pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / facet / src / test / org / apache / lucene / util / SlowRAMDirectory.java

diff --git a/lucene-java-3.5.0/lucene/contrib/facet/src/test/org/apache/lucene/util/SlowRAMDirectory.java b/lucene-java-3.5.0/lucene/contrib/facet/src/test/org/apache/lucene/util/SlowRAMDirectory.java
new file mode 100644 (file)
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--- /dev/null
+++ b/lucene-java-3.5.0/lucene/contrib/facet/src/test/org/apache/lucene/util/SlowRAMDirectory.java
@@ -0,0 +1,167 @@
+package org.apache.lucene.util;
+
+/**
+ * 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;
+import java.util.Random;
+
+import org.apache.lucene.store.IndexInput;
+import org.apache.lucene.store.IndexOutput;
+import org.apache.lucene.store.RAMDirectory;
+
+/**
+ * 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;
+  
+  private 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) throws IOException {
+    if (sleepMillis != -1) {
+      return new SlowIndexOutput(super.createOutput(name));
+    } 
+
+    return super.createOutput(name);
+  }
+
+  @Override
+  public IndexInput openInput(String name) throws IOException {
+    if (sleepMillis != -1) {
+      return new SlowIndexInput(super.openInput(name));
+    } 
+    return super.openInput(name);
+  }
+
+  @Override
+  public IndexInput openInput(String name, int bufferSize) throws IOException {
+    if (sleepMillis != -1) {
+      return new SlowIndexInput(super.openInput(name, bufferSize));
+    } 
+    return super.openInput(name, bufferSize);
+  }
+
+  void doSleep(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);
+    }
+  }
+
+  /**
+   * 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;
+    
+    public SlowIndexInput(IndexInput ii) {
+      super("SlowIndexInput(" + ii + ")");
+      this.ii = ii;
+    }
+    
+    @Override
+    public byte readByte() throws IOException {
+      if (numRead >= IO_SLEEP_THRESHOLD) {
+        doSleep(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(len);
+        numRead = 0;
+      }
+      numRead += len;
+      ii.readBytes(b, offset, len);
+    }
+    
+    @Override public Object clone() { return ii.clone(); }
+    @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;
+    
+    public SlowIndexOutput(IndexOutput io) {
+      this.io = io;
+    }
+    
+    @Override
+    public void writeByte(byte b) throws IOException {
+      if (numWrote >= IO_SLEEP_THRESHOLD) {
+        doSleep(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(length);
+        numWrote = 0;
+      }
+      numWrote += length;
+      io.writeBytes(b, offset, length);
+    }
+    
+    @Override public void close() throws IOException { io.close(); }
+    @Override public void flush() throws IOException { io.flush(); }
+    @Override public long getFilePointer() { return io.getFilePointer(); }
+    @Override public long length() throws IOException { return io.length(); }
+    @Override public void seek(long pos) throws IOException { io.seek(pos); }
+  }
+  
+}