| /* |
| * Copyright (c) 2017, 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. |
| * |
| * 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. |
| */ |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.PrintStream; |
| import java.lang.management.ManagementFactory; |
| import java.util.List; |
| import javax.management.MBeanServer; |
| import javax.management.ObjectName; |
| |
| public class LoggingTest { |
| |
| static class TestStream extends PrintStream { |
| final ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| private volatile boolean recording; |
| public TestStream(PrintStream wrapped) { |
| super(wrapped); |
| } |
| |
| void startRecording() { |
| recording = true; |
| } |
| |
| void stopRecording() { |
| recording = false; |
| } |
| |
| @Override |
| public void write(int b) { |
| if (recording) { |
| bos.write(b); |
| } |
| super.write(b); |
| } |
| |
| @Override |
| public void write(byte[] buf, int off, int len) { |
| if (recording) { |
| bos.write(buf, off, len); |
| } |
| super.write(buf, off, len); |
| } |
| |
| @Override |
| public void write(byte[] buf) throws IOException { |
| if (recording) { |
| bos.write(buf); |
| } |
| super.write(buf); |
| } |
| |
| } |
| |
| public void run(TestStream ts) { |
| |
| // start recording traces and trigger creation of the platform |
| // MBeanServer to produce some. This won't work if the platform |
| // MBeanServer was already initialized - so it's important to |
| // run this test in its own JVM. |
| ts.startRecording(); |
| MBeanServer platform = ManagementFactory.getPlatformMBeanServer(); |
| ts.stopRecording(); |
| String printed = ts.bos.toString(); |
| ts.bos.reset(); |
| |
| // Check that the Platform MBeanServer is emitting the expected |
| // log traces. This can be a bit fragile because debug traces |
| // could be changed without notice - in which case this test will |
| // need to be updated. |
| // For each registered MBean we expect to see three traces. |
| // If the messages logged by the MBeanServer change then these checks |
| // may need to be revisited. |
| List<String> checkTraces = |
| List.of("ObjectName = %s", "name = %s", "JMX.mbean.registered %s"); |
| |
| for (ObjectName o : platform.queryNames(ObjectName.WILDCARD, null)) { |
| String n = o.toString(); |
| System.out.println("Checking log for: " + n); |
| for (String check : checkTraces) { |
| String s = String.format(check, n); |
| if (!printed.contains(s)) { |
| throw new RuntimeException("Trace not found: " + s); |
| } |
| } |
| } |
| } |
| |
| } |