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
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.logging;
import ai.vespa.validation.Validation;
import com.yahoo.vespa.defaults.Defaults;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.NoSuchFileException;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Function;
import java.util.logging.Level;
import java.util.stream.Stream;
/**
* Spooler that will write an entry to a file and read files that are ready to be sent
*
* @author hmusum
*/
public class Spooler {
private static final java.util.logging.Logger log = java.util.logging.Logger.getLogger(Spooler.class.getName());
private static final Path defaultSpoolPath = Path.of(Defaults.getDefaults().underVespaHome("var/spool/vespa/events"));
private static final Comparator<File> ordering = new TimestampCompare();
private Path processingPath;
private Path readyPath;
private Path failuresPath;
private Path successesPath;
AtomicInteger fileCounter = new AtomicInteger(1);
private final Path spoolPath;
public Spooler() {
this(defaultSpoolPath);
}
public Spooler(Path spoolPath) {
this.spoolPath = spoolPath;
createDirs(spoolPath);
}
void write(LoggerEntry entry) {
writeEntry(entry);
}
public void processFiles(Function<LoggerEntry, Boolean> transport) throws IOException {
List<Path> files = listFilesInPath(readyPath);
if (files.size() == 0) {
log.log(Level.INFO, "No files in ready path " + readyPath.toFile().getAbsolutePath());
return;
}
log.log(Level.FINE, "Files in ready path: " + files.size());
List<File> fileList = getFiles(files, 50); // TODO
if ( ! fileList.isEmpty()) {
processFiles(fileList, transport);
}
}
List<Path> listFilesInPath(Path path) throws IOException {
List<Path> files;
try (Stream<Path> stream = Files.list(path)) {
files = stream.toList();
// TODO: Or check if stream is empty
} catch (NoSuchFileException e) {
return List.of(); // No files, this is OK
}
return files;
}
public void processFiles(List<File> files, Function<LoggerEntry, Boolean> transport) throws IOException {
for (File f : files) {
log.log(Level.INFO, "Found file " + f);
var content = Files.readAllBytes(f.toPath());
var entry = LoggerEntry.fromJson(content);
if (transport.apply(entry)) {
Path file = f.toPath();
Path target = spoolPath.resolve(successesPath).resolve(f.toPath().relativize(file)).resolve(f.getName());
Files.move(file, target);
}
}
}
public Path processingPath() { return processingPath; }
public Path readyPath() { return readyPath; }
public Path successesPath() { return successesPath; }
public Path failuresPath() { return failuresPath; }
List<File> getDirectories(File[] files) {
List<File> fileList = new ArrayList<>();
for (File f : files) {
if (f.isDirectory()) {
fileList.add(f);
}
}
Collections.sort(fileList);
return fileList;
}
List<File> getFiles(List<Path> files, int count) {
Validation.requireAtLeast(count, "count must be a positive number", 1);
List<File> fileList = new ArrayList<>();
for (Path p : files) {
File f = p.toFile();
if (!f.isDirectory()) {
fileList.add(f);
}
// Grab only some files
if (fileList.size() > count) {
break;
}
}
fileList.sort(ordering);
return fileList;
}
private void writeEntry(LoggerEntry entry) {
String fileName = String.valueOf(fileCounter);
Path file = spoolPath.resolve(processingPath).resolve(fileName);
try {
Files.writeString(file, entry.toJson(), StandardOpenOption.WRITE, StandardOpenOption.APPEND, StandardOpenOption.CREATE);
Path target = spoolPath.resolve(readyPath).resolve(file.relativize(file)).resolve(fileName);
log.log(Level.INFO, "Moving file from " + file + " to " + target);
Files.move(file, target);
fileCounter.addAndGet(1);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
private void createDirs(Path spoolerPath) {
processingPath = createDir(spoolerPath.resolve("processing"));
readyPath = createDir(spoolerPath.resolve("ready"));
failuresPath = createDir(spoolerPath.resolve("failures"));
successesPath = createDir(spoolerPath.resolve("successes"));
}
private static Path createDir(Path path) {
File file = path.toFile();
if (file.exists() && file.canRead() && file.canWrite()) {
log.log(Level.INFO, "Directory " + path + " already exists");
} else if (file.mkdirs()) {
log.log(Level.FINE, "Created " + path);
} else {
log.log(Level.WARNING, "Could not create " + path + ", please check permissions");
}
return path;
}
private static class TimestampCompare implements Comparator<File> {
public int compare(File a, File b) {
return (int) (a.lastModified() - b.lastModified());
}
}
}
|
