--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/FilePurger.java Wed Oct 30 19:43:52 2019 +0100
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.internal;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+import jdk.jfr.internal.SecuritySupport.SafePath;
+
+// This class keeps track of files that can't be deleted
+// so they can a later staged be removed.
+final class FilePurger {
+
+ private final static Set<SafePath> paths = new LinkedHashSet<>();
+
+ public synchronized static void add(SafePath p) {
+ paths.add(p);
+ if (paths.size() > 1000) {
+ removeOldest();
+ }
+ }
+
+ public synchronized static void purge() {
+ if (paths.isEmpty()) {
+ return;
+ }
+
+ for (SafePath p : new ArrayList<>(paths)) {
+ if (delete(p)) {
+ paths.remove(p);
+ }
+ }
+ }
+
+ private static void removeOldest() {
+ SafePath oldest = paths.iterator().next();
+ paths.remove(oldest);
+ }
+
+ private static boolean delete(SafePath p) {
+ try {
+ SecuritySupport.delete(p);
+ return true;
+ } catch (IOException e) {
+ return false;
+ }
+ }
+}