Purging of cached information

The datafile collector has a cache will all previously published files.
The cache is on regular intevals purged so that non used entries
are removed so that it does not grow infinitely.

Added a unit test.

Change-Id: I8897fee4522c97031f735b1d6774803dcb73926b
Issue-ID: DCAEGEN2-1118
Signed-off-by: PatrikBuhr <patrik.buhr@est.tech>

1 files changed, 64 insertions, 0 deletions

diff --git a/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/service/PublishedFileCacheTest.java b/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/service/PublishedFileCacheTest.java
new file mode 100644
index 00000000..7b38ee42
--- /dev/null
+++ b/datafile-app-server/src/test/java/org/onap/dcaegen2/collectors/datafile/service/PublishedFileCacheTest.java
@@ -0,0 +1,64 @@
+/*
+ * ============LICENSE_START======================================================================
+ * Copyright (C) 2019 Nordix Foundation. 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.dcaegen2.collectors.datafile.service;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.Instant;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+public class PublishedFileCacheTest {
+
+    private static PublishedFileCache testObject;
+
+    @BeforeAll
+    public static void setUp() {
+        testObject = new PublishedFileCache();
+    }
+
+    @Test
+    public void purgeFiles_timeNotExpired() {
+        Assertions.assertNull(testObject.put(Paths.get("A")));
+        Assertions.assertNotNull(testObject.put(Paths.get("A")));
+        testObject.put(Paths.get("B"));
+
+        testObject.purge(Instant.now());
+        Assertions.assertEquals(2, testObject.size());
+    }
+
+    @Test
+    public void purgeFiles_timeExpired() {
+        testObject.put(Paths.get("A"));
+        testObject.put(Paths.get("B"));
+        testObject.put(Paths.get("C"));
+
+        testObject.purge(Instant.MAX);
+        Assertions.assertEquals(0, testObject.size());
+    }
+
+    @Test
+    public void purgeFiles_remove() {
+        Path path = Paths.get("A");
+        testObject.put(path);
+        Assertions.assertEquals(1, testObject.size());
+        testObject.remove(path);
+        Assertions.assertEquals(0, testObject.size());
+    }
+}