| package org.apache.lucene.store; |
| /* |
| * 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. |
| */ |
| import java.io.IOException; |
| |
| /** |
| * A {@link RateLimiter rate limiting} {@link IndexOutput} |
| * |
| * @lucene.internal |
| */ |
| final class RateLimitedIndexOutput extends BufferedIndexOutput { |
| |
| private final IndexOutput delegate; |
| private final BufferedIndexOutput bufferedDelegate; |
| private final RateLimiter rateLimiter; |
| |
| RateLimitedIndexOutput(final RateLimiter rateLimiter, final IndexOutput delegate) { |
| // TODO should we make buffer size configurable |
| if (delegate instanceof BufferedIndexOutput) { |
| bufferedDelegate = (BufferedIndexOutput) delegate; |
| this.delegate = delegate; |
| } else { |
| this.delegate = delegate; |
| bufferedDelegate = null; |
| } |
| this.rateLimiter = rateLimiter; |
| } |
| |
| @Override |
| protected void flushBuffer(byte[] b, int offset, int len) throws IOException { |
| rateLimiter.pause(len); |
| if (bufferedDelegate != null) { |
| bufferedDelegate.flushBuffer(b, offset, len); |
| } else { |
| delegate.writeBytes(b, offset, len); |
| } |
| |
| } |
| |
| @Override |
| public long length() throws IOException { |
| return delegate.length(); |
| } |
| |
| @Override |
| public void flush() throws IOException { |
| try { |
| super.flush(); |
| } finally { |
| delegate.flush(); |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| try { |
| super.close(); |
| } finally { |
| delegate.close(); |
| } |
| } |
| } |