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Tomcat example source code file (Library.java)
The Tomcat Library.java source code/* * 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; /** Library * * @author Mladen Turk * @version $Revision: 467222 $, $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $ */ public final class Library { /* Default library names */ private static String [] NAMES = {"tcnative-1", "libtcnative-1"}; /* * A handle to the unique Library singleton instance. */ static private Library _instance = null; private Library() { boolean loaded = false; String err = ""; for (int i = 0; i < NAMES.length; i++) { try { System.loadLibrary(NAMES[i]); loaded = true; } catch (Throwable e) { if ( i > 0) err += ", "; err += e.getMessage(); } if (loaded) break; } if (!loaded) { err += "("; err += System.getProperty("java.library.path"); err += ")"; throw new UnsatisfiedLinkError(err); } } 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 boolean has(int what); /* Internal function for loading APR Features */ private static native int version(int what); /* Internal function for loading APR sizes */ private static native int size(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(); /* APR Feature Macros */ public static boolean APR_HAVE_IPV6 = false; public static boolean APR_HAS_SHARED_MEMORY = false; public static boolean APR_HAS_THREADS = false; public static boolean APR_HAS_SENDFILE = false; public static boolean APR_HAS_MMAP = false; public static boolean APR_HAS_FORK = false; public static boolean APR_HAS_RANDOM = false; public static boolean APR_HAS_OTHER_CHILD = false; public static boolean APR_HAS_DSO = false; public static boolean APR_HAS_SO_ACCEPTFILTER = false; public static boolean APR_HAS_UNICODE_FS = false; public static boolean APR_HAS_PROC_INVOKED = false; public static boolean APR_HAS_USER = false; public static boolean APR_HAS_LARGE_FILES = false; public static boolean APR_HAS_XTHREAD_FILES = false; public static boolean APR_HAS_OS_UUID = false; /* Are we big endian? */ public static boolean APR_IS_BIGENDIAN = false; /* APR sets APR_FILES_AS_SOCKETS to 1 on systems where it is possible * to poll on files/pipes. */ public static boolean APR_FILES_AS_SOCKETS = false; /* This macro indicates whether or not EBCDIC is the native character set. */ public static boolean APR_CHARSET_EBCDIC = false; /* Is the TCP_NODELAY socket option inherited from listening sockets? */ public static boolean APR_TCP_NODELAY_INHERITED = false; /* Is the O_NONBLOCK flag inherited from listening sockets? */ public static boolean APR_O_NONBLOCK_INHERITED = false; public static int APR_SIZEOF_VOIDP; public static int APR_PATH_MAX; public static int APRMAXHOSTLEN; public static int APR_MAX_IOVEC_SIZE; public static int APR_MAX_SECS_TO_LINGER; public static int APR_MMAP_THRESHOLD; public static int APR_MMAP_LIMIT; /* return global TCN's APR pool */ public static native long globalPool(); /** * 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 */ static public 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); APR_SIZEOF_VOIDP = size(1); APR_PATH_MAX = size(2); APRMAXHOSTLEN = size(3); APR_MAX_IOVEC_SIZE = size(4); APR_MAX_SECS_TO_LINGER = size(5); APR_MMAP_THRESHOLD = size(6); APR_MMAP_LIMIT = size(7); APR_HAVE_IPV6 = has(0); APR_HAS_SHARED_MEMORY = has(1); APR_HAS_THREADS = has(2); APR_HAS_SENDFILE = has(3); APR_HAS_MMAP = has(4); APR_HAS_FORK = has(5); APR_HAS_RANDOM = has(6); APR_HAS_OTHER_CHILD = has(7); APR_HAS_DSO = has(8); APR_HAS_SO_ACCEPTFILTER = has(9); APR_HAS_UNICODE_FS = has(10); APR_HAS_PROC_INVOKED = has(11); APR_HAS_USER = has(12); APR_HAS_LARGE_FILES = has(13); APR_HAS_XTHREAD_FILES = has(14); APR_HAS_OS_UUID = has(15); APR_IS_BIGENDIAN = has(16); APR_FILES_AS_SOCKETS = has(17); APR_CHARSET_EBCDIC = has(18); APR_TCP_NODELAY_INHERITED = has(19); APR_O_NONBLOCK_INHERITED = has(20); if (APR_MAJOR_VERSION < 1) { throw new UnsatisfiedLinkError("Unsupported APR Version (" + aprVersionString() + ")"); } if (!APR_HAS_THREADS) { throw new UnsatisfiedLinkError("Missing APR_HAS_THREADS"); } } return initialize(); } } Other Tomcat examples (source code examples)Here is a short list of links related to this Tomcat Library.java source code file: |
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