| /* |
| * 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.beam.runners.dataflow.worker; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import org.apache.beam.sdk.coders.AtomicCoder; |
| import org.apache.beam.sdk.coders.Coder; |
| import org.apache.beam.sdk.util.VarInt; |
| import org.apache.beam.vendor.grpc.v1p21p0.com.google.protobuf.ByteString; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.io.ByteStreams; |
| |
| /** |
| * A simplified {@link Coder} for {@link ByteString}, to avoid a dependency on |
| * beam-java-sdk-extensions-protobuf. |
| */ |
| public class ByteStringCoder extends AtomicCoder<ByteString> { |
| public static ByteStringCoder of() { |
| return INSTANCE; |
| } |
| |
| private static final ByteStringCoder INSTANCE = new ByteStringCoder(); |
| |
| private ByteStringCoder() {} |
| |
| @Override |
| public void encode(ByteString value, OutputStream os) throws IOException { |
| VarInt.encode(value.size(), os); |
| value.writeTo(os); |
| } |
| |
| @Override |
| public ByteString decode(InputStream is) throws IOException { |
| int size = VarInt.decodeInt(is); |
| return ByteString.readFrom(ByteStreams.limit(is, size), size); |
| } |
| } |