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Merge pull request #52 from PrabodDunuwila/master
CDC Listening mode support for MongoDB.
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134 changes: 134 additions & 0 deletions
134
...ent/src/main/java/io/siddhi/extension/io/cdc/source/listening/MongoChangeDataCapture.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| /* | ||
| * Copyright (c) 2020, WSO2 Inc. (http://www.wso2.org) All Rights Reserved. | ||
| * | ||
| * WSO2 Inc. 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 io.siddhi.extension.io.cdc.source.listening; | ||
|
|
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| import io.siddhi.core.stream.input.source.SourceEventListener; | ||
| import io.siddhi.extension.io.cdc.util.CDCSourceConstants; | ||
| import org.apache.kafka.connect.connector.ConnectRecord; | ||
| import org.apache.kafka.connect.data.Struct; | ||
| import org.apache.kafka.connect.errors.DataException; | ||
| import org.apache.log4j.Logger; | ||
| import org.json.JSONException; | ||
| import org.json.JSONObject; | ||
|
|
||
| import java.util.HashMap; | ||
| import java.util.Iterator; | ||
| import java.util.Map; | ||
|
|
||
| /** | ||
| * This class is for capturing change data for MongoDB using debezium embedded engine. | ||
| **/ | ||
| public class MongoChangeDataCapture extends ChangeDataCapture { | ||
| private static final Logger log = Logger.getLogger(MongoChangeDataCapture.class); | ||
|
|
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| public MongoChangeDataCapture(String operation, SourceEventListener sourceEventListener) { | ||
| super(operation, sourceEventListener); | ||
| } | ||
|
|
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| Map<String, Object> createMap(ConnectRecord connectRecord, String operation) { | ||
| //Map to return | ||
| Map<String, Object> detailsMap = new HashMap<>(); | ||
| Struct record = (Struct) connectRecord.value(); | ||
| //get the change data object's operation. | ||
| String op; | ||
| try { | ||
| op = (String) record.get(CDCSourceConstants.CONNECT_RECORD_OPERATION); | ||
| } catch (NullPointerException | DataException ex) { | ||
| return detailsMap; | ||
| } | ||
| //match the change data's operation with user specifying operation and proceed. | ||
| if (operation.equalsIgnoreCase(CDCSourceConstants.INSERT) && | ||
| op.equals(CDCSourceConstants.CONNECT_RECORD_INSERT_OPERATION) | ||
| || operation.equalsIgnoreCase(CDCSourceConstants.DELETE) && | ||
| op.equals(CDCSourceConstants.CONNECT_RECORD_DELETE_OPERATION) | ||
| || operation.equalsIgnoreCase(CDCSourceConstants.UPDATE) && | ||
| op.equals(CDCSourceConstants.CONNECT_RECORD_UPDATE_OPERATION)) { | ||
| switch (op) { | ||
| case CDCSourceConstants.CONNECT_RECORD_INSERT_OPERATION: | ||
| //append row details after insert. | ||
| String insertString = (String) record.get(CDCSourceConstants.AFTER); | ||
| JSONObject jsonObj = new JSONObject(insertString); | ||
| detailsMap = getMongoDetailMap(jsonObj); | ||
| break; | ||
| case CDCSourceConstants.CONNECT_RECORD_DELETE_OPERATION: | ||
| //append row details before delete. | ||
| String deleteDocumentId = (String) ((Struct) connectRecord.key()) | ||
| .get(CDCSourceConstants.MONGO_COLLECTION_ID); | ||
| JSONObject jsonObjId = new JSONObject(deleteDocumentId); | ||
| detailsMap.put(CDCSourceConstants.MONGO_COLLECTION_ID, | ||
| jsonObjId.get(CDCSourceConstants.MONGO_COLLECTION_OBJECT_ID)); | ||
|
|
||
| break; | ||
| case CDCSourceConstants.CONNECT_RECORD_UPDATE_OPERATION: | ||
| //append row details before update. | ||
| String updateDocument = (String) record.get(CDCSourceConstants.MONGO_PATCH); | ||
| JSONObject jsonObj1 = new JSONObject(updateDocument); | ||
| JSONObject setJsonObj = (JSONObject) jsonObj1.get(CDCSourceConstants.MONGO_SET); | ||
| detailsMap = getMongoDetailMap(setJsonObj); | ||
| String updateDocumentId = (String) ((Struct) connectRecord.key()) | ||
| .get(CDCSourceConstants.MONGO_COLLECTION_ID); | ||
| JSONObject jsonObjId1 = new JSONObject(updateDocumentId); | ||
| detailsMap.put(CDCSourceConstants.MONGO_COLLECTION_ID, | ||
| jsonObjId1.get(CDCSourceConstants.MONGO_COLLECTION_OBJECT_ID)); | ||
| break; | ||
| default: | ||
| log.info("Provided value for \"op\" : " + op + " is not supported."); | ||
| break; | ||
| } | ||
| } | ||
| return detailsMap; | ||
| } | ||
|
|
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| private Map<String, Object> getMongoDetailMap(JSONObject jsonObj) { | ||
| Map<String, Object> detailsMap = new HashMap<>(); | ||
| Iterator<String> keys = jsonObj.keys(); | ||
| for (Iterator<String> it = keys; it.hasNext(); ) { | ||
| String key = it.next(); | ||
| if (jsonObj.get(key) instanceof Boolean) { | ||
| detailsMap.put(key, jsonObj.getBoolean(key)); | ||
| } else if (jsonObj.get(key) instanceof Integer) { | ||
| detailsMap.put(key, jsonObj.getInt(key)); | ||
| } else if (jsonObj.get(key) instanceof Long) { | ||
| detailsMap.put(key, jsonObj.getDouble(key)); | ||
| } else if (jsonObj.get(key) instanceof Double) { | ||
| detailsMap.put(key, jsonObj.getDouble(key)); | ||
| } else if (jsonObj.get(key) instanceof String) { | ||
| detailsMap.put(key, jsonObj.getString(key)); | ||
| } else if (jsonObj.get(key) instanceof JSONObject) { | ||
| try { | ||
| detailsMap.put(key, Long.parseLong((String) jsonObj.getJSONObject(key) | ||
| .get(CDCSourceConstants.MONGO_OBJECT_NUMBER_LONG))); | ||
| } catch (JSONException notLongObjectEx) { | ||
| try { | ||
| detailsMap.put(key, Double.parseDouble((String) jsonObj.getJSONObject(key) | ||
| .get(CDCSourceConstants.MONGO_OBJECT_NUMBER_DECIMAL))); | ||
| } catch (JSONException notDoubleObjectEx) { | ||
| if (key.equals(CDCSourceConstants.MONGO_COLLECTION_INSERT_ID)) { | ||
| detailsMap.put(CDCSourceConstants.MONGO_COLLECTION_ID, jsonObj.getJSONObject(key) | ||
| .get(CDCSourceConstants.MONGO_COLLECTION_OBJECT_ID)); | ||
| } else { | ||
| detailsMap.put(key, jsonObj.getJSONObject(key).toString()); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return detailsMap; | ||
| } | ||
| } |
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