2 * ============LICENSE_START======================================================================
3 * Copyright (C) 2019 Nordix Foundation. All rights reserved.
4 * ===============================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
6 * in compliance with the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software distributed under the License
11 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
12 * or implied. See the License for the specific language governing permissions and limitations under
14 * ============LICENSE_END========================================================================
16 package org.onap.dcaegen2.collectors.datafile.service;
18 import java.nio.file.Path;
19 import java.time.Instant;
20 import java.util.Collections;
21 import java.util.HashMap;
22 import java.util.Iterator;
26 * A cache of all files that already has been published. Key is the local file path and the value is
27 * a time stamp, when the key was last used.
29 public class PublishedFileCache {
30 private final Map<Path, Instant> publishedFiles = Collections.synchronizedMap(new HashMap<Path, Instant>());
32 public Instant put(Path path) {
33 return publishedFiles.put(path, Instant.now());
36 public void remove(Path localFileName) {
37 publishedFiles.remove(localFileName);
40 public void purge(Instant now) {
41 for (Iterator<Map.Entry<Path, Instant>> it = publishedFiles.entrySet().iterator(); it.hasNext();) {
42 Map.Entry<Path, Instant> pair = it.next();
43 if (isCachedPublishedFileOutdated(now, pair.getValue())) {
50 return publishedFiles.size();
53 private boolean isCachedPublishedFileOutdated(Instant now, Instant then) {
54 final int timeToKeepInfoInSeconds = 60 * 60 * 24;
55 return now.getEpochSecond() - then.getEpochSecond() > timeToKeepInfoInSeconds;