2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2021 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 * ============LICENSE_END=========================================================
20 package org.o.ran.oam.nf.oam.adopter.snmp.manager;
22 import static java.util.Objects.requireNonNull;
24 import com.fasterxml.jackson.databind.ObjectMapper;
25 import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
26 import java.io.IOException;
27 import java.io.StringWriter;
29 import java.nio.file.Paths;
30 import javax.annotation.PostConstruct;
31 import org.apache.commons.configuration2.YAMLConfiguration;
32 import org.apache.commons.configuration2.builder.ConfigurationBuilderEvent;
33 import org.apache.commons.configuration2.builder.ReloadingFileBasedConfigurationBuilder;
34 import org.apache.commons.configuration2.builder.fluent.Parameters;
35 import org.apache.commons.configuration2.event.EventListener;
36 import org.apache.commons.configuration2.ex.ConfigurationException;
37 import org.o.ran.oam.nf.oam.adopter.snmp.manager.pojos.VesMappingConfiguration;
38 import org.slf4j.Logger;
39 import org.slf4j.LoggerFactory;
40 import org.springframework.beans.factory.annotation.Value;
41 import org.springframework.stereotype.Service;
44 * Reads and listens for changes on snmp mapping configuration.
47 public class SnmpMappingConfigurationProvider {
48 private static final Logger LOG = LoggerFactory.getLogger(SnmpMappingConfigurationProvider.class);
50 private static final ObjectMapper YAML_READER = new ObjectMapper(new YAMLFactory());
51 @Value("${snmp-manager.mapping-config-path:#{null}}")
52 private String mappingFilePath;
53 private ReloadingFileBasedConfigurationBuilder<YAMLConfiguration> builder;
57 * @throws IOException on error
60 public void init() throws IOException, ConfigurationException {
61 requireNonNull(mappingFilePath);
62 final URI filePath = Paths.get(mappingFilePath).toUri();
63 builder = new ReloadingFileBasedConfigurationBuilder<>(YAMLConfiguration.class)
64 .configure(new Parameters().hierarchical().setURL(filePath.toURL()));
65 builder.addEventListener(ConfigurationBuilderEvent.CONFIGURATION_REQUEST, (EventListener) event -> {
66 builder.getReloadingController().checkForReloading(null);
67 LOG.info("Reloading {}", filePath);
69 //Test initial configuration
70 builder.getConfiguration();
74 * Reads VesMappingConfiguration from yaml file.
76 * @return Ves Mapping Configuration
78 public VesMappingConfiguration getVesMappingConfiguration() throws ConfigurationException, IOException {
79 final YAMLConfiguration configuration = builder.getConfiguration();
80 final StringWriter output = new StringWriter();
81 configuration.write(output);
82 return YAML_READER.readValue(output.toString(), VesMappingConfiguration.class);