,
+                connection.getStatsConnectionInfo().clientIndex);
+        pluginRegistry.put(name, callback);
+    }
+
+    @Override
+    public void unregister(final String name) {
+        requireNonNull(name, "Plugin name should not be null");
+        final JVppCallback previous = pluginRegistry.remove(name);
+        assertPluginWasRegistered(name, previous);
+    }
+
+    @Override
+    public JVppCallback get(final String name) {
+        requireNonNull(name, "Plugin name should not be null");
+        JVppCallback value = pluginRegistry.get(name);
+        assertPluginWasRegistered(name, value);
+        return value;
+    }
+
+    private native int controlPing0() throws VppInvocationException;
+
+    @Override
+    public int controlPing(Class<? extends JVpp> clazz) throws VppInvocationException {
+        return controlPing0();
+    }
+
+    private static void assertPluginWasRegistered(final String name, final JVppCallback value) {
+        if (value == null) {
+            throw new IllegalArgumentException(String.format("Callback for plugin %s is not registered", name));
+        }
+    }
+
+    @Override
+    public void close() throws Exception {
+        connection.close();
+    }
+}
-- 
cgit 1.2.3-korg