ONOS-5917 SNMP Alarm Provider

Change-Id: I9eb39021584f3b1a5baed9dfa638569818901197
diff --git a/protocols/snmp/api/src/main/java/org/onosproject/snmp/SnmpDeviceConfig.java b/protocols/snmp/api/src/main/java/org/onosproject/snmp/SnmpDeviceConfig.java
new file mode 100644
index 0000000..b39180a
--- /dev/null
+++ b/protocols/snmp/api/src/main/java/org/onosproject/snmp/SnmpDeviceConfig.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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 org.onosproject.snmp;
+
+import com.google.common.annotations.Beta;
+import org.apache.commons.lang3.tuple.Pair;
+import org.onlab.packet.IpAddress;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.config.Config;
+
+/**
+ * Configuration to push devices to the SNMP provider.
+ */
+@Beta
+public class SnmpDeviceConfig extends Config<DeviceId> {
+
+    private static final String PROTOCOL = "protocol";
+    private static final String NOTIFICATION_PROTOCOL = "notificationProtocol";
+    private static final String IP = "ip";
+    private static final String PORT = "port";
+    private static final int DEFAULT_PORT = 161;
+    private static final String NOTIFICATION_PORT = "notificationPort";
+    private static final String USERNAME = "username";
+    private static final String PASSWORD = "password";
+
+    @Override
+    public boolean isValid() {
+        return hasOnlyFields(IP, PORT, USERNAME, PASSWORD) &&
+                ip() != null;
+    }
+
+    /**
+     * Gets the protocol of the SNMP device.
+     *
+     * @return protocol
+     */
+    public String protocol() {
+        return get(PROTOCOL, "udp");
+    }
+
+    /**
+     * Gets the notification protocol of the SNMP device.
+     *
+     * @return notification protocol
+     */
+    public String notificationProtocol() {
+        return get(NOTIFICATION_PROTOCOL, "udp");
+    }
+
+    /**
+     * Gets the Ip of the SNMP device.
+     *
+     * @return ip
+     */
+    public IpAddress ip() {
+        return IpAddress.valueOf(get(IP, extractIpPort().getKey()));
+    }
+
+    /**
+     * Gets the port of the SNMP device.
+     *
+     * @return port
+     */
+    public int port() {
+        return get(PORT, extractIpPort().getValue());
+    }
+
+    /**
+     * Gets the notification port of the SNMP device.
+     *
+     * @return notification port
+     */
+    public int notificationPort() {
+        return get(NOTIFICATION_PORT, 0);
+    }
+
+    /**
+     * Gets the username of the SNMP device.
+     *
+     * @return username
+     */
+    public String username() {
+        return get(USERNAME, "");
+    }
+
+    /**
+     * Gets the password of the SNMP device.
+     *
+     * @return password
+     */
+    public String password() {
+        return get(PASSWORD, "");
+    }
+
+
+    private Pair<String, Integer> extractIpPort() {
+        String info = subject.uri().getSchemeSpecificPart();
+        int portSeparator = info.lastIndexOf(':');
+        if (portSeparator == -1) {
+            return Pair.of(info, DEFAULT_PORT);
+        }
+
+        String ip = info.substring(0, portSeparator);
+        int port = Integer.parseInt(info.substring(portSeparator + 1));
+        return Pair.of(ip, port);
+    }
+}