| /* |
| * 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.lucene.facet; |
| |
| import java.io.IOException; |
| import java.util.Random; |
| |
| import org.apache.lucene.store.IOContext; |
| import org.apache.lucene.store.IndexInput; |
| import org.apache.lucene.store.IndexOutput; |
| import org.apache.lucene.store.RAMDirectory; |
| import org.apache.lucene.util.ThreadInterruptedException; |
| |
| /** |
| * Test utility - slow directory |
| */ |
| // TODO: move to test-framework and sometimes use in tests? |
| public class SlowRAMDirectory extends RAMDirectory { |
| |
| private static final int IO_SLEEP_THRESHOLD = 50; |
| |
| Random random; |
| private int sleepMillis; |
| |
| public void setSleepMillis(int sleepMillis) { |
| this.sleepMillis = sleepMillis; |
| } |
| |
| public SlowRAMDirectory(int sleepMillis, Random random) { |
| this.sleepMillis = sleepMillis; |
| this.random = random; |
| } |
| |
| @Override |
| public IndexOutput createOutput(String name, IOContext context) throws IOException { |
| if (sleepMillis != -1) { |
| return new SlowIndexOutput(super.createOutput(name, context)); |
| } |
| |
| return super.createOutput(name, context); |
| } |
| |
| @Override |
| public IndexInput openInput(String name, IOContext context) throws IOException { |
| if (sleepMillis != -1) { |
| return new SlowIndexInput(super.openInput(name, context)); |
| } |
| return super.openInput(name, context); |
| } |
| |
| void doSleep(Random random, int length) { |
| int sTime = length<10 ? sleepMillis : (int) (sleepMillis * Math.log(length)); |
| if (random!=null) { |
| sTime = random.nextInt(sTime); |
| } |
| try { |
| Thread.sleep(sTime); |
| } catch (InterruptedException e) { |
| throw new ThreadInterruptedException(e); |
| } |
| } |
| |
| /** Make a private random. */ |
| Random forkRandom() { |
| if (random == null) { |
| return null; |
| } |
| return new Random(random.nextLong()); |
| } |
| |
| /** |
| * Delegate class to wrap an IndexInput and delay reading bytes by some |
| * specified time. |
| */ |
| private class SlowIndexInput extends IndexInput { |
| private IndexInput ii; |
| private int numRead = 0; |
| private Random rand; |
| |
| public SlowIndexInput(IndexInput ii) { |
| super("SlowIndexInput(" + ii + ")"); |
| this.rand = forkRandom(); |
| this.ii = ii; |
| } |
| |
| @Override |
| public byte readByte() throws IOException { |
| if (numRead >= IO_SLEEP_THRESHOLD) { |
| doSleep(rand, 0); |
| numRead = 0; |
| } |
| ++numRead; |
| return ii.readByte(); |
| } |
| |
| @Override |
| public void readBytes(byte[] b, int offset, int len) throws IOException { |
| if (numRead >= IO_SLEEP_THRESHOLD) { |
| doSleep(rand, len); |
| numRead = 0; |
| } |
| numRead += len; |
| ii.readBytes(b, offset, len); |
| } |
| |
| // TODO: is it intentional that clone doesnt wrap? |
| @Override public IndexInput clone() { return ii.clone(); } |
| @Override public IndexInput slice(String sliceDescription, long offset, long length) throws IOException { |
| return ii.slice(sliceDescription, offset, length); |
| } |
| @Override public void close() throws IOException { ii.close(); } |
| @Override public boolean equals(Object o) { return ii.equals(o); } |
| @Override public long getFilePointer() { return ii.getFilePointer(); } |
| @Override public int hashCode() { return ii.hashCode(); } |
| @Override public long length() { return ii.length(); } |
| @Override public void seek(long pos) throws IOException { ii.seek(pos); } |
| |
| } |
| |
| /** |
| * Delegate class to wrap an IndexOutput and delay writing bytes by some |
| * specified time. |
| */ |
| private class SlowIndexOutput extends IndexOutput { |
| |
| private IndexOutput io; |
| private int numWrote; |
| private final Random rand; |
| |
| public SlowIndexOutput(IndexOutput io) { |
| super("SlowIndexOutput(" + io + ")", io.getName()); |
| this.io = io; |
| this.rand = forkRandom(); |
| } |
| |
| @Override |
| public void writeByte(byte b) throws IOException { |
| if (numWrote >= IO_SLEEP_THRESHOLD) { |
| doSleep(rand, 0); |
| numWrote = 0; |
| } |
| ++numWrote; |
| io.writeByte(b); |
| } |
| |
| @Override |
| public void writeBytes(byte[] b, int offset, int length) throws IOException { |
| if (numWrote >= IO_SLEEP_THRESHOLD) { |
| doSleep(rand, length); |
| numWrote = 0; |
| } |
| numWrote += length; |
| io.writeBytes(b, offset, length); |
| } |
| |
| @Override public void close() throws IOException { io.close(); } |
| @Override public long getFilePointer() { return io.getFilePointer(); } |
| @Override public long getChecksum() throws IOException { return io.getChecksum(); } |
| } |
| |
| } |