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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 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.onap.aai.schemaservice.edges;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.stream.JsonReader;
import org.onap.aai.schemaservice.nodeschema.SchemaVersion;
import org.onap.aai.schemaservice.nodeschema.SchemaVersions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import javax.annotation.PostConstruct;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
@Service
public class EdgeService {
private static final EELFLogger LOGGER = EELFManager.getInstance().getLogger(EdgeService.class);
private static final String FILESEP = System.getProperty("file.separator");
private SchemaVersions schemaVersions;
private String edgesLocation;
private Map<String, EdgeRules> rulesMap;
@Autowired
public EdgeService(SchemaVersions schemaVersions,
@Value("${schema.edges.location}") String edgesLocation){
this.schemaVersions = schemaVersions;
this.edgesLocation = edgesLocation;
this.rulesMap = new HashMap<>();
}
@PostConstruct
public void initialize() throws IOException {
Gson gson = new GsonBuilder().setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_DASHES).create();
for (SchemaVersion schemaVersion : schemaVersions.getVersions()) {
String edgeRuleVersionPath = edgesLocation + FILESEP + schemaVersion.toString();
LOGGER.debug("For the version {} looking for edge rules in folder {}", schemaVersion, edgeRuleVersionPath);
try (Stream<Path> pathStream = Files.walk(Paths.get(edgeRuleVersionPath))){
List<Path> jsonFiles = pathStream
.filter((path) -> path.toString().endsWith(".json"))
.collect(Collectors.toList());
if(jsonFiles.isEmpty()){
LOGGER.error("Unable to find any edge rules json files in folder {}", edgeRuleVersionPath);
} else {
LOGGER.trace("Found the following edge rules {}", jsonFiles);
}
List<EdgeRule> rules = new ArrayList<>();
for(Path path : jsonFiles){
File edgeRuleFile = path.toFile();
try (JsonReader jsonReader = new JsonReader(new FileReader(edgeRuleFile))){
EdgeRules edgeRules = gson.fromJson(jsonReader, EdgeRules.class);
rules.addAll(edgeRules.getRules());
}
}
rulesMap.put(schemaVersion.toString(), new EdgeRules(rules));
}
}
}
public Optional<EdgeRules> findRules(String version){
return Optional.ofNullable(rulesMap.get(version));
}
}
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