| /* |
| * Copyright 2015, Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package io.grpc; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import javax.annotation.Nullable; |
| import javax.annotation.concurrent.ThreadSafe; |
| |
| /** |
| * Encloses classes related to the compression and decompression of messages. |
| */ |
| @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1704") |
| @ThreadSafe |
| public final class CompressorRegistry { |
| private static final CompressorRegistry DEFAULT_INSTANCE = new CompressorRegistry( |
| new Codec.Gzip(), |
| Codec.Identity.NONE); |
| |
| public static CompressorRegistry getDefaultInstance() { |
| return DEFAULT_INSTANCE; |
| } |
| |
| public static CompressorRegistry newEmptyInstance() { |
| return new CompressorRegistry(); |
| } |
| |
| private final ConcurrentMap<String, Compressor> compressors; |
| |
| @VisibleForTesting |
| CompressorRegistry(Compressor ...cs) { |
| compressors = new ConcurrentHashMap<String, Compressor>(); |
| for (Compressor c : cs) { |
| compressors.put(c.getMessageEncoding(), c); |
| } |
| } |
| |
| @Nullable |
| public Compressor lookupCompressor(String compressorName) { |
| return compressors.get(compressorName); |
| } |
| |
| /** |
| * Registers a compressor for both decompression and message encoding negotiation. |
| * |
| * @param c The compressor to register |
| */ |
| public void register(Compressor c) { |
| String encoding = c.getMessageEncoding(); |
| checkArgument(!encoding.contains(","), "Comma is currently not allowed in message encoding"); |
| compressors.put(encoding, c); |
| } |
| } |