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Merge pull request #230 from jamezp/LOGMGR-218
[LOGMGR-218] Follows up on the previous commit which could potentiall…
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/* | ||
* JBoss, Home of Professional Open Source. | ||
* | ||
* Copyright 2019 Red Hat, Inc., and individual contributors | ||
* as indicated by the @author tags. | ||
* | ||
* 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. | ||
*/ | ||
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package org.jboss.logmanager; | ||
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import java.security.AccessController; | ||
import java.security.PrivilegedAction; | ||
import java.util.regex.Matcher; | ||
import java.util.regex.Pattern; | ||
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/** | ||
* This is required to be separate from the {@link JDKSpecific} helper. It's specifically required for WildFly embedded | ||
* as the {@link JDKSpecific} initializes JBoss Modules which could cause issues if it's initialized too early. This | ||
* avoids the early initialization. | ||
* | ||
* @author <a href="mailto:[email protected]">James R. Perkins</a> | ||
*/ | ||
final class Jvm { | ||
private static final boolean MODULAR_JVM; | ||
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static { | ||
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// Get the current Java version and determine, by JVM version level, if this is a modular JDK | ||
final String value = AccessController.doPrivileged(new PrivilegedAction<String>() { | ||
@Override | ||
public String run() { | ||
return System.getProperty("java.specification.version"); | ||
} | ||
}); | ||
// Shouldn't happen, but we'll assume we're not a modular environment | ||
boolean modularJvm = false; | ||
if (value != null) { | ||
final Matcher matcher = Pattern.compile("^(?:1\\.)?(\\d+)$").matcher(value); | ||
if (matcher.find()) { | ||
modularJvm = Integer.parseInt(matcher.group(1)) >= 9; | ||
} | ||
} | ||
MODULAR_JVM = modularJvm; | ||
} | ||
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/** | ||
* Determines whether or not this is a modular JVM. The version of the {@code java.specification.version} is checked | ||
* to determine if the version is greater than or equal to 9. This is required to disable specific features/hacks | ||
* for older JVM's when the log manager is loaded on the boot class path which doesn't support multi-release JAR's. | ||
* | ||
* @return {@code true} if determined to be a modular JVM, otherwise {@code false} | ||
*/ | ||
static boolean isModular() { | ||
return MODULAR_JVM; | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
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/* | ||
* JBoss, Home of Professional Open Source. | ||
* | ||
* Copyright 2019 Red Hat, Inc., and individual contributors | ||
* as indicated by the @author tags. | ||
* | ||
* 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. | ||
*/ | ||
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package org.jboss.logmanager; | ||
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/** | ||
* @author <a href="mailto:[email protected]">James R. Perkins</a> | ||
*/ | ||
final class Jvm { | ||
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/** | ||
* Always returns {@code true}. | ||
* | ||
* @return {@code true} | ||
*/ | ||
static boolean isModular() { | ||
return true; | ||
} | ||
} |
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