| /* |
| * 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 |
| * |
| * https://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.avro.grpc; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import io.grpc.Drainable; |
| |
| /** |
| * An {@link InputStream} backed by Avro RPC request/response that can drained |
| * to a{@link OutputStream}. |
| */ |
| public abstract class AvroInputStream extends InputStream implements Drainable { |
| /** |
| * Container to hold the serialized Avro payload when its read before draining |
| * it. |
| */ |
| private ByteArrayInputStream partial; |
| |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| return getPartialInternal().read(b, off, len); |
| } |
| |
| @Override |
| public int read() throws IOException { |
| return getPartialInternal().read(); |
| } |
| |
| private ByteArrayInputStream getPartialInternal() throws IOException { |
| if (partial == null) { |
| ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); |
| drainTo(outputStream); |
| partial = new ByteArrayInputStream(outputStream.toByteArray()); |
| } |
| return partial; |
| } |
| |
| protected ByteArrayInputStream getPartial() { |
| return partial; |
| } |
| |
| /** |
| * An {@link OutputStream} that writes to a target {@link OutputStream} and |
| * provides total number of bytes written to it. |
| */ |
| protected static class CountingOutputStream extends OutputStream { |
| private final OutputStream target; |
| private int writtenCount = 0; |
| |
| public CountingOutputStream(OutputStream target) { |
| this.target = target; |
| } |
| |
| @Override |
| public void write(byte[] b, int off, int len) throws IOException { |
| target.write(b, off, len); |
| writtenCount += len; |
| } |
| |
| @Override |
| public void write(int b) throws IOException { |
| target.write(b); |
| writtenCount += 1; |
| } |
| |
| @Override |
| public void flush() throws IOException { |
| target.flush(); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| target.close(); |
| } |
| |
| public int getWrittenCount() { |
| return writtenCount; |
| } |
| } |
| } |