Github user kinow commented on a diff in the pull request:
https://github.com/apache/commons-lang/pull/231#discussion_r105107484
--- Diff: src/main/java/org/apache/commons/lang3/ArchUtils.java ---
@@ -0,0 +1,446 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.commons.lang3;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * An utility class for the os.arch System Property. The class defines
methods for
+ * identifying the architecture of the current JVM.
+ * <p>
+ * <p>
+ * Important: The os.arch System Property returns the architecture used by
the JVM
+ * not of the operating system.
+ * </p>
+ *
+ * @author Tomschi
+ */
+public class ArchUtils {
+
+ /**
+ * This {@link Map} contains the the possible os.arch property {@link
String}'s.
+ */
+ private static final Map<String, String> map;
+
+ /**
+ * The value for x86 architecture.
+ */
+ private static final String X86 = "x86";
+
+ /**
+ * The value for x86_64 architecture.
+ */
+ private static final String X86_64 = "x86_64";
+
+ /**
+ * The value for ia64_32 architecture.
+ */
+ private static final String IA64_32 = "ia64_32";
+
+ /**
+ * The value for ia64 architecture.
+ */
+ private static final String IA64 = "ia64";
+
+ /**
+ * The value for ppc architecture.
+ */
+ private static final String PPC = "ppc";
+
+ /**
+ * The value for ppc64 architecture.
+ */
+ private static final String PPC64 = "ppc64";
+
+ static {
+ map = new ConcurrentHashMap<>();
--- End diff --
Much better, from a concurrency point of view :-)
Now my preference would be do not allow the user to change it. Otherwise
you could accidentally remove one arch, or overwrite it. Besides that, I don't
see why we need to let users change that.
If there is an architecture that is not supported, I think it would be
better that users will apply a temporary patch to their code and/or report an
issue. Then we will update the list of architectures.
Maybe we could include it as in [crypto] @Tomschi , as a read-only
structure for now, and then later discuss about exposing methods to manipulate
the map. What do you think?
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