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/*
* 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.tomcat.jni;
import java.io.File;
public final class Library {
/* Default library names - use 2.x in preference to 1.x if both are available */
private static final String[] NAMES = { "tcnative-2", "libtcnative-2", "tcnative-1", "libtcnative-1" };
/* System property used to define CATALINA_HOME */
private static final String CATALINA_HOME_PROP = "catalina.home";
/*
* A handle to the unique Library singleton instance.
*/
private static Library _instance = null;
private Library() throws Exception {
boolean loaded = false;
StringBuilder err = new StringBuilder();
File binLib = new File(System.getProperty(CATALINA_HOME_PROP), "bin");
for (int i = 0; i < NAMES.length; i++) {
File library = new File(binLib, System.mapLibraryName(NAMES[i]));
try {
System.load(library.getAbsolutePath());
loaded = true;
} catch (VirtualMachineError t) {
throw t;
} catch (Throwable t) {
if (library.exists()) {
// File exists but failed to load
throw t;
}
if (i > 0) {
err.append(", ");
}
err.append(t.getMessage());
}
if (loaded) {
break;
}
}
if (!loaded) {
String path = System.getProperty("java.library.path");
String[] paths = path.split(File.pathSeparator);
for (String value : NAMES) {
try {
System.loadLibrary(value);
loaded = true;
} catch (VirtualMachineError t) {
throw t;
} catch (Throwable t) {
String name = System.mapLibraryName(value);
for (String s : paths) {
File fd = new File(s, name);
if (fd.exists()) {
// File exists but failed to load
throw t;
}
}
if (!err.isEmpty()) {
err.append(", ");
}
err.append(t.getMessage());
}
if (loaded) {
break;
}
}
}
if (!loaded) {
StringBuilder names = new StringBuilder();
for (String name : NAMES) {
names.append(name);
names.append(", ");
}
throw new LibraryNotFoundError(names.substring(0, names.length() - 2), err.toString());
}
}
private Library(String libraryName) {
System.loadLibrary(libraryName);
}
/**
* Create Tomcat Native's global APR pool. This has to be the first call to TCN library.
*/
private static native boolean initialize();
/**
* Destroys Tomcat Native's global APR pool. This has to be the last call to TCN library. This will destroy any APR
* root pools that have not been explicitly destroyed.
*/
public static native void terminate();
/* Internal function for loading APR Features */
private static native int version(int what);
/* TCN_MAJOR_VERSION */
public static int TCN_MAJOR_VERSION = 0;
/* TCN_MINOR_VERSION */
public static int TCN_MINOR_VERSION = 0;
/* TCN_PATCH_VERSION */
public static int TCN_PATCH_VERSION = 0;
/* TCN_IS_DEV_VERSION */
public static int TCN_IS_DEV_VERSION = 0;
/* APR_MAJOR_VERSION */
public static int APR_MAJOR_VERSION = 0;
/* APR_MINOR_VERSION */
public static int APR_MINOR_VERSION = 0;
/* APR_PATCH_VERSION */
public static int APR_PATCH_VERSION = 0;
/* APR_IS_DEV_VERSION */
public static int APR_IS_DEV_VERSION = 0;
/* TCN_VERSION_STRING */
public static native String versionString();
/* APR_VERSION_STRING */
public static native String aprVersionString();
/**
* Setup any APR internal data structures. This MUST be the first function called for any APR library.
*
* @param libraryName the name of the library to load
*
* @return {@code true} if the native code was initialized successfully otherwise {@code false}
*
* @throws Exception if a problem occurred during initialization
*/
public static synchronized boolean initialize(String libraryName) throws Exception {
if (_instance == null) {
if (libraryName == null) {
_instance = new Library();
} else {
_instance = new Library(libraryName);
}
TCN_MAJOR_VERSION = version(0x01);
TCN_MINOR_VERSION = version(0x02);
TCN_PATCH_VERSION = version(0x03);
TCN_IS_DEV_VERSION = version(0x04);
APR_MAJOR_VERSION = version(0x11);
APR_MINOR_VERSION = version(0x12);
APR_PATCH_VERSION = version(0x13);
APR_IS_DEV_VERSION = version(0x14);
if (APR_MAJOR_VERSION < 1) {
throw new UnsatisfiedLinkError("Unsupported APR Version (" + aprVersionString() + ")");
}
}
return initialize();
}
}
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