2 * ================================================================================
3 * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 * ============LICENSE_END=========================================================
20 package org.onap.dcae.analytics.web.dmaap;
22 import static org.apache.commons.text.StringEscapeUtils.unescapeJava;
23 import static org.apache.commons.text.StringEscapeUtils.unescapeJson;
24 import static org.onap.dcae.analytics.model.AnalyticsHttpConstants.REQUEST_ID_HEADER_KEY;
26 import java.io.IOException;
27 import java.util.Collections;
28 import java.util.Date;
29 import java.util.LinkedList;
30 import java.util.List;
31 import java.util.stream.IntStream;
33 import javax.annotation.Nonnull;
34 import javax.annotation.Nullable;
36 import org.onap.dcae.analytics.model.AnalyticsHttpConstants;
37 import org.onap.dcae.analytics.model.DmaapMrConstants;
38 import org.onap.dcae.analytics.tca.core.exception.AnalyticsParsingException;
39 import org.onap.dcae.analytics.tca.core.util.LogSpec;
40 import org.onap.dcae.analytics.web.util.AnalyticsHttpUtils;
41 import org.onap.dcae.utils.eelf.logger.api.log.EELFLogFactory;
42 import org.onap.dcae.utils.eelf.logger.api.log.EELFLogger;
43 import org.onap.dcae.utils.eelf.logger.api.spec.AuditLogSpec;
44 import org.onap.dcae.utils.eelf.logger.api.spec.ErrorLogSpec;
45 import org.springframework.integration.splitter.AbstractMessageSplitter;
46 import org.springframework.integration.support.MessageBuilder;
47 import org.springframework.messaging.Message;
49 import com.fasterxml.jackson.databind.JsonNode;
50 import com.fasterxml.jackson.databind.ObjectMapper;
53 * DMaaP MR message splitter split the incoming messages into batch of given batch size
55 * @author Rajiv Singla
57 public class MrMessageSplitter extends AbstractMessageSplitter {
59 private static final EELFLogger eelfLogger = EELFLogFactory.getLogger(MrMessageSplitter.class);
61 private final ObjectMapper objectMapper;
62 private final Integer batchSize;
64 public MrMessageSplitter(@Nonnull final ObjectMapper objectMapper,
65 @Nonnull final Integer batchSize) {
66 this.objectMapper = objectMapper;
67 this.batchSize = batchSize;
71 protected Object splitMessage(final Message<?> message) {
73 final String requestId = AnalyticsHttpUtils.getRequestId(message.getHeaders());
74 final List<String> dmaapMessages = convertJsonToStringMessages(requestId, String.class.cast(message.getPayload()).trim());
76 final String transactionId = AnalyticsHttpUtils.getTransactionId(message.getHeaders());
78 final Date requestBeginTimestamp = AnalyticsHttpUtils.getTimestampFromHeaders(message.getHeaders(),
79 AnalyticsHttpConstants.REQUEST_BEGIN_TS_HEADER_KEY);
80 final AuditLogSpec auditLogSpec = LogSpec.createAuditLogSpec(requestId, requestBeginTimestamp);
82 eelfLogger.auditLog().info("Request Id: {}, Transaction Id: {}, dmaapMessages: {},"
83 + " Received new messages from DMaaP MR. Count: {}",
84 auditLogSpec, requestId, transactionId, dmaapMessages.toString(), String.valueOf(dmaapMessages.size()));
86 final List<List<String>> messagePartitions = partition(dmaapMessages, batchSize);
87 eelfLogger.auditLog().info("Request Id: {}, Transaction Id: {}, Max allowed messages per batch: {}. " +
88 "No of batches created: {}",
89 auditLogSpec, requestId, transactionId, String.valueOf(batchSize), String.valueOf(messagePartitions.size()));
91 // append batch id to request id header
92 return messagePartitions.isEmpty() ? null : IntStream.range(0, messagePartitions.size())
93 .mapToObj(batchIndex ->
95 .withPayload(messagePartitions.get(0))
96 .copyHeaders(message.getHeaders())
97 .setHeader(REQUEST_ID_HEADER_KEY, requestId)
104 * Converts DMaaP MR subscriber messages json string to List of messages. If message Json String is empty
107 * @param messagesJsonString json messages String
109 * @return List containing DMaaP MR Messages
111 private List<String> convertJsonToStringMessages(String requestId, @Nullable final String messagesJsonString) {
113 final LinkedList<String> messages = new LinkedList<>();
115 // If message string is not null or not empty parse json message array to List of string messages
116 if (messagesJsonString != null && !messagesJsonString.trim().isEmpty()
117 && !DmaapMrConstants.SUBSCRIBER_EMPTY_MESSAGE_RESPONSE_STRING.equals(messagesJsonString.trim())) {
121 final JsonNode rootNode = objectMapper.readTree(messagesJsonString);
122 // iterate over root node and parse arrays messages
123 for (JsonNode jsonNode : rootNode) {
124 // if array parse it is array of messages
125 final String incomingMessageString = jsonNode.toString();
126 if (jsonNode.isArray()) {
127 final List messageList = objectMapper.readValue(incomingMessageString, List.class);
128 for (Object message : messageList) {
129 final String jsonMessageString = objectMapper.writeValueAsString(message);
130 addUnescapedJsonToMessage(messages, jsonMessageString);
133 // parse it as object
134 addUnescapedJsonToMessage(messages, incomingMessageString);
138 } catch (IOException e) {
139 ErrorLogSpec errorLogSpec = LogSpec.createErrorLogSpec(requestId);
140 eelfLogger.errorLog().error("Unable to convert subscriber Json String to Messages. " +
141 "Subscriber Response String: {}, Json Error: {}", errorLogSpec, messagesJsonString, e.toString());
142 String errorMessage = String.format("Unable to convert subscriber Json String to Messages. " +
143 "Subscriber Response String: %s, Json Error: %s", messagesJsonString, e);
144 throw new AnalyticsParsingException(errorMessage, e);
152 * Adds unescaped Json messages to given messages list
154 * @param messages message list in which unescaped messages will be added
155 * @param incomingMessageString incoming message string that may need to be escaped
157 private static void addUnescapedJsonToMessage(List<String> messages, String incomingMessageString) {
158 if (incomingMessageString.startsWith("\"") && incomingMessageString.endsWith("\"")) {
159 messages.add(unescapeJava(unescapeJson(
160 incomingMessageString.substring(1, incomingMessageString.length() - 1))));
162 messages.add(unescapeJava(unescapeJson(incomingMessageString)));
167 * Partition list into multiple lists
169 * @param list input list that needs to be broken into chunks
170 * @param batchSize batch size for each list
171 * @param <E> element type of the list
173 * @return List containing list of entries of specified batch size
175 private static <E> List<List<E>> partition(List<E> list, final Integer batchSize) {
177 if (list == null || batchSize == null || batchSize <= 0 || list.size() < batchSize) {
178 return Collections.singletonList(list);
181 final List<List<E>> result = new LinkedList<>();
183 for (int i = 0; i < list.size(); i++) {
185 if (i == 0 || i % batchSize == 0) {
186 List<E> sublist = new LinkedList<>();
190 final List<E> lastSubList = result.get(result.size() - 1);
191 lastSubList.add(list.get(i));