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
|
/*-
* ============LICENSE_START=======================================================
* Simulator
* ================================================================================
* Copyright (C) 2019 Nokia. 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.onap.pnfsimulator.filesystem;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardWatchEventKinds;
import java.nio.file.WatchEvent;
import java.nio.file.WatchEvent.Kind;
import java.time.Instant;
import java.util.Arrays;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import lombok.extern.slf4j.Slf4j;
import org.bson.BSONException;
import org.bson.json.JsonParseException;
import org.onap.pnfsimulator.db.Storage;
import org.onap.pnfsimulator.template.Template;
import org.bson.Document;
@Slf4j
public enum WatcherEventProcessor {
CREATED(StandardWatchEventKinds.ENTRY_CREATE) {
@Override
public void processEvent(Path path, Storage<Template> storage) throws IOException {
String content = getContent(path);
String fileName = path.getFileName().toString();
Document documentsContent = Document.parse(content);
storage.persist(new Template(fileName, documentsContent, Instant.now().getNano()));
log.info("DB record created for template: " + fileName);
}
},
MODIFIED(StandardWatchEventKinds.ENTRY_MODIFY) {
@Override
public void processEvent(Path path, Storage<Template> storage) throws IOException {
String fileName = path.getFileName().toString();
String content = getContent(path);
Document documentsContent = Document.parse(content);
Template template = storage.get(fileName).orElse(new Template(fileName, documentsContent, Instant.now().getNano()));
template.setContent(documentsContent);
storage.persist(template);
log.info("DB record modified for template: " + fileName);
}
},
DELETED(StandardWatchEventKinds.ENTRY_DELETE) {
@Override
public void processEvent(Path path, Storage<Template> storage) {
String fileName = path.getFileName().toString();
storage.delete(fileName);
log.info("DB record deleted for template: " + fileName);
}
};
private final Kind<Path> pathKind;
String getContent(Path path) throws IOException {
try (Stream<String> lines = Files.lines(path, StandardCharsets.UTF_8)) {
return lines.collect(Collectors.joining(System.lineSeparator()));
} catch (IOException e) {
log.error("Could not get content due to: " + e.getMessage() + " " + e.getCause(), e);
throw e;
}
}
WatcherEventProcessor(Kind<Path> pathKind) {
this.pathKind = pathKind;
}
public abstract void processEvent(Path templateName, Storage<Template> storage) throws IOException;
static void process(WatchEvent<?> event, Storage<Template> storage, Path templatesDir) {
Optional<WatcherEventProcessor> watcherEventProcessor = getWatcherEventProcessor(event);
watcherEventProcessor.ifPresent(processor -> {
try {
final Path templatePath = templatesDir.resolve((Path) event.context());
processor.processEvent(templatePath, storage);
} catch (IOException e) {
log.error("Error during processing DB record for template.", e);
} catch (BSONException | JsonParseException e) {
log.error("Invalid JSON format provided for template.", e);
}
});
}
private static Optional<WatcherEventProcessor> getWatcherEventProcessor(WatchEvent<?> event) {
return Arrays.stream(values()).filter(value -> value.pathKind.equals(event.kind())).findFirst();
}
}
|
