1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2022 Nordix Foundation. 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.openecomp.sdc.be.components.kafka;
import com.google.gson.Gson;
import com.google.gson.JsonSyntaxException;
import fj.data.Either;
import lombok.Setter;
import org.apache.http.HttpStatus;
import org.apache.kafka.common.KafkaException;
import org.openecomp.sdc.be.components.distribution.engine.CambriaErrorResponse;
import org.openecomp.sdc.be.components.distribution.engine.INotificationData;
import org.openecomp.sdc.be.config.BeEcompErrorManager;
import org.openecomp.sdc.be.config.ConfigurationManager;
import org.openecomp.sdc.be.config.DistributionEngineConfiguration;
import org.openecomp.sdc.be.distribution.api.client.CambriaOperationStatus;
import org.openecomp.sdc.common.log.wrappers.Logger;
import org.springframework.stereotype.Component;
/**
* Utility class that provides a handler for Kafka interactions
*/
@Component
public class KafkaHandler {
private static final Logger log = Logger.getLogger(KafkaHandler.class.getName());
private final Gson gson = new Gson();
private SdcKafkaConsumer sdcKafkaConsumer;
private SdcKafkaProducer sdcKafkaProducer;
@Setter
private boolean isKafkaActive;
private DistributionEngineConfiguration deConfiguration;
public KafkaHandler(SdcKafkaConsumer sdcKafkaConsumer, SdcKafkaProducer sdcKafkaProducer, boolean isKafkaActive) {
this.sdcKafkaConsumer = sdcKafkaConsumer;
this.sdcKafkaProducer = sdcKafkaProducer;
this.isKafkaActive = isKafkaActive;
}
public KafkaHandler() {
isKafkaActive = Boolean.parseBoolean(System.getenv().getOrDefault("USE_KAFKA", "false"));
deConfiguration = ConfigurationManager.getConfigurationManager().getDistributionEngineConfiguration();
}
/**
* @return a user configuration whether Kafka is active for this client
*/
public Boolean isKafkaActive() {
return isKafkaActive;
}
/**
* @param topicName The topic from which messages will be fetched
* @return Either A list of messages from a specific topic, or a specific error response
*/
public Either<Iterable<String>, CambriaErrorResponse> fetchFromTopic(String topicName) {
try {
if(sdcKafkaConsumer == null){
sdcKafkaConsumer = new SdcKafkaConsumer(deConfiguration);
}
sdcKafkaConsumer.subscribe(topicName);
Iterable<String> messages = sdcKafkaConsumer.poll(topicName);
log.info("Returning messages from topic {}", topicName);
return Either.left(messages);
} catch (KafkaException e) {
BeEcompErrorManager.getInstance().logBeDistributionEngineSystemError("fetchFromTopic", e.getMessage());
log.error("Failed to fetch from kafka for topic: {}", topicName, e);
CambriaErrorResponse cambriaErrorResponse =
new CambriaErrorResponse(CambriaOperationStatus.INTERNAL_SERVER_ERROR,
HttpStatus.SC_INTERNAL_SERVER_ERROR);
return Either.right(cambriaErrorResponse);
}
}
/**
* Publish notification message to a given topic and flush
*
* @param topicName The topic to which the message should be published
* @param data The data to publish to the topic specified
* @return CambriaErrorResponse a status response on success or any errors thrown
*/
public CambriaErrorResponse sendNotification(String topicName, INotificationData data) {
CambriaErrorResponse response;
if(sdcKafkaProducer == null){
sdcKafkaProducer = new SdcKafkaProducer(deConfiguration);
}
try {
String json = gson.toJson(data);
log.info("Before sending to topic {}", topicName);
sdcKafkaProducer.send(json, topicName);
}
catch(KafkaException e){
BeEcompErrorManager.getInstance().logBeDistributionEngineSystemError("sendNotification", e.getMessage());
log.error("Failed to send message . Exception {}", e.getMessage());
return new CambriaErrorResponse(CambriaOperationStatus.INTERNAL_SERVER_ERROR, 500);
} catch (JsonSyntaxException e) {
BeEcompErrorManager.getInstance().logBeDistributionEngineSystemError("sendNotification", e.getMessage());
log.error("Failed to convert data to json: {}", data, e);
return new CambriaErrorResponse(CambriaOperationStatus.INTERNAL_SERVER_ERROR, 500);
} finally {
try {
sdcKafkaProducer.flush();
response = new CambriaErrorResponse(CambriaOperationStatus.OK, 200);
} catch (KafkaException | IllegalArgumentException e) {
BeEcompErrorManager.getInstance().logBeDistributionEngineSystemError("sendNotification", e.getMessage());
log.error("Failed to flush sdcKafkaProducer", e);
response = new CambriaErrorResponse(CambriaOperationStatus.INTERNAL_SERVER_ERROR, 500);
}
}
return response;
}
}
|
