| /* |
| * 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.store; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * Used by MockDirectoryWrapper to create an input stream that |
| * keeps track of when it's been closed. |
| */ |
| |
| public class MockIndexInputWrapper extends IndexInput { |
| private MockDirectoryWrapper dir; |
| final String name; |
| private IndexInput delegate; |
| private volatile boolean closed; |
| |
| // Which MockIndexInputWrapper we were cloned from, or null if we are not a clone: |
| private final MockIndexInputWrapper parent; |
| |
| /** Sole constructor */ |
| public MockIndexInputWrapper(MockDirectoryWrapper dir, String name, IndexInput delegate, MockIndexInputWrapper parent) { |
| super("MockIndexInputWrapper(name=" + name + " delegate=" + delegate + ")"); |
| |
| // If we are a clone then our parent better not be a clone! |
| assert parent == null || parent.parent == null; |
| |
| this.parent = parent; |
| this.name = name; |
| this.dir = dir; |
| this.delegate = delegate; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| if (closed) { |
| delegate.close(); // don't mask double-close bugs |
| return; |
| } |
| closed = true; |
| |
| try (Closeable delegate = this.delegate) { |
| // Pending resolution on LUCENE-686 we may want to |
| // remove the conditional check so we also track that |
| // all clones get closed: |
| assert delegate != null; |
| if (parent == null) { |
| dir.removeIndexInput(this, name); |
| } |
| dir.maybeThrowDeterministicException(); |
| } |
| } |
| |
| private void ensureOpen() { |
| // TODO: not great this is a volatile read (closed) ... we should deploy heavy JVM voodoo like SwitchPoint to avoid this |
| if (closed) { |
| throw new RuntimeException("Abusing closed IndexInput!"); |
| } |
| if (parent != null && parent.closed) { |
| throw new RuntimeException("Abusing clone of a closed IndexInput!"); |
| } |
| } |
| |
| @Override |
| public MockIndexInputWrapper clone() { |
| ensureOpen(); |
| if (dir.verboseClone) { |
| new Exception("clone: " + this).printStackTrace(System.out); |
| } |
| dir.inputCloneCount.incrementAndGet(); |
| IndexInput iiclone = delegate.clone(); |
| MockIndexInputWrapper clone = new MockIndexInputWrapper(dir, name, iiclone, parent != null ? parent : this); |
| // Pending resolution on LUCENE-686 we may want to |
| // uncomment this code so that we also track that all |
| // clones get closed: |
| /* |
| synchronized(dir.openFiles) { |
| if (dir.openFiles.containsKey(name)) { |
| Integer v = (Integer) dir.openFiles.get(name); |
| v = Integer.valueOf(v.intValue()+1); |
| dir.openFiles.put(name, v); |
| } else { |
| throw new RuntimeException("BUG: cloned file was not open?"); |
| } |
| } |
| */ |
| return clone; |
| } |
| |
| @Override |
| public IndexInput slice(String sliceDescription, long offset, long length) throws IOException { |
| ensureOpen(); |
| if (dir.verboseClone) { |
| new Exception("slice: " + this).printStackTrace(System.out); |
| } |
| dir.inputCloneCount.incrementAndGet(); |
| IndexInput slice = delegate.slice(sliceDescription, offset, length); |
| MockIndexInputWrapper clone = new MockIndexInputWrapper(dir, sliceDescription, slice, parent != null ? parent : this); |
| return clone; |
| } |
| |
| @Override |
| public long getFilePointer() { |
| ensureOpen(); |
| return delegate.getFilePointer(); |
| } |
| |
| @Override |
| public void seek(long pos) throws IOException { |
| ensureOpen(); |
| delegate.seek(pos); |
| } |
| |
| @Override |
| public long length() { |
| ensureOpen(); |
| return delegate.length(); |
| } |
| |
| @Override |
| public byte readByte() throws IOException { |
| ensureOpen(); |
| return delegate.readByte(); |
| } |
| |
| @Override |
| public void readBytes(byte[] b, int offset, int len) throws IOException { |
| ensureOpen(); |
| delegate.readBytes(b, offset, len); |
| } |
| |
| @Override |
| public void readBytes(byte[] b, int offset, int len, boolean useBuffer) |
| throws IOException { |
| ensureOpen(); |
| delegate.readBytes(b, offset, len, useBuffer); |
| } |
| |
| @Override |
| public short readShort() throws IOException { |
| ensureOpen(); |
| return delegate.readShort(); |
| } |
| |
| @Override |
| public int readInt() throws IOException { |
| ensureOpen(); |
| return delegate.readInt(); |
| } |
| |
| @Override |
| public long readLong() throws IOException { |
| ensureOpen(); |
| return delegate.readLong(); |
| } |
| |
| @Override |
| public String readString() throws IOException { |
| ensureOpen(); |
| return delegate.readString(); |
| } |
| |
| @Override |
| public int readVInt() throws IOException { |
| ensureOpen(); |
| return delegate.readVInt(); |
| } |
| |
| @Override |
| public long readVLong() throws IOException { |
| ensureOpen(); |
| return delegate.readVLong(); |
| } |
| |
| @Override |
| public int readZInt() throws IOException { |
| ensureOpen(); |
| return delegate.readZInt(); |
| } |
| |
| @Override |
| public long readZLong() throws IOException { |
| ensureOpen(); |
| return delegate.readZLong(); |
| } |
| |
| @Override |
| public void skipBytes(long numBytes) throws IOException { |
| ensureOpen(); |
| super.skipBytes(numBytes); |
| } |
| |
| @Override |
| public Map<String,String> readMapOfStrings() throws IOException { |
| ensureOpen(); |
| return delegate.readMapOfStrings(); |
| } |
| |
| @Override |
| public Set<String> readSetOfStrings() throws IOException { |
| ensureOpen(); |
| return delegate.readSetOfStrings(); |
| } |
| |
| @Override |
| public String toString() { |
| return "MockIndexInputWrapper(" + delegate + ")"; |
| } |
| } |
| |