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
|
/*
* Copyright 2015 Open Networking Laboratory
*
* 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.
*/
package org.onosproject.provider.of.flow.impl;
import org.onlab.util.SharedExecutors;
import org.onosproject.openflow.controller.OpenFlowSwitch;
import org.onosproject.openflow.controller.RoleState;
import org.projectfloodlight.openflow.protocol.OFTableStatsRequest;
import org.slf4j.Logger;
import java.util.Timer;
import java.util.TimerTask;
import static org.slf4j.LoggerFactory.getLogger;
/**
* Collects Table statistics for the specified switch.
*/
class TableStatisticsCollector {
private final Logger log = getLogger(getClass());
public static final int SECONDS = 1000;
private final OpenFlowSwitch sw;
private Timer timer;
private TimerTask task;
private int pollInterval;
/**
* Creates a new table statistics collector for the given switch and poll frequency.
*
* @param timer timer to use for scheduling
* @param sw switch to pull
* @param pollInterval poll frequency in seconds
*/
TableStatisticsCollector(Timer timer, OpenFlowSwitch sw, int pollInterval) {
this.timer = timer;
this.sw = sw;
this.pollInterval = pollInterval;
}
/**
* Adjusts poll frequency.
*
* @param pollInterval poll frequency in seconds
*/
synchronized void adjustPollInterval(int pollInterval) {
this.pollInterval = pollInterval;
task.cancel();
task = new InternalTimerTask();
timer.scheduleAtFixedRate(task, pollInterval * SECONDS, pollInterval * 1000);
}
private class InternalTimerTask extends TimerTask {
@Override
public void run() {
if (sw.getRole() == RoleState.MASTER) {
log.trace("Collecting stats for {}", sw.getStringId());
OFTableStatsRequest request = sw.factory().buildTableStatsRequest()
.build();
sw.sendMsg(request);
}
}
}
public synchronized void start() {
// Initially start polling quickly. Then drop down to configured value
log.debug("Starting Table Stats collection thread for {}", sw.getStringId());
task = new InternalTimerTask();
SharedExecutors.getTimer().scheduleAtFixedRate(task, 1 * SECONDS,
pollInterval * SECONDS);
}
public synchronized void stop() {
log.debug("Stopping Table Stats collection thread for {}", sw.getStringId());
task.cancel();
task = null;
}
}
|
