JaroslavTulach commented on a change in pull request #3159:
URL: https://github.com/apache/netbeans/pull/3159#discussion_r707042415
##########
File path:
profiler/lib.profiler/src/org/netbeans/lib/profiler/heap/Progress.java
##########
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 1997, 2021, 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 org.netbeans.lib.profiler.heap;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+enum Progress {
+ COMPUTE_INSTANCES,
+ COMPUTE_REFERENCES,
+ FILL_HEAP_TAG_BOUNDS,
+ COMPUTE_GC_ROOTS;
+
+ Handle start() {
+ return new Handle(this);
+ }
+
+ private static List<Listener> listeners = Collections.emptyList();
+ synchronized static void register(Listener onChange) {
+ if (listeners.isEmpty()) {
+ listeners = Collections.singletonList(onChange);
+ } else {
+ List<Listener> copy = new ArrayList<>(listeners);
+ copy.add(onChange);
+ listeners = copy;
+ }
+ }
+
+ synchronized static void notifyUpdates(Handle h, int type) {
+ for (Listener onChange : listeners) {
+ switch (type) {
+ case 1: onChange.started(h); break;
+ case 2: onChange.progress(h); break;
+ default: onChange.finished(h);
+ }
+ }
+ }
+
+ static interface Listener {
+ void started(Handle h);
+ void progress(Handle h);
+ void finished(Handle h);
+ }
+
+ static final class Handle implements AutoCloseable {
+ final Progress type;
+ private long value;
+ private long startOffset;
+ private long endOffset;
+
+ private Handle(Progress type) {
+ this.type = type;
+ notifyUpdates(this, 1);
+ }
+
+ void progress(long value, long endValue) {
+ progress(value, 0, value, endValue);
+ }
+
+ void progress(long counter, long startOffset, long value, long
endOffset) {
+ // keep this method short so that it can be inlined
+ if (counter % 100000 == 0) {
+ doProgress(value, startOffset, endOffset);
+ }
+ }
+
+ @Override
+ public void close() {
+ notifyUpdates(this, 2);
+ }
+
+ private void doProgress(long value, long startOffset, long endOffset) {
+ this.value = value;
+ this.endOffset = endOffset;
+ this.startOffset = startOffset;
+ notifyUpdates(this, 1);
Review comment:
Opps, thank you. Better to not be lazy: 01c307f
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