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
|
/*
* ===============================LICENSE_START======================================
* dcae-analytics
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property. 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.dcae.apod.analytics.cdap.tca.worker;
import co.cask.cdap.api.worker.AbstractWorker;
import com.google.common.base.Preconditions;
import org.openecomp.dcae.apod.analytics.common.AnalyticsConstants;
import org.openecomp.dcae.apod.analytics.common.exception.DCAEAnalyticsRuntimeException;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.atomic.AtomicBoolean;
import static java.lang.String.format;
/**
* Base logic for DMaaP Workers which uses scheduler to poll DMaaP MR topics at frequent intervals
* <p>
* @author Rajiv Singla . Creation Date: 12/19/2016.
*/
public abstract class BaseTCADMaaPMRWorker extends AbstractWorker {
private static final Logger LOG = LoggerFactory.getLogger(BaseTCADMaaPMRWorker.class);
/**
* Quartz Scheduler
*/
protected Scheduler scheduler;
/**
* Determines if scheduler is shutdown
*/
protected AtomicBoolean isSchedulerShutdown;
@Override
public void run() {
Preconditions.checkNotNull(scheduler, "Scheduler must not be null");
String schedulerName = "";
// Start scheduler
try {
schedulerName = scheduler.getSchedulerName();
scheduler.start();
isSchedulerShutdown.getAndSet(false);
} catch (SchedulerException e) {
final String errorMessage =
format("Error while starting TCA DMaaP MR scheduler name: %s, error: %s", schedulerName, e);
throw new DCAEAnalyticsRuntimeException(errorMessage, LOG, e);
}
LOG.info("Successfully started DMaaP MR Scheduler: {}", schedulerName);
// indefinite loop which wakes up and confirms scheduler is indeed running
while (!isSchedulerShutdown.get()) {
try {
Thread.sleep(AnalyticsConstants.TCA_DEFAULT_WORKER_SHUTDOWN_CHECK_INTERVAL_MS);
} catch (InterruptedException e) {
final String errorMessage =
format("Error while checking TCA DMaaP MR Scheduler worker status name: %s, error: %s",
schedulerName, e);
throw new DCAEAnalyticsRuntimeException(errorMessage, LOG, e);
}
}
LOG.info("Finished execution of TCA DMaaP MR worker thread: {}", schedulerName);
}
@Override
public void stop() {
Preconditions.checkNotNull(scheduler, "Scheduler must not be null");
String schedulerName = "";
// Stop Scheduler
try {
schedulerName = scheduler.getSchedulerName();
LOG.info("Shutting TCA DMaaP MR Scheduler: {}", schedulerName);
scheduler.shutdown();
isSchedulerShutdown.getAndSet(true);
} catch (SchedulerException e) {
final String errorMessage =
format("Error while shutting down TCA DMaaP MR Scheduler: name: %s, error: %s", schedulerName, e);
throw new DCAEAnalyticsRuntimeException(errorMessage, LOG, e);
}
}
}
|
