84 lines
2.7 KiB
Java
84 lines
2.7 KiB
Java
/*
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* Copyright 2021 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.compression;
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import com.aayushatharva.brotli4j.Brotli4jLoader;
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import io.netty.util.internal.PlatformDependent;
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import io.netty.util.internal.logging.InternalLogger;
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import io.netty.util.internal.logging.InternalLoggerFactory;
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public final class Brotli {
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private static final InternalLogger logger = InternalLoggerFactory.getInstance(Brotli.class);
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private static final ClassNotFoundException CNFE;
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private static Throwable cause;
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static {
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ClassNotFoundException cnfe = null;
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try {
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Class.forName("com.aayushatharva.brotli4j.Brotli4jLoader", false,
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PlatformDependent.getClassLoader(Brotli.class));
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} catch (ClassNotFoundException t) {
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cnfe = t;
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logger.debug(
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"brotli4j not in the classpath; Brotli support will be unavailable.");
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}
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CNFE = cnfe;
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// If in the classpath, try to load the native library and initialize brotli4j.
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if (cnfe == null) {
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cause = Brotli4jLoader.getUnavailabilityCause();
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if (cause != null) {
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logger.debug("Failed to load brotli4j; Brotli support will be unavailable.", cause);
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}
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}
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}
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/**
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*
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* @return true when brotli4j is in the classpath
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* and native library is available on this platform and could be loaded
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*/
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public static boolean isAvailable() {
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return CNFE == null && Brotli4jLoader.isAvailable();
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}
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/**
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* Throws when brotli support is missing from the classpath or is unavailable on this platform
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* @throws Throwable a ClassNotFoundException if brotli4j is missing
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* or a UnsatisfiedLinkError if brotli4j native lib can't be loaded
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*/
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public static void ensureAvailability() throws Throwable {
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if (CNFE != null) {
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throw CNFE;
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}
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Brotli4jLoader.ensureAvailability();
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}
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/**
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* Returns {@link Throwable} of unavailability cause
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*/
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public static Throwable cause() {
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return cause;
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}
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private Brotli() {
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}
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}
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