blob: d5ee0d37568b425e88021e86aa219ee9e2054286 (
plain) (
blame)
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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespavisit;
import com.yahoo.documentapi.ProgressToken;
import com.yahoo.documentapi.VisitorControlHandler;
import com.yahoo.documentapi.VisitorDataHandler;
import com.yahoo.vdslib.VisitorStatistics;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.Duration;
import java.util.Date;
import java.util.TimeZone;
import java.text.DateFormat;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import static java.nio.file.StandardCopyOption.ATOMIC_MOVE;
import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
/**
* An abstract class that can be subclassed by different visitor handlers.
*
* @author Thomas Gundersen
*/
public abstract class VdsVisitHandler {
boolean showProgress;
boolean showStatistics;
boolean abortOnClusterDown;
boolean lastLineIsProgress = false;
String lastPercentage;
final Object printLock = new Object();
private static class ProgressMeta {
String fileName = "";
String lastProgressContents;
int unwrittenUpdates = 0;
long lastWriteAtNanos = 0;
Duration writeInterval = Duration.ofSeconds(10);
boolean shouldWriteProgress() {
return !fileName.isEmpty();
}
}
ProgressMeta progressMeta = new ProgressMeta();
final VisitorControlHandler controlHandler = new ControlHandler();
public VdsVisitHandler(boolean showProgress, boolean showStatistics, boolean abortOnClusterDown) {
this.showProgress = showProgress;
this.showStatistics = showStatistics;
this.abortOnClusterDown = abortOnClusterDown;
this.progressMeta.lastWriteAtNanos = System.nanoTime(); // Avoid always writing a file on the first progress update
}
public boolean getShowProgress() {
return showProgress;
}
public boolean getShowStatistics() {
return showStatistics;
}
public boolean getAbortOnClusterDown() {
return abortOnClusterDown;
}
public boolean getLastLineIsProgress() {
return lastLineIsProgress;
}
public void setLastLineIsProgress(boolean isProgress) {
lastLineIsProgress = isProgress;
}
public String getLastPercentage() {
return lastPercentage;
}
public void setLastPercentage(String lastPercentage) {
this.lastPercentage = lastPercentage;
}
public Object getPrintLock() {
return printLock;
}
public void onDone() { }
public String getProgressFileName() {
return progressMeta.fileName;
}
public void setProgressFileName(String progressFileName) {
this.progressMeta.fileName = progressFileName;
}
public VisitorControlHandler getControlHandler() { return controlHandler; }
public abstract VisitorDataHandler getDataHandler();
class ControlHandler extends VisitorControlHandler {
VisitorStatistics statistics;
private void rewriteProgressFile() {
try {
var tmpPath = Path.of(progressMeta.fileName + ".tmp");
Files.writeString(tmpPath, progressMeta.lastProgressContents);
Files.move(tmpPath, Path.of(progressMeta.fileName), REPLACE_EXISTING, ATOMIC_MOVE);
} catch (IOException e) {
e.printStackTrace();
abort(); // Don't continue visiting if we're unable to save progress state
}
}
public void onProgress(ProgressToken token) {
if (progressMeta.shouldWriteProgress()) {
synchronized (token) {
progressMeta.unwrittenUpdates++;
progressMeta.lastProgressContents = token.toString();
long nowNanos = System.nanoTime();
if ((nowNanos - progressMeta.lastWriteAtNanos) > progressMeta.writeInterval.toNanos()) {
rewriteProgressFile();
progressMeta.unwrittenUpdates = 0;
progressMeta.lastWriteAtNanos = nowNanos;
}
}
}
if (showProgress) {
synchronized (printLock) {
DecimalFormat df = new DecimalFormat("#.#");
String percentage = df.format(token.percentFinished());
if (!percentage.equals(lastPercentage)) {
if (lastLineIsProgress) {
System.err.print('\r');
}
// Pad with a few extra spaces to handle case where current line written is shorter
// than the previous line written. Would otherwise leave stale characters behind.
System.err.print(percentage + " % finished. ");
lastLineIsProgress = true;
lastPercentage = percentage;
}
}
}
super.onProgress(token);
}
@Override
public void onVisitorStatistics(VisitorStatistics visitorStatistics) {
statistics = visitorStatistics;
}
private String getDateTime() {
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss zzz");
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
Date date = new Date();
return dateFormat.format(date);
}
public void onVisitorError(String message) {
synchronized (printLock) {
if (lastLineIsProgress) {
System.err.print('\r');
lastLineIsProgress = false;
}
System.err.println("Visitor error (" + getDateTime() + "): " + message);
if (abortOnClusterDown && !isDone() && (message.lastIndexOf("Could not resolve")>=0 ||
message.lastIndexOf("don't allow external load")>=0)) {
System.err.println("Aborting visitor as --abortonclusterdown flag is set.");
abort();
}
}
}
public void onDone(CompletionCode code, String message) {
// Flush any remaining unwritten progress updates.
// It is expected that this happens-after any and all calls to onProgress().
if (progressMeta.unwrittenUpdates > 0) {
rewriteProgressFile();
}
if (lastLineIsProgress) {
System.err.print('\n');
lastLineIsProgress = false;
}
if (code != CompletionCode.SUCCESS) {
if (code == CompletionCode.ABORTED) {
System.err.println("Visitor aborted: " + message);
}
else if (code == CompletionCode.TIMEOUT) {
System.err.println("Visitor timed out: " + message);
}
else {
System.err.println("Visitor aborted due to unknown issue " + code + ": " + message);
}
} else {
if (showProgress) {
System.err.println("Completed visiting.");
}
if (showStatistics) {
System.err.println("*** Visitor statistics");
System.err.println(statistics == null ? "Nothing visited" : statistics.toString());
}
}
super.onDone(code, message);
}
}
}
|
