/*
* 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 (ThreadDeath | 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 (ThreadDeath | 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.length() > 0) {
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 global TCN's APR pool
* This has to be the first call to TCN library.
*/
private static native boolean initialize();
/* destroy global TCN's APR pool
* This has to be the last call to TCN library.
*/
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();
}
}
