OAM NF Adopter SNMP Manager

[oam/nf-oam-adopter.git] / ves-nf-oam-adopter / ves-nf-oam-adopter-snmp-manager / src / main / java / org / o / ran / oam / nf / oam / adopter / snmp / manager / mapper / SnmpMapperImpl.java

diff --git a/ves-nf-oam-adopter/ves-nf-oam-adopter-snmp-manager/src/main/java/org/o/ran/oam/nf/oam/adopter/snmp/manager/mapper/SnmpMapperImpl.java b/ves-nf-oam-adopter/ves-nf-oam-adopter-snmp-manager/src/main/java/org/o/ran/oam/nf/oam/adopter/snmp/manager/mapper/SnmpMapperImpl.java
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+/*
+ *  ============LICENSE_START=======================================================
+ *  O-RAN-SC
+ *  ================================================================================
+ *  Copyright © 2021 AT&T Intellectual Property. All rights reserved.
+ *  ================================================================================
+ *  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.
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.o.ran.oam.nf.oam.adopter.snmp.manager.mapper;
+
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+import io.reactivex.rxjava3.core.Maybe;
+import java.util.Map;
+import java.util.Optional;
+import java.util.stream.Collectors;
+import org.o.ran.oam.nf.oam.adopter.api.CommonEventFormat302ONAP;
+import org.o.ran.oam.nf.oam.adopter.api.Event;
+import org.o.ran.oam.nf.oam.adopter.snmp.manager.SnmpMappingConfigurationProvider;
+import org.o.ran.oam.nf.oam.adopter.snmp.manager.pojos.TrapsMappingConfiguration;
+import org.o.ran.oam.nf.oam.adopter.snmp.manager.pojos.VesMappingConfiguration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.snmp4j.PDU;
+import org.snmp4j.smi.OID;
+import org.snmp4j.smi.UdpAddress;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class SnmpMapperImpl implements SnmpMapper {
+    private static final Logger LOG = LoggerFactory.getLogger(SnmpMapperImpl.class);
+    public static final String DEFAULT = "default";
+    public static final OID SNMP_TRAP_OID = new OID("1.3.6.1.6.3.1.1.4.1.0");
+    private final SnmpMappingConfigurationProvider snmpMappingConfigurationProvider;
+
+    @Autowired
+    public SnmpMapperImpl(final SnmpMappingConfigurationProvider snmpMappingConfigurationProvider) {
+        this.snmpMappingConfigurationProvider = snmpMappingConfigurationProvider;
+    }
+
+    @Override
+    @SuppressFBWarnings("REC_CATCH_EXCEPTION")
+    public Maybe<CommonEventFormat302ONAP> toEvent(final UdpAddress peerAddress, final String timeZone, final PDU pdu) {
+        try {
+            final int eventType = pdu.getType();
+            if (pdu.getType() != PDU.NOTIFICATION) {
+                LOG.warn("SNMP Event type {} not supported, ignoring event.", eventType);
+                return Maybe.empty();
+            }
+            LOG.info("Starting Mapping of SNMP Event type {}.", eventType);
+            LOG.trace("Pdu received {}.", pdu);
+            final Event event = new Event();
+            final String trapOidVariable = pdu.getVariable(SNMP_TRAP_OID).toString();
+            final VesMappingConfiguration vesMappingConfig =
+                    snmpMappingConfigurationProvider.getVesMappingConfiguration();
+            final Map<String, TrapsMappingConfiguration> trapsDescriptions = vesMappingConfig.getTraps().stream()
+                    .collect(Collectors.toMap(TrapsMappingConfiguration::getOid, trapsDescription -> trapsDescription));
+            final TrapsMappingConfiguration trapsDescription =
+                    Optional.ofNullable(trapsDescriptions.get(trapOidVariable)).orElse(trapsDescriptions.get(DEFAULT));
+            event.setCommonEventHeader(CommonEventHeaderHandler.toCommonEventHeader(peerAddress, vesMappingConfig,
+                    trapsDescription, pdu, timeZone));
+            event.setFaultFields(FaultFieldsHandler.toFaultFields(trapsDescription, pdu));
+            final CommonEventFormat302ONAP eventFormat = new CommonEventFormat302ONAP();
+            eventFormat.setEvent(event);
+            eventFormat.setEventList(null);
+            LOG.info("Mapping of SNMP Event type {} finished.", eventType);
+            return Maybe.just(eventFormat);
+        } catch (final Exception e) {
+            return Maybe.error(e);
+        }
+    }
+}