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/*
* Copyright 2017-2020 ZTE Corporation.
*
* 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.onap.holmes.common.dcae.utils;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import org.apache.commons.lang3.StringUtils;
import org.onap.holmes.common.dcae.entity.DcaeConfigurations;
import org.onap.holmes.common.dcae.entity.Rule;
import org.onap.holmes.common.dcae.entity.SecurityInfo;
import org.onap.holmes.common.exception.CorrelationException;
import java.util.Arrays;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set;
import java.util.stream.Stream;
import static org.onap.holmes.common.utils.GsonUtil.getAsString;
public class DcaeConfigurationParser {
private static final String RULE_CONTENT_SPLIT = "\\$\\$\\$";
private static final List<String> OBJECT_ATTRS = Arrays
.asList(new String[]{"streams_subscribes", "streams_publishes", "services_calls", "services_provides"});
public static DcaeConfigurations parse(String jsonStr) throws CorrelationException {
if (StringUtils.isEmpty(jsonStr)) {
throw new CorrelationException(
"Can not resolve configurations from DCAE. The configuration string is empty.");
}
DcaeConfigurations ret = new DcaeConfigurations();
JsonObject jsonObject = null;
try {
jsonObject = JsonParser.parseString(jsonStr).getAsJsonObject();
} catch (Exception e) {
throw new CorrelationException(e.getMessage(), e);
}
fillInRules(ret, jsonObject);
fillInPublishesInfo(ret, jsonObject);
fillInSubscribesInfo(ret, jsonObject);
JsonObject finalJsonObject = jsonObject;
Stream.of(jsonObject.keySet().toArray(new String[0]))
.filter(key -> !OBJECT_ATTRS.contains(key))
.forEach(key -> ret.put(key, finalJsonObject.get(String.valueOf(key)).getAsString()));
return ret;
}
private static void fillInPublishesInfo(DcaeConfigurations ret, JsonObject jsonObject) {
if (jsonObject.has("streams_publishes")) {
JsonObject publishes = jsonObject.get("streams_publishes").getAsJsonObject();
for (Object key : publishes.keySet()) {
ret.addPubSecInfo((String) key,
createSecurityInfo((String) key, publishes.get((String) key).getAsJsonObject()));
}
}
}
private static void fillInSubscribesInfo(DcaeConfigurations ret, JsonObject jsonObject) {
if (jsonObject.has("streams_subscribes")) {
JsonObject subscribes = jsonObject.get("streams_subscribes").getAsJsonObject();
for (Object key : subscribes.keySet()) {
ret.addSubSecInfo((String) key,
createSecurityInfo((String) key, subscribes.get((String) key).getAsJsonObject()));
}
}
}
private static SecurityInfo createSecurityInfo(String key, JsonObject entity) {
SecurityInfo securityInfo = new SecurityInfo();
securityInfo.setType(getAsString(entity, "type"));
securityInfo.setAafPassword(getAsString(entity, "aaf_password"));
securityInfo.setAafUsername(getAsString(entity, "aaf_username"));
securityInfo.setSecureTopic(!key.endsWith("unsecure"));
fillInDmaapInfo(securityInfo, entity.get("dmaap_info").getAsJsonObject());
return securityInfo;
}
private static void fillInDmaapInfo(SecurityInfo securityInfo, JsonObject jsonDmaapInfo) {
SecurityInfo.DmaapInfo dmaapInfo = securityInfo.getDmaapInfo();
dmaapInfo.setLocation(getAsString(jsonDmaapInfo, "location"));
dmaapInfo.setTopicUrl(getAsString(jsonDmaapInfo, "topic_url"));
dmaapInfo.setClientId(getAsString(jsonDmaapInfo, "client_id"));
dmaapInfo.setClientRole(getAsString(jsonDmaapInfo, "client_role"));
dmaapInfo.setType(getAsString(jsonDmaapInfo, "type"));
}
private static void fillInRules(DcaeConfigurations ret, JsonObject jsonObject) {
Set<Entry<String, JsonElement>> entries = jsonObject.entrySet();
for (Entry<String, JsonElement> entry : entries) {
if (entry.getKey().startsWith("holmes.default.rule")) {
String value = entry.getValue().getAsString();
String[] contents = value.split(RULE_CONTENT_SPLIT);
ret.addDefaultRule(new Rule(entry.getKey(), contents[0], contents[1], 1));
}
}
}
}
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