blob: fa716921be5d0b33cef740b6b30d7b287012c251 (
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
209
210
211
212
213
214
|
// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.logserver.handlers.archive;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.GZIPOutputStream;
/**
* This class holds information about all (log) files contained
* in the logarchive directory hierarchy. It also has functionality
* for compressing log files and deleting older files.
*
* @author Arne Juul
*/
public class FilesArchived {
private static final Logger log = Logger.getLogger(FilesArchived.class.getName());
/**
* File instance representing root directory of archive
*/
private final File root;
// known-existing files inside the archive directory
private List<LogFile> knownFiles;
public final static long compressAfterMillis = 2L * 3600 * 1000;
private long maxAgeDays = 30; // GDPR rules: max 30 days
private long sizeLimit = 30L * (1L << 30); // 30 GB
/**
* Creates an FilesArchive managing the given directory
*/
public FilesArchived(File rootDir) {
this.root = rootDir;
maintenance();
}
public String toString() {
return FilesArchived.class.getName() + ": root=" + root;
}
public int highestGen(String prefix) {
int gen = 0;
for (LogFile lf : knownFiles) {
if (prefix.equals(lf.prefix)) {
gen = Math.max(gen, lf.generation);
}
}
return gen;
}
public synchronized void maintenance() {
rescan();
if (removeOlderThan(maxAgeDays)) rescan();
if (compressOldFiles()) rescan();
long days = maxAgeDays;
while (tooMuchDiskUsage() && (--days > 1)) {
if (removeOlderThan(days)) rescan();
}
}
private void rescan() {
knownFiles = scanDir(root);
}
boolean tooMuchDiskUsage() {
long sz = sumFileSizes();
return sz > sizeLimit;
}
private boolean olderThan(LogFile lf, long days, long now) {
long mtime = lf.path.lastModified();
long diff = now - mtime;
return (diff > days * 86400L * 1000L);
}
// returns true if any files were removed
private boolean removeOlderThan(long days) {
boolean action = false;
long now = System.currentTimeMillis();
for (LogFile lf : knownFiles) {
if (olderThan(lf, days, now)) {
lf.path.delete();
log.info("Deleted: "+lf.path);
action = true;
}
}
return action;
}
// returns true if any files were compressed
private boolean compressOldFiles() {
boolean action = false;
long now = System.currentTimeMillis();
int count = 0;
for (LogFile lf : knownFiles) {
// avoid compressing entire archive at once
if (lf.canCompress(now) && (count++ < 5)) {
compress(lf.path);
}
}
return count > 0;
}
private void compress(File oldFile) {
File gzippedFile = new File(oldFile.getPath() + ".gz");
try {
long mtime = oldFile.lastModified();
GZIPOutputStream compressor = new GZIPOutputStream(new FileOutputStream(gzippedFile), 0x100000);
FileInputStream inputStream = new FileInputStream(oldFile);
byte [] buffer = new byte[0x100000];
for (int read = inputStream.read(buffer); read > 0; read = inputStream.read(buffer)) {
compressor.write(buffer, 0, read);
}
inputStream.close();
compressor.finish();
compressor.flush();
compressor.close();
oldFile.delete();
gzippedFile.setLastModified(mtime);
log.info("Compressed: "+gzippedFile);
} catch (IOException e) {
log.warning("Got '" + e + "' while compressing '" + oldFile.getPath() + "'.");
}
}
public long sumFileSizes() {
long sum = 0;
for (LogFile lf : knownFiles) {
sum += lf.path.length();
}
return sum;
}
private static List<LogFile> scanDir(File top) {
List<LogFile> retval = new ArrayList<>();
String[] names = top.list();
if (names != null) {
for (String name : names) {
File sub = new File(top, name);
if (sub.isFile()) {
retval.add(new LogFile(sub));
} else if (sub.isDirectory()) {
for (LogFile subFile : scanDir(sub)) {
retval.add(subFile);
}
}
}
}
return retval;
}
static class LogFile {
public final File path;
public final String prefix;
public final int generation;
public final boolean zsuff;
public boolean canCompress(long now) {
if (zsuff) return false; // already compressed
if (! path.isFile()) return false; // not a file
long diff = now - path.lastModified();
if (diff < compressAfterMillis) return false; // too new
return true;
}
private static int generationOf(String name) {
int dash = name.lastIndexOf('-');
if (dash < 0) return 0;
String suff = name.substring(dash + 1);
int r = 0;
for (char ch : suff.toCharArray()) {
if (ch >= '0' && ch <= '9') {
r *= 10;
r += (ch - '0');
} else {
break;
}
}
return r;
}
private static String prefixOf(String name) {
int dash = name.lastIndexOf('-');
if (dash < 0) return name;
return name.substring(0, dash);
}
private static boolean zSuffix(String name) {
if (name.endsWith(".gz")) return true;
// add other compression suffixes here
return false;
}
public LogFile(File path) {
String name = path.toString();
this.path = path;
this.prefix = prefixOf(name);
this.generation = generationOf(name);
this.zsuff = zSuffix(name);
}
public String toString() {
return "FilesArchived.LogFile{name="+path+" prefix="+prefix+" gen="+generation+" z="+zsuff+"}";
}
}
}
|
