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This OSGi bundle wraps ${pkgArtifactId} ${pkgVersion} jar file.
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.bootstrap;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
/**
* The Natives class is a wrapper class that checks if the classes necessary for calling native methods are available on
* startup. If they are not available, this class will avoid calling code that loads these classes.
*/
class Natives {
private static final ESLogger logger = Loggers.getLogger(Natives.class);
// marker to determine if the JNA class files are available to the JVM
private static boolean jnaAvailable = false;
static {
try {
// load the JNA version class to see if the JNA is available. this does not ensure that native libraries are
// available
Class.forName("com.sun.jna.Version");
jnaAvailable = true;
} catch(ClassNotFoundException e) {
logger.warn("JNA not found. native methods will be disabled.");
}
}
static void tryMlockall() {
if (!jnaAvailable) {
logger.warn("cannot mlockall because JNA is not available");
return;
}
JNANatives.tryMlockall();
}
static void tryVirtualLock() {
if (!jnaAvailable) {
logger.warn("cannot mlockall because JNA is not available");
return;
}
JNANatives.tryVirtualLock();
}
static void addConsoleCtrlHandler(ConsoleCtrlHandler handler) {
if (!jnaAvailable) {
logger.warn("cannot register console handler because JNA is not available");
return;
}
JNANatives.addConsoleCtrlHandler(handler);
}
static boolean isMemoryLocked() {
if (!jnaAvailable) {
return false;
}
return JNANatives.LOCAL_MLOCKALL;
}
}