124fc4a83d
8290181: convert com/sun/management/UnixOperatingSystemMXBean/GetMaxFileDescriptorCount.sh to java version Reviewed-by: lmesnik, amenkov
66 lines
2.4 KiB
Java
66 lines
2.4 KiB
Java
/*
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* Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4858522
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* @summary Basic unit test of UnixOperatingSystemMXBean.getMaxFileDescriptorCount()
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* @author Steve Bohne
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* @requires os.family != "windows"
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*
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* @run main GetMaxFileDescriptorCount
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*/
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import com.sun.management.UnixOperatingSystemMXBean;
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import java.lang.management.*;
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public class GetMaxFileDescriptorCount {
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private static UnixOperatingSystemMXBean mbean =
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(UnixOperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
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private static long minCountForPass = 1;
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private static final long MAX_COUNT_FOR_PASS = Long.MAX_VALUE;
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public static void main(String args[]) throws Exception {
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long minCount = mbean.getOpenFileDescriptorCount();
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if (minCount > 0) {
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minCountForPass = minCount;
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}
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long count = mbean.getMaxFileDescriptorCount();
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System.out.println("Max file descriptor count: " + count);
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if (count < minCountForPass || count > MAX_COUNT_FOR_PASS) {
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throw new RuntimeException("Max file descriptor count " +
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"illegal value: " + count + " bytes " +
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"(MIN = " + minCountForPass + "; " +
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"MAX = " + MAX_COUNT_FOR_PASS + ")");
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}
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System.out.println("Test passed.");
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}
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}
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