Fix: Make CPU hog fix Java 7 compatible

The last fix for the stored config merged from Curly060 used Java8-isms.
In order to be able to include this fix in the next release, which will
be for 1.9, I have converted this to be compatible with Java 7.

Also, a file header was added to place it under APL.

1 files changed, 22 insertions, 7 deletions

diff --git a/src/main/java/com/gitblit/StoredUserConfig.java b/src/main/java/com/gitblit/StoredUserConfig.java
index 2161ebb2..eae1d3cf 100644
--- a/src/main/java/com/gitblit/StoredUserConfig.java
+++ b/src/main/java/com/gitblit/StoredUserConfig.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2021 gitblit.com, Ingo Lafrenz
+ *
+ * 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.
+ */
+
 package com.gitblit;
 
 import java.io.File;
@@ -9,7 +25,6 @@ import java.util.Map;
 import java.util.Objects;
 import java.util.SortedMap;
 import java.util.TreeMap;
-import java.util.function.Function;
 
 /**
  * Simple class with the only purpose to save the realm file (users.conf) in
@@ -29,12 +44,12 @@ public class StoredUserConfig {
 	}
 
 	public void setString(final String section, final String subsection, String name, String value) {
-		Section s = sections.computeIfAbsent(generateKey(section, subsection), new Function<String, Section>() {
-			@Override
-			public Section apply(String k) {
-				return new Section(section, subsection);
-			}
-		});
+		String key = generateKey(section, subsection);
+		Section s = sections.get(key);
+		if (s == null) {
+			s = new Section(section, subsection);
+			sections.put(key, s);
+		}
 		s.addEntry(name, value);
 	}