| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.metron.common.configuration.enrichment.handler; |
| |
| import com.google.common.base.Joiner; |
| import org.apache.metron.common.stellar.StellarAssignment; |
| import org.apache.metron.common.stellar.StellarProcessor; |
| import org.json.simple.JSONObject; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.*; |
| import java.util.function.Function; |
| |
| public class StellarConfig implements Config { |
| protected static final Logger _LOG = LoggerFactory.getLogger(StellarConfig.class); |
| @Override |
| public List<String> getSubgroups(Iterable<Map.Entry<String, Object>> config) { |
| boolean includeEmpty = false; |
| List<String> ret = new ArrayList<>(); |
| for(Map.Entry<String, Object> kv : config) { |
| if(kv.getValue() instanceof String) { |
| includeEmpty = true; |
| } |
| else if(kv.getValue() instanceof Map || kv.getValue() instanceof List) { |
| ret.add(kv.getKey()); |
| } |
| } |
| if(includeEmpty) { |
| ret.add(""); |
| } |
| return ret; |
| } |
| |
| @Override |
| public Iterable<Map.Entry<String, Object>> toConfig(Object c) { |
| if(c instanceof Map) { |
| return ((Map<String, Object>)c).entrySet(); |
| } |
| else if(c instanceof Collection) { |
| List<Map.Entry<String, Object>> ret = new ArrayList<>(); |
| for(Object o : (Collection)c) { |
| if(o instanceof String) { |
| StellarAssignment assignment = StellarAssignment.from((String)o); |
| ret.add(assignment); |
| } |
| else if(o instanceof Map.Entry) { |
| ret.add((Map.Entry<String, Object>)o); |
| } |
| else { |
| throw new IllegalStateException("Expected " + c + " to be a list of strings, but got non-string."); |
| } |
| } |
| return ret; |
| } |
| throw new IllegalStateException("Unable to convert config " + c |
| + " to stellar config. Expected List<String> or Map<String, Object>"); |
| } |
| |
| @Override |
| public List<JSONObject> splitByFields( JSONObject message |
| , Object fields |
| , Function<String, String> fieldToEnrichmentKey |
| , Iterable<Map.Entry<String, Object>> config |
| ) |
| { |
| StellarProcessor processor = new StellarProcessor(); |
| List<JSONObject> messages = new ArrayList<>(); |
| List<String> defaultStellarStatementGroup = new ArrayList<>(); |
| for(Map.Entry<String, Object> kv : config) { |
| if(kv.getValue() instanceof String) { |
| defaultStellarStatementGroup.add((String)kv.getValue()); |
| } |
| else if(kv.getValue() instanceof Map) { |
| JSONObject ret = new JSONObject(); |
| ret.put(kv.getKey(), getMessage(getFields(processor, (Map)kv.getValue()), message)); |
| messages.add(ret); |
| } |
| else if(kv.getValue() instanceof List) { |
| JSONObject ret = new JSONObject(); |
| ret.put(kv.getKey(), getMessage(getFields(processor, (List)kv.getValue()), message)); |
| messages.add(ret); |
| } |
| } |
| if(defaultStellarStatementGroup.size() > 0) |
| { |
| JSONObject ret = new JSONObject(); |
| ret.put("", getMessage(getFields(processor, defaultStellarStatementGroup), message)); |
| messages.add(ret); |
| } |
| _LOG.debug("Stellar enrichment split: {}", messages ); |
| return messages; |
| } |
| |
| private Set<String> getFields(StellarProcessor processor |
| , List<String> stellarStatementGroup |
| ) |
| { |
| Set<String> stellarFields = new HashSet<>(); |
| for(String stellarStatementExpr: stellarStatementGroup) { |
| StellarAssignment assignment = StellarAssignment.from(stellarStatementExpr); |
| if(assignment.getStatement() != null) { |
| Set<String> variables = processor.variablesUsed(assignment.getStatement()); |
| if (variables != null) { |
| stellarFields.addAll(variables); |
| } |
| } |
| } |
| return stellarFields; |
| } |
| |
| private Set<String> getFields( StellarProcessor processor |
| , Map<String, String> stellarStatementGroup |
| ) { |
| Set<String> stellarFields = new HashSet<>(); |
| for (String stellarStatement : stellarStatementGroup.values()) { |
| Set<String> variables = processor.variablesUsed(stellarStatement); |
| if (variables != null) { |
| stellarFields.addAll(variables); |
| } |
| } |
| return stellarFields; |
| } |
| |
| private Map<String, Object> getMessage( Set<String> stellarFields |
| , JSONObject message |
| ) |
| { |
| |
| Map<String, Object> messageSegment = new HashMap<>(); |
| for(String variable : stellarFields) { |
| messageSegment.put(variable, message.get(variable)); |
| } |
| return messageSegment; |
| } |
| } |